What name is given to the visible light emitted when charged particles pass through a transparent medium with a velocity exceeding the velocity of light in the medium?

Q-1: What name is given to the visible light emitted when charged particles pass through a transparent medium with a velocity exceeding the velocity of light in the medium?

ANSWER: CERENKOV RADIATION

Q-2:What element was first discovered in the spectrum of the sun before it was discovered on earth?

ANSWER: HELIUM

Q-3:A gluon is the carrier of which force of nature?

ANSWER: STRONG FORCE or STRONG NUCLEAR FORCE.

Q-4: Close inspection of a failed metal part reveals artifacts on the fracture surface commonly referred to as "striations" or "beach marks". This indicates the component failed as a result of:

1) Sudden overloading
2) Cyclical loading
3) Stress corrosion cracking
4) None of the above
ANSWER: 2 -- CYCLICAL LOADING

Q-5: How many neutrons are present in the nucleus of an element with an atomic weight of 119 and an atomic number of 50?

ANSWER: 69

Q-6: Zero degrees Kelvin is equal to what temperature on the Celsius scale?

ANSWER: - 273 DEGREES CELSIUS or -273.15 DEGREES CELSIUS

Q-7:Dirac theoretically predicted the existence of the positron. Who experimentally identified positrons in 1932 in cloud chamber pictures of cosmic ray particle tracks?

ANSWER: (C. D.) ANDERSON

Q-8:These two chemical elements, named after two world-renowned scientists, were first formed in a thermonuclear explosion which occurred in the South Pacific in 1952. The atomic numbers of these elements are 99 and 100. Their chemical symbols are Es and Fm. Name these elements.

ANSWER: EINSTEINIUM AND FERMIUM

Q-9: The dark lines constituting the absorption spectrum exhibited by sunlight are frequently called:

1) Fresnel lines
2) Fraunhofer lines
3) Fermi lines
4) Franklin lines
ANSWER: 2 -- FRAUNHOFER LINES

Q-10: The temperature of a gas measures the:

1) number of calories of heat present
2) average kinetic energy of the particles in the gas
3) exact number of particles in the gas
4) potential energy of the gas
ANSWER: 2 -- AVERAGE KINETIC ENERGY OF THE PARTICLES IN THE GAS

Q-11: If two atoms exert equal attractions for electrons, they can form:

1) a nonpolar covalent bond
2) an ionic bond
3) a polar covalent bond
4) no bond
ANSWER: 1 -- A NONPOLAR COVALENT BOND

Q-12: An element has the following numbers of electrons in its shells: 2-8-8-2. Which of the following is true? The element:

1) is a nonmetal
2) forms an ion with a charge of +2
3) can accept two electrons
4) forms a negative ion

ANSWER: 2 -- FORMS AN ION WITH A CHARGE OF +2