One of the following is a device that detects charged particles but does NOT show their tracks. Is this device the:

Q-1;  One of the following is a device that detects charged particles but does NOT show their tracks. Is this device the:

1) spark chamber
2) photographic plate
3) scintillation counter
4) bubble chamber
ANSWER: 3 -- SCINTILLATION COUNTER

Q-2; The photomultiplier tube in the scintillation counter multiplies one of the following. Does it multiply:

1) scintillations
2) electrons
3) ions
4) photons
ANSWER: 2 -- ELECTRONS

Q-3;The emission of a positron from a radioactive atom is generally accompanied by the emission of one of the following. Is it accompanied by the emission of:

1) a meson
2) a baryon
3) an antineutrino
4) a neutrino
ANSWER: 4 -- A NEUTRINO

Q-4; What term refers to the heat needed to change a unit mass of a substance at its melting temperature from a solid into a liquid?
ANSWER: HEAT OF FUSION or LATENT HEAT OF FUSION or ENTHALPY
OF FUSION