The astronaut's experiment with the hammer and the feather illustrate that:
a. hammers and feathers have the same mass on the Moon.
b. hammers and feathers have the same weight on the Moon.
c. objects of different size, shape, and mass fall at the same rate in a vacuum.
d. the absence of air on the Moon results in different rules of physics.
e. there is no gravity on the Moon.
Question 2
In his experiment with rolling balls down a ramp at different ramp angles, what did Galileo discover?
a. For any fixed ramp angle, the speed of a ball was always constant, regardless of its weight.
b. For any fixed ramp angle, the acceleration of a ball was always constant, regardless of its weight.
c. For any fixed ramp angle, the velocity of a ball was always constant, regardless of weight.
d. The velocity and acceleration were both constant.
e. The heavier balls rolled down the ramp faster.
Emphysema. (a) Illustration comparing normal lungs and emphysemic lungs. The inserts illustrate how
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