Which of the following expresses a principle which was initially stated by Galileo and was later incorporated into Newton's laws of motion?
a. An object's acceleration is inversely proportional to its mass.
b. For every action there is an equal but opposite reaction.
c. The natural condition for a moving object is to remain in motion.
d. The natural condition for a moving object is to come to rest.
C
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A box slides down a 25.0° slope under its own weight. The coefficient of kinetic friction between the box and the slope is 0.350. What is the acceleration of the box?
A) 1.03 m/s2 B) 2.06 m/s2 C) 1.22 m/s2 D) 2.20 m/s2 E) 2.44 m/s2
The International Space Station is orbiting at an altitude of about 370 km above the earth's surface. The mass of the earth is 5.976 × 1024 kg and the radius of the earth is 6.378 × 106 m
(a) Assuming a circular orbit, what is the period of the International Space Station's orbit? (b) Assuming a circular orbit, what is the speed of the International Space Station in its orbit?
White dwarfs are all about the same size
Indicate whether the statement is true or false
G. Easterbrook(25) has said: "The population growth for the next 2 generations is 100 percent cast in stone. Nothing short of world pestilence or a nuclear war can halt population growth for the next 2 generations.
And with the growth in the world's population that is inevitable through the next 2 generations at least, global resource consumption is going to have to rise. That's the only possible moral outcome, so that millions of people don't die in misery. We're going to have to manage a short-term drastic increase in global resource consumption. And the only way we're going to be able to get through the night with that, is with strong environmental regulations and optimism about the success of reform in technology." Agree or disagree with Easterbrook, citing specific reasons.