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171: The gravitational potential energy of an object close to the ground varies:
w) Inversely as its distance from the ground
x) Directly as its distance from the ground
y) Inversely as the square of its distance from the ground
z) Directly as the square of its distance from the ground
ANSWER: X -- DIRECTLY AS ITS DISTANCE FROM THE GROUND
172: When the image formed by a convex mirror is compared to its object, the image is usually:
w) Erect and smaller
x) Inverted and imaginary
y) Real and inverted
z) Real and erect
ANSWER: W -- ERECT AND SMALLER
173: In optics, when the vibrations of light are limited to a single two dimensional plane, it is said that light has been what?
ANSWER: POLARIZED
174: One nanometer is equal to:
w) 10-12 meters
x) 10-11 meters
y) 10-3 meters
z) 10-9 meters
ANSWER: Z -- 10-9 METERS
175: In radioactive decay, the emission of an electron is characteristic of:
w) Alpha decay
x) Beta decay
y) Gamma decay
z) X-rays
ANSWER: X -- BETA DECAY
176: Energy is described as the capacity for:
w) Reactivity
x) Combustion
y) Transformation
z) Doing work
ANSWER: Z -- DOING WORK
177: Kinetic energy is energy of:
w) Position
x) Radiation
y) Motion
z) Formation
ANSWER: Y -- MOTION
178: The kinetic energy of a stone falling near the earth's surface through a vacuum increases with the:
w) Square root of its velocity
x) Cube root of its velocity
y) Square of its velocity
z) Cube of its velocity
ANSWER: Y -- SQUARE OF ITS VELOCITY
179: What is the mass of a 60 kilogram astronaut in space, far from any planets?
ANSWER: 60 KILOGRAMS
180: What is the weight of a 150 pound astronaut in space, far from any planets?
ANSWER: 0 POUNDS
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