When a simple machine multiplies force, it decreases
A) potential energy.
B) distance moved.
C) both of these
D) none of the above
Answer: B
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The condensation sequence cannot explain the composition of the terrestrial and Jovian planets
a. True b. False Indicate whether the statement is true or false
A wheel rotating about a fixed axis with a constant angular acceleration of 2.0 rad/s2 turns through 2.4 revolutions during a 2.0-s time interval. What is the angular velocity at the end of this time interval?
a. 9.5 rad/s b. 9.7 rad/s c. 9.3 rad/s d. 9.1 rad/s e. 8.8 rad/s
The cosmological principle calls for the distribution of galaxies to be homogeneous. On the large scale, is this true?
What will be an ideal response?
What temperature is required to fuse hydrogen?
A) thousands of Kelvin B) millions of Kelvin C) billions of Kelvin D) trillions of Kelvin E) any temperature, as long as gravity is strong enough