The normal force is always equal to the force of gravity
Indicate whether the statement is true or false
FALSE
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If the Sun's core suddenly shrank a little bit, what would happen in the Sun?
A) The core would heat up, fusion rates would increase, the core would re-expand. B) The core would cool off and continue to shrink as its density increased. C) The density of the core would decrease, causing the core to cool off and expand. D) The core would heat up, causing it to radiate so much energy that it would shrink even more.
A teaspoonful of neutron star material on Earth would weigh
A) about the same as a teaspoonful of Earth-like material. B) a few tons. C) more than Mt. Everest. D) more than the Moon. E) more than Earth.
A ball is thrown straight up with a speed of 30 m/s, and you can neglect the presence of air. (a) How long does it take the ball to reach the maximum height? (b) What is the maximum height reached by the ball? (c) What is its speed after 4.2 s?
What will be an ideal response?
The water level in a reservoir is maintained at a constant level. What is the exit velocity in an outlet pipe 3.0 m below the water surface?
a. 2.4 m/s b. 3.0 m/s c. 5.4 m/s d. 7.7 m/s e. 49 m/s