Working Principle of Rapi Scan 527/528

Working Principle of Rapi Scan 527/528

As son as an object enter the inspection chamber and cut off the beam of infrared rays made by OSM (Optical Sensor Module) it is suddenly transmitted to System Control Board and System Control Board Command the X-Ray controller to turn the X-Rays on.

When X-Ray are turned on, it starts scanning the object some x-rays pass through the object , some are absorbed and some are scattered in different directions according to the density of object. After passing through the object , X-Rays are detected by LXDA (Liner x-Ray Detector Array/ Diode) board which converts these X-Rays signal into digital signal and send these signal to Main  Computer Memory  where after normalization and processing with the help of SVGA (Super Video Graphic Adopter) these signal are converted into video signals and sent to VDU (Video Display Unit) as an image.

st Image Processor). HIP Board these converted these digital signals into video signals and sent to VDU (Video Display Unit) as an image.
urity measures to protect Departure Lounge/Aircraft Cabin. All Articles which can be used to commit an act of unlawful interference are prohibited to carry beyond this point.

Working Principle of Working Principle of Lian Scan LS-215/LS-237/LS-107

Working Principle of Working Principle of Lian Scan LS-215/LS-237/LS-107

As son as an object enter the inspection chamber and cut off the beam of infrared rays made by OSM (Optical Sensor Module) it is suddenly transmitted to System Control Board and System Control Board Command the X-Ray controller to turn the X-Rays on.

When X-Ray are turned on, it starts scanning the object some x-rays pass through the object , some are absorbed and some are scattered in different directions according to the density of object. After passing through the object , X-Rays are detected by LXDA (Liner x-Ray Detector Array/ Diode) board which converts these X-Rays signal into analog signal and send these signal to ADC (Analog to Digital Converter),ADC  board converts these analog signals to digital signals and send tese signals to DTP (Dtat Transfer Processor)  where these digital signals are arranged in a sequence and then sent to HIP (Host Image Processor). HIP Board these converted these digital signals into video signals and sent to VDU (Video Display Unit) as an image.

urity measures to protect Departure Lounge/Aircraft Cabin. All Articles which can be used to commit an act of unlawful interference are prohibited to carry beyond this point.

Working Principle of Lian Scan-PX-107/PX-ACX 6.4

Working Principle of Lian Scan-PX-107/PX-ACX 6.4

As son as an object enter the inspection chamber and cut off the beam of infrared rays made by OSM (Optical Sensor Module) it is suddenly transmitted to System Control Board and System Control Board Command the X-Ray controller to turn the X-Rays on.

When X-Ray are turned on, it starts scanning the object some x-rays pass through the object , some are absorbed and some are scattered in different directions according to the density of object. After passing through the object , X-Rays are detected by LXDA (Liner x-Ray Detector Array/ Diode) board which converts these X-Rays signal into digital signal and send these signal to Main  Computer Memory  where after normalization and processing with the help of SVGA (Super Video Graphic Adopter) these signal are converted into video signals and sent to VDU (Video Display Unit) as an image.

Working Principle of Hi-Scan 6040-i/9075

Working Principle of Hi-Scan 6040-i/9075

As son as an object enter the inspection chamber and cut off the beam of infrared rays made by Light Barriers it is suddenly transmitted to System Control Board and System Control Board Command the X-Ray controller to turn the X-Rays on.

When X-Ray are turned on, it starts scanning the object some x-rays pass through the object , some are absorbed and some are scattered in different directions according to the density of object. After passing through the object , X-Rays are detected by LXDA (Liner x-Ray Detector Array/ Diode) board which converts these X-Rays signal into digital signal and send these signal to Hi-Trax Computer, where after normalization and processing with the help of SVGA (Super Video Graphic Adopter) these signal are converted into video signals and sent to VDU (Video Display Unit) as an image.

Working Principle of Astrophysics XIS-100-X/7858

Working Principle of Astrophysics XIS-100-X/7858

As son as an object enter the inspection chamber and cut off the beam of infrared rays made by PEC (Photo Emission Controller), it is suddenly transmitted to PLC (Programmable Logic Controller) and PLC Command the X-Ray controller to turn the X-Rays on.

When X-Ray are turned on, it starts scanning the object some x-rays pass through the object , some are absorbed and some are scattered in different directions according to the density of object. After passing through the object , X-Rays are detected by LXDA (Liner x-Ray Detector Array/ Diode) board which converts these X-Rays signal into analog signal and send these signal to Data Acquisition System (DAS) board , DAS board converts these analog signals into digital signal and sent these signal into man memory of computer where after normalization and processing with the help of SVGA (Super Video Graphic Adopter) these signal are converted into video signals and sent to VDU (Video Display Unit) as an image.

sup> Priority is weapon / ammunition to look for in an image.

Threat Classification

Threat Classification

While interpreting X-Ray images an image needs to be classified in following one of three categories.

1.       No Threat

If item and its contents pose no threat and containing no weapon, explosive device or any other threat object then it will be categorized No Threat.

2.       Potential Threat.

If items pr its contents pose a possible threat, something indicates that threat my be persent and needs to be examined further or operator cannot identify the object positively then it will be remedial action will be to refer the bag for manual /Physical Search.

3.       Oblivious threat

If clear threat exists and operator can clearly identify the threat object (Ammunition, weapons, IEDs) in an image, then it will be classified is oblivious threat.

Remedial action will be to call for assistance. 

Screening Standard is set by ICAO (International Civil Aviation Organization)

Screener Standard

Screening Standard is set by ICAO (International Civil Aviation Organization)

Section 4.1.1 of Annex-17 ICAO manual states:

“Each Contracting State shall establish measures to prevent weapons, explosive or any other dangerous devices , articles or substance , which may be used to commit an act unlawful interference , the carriage or bearing of which is not authorized , from being introduced by any means whatsoever , on board an aircraft engaged in civil aviation. 

IED (Improvised Explosive Device)

IED (Improvised Explosive Device)

A homemade Explosive Device, which can be easily concealed in an item of daily use apparently, seems and having, resemblance with its surrounding is called IED.

An IED Consists of 04x main components

                                 i.            Initiator /Igniter

                               ii.            Delay Device

                              iii.            Blasting Cap/ Detonator.

                             iv.            Main charge

IEDs Falls into following 03x categories

                                 i.            Packge Type IED

                               ii.            Vehicle Born IED (VBIED)

                              iii.            Personal-Born IED (PBIED)

Chain of Detonation/ Explosive Train

Chain of Detonation/ Explosive Train

Initiator /Igniter 

It is used initiate the detonation sequence e.g Flame, Friction, Striker, Chemical etc. 

Delay Device 

It is device to provide required delay. e.g safety fuse, clock, timer, switch, remote control, etc. Switches are four i.e Push Switch, Pull Switch, Push to release, Pull to Release Switch. 

Blasting Cap/ Detonator. 

A Detonator is a device , Consisting of primary high Explosive , used to trigger an explosive device. Detonator can be chemically, mechanically or electrically initiated, the latter two being the most common. Detonators are of two type i.e Electrical & non Electrical. 

Booster. 

When amount of main charge is very huge a booster is used between blasting Cap and main charge. Blasting Cap detonates the booster and then booster further detonates the main charge (For huge blast only other wise not required) 

Main charge 

Insensitive High Explosive or Secondary High Explosive Sometime mixed with low Explosive is used as Main Charge e.g TNT, RDX, PETN Dynamite etc.

Explosive

Explosive

It is a chemically unstable material which is when suitably initiated, change its chemical composition rearranging its molecules to become stable from an unstable structure, resulting intense pressure on its surrounding with a simultaneous evolution of great amount of heat and gases causing destruction.

i.                  

Low explosive

An explosive whose velocity of detonation is less than 331 m/s (Speed of Sound) is called low explosive. When initiated, chemical reaction is comparatively slow. Low explosive are mostly solid combustible materials that decomposed rapidly, but do not normally explode. This action is known as deflationary  Black powder, smoke powder, Gun powder and carbide are example of low explosive.

ii. High Explosive

An explosive whose velocity of detonation is more than 331 m/s (Speed of Sound) is called High explosive. . When initiated, chemical reaction is very fast. When initiated by a blow or shock, it decomposes almost instantaneously

TNT (Tri Nitro Toluene) RDX, (Research Departmental Explosive), C-4 (Composition-4), PETN (Penta  Erythritol Tetra Nitrate), NG (Nitro Glycerin), ANFO (Ammonium Nitro Fuel Oil), TATP (Tri Acetone Tri Per Oxide) SEMTEX (Plastic Explosive) High Explosive Further Divided into two Groups.

a. Primary High Explosive.

A Primary High Explosive is an explosive that is extremely to stimuli such as impact. Friction, heat static electricity or electromagnetic radiation. A relatively small amount of energy is required for initiation . e.g Lead Azide, Led Styphnate , Silver Azide, Mercury Fulminate, Mercury Nitride, Nitro Glycerin ,PETN. 

b. Secondary High Explosive 

A secondary High Explosive is less sensitive than a primary explosive and require substantially more energy to be initiated. Because they are less sensitive are usable in a wider variety of applications and are safer to handle and store. Secondary Explosive are used in larger quantities in an explosive train and are usually initiated by a smaller quantity of primary explosive. e.g TNT,RDX,C-4,SEMTEX.

Dangrous Goods.

Dangrous Goods.

Dagrous goods are defines as those goods which meet the criteria of one or more of nine United Nations Hazrads classes and where applicable , to ne of three united nation Packing Groups according to the provisions.

Dangrous goods are classified into 09x classes in accordance to the optional risk associated with them while transporting by Air.

1.       Explosive

2.       Gasses

3.       Flammable Liquid

4.       Flammable Solid

5.       Oxidizing Substance and organic per Oxides

6.       Toxic and infectious Substance

7.       Radio Active Material

8.       Corrosive

9.       Miscellanea Dangerous Goods.

Dangerous Goods are divided into 03x Unite Nation Packing Group.

1.       UN Packing Group-I        (To Pack the items presenting High Danger)

2.       UN Packing Group-II       (To Pack the items presenting Medium Danger)

3.       UN Packing Group-III     (To Pack the items presenting Low Danger)

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'A' & 'B' are two fixed points in a field. A cyclist 'C' moves such that

Q. 'A' & 'B' are two fixed points in a field. A cyclist 'C' moves such that
  1 The path followed by the cyclist is an ellipse
  2 The path followed by the cyclist is a circle
  3 The path followed by the clyclist is an exponencial curve
  4 This type of motion is not possible
    Ans:2 

Q. Which one of the following schedules of the Indian Constitution lists the names of states and specifies their territories?
  1 First
  2 Second
  3 Third
  4 Fourth
    Ans:1 

Q. In the FIFA World Cup Football event in the year 2002, the number of goals scored by Ronaldo of Brazil was
  1 6
  2 7
  3 8
  4 9
    Ans:3 

Q. When Congress leaders condemned the Montagu Chelmsford Report, many moderates left party to form the
  1 Swarajya Party
  2 Indian Freedom Party
  3 Independence Federation of India
  4 Indian Liberal Federation
    Ans:4 

Q. An important aspect of the Cripps Mission of 1942 was
  1 that all Indian States should join the Indian Union as a condition to consider any degree of autonomy for India
  2 the creation of an Indian Union with Dominion status very soon after the Second World War
  3 the active participation and cooperation of the Indian people, communities and political parties in the British war effort as a condition for granting independence with full sovereign status to India after war.
  4 the framing of a constitution for the entire Indian Union, with no separate constitution to be accep
    Ans:2 

Q. With reference to colonial rule in India, what was sought by the Ilbert Bill in 1883
  1 To bring Indians and Europeans on par as far as the criminal jurisdiction of courts was concerned
  2 To impose severe restrictions on the freedom of the native press as it was perceived to be hostile to colonial rulers
  3 To encourage the native Indians to appear for civil service examinations by conducting them in India
  4 To allow native Indians to possess arms by amending the Arms act
    Ans:1 

Q. What was the main reason for a great civil strife in Argentina in 2002-03?
  1 Ethnic conflict between the native Red Indian tribes and others
  2 Economic crisis due to huge public debt
  3 The issue of using native languages as medium of instruction in schools
  4 Clashes between goverment troops and secessionist groups
    Ans:2 

Q. Sandeep Pandey, the winner of Raman Magsaysay Award, is mainly an activist in 
  1 prevention of child marriages
  2 promotion of communal harmony
  3 environmental protection
  4 education and livelihood projects for Dalits
    Ans:4 

Q. Total time taken by a person in going to a place by walking and returning on cycle is 5 hours 45 minutes. He would have gained 2 hours by cycling both ways. The time taken by him to walk both ways is
  1 6 hours 45 minutes
  2 7 hours 45 minutes
  3 8 hours 15 minutes
  4 8 hours 30 minutes
    Ans:2 

Q. Which among the following countries was the earliest to give women the right to vote?
  1 Iceland
  2 India
  3 New Zealand
  4 USA
    Ans:3 

What is Value Added Tax (VAT)

Q. What is Value Added Tax (VAT)
  1 A simple, transparent, easy to pay tax imposed on consumers
  2 A new initiative taken by the government to increase the tax-burden of high income groups
  3 A single tax that replaces state taxes like, surcharge turnover tax and sales tax, etc.
  4 A new tax to be imposed on the producers of capital goods
    Ans:1 

Q. The difference between visible exports and visible imports is defined as—
  1 Balance of trade
  2 Balance of payment
  3 Balanced terms of trade
  4 Coins from trade
    Ans:1 

Q. Given the money wages, if the price level in an economy increases, then the real wages will—
  1 Increase
  2 Decrease
  3 Remain constant
  4 Become flexible
    Ans:2 

Q. The World Trade Organisation (WTO) was earlier known as—
  1 GATT
  2 UNICEF
  3 UNCTAD
  4 FAO
    Ans:1 

Q. A firm is in equilibrium when its—
  1 Marginal cost equals the marginal revenue
  2 Total cost is minimum
  3 Total revenue is maximum
  4 Average revenue and marginal revenue are equal
    Ans:1 

Q. In the law of demand, the statement ‘other things remain constant’ means—
  1 Income of consumer should not change
  2 Prices of other goods should not change
  3 Taste of consumer should not change
  4 All of the above
    Ans:4 

Q. Special Economic Zones are being set up in—
  1 Agra, Kanpur and Modinagar
  2 Agra, Kanpur and Greater Noida
  3 Meerut, Moradabad, Kanpur and Noida
  4 Moradabad, Kanpur, Noida and Greater Noida
    Ans:2 

Q. Select the one which is not the responsibility of Gram Sabha under the Rural Employment Guarantee Act, 2005
  1 To recommend projects to the Gram Panchayat and prepare list of possible works
  2 To receive applications for work and issue a dated receipt
  3 To monitor the execution of works within the Gram Panchayat
  4 To conduct regular social audits of all the projects taken up with in the Gram Panchayat
    Ans:2 

Q. A labour intensive industry is one that—
  1 Requires hard manual labour
  2 Pays adequate wages to the labour
  3 Employs more hands
  4 Provides facilities to labour
    Ans:3 

Q. Invisible export means export of—
  1 Services
  2 Prohibited goods
  3 Unrecorded goods
  4 Goods through smuggling
    Ans:1 

Philippines Embassy in Pakistan> Address, Phone Number, Fax, Email and Website

Philippines Embassy in Pakistan> Address, Phone Number, Fax, Email and Website
Philippines Embassy / High Commission / Consulate for Pakistan

Office               :           Embassy
Street Address :           House No. 8, Street 60, F-7/4, Islamabad Pakistan
Postal Address :           P.O. Box 1052, Islamabad
Telephone        :           (9251) 2824-4933
Fax                  :           00-9251-227-7389
Email                :           isdpe@isb.comsats.net.pk

Pakistani Embassy in North Korea

Pakistani Embassy in North Korea

Address :   Building #23, Block 66, Munsodong, Daedongang District, Pyongyang North Korea
Telephone : (+850-2) 3817479, 3817911
Fax :           (+850-2) 3817622

Pakistani Embassy for Oman

Pakistani Embassy for Oman

Address           : Plot No.1747, Way No.1505 Al-Inshirah Street, Al-Ilam Height Muscat Oman
Postal Address : PO Box 1302 Muscat Oman
ZIP Code         : PC 112
Telephone         : (+968-24) 603439, 603343, 601125
Fax                   : (+968-24) 697462
Email                : parepmct@omantel.net.om
Website           : http://www.pakembassyoman.com/

Pakistani Embassy in North Korea

Pakistani Embassy in North Korea

Address :   Building #23, Block 66, Munsodong, Daedongang District, Pyongyang North Korea
Telephone : (+850-2) 3817479, 3817911
Fax :           (+850-2) 3817622

Pakistani Embassy in Yangon, Myanmar

Pakistani Embassy in Yangon, Myanmar
Pakistani Embassy in Yangon, Myanmar
Street Address :           A-4 Diplomatic Quarters Pyay Road Yangon, MyanmarPostal Address :           P O Box 581, Yangon, Myanmar
Telephone        :           (951) 222 881Fax                  :           951) 221 147Email                :           mofa.aung@mptmail.net.mm, Pakemb@mptmail.net.mm

For a negative point charge, the electric field vectors

Q-1; Multiple Choice: For a negative point charge, the electric field vectors:
w) circle the charge
x) point radially in toward the charge
y) point radially away from the charge
z) cross at infinity
ANSWER: X -- POINT RADIALLY IN TOWARD THE CHARGE

Q-2; Multiple Choice: For an infinite sheet of positive charge, the electric field lines:
w) run parallel to the sheet of charge
x) are perpendicular to the sheet of charge and point in toward the sheet
y) are perpendicular to the sheet of charge and point away from the sheet
z) fall off as one over r squared
ANSWER: Y -- ARE PERPENDICULAR TO THE SHEET OF CHARGE AND POINT AWAY

Q-2; Multiple Choice: Five coulombs of charge are placed on a thin-walled conducting
shell. Once the charge has come to rest, the electric potential inside the hollow conducting shell is
found to be:
w) zero
x) uniform inside the sphere and equal to the electric potential on the surface of the sphere
y) smaller than the electric potential outside the sphere
z) varying as one over r squared.
ANSWER: X -- UNIFORM INSIDE THE SPHERE AND EQUAL TO THE ELECTRIC OTENT

Q-3; Short Answer: A two farad and a four farad capacitor are connected in series. What
single capacitance is "equivalent" to this combination?
ANSWER: 4/3 FARADS

The force acting between two point charges can be computed using which of the following laws?

Q-1; Multiple Choice: The force acting between two point charges can be computed using which of the following laws?
w) Ohm's Law
x) Ampere's Law
y) Coulomb's Law

z) Newton's Second Law.
ANSWER: Y -- COULOMB'S LAW
.
Q-2; Short Answer: Five volts are applied across the plates of a parallel plate capacitor.
The distance of separation of the plates is .02 meters. What is the magnitude of the electric field
inside the capacitor?
ANSWER: 250 VOLTS PER METER or 250 NEWTONS PER COULOMB

Q-3; Short Answer: Used normally, a 150-watt, 120 volt light bulb requires how many
amps of current?
ANSWER: 1.25 AMPS

Q-4; Short Answer: If 10 joules of energy are required to move 5 coulombs of charge
between two points, the potential difference between the two points is equal to how many volts?
ANSWER: 2 VOLTS

Q-5; Multiple Choice: Induced electric currents can be explained using which of the
following laws?
w) Gauss's Law
x) Faraday's Law
y) Ohm's Law
z) Ampere's Law
ANSWER: X -- FARADAY'S LAW

What is the name of the first American physicist to win two Nobel prizes?

Q-1; : What is the name of the first American physicist to win two Nobel prizes?
ANSWER: (JOHN) BARDEEN

Q-2; Multiple Choice: Which of the following scientists is responsible for the exclusion
principle which states that two objects may NOT occupy the same space at the same time? Wasit:
w) Heisenberg
x) Bohr
y) Teller
z) Pauli
ANSWER: Z -- PAULI

Q-3;  Short Answer: Who shared the Nobel Prize in Physics in 1909 with Guglielmo Marconi for his contribution to the development of wireless telegraphy?
ANSWER: (CARL FERDINAND) BRAUN

Q- 4; Short Answer: Who first theoretically predicted the existence of the positron, a positively charged electron? He received the Nobel Prize in Physics in 1933.
ANSWER: (PAUL ADRIEN MAURICE) DIRAC

Q-5;  Short Answer: Name the female physicist who received the Nobel Prize in 1963 for her discovery concerning the shell structure of the nucleus.
ANSWER: (MARIA GOEPPERT) MAYER

Q-6;  Short Answer: The constant potential difference across a 2 ohm resistor is 20 volts How many watts of power are dissipated by this resistor?
ANSWER: 200 WATTS

Q-7; Short Answer: The potential difference across a 4 ohm resistor is 20 volts. Assuming
that all of the energy dissipated by this resistor is in the form of heat, how many joules of heat are radiated in 10 seconds?
ANSWER: 1000 JOULES

If the distance between two objects, each of mass 'M

Q-1; Multiple Choice: If the distance between two objects, each of mass 'M', is tripled, the
force of attraction between the two objects is:
w) 1/2 the original force
x) 1/3 the original force
y) 1/9 the original force
z) unchanged
ANSWER: Y -- 1/9 THE ORIGINAL FORCE

Q-2; Short Answer: A 40 kilogram girl climbs a vertical distance of 5 meters in twenty
seconds at a constant velocity. How much work has the girl done?
ANSWER: 2000 JOULES or 1960 JOULES
PHYS-91; Short Answer: A machine performs 8 Joules of work in 2 seconds. How much power
is delivered by this machine?
ANSWER: 4 WATTS

Q-3; Multiple Choice: In physics, a radian per second is a unit of:
w) angular displacement
x) angular velocity
y) angular acceleration
z) angular momentum.
ANSWER: X -- ANGULAR VELOCITY

Q-4; Multiple Choice: If the resultant force acting on a body of constant mass is zero, the
body's momentum is:
w) increasing
x) decreasing
y) always zero
z) constant
ANSWER: Z -- CONSTANT

A box is initially at rest on a horizontal, frictionless table. If a force of

Q-1; Short Answer: A box is initially at rest on a horizontal, frictionless table. If a force of
10 Newtons acts on the box for 3 seconds, what is the momentum of the box at the end of the 3
second interval?
ANSWER: 30 NEWTON-SECONDS or 30 KILOGRAM-METER PER SECOND

Q-2; Multiple Choice: A block of metal which weighs 60 newtons in air and 40 newtons
under water has a density, in kilograms per meter cubed, of:
w) 1000
x) 3000
y) 5000
z) 7000
ANSWER: X -- 3000

Q-3; Short Answer: A 10 kilogram body initially moving with a velocity of 10 meters per
second makes a head-on collision with a 15 kilogram body initially at rest. The two objects stick
together. What is the velocity of the combined system just after the collision?
ANSWER: 4 METERS PER SECOND

Q-4; Short Answer: A certain spring is known to obey Hooke's Law. If a force of 10
newtons stretches the spring 2 meters, how far will a 30 newton force stretch the spring?
ANSWER: 6 METERS

Q-5; Short Answer: A helicopter is ascending vertically with a constant speed of 6 meters
per second relative to the ground. At the instant the helicopter is 60 meters above the ground it
releases a package. What is the magnitude and direction of the velocity of the package, relative to
the ground, the instant the package is released by the helicopter?
ANSWER: 6 METERS/SECOND UP

A pendulum which is suspended from the ceiling of a railroad car is observed to hang at an angle of 10 degrees

Q-1; Multiple Choice: A pendulum which is suspended from the ceiling of a railroad car is
observed to hang at an angle of 10 degrees to the right of vertical. Which of the following
answers could explain this phenomena?
w) The railroad car is at rest.
x) The railroad car is accelerating to the left.
y) The railroad car is moving with constant velocity to the right.
z) The railroad car is accelerating to the right.
ANSWER: X -- THE RAILROAD CAR IS ACCELERATING TO THE LEFT.

Q-2; Multiple Choice: Two forces have magnitudes of 11 newtons and 5 newtons. The
magnitude of their sum could NOT be equal to which of the following values?
w) 16 newtons
x) 5 newtons
y) 9 newtons
z) 7 newtons
ANSWER: X -- 5 NEWTONS

Q-3; Short Answer: A ball leaves a girl's hand with an upward velocity of 6 meters per
second. What is the maximum height of the ball above the girl's hand?
ANSWER: 1.8 METERS

Q-4; Short Answer: A boy throws a ball vertically upward with a velocity of 6 meters per
second. How long does it take the ball to return to the boy's hand?
ANSWER: 1.22 SECONDS (accept: 1.2 seconds)

Q-5; Short Answer: A toy train moves in a circle of 8 meters radius with a speed of 4
meters per second. What is the magnitude of the acceleration of the train?
ANSWER: 2 METERS PER SECOND SQUARED

Q-6; Short Answer: A certain machine exerts a force of 200 newtons on a box whose mass
is 30 kilograms. The machine moves the box a distance of 20 meters along a horizontal floor.
What amount of work does the machine do on the box?
ANSWER: 4000 JOULES

A machine performs 8 Joules of work in 2 seconds. How much power is delivered by this machine?

Q1; Multiple Choice: If the distance between two objects, each of mass 'M', is tripled, the force of attraction between the two objects is:
w) 1/2 the original force
x) 1/3 the original force
y) 1/9 the original force
z) unchanged
ANSWER: Y -- 1/9 THE ORIGINAL FORCE

Q2; Short Answer: A 40 kilogram girl climbs a vertical distance of 5 meters in twenty seconds at a constant velocity. How much work has the girl done?
ANSWER: 2000 JOULES or 1960 JOULES

Q3; Short Answer: A machine performs 8 Joules of work in 2 seconds. How much power is delivered by this machine?
ANSWER: 4 WATTS

Q4; Multiple Choice: In physics, a radian per second is a unit of:
w) angular displacement
x) angular velocity
y) angular acceleration
z) angular momentum.
ANSWER: X -- ANGULAR VELOCITY

Q5; Multiple Choice: If the resultant force acting on a body of constant mass is zero, the body's momentum is:
w) increasing
x) decreasing
y) always zero
z) constant
ANSWER: Z -- CONSTANT

A box is initially at rest on a horizontal, frictionless table. If a force of 10 Newtons acts on the box for 3 seconds

Q1; Short Answer: A box is initially at rest on a horizontal, frictionless table. If a force of 10 Newtons acts on the box for 3 seconds, what is the momentum of the box at the end of the 3 second interval?

ANSWER: 30 NEWTON-SECONDS or 30 KILOGRAM-METER PER SECOND

Q2; Multiple Choice: A block of metal which weighs 60 newtons in air and 40 newtons under water has a density, in kilograms per meter cubed, of:

w) 1000

x) 3000

y) 5000

z) 7000

ANSWER: X -- 3000

Q2; Short Answer: A 10 kilogram body initially moving with a velocity of 10 meters per

second makes a head-on collision with a 15 kilogram body initially at rest. The two objects stick

together. What is the velocity of the combined system just after the collision?

ANSWER: 4 METERS PER SECOND

Q3; Short Answer: A certain spring is known to obey Hooke's Law. If a force of 10

newtons stretches the spring 2 meters, how far will a 30 newton force stretch the spring?

ANSWER: 6 METERS

Q4; Short Answer: A helicopter is ascending vertically with a constant speed of 6 meters

per second relative to the ground. At the instant the helicopter is 60 meters above the ground it

releases a package. What is the magnitude and direction of the velocity of the package, relative to

the ground, the instant the package is released by the helicopter?

ANSWER: 6 METERS/SECOND UP

Multiple Choice: Electric current may be expressed in which one of the following units?

Q-1; Multiple Choice: For the hydrogen atom, which series describes electron transitions to the N=1 orbit, the lowest energy electron orbit? Is it the:
w) Lyman series
x) Balmer series
y) Paschen series
z) Pfund series
ANSWER: W -- LYMAN SERIES

Q-2; Multiple Choice: Electric current may be expressed in which one of the following units?
w) coulombs/volt
x) joules/coulomb
y) coulombs/second
z) ohms/second
ANSWER: Y -- COULOMBS/SECOND

Q-3; Short Answer: In the SI system of measure, what is the unit of capacitance?
ANSWER: FARAD

Q-4; Multiple Choice: A Newton is equal to which of the following?
w) kilogram-meter per second
x) meter per second squared
y) kilogram-meter per second squared
z) kilogram per meter-second
ANSWER: Y -- KILOGRAM-METER PER SECOND SQUARED

Q-5; Multiple Choice: For an object moving in uniform circular motion, the direction of the instantaneous acceleration vector is:
w) tangent to the path of motion
x) equal to zero
y) directed radially outward
z) directed radially inward
ANSWER: Z -- DIRECTED RADIALLY INWARD

show how the rate of flow of volume of liquid through a long tube

By means of dimensional analysis, show how the rate of flow of volume of liquid through a long tube depends on the pressure gradient, the viscosity of the liquid and the diameter of the tube. Any other dependences can be ignored.

Solution:
We want to find a, b and c in the following equation:

 And the final answer can be written out in full:

Perhaps the most difficult part of this question would be recalling the dimensions of viscosity. Knowing an alternative equation containing would help and I leave it to the reader to find one, then it might stick.

Physics Questance And Answer

Physics Quiz Questance
1. When light bends as it enters a different medium the process is known as what?
2. A magnifying glass is what type of lens?
3. Electric resistance is typically measured in what units?
4. A person who studies physics is known as a?
5. Metals expand when heated and do what when cooled?
6. What is the first name of the famous scientist who gave us Newton’s three laws of motion?
7. What state of the art computer technology is used to train pilots when wanting to copy the experience of flying an aircraft?
8. Electric power is typically measured in what units?
9. The most recognized model of how the universe begun is known as the?
10. Who is the Hubble Space Telescope named after?
11. The wire inside an electric bulb is known as the what?
12. Theoretical physicist James Maxwell was born in what country?
13. Infrared light has a wavelength that is too long or short to be visible for humans?
14. What kind of eclipse do we have when the moon is between the sun and the earth?
15. True or false? Iron is attracted by magnets.
16. What is the earth’s primary source of energy?
17. Conductors have a high or low resistance?
18. Electric current is typically measured in what units?
19. What scientist is well known for his theory of relativity?
20. Earth is located in which galaxy?


 Physics Quiz Answers
 1. Refraction
2. Convex
3. Ohms
4. Physicist
5. Contract
6. Isaac
7. A flight simulator
8. Watts
9. Big bang
10. Edwin Hubble
11. Filament
12. Scotland
13. Long
14. A solar eclipse
15. True
16. The sun
17. Low
18. Amperes
19. Albert Einstein
20. The Milky Way galaxy