The magnetic field produced by a long straight wire carrying a current points:

Q-1: The magnetic field produced by a long straight wire carrying a current points:

1) in the direction of the current
2) toward the wire
3) away from the wire
4) circles around the wire
ANSWER: 4 -- CIRCLES AROUND THE WIRE

Q-2:What is the molecular mass of a gas that effuses through a small hole at twice the rate as oxygen gas at the same temperature. (The molecular mass of O2 is 32.)

1) 8.0 atomic mass units
2) 16 atomic mass units
3) 48 atomic mass units
4) 64 atomic mass units
ANSWER: 1 -- 8.0 ATOMIC MASS UNITS

Q-3:Liquid "X" is at equilibrium with its vapor in a cylinder and piston apparatus. When the volume of the space above the liquid is 50 ml and the temperature 25!, the vapor pressure of "X" is 120 torr. What will the vapor pressure of "X" be when the volume above the liquid is 100 ml and the temperature 25!C? Some liquid is always present.

1) 30 torr
2) 60 torr
3) 120 torr
4) 240 torr
ANSWER: 3 -- 120 TORR

Q-4: bird weighing 2 pounds is inside a completely enclosed box weighing 3 pounds. There is no air exchange between the inside and outside of the box. If the box is placed on a scale, and the bird is flying inside the box, what weight does the scale read?

ANSWER: 5 POUNDS

Q-5:Mickey is fishing from his row boat at his favorite spot in the lake. He has a large rock in the bottom of the boat for stability and ballast. Mickey decides to call it quits. To lighten his load, he tosses the rock overboard before rowing to shore. Does the water level of the lake:

1) go up
2) go down
3) remain the same
ANSWER: 2 -- GO DOWN

Q-6: An electrical discharge ionizing the air around a conductor is called:

1) Flux
2) Corona
3) Ozone
4) Field
ANSWER: 2 -- CORONA

Q-7: The speed of sound (at sea level) in air is:

1) 340 meters per second
2) 400 meters per second
3) 500 meters per second
4) 760 kilometers per second
ANSWER: 1 -- 340 METERS PER SECOND

Q-8: How many molecules are present in 2.5 liters of gas at STP?

1) 5.6 x 1024 molecules
2) 1.5 x 1024 molecules
3) 6.0 x 1023 molecules
4) 6.7 x 1022 molecules
ANSWER: 4 -- 6.7 X 1022 MOLECULES

Q-9:If 64Cu emits a beta particle, what would the product be?

1) 63Cu
2) 64Cu+1
3) 64Cu-1
4) 64Zn
ANSWER: 4 -- 64Zn