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261: How much energy in consumed if a 100 watt light bulb is operated for 10 MINUTES?
ANSWER: 60,000 JOULES or 60kJ or 6X104J
262: If the energy reaching your eyeball at 10 meters from a small light bulb is expressed as x, express the energy which would reach your eyeball at 20 meters?
ANSWER: (1/4) X
263: How much current does a 1500 Watt heater draw if supplied with a 120 Volt source?
ANSWER: 12.5 AMPS
264: The area of thermodynamics concerned with the measuring of thermal properties is called what?
ANSWER: CALORIMETRY
265: The temperature and pressure at which a substance can exist in all three phases of matter simultaneously is called what?
ANSWER: TRIPLE POINT
267: Refracting telescopes, if uncorrected, suffer from chromatic aberration. Chromatic aberration occurs because:
w) Red light is focused more strongly than blue light
x) Blue light is focused more strongly than red light
y) The outer light rays are focused more strongly than the central rays,
z) The central light rays are focused more strongly than the outer rays.
ANSWER: X -- BLUE LIGHT IS FOCUSED MORE STRONGLY THAN RED LIGHT
268: Which of the following scientific instruments has the greatest resolving power?
w) Electron microscope
x) Light microscope
y) phase-contrast microscope
z) Centrifuge
ANSWER: W -- ELECTRON MICROSCOPE
269: One curie is equal to:
w) The square root of the binding energy
x) The energy of an alpha-particle
y) 3.7 x 1010 disintegrations per second
z) Mc2
ANSWER: Y -- 3.7 x 1010 DISINTEGRATIONS PER SECOND
270: Isotopes of an element have different numbers of:
w) Electrons
x) Protons
y) Neutrons
z) Leptons
ANSWER: Y -- NEUTRONS
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