If the acceleration vector of an object is directed anti-parallel to the velocity vector,
A) the object is turning.
B) the object is speeding up.
C) the object is slowing down.
D) the object is not moving.
E) this situation would not be physically possible.
C
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Energy Levels: Given that the binding energy of the hydrogen atom in its ground state is -13.6 eV, what is the energy when it is in the n = 5 state?
A. 2.72 eV B. -2.72 eV C. 0.544 eV D. -0.544 eV
A 10 kg bomb is moving NORTH with a velocity of 4.0 m/s. It explodes into three fragments: a 5.0 kg fragment moving WEST with a speed of 8.0 m/s, a 4.0 kg fragment moving EAST with a speed of 10 m/s, and a third 1.0 kg fragment. What is the velocity of the third fragment?
A. zero B. 40 m/s NORTH C. 40 m/s SOUTH D. none of these answers are correct
The low average densities of Jupiter and Saturn compared with Earth suggests ________.
A. they have no solid cores B. heavier elements must be in gaseous form in their interiors C. they are very hot D. they are hollow E. they contain large quantities of light elements, such as hydrogen and helium
A book can slide down a frictionless hill at constant velocity
Indicate whether the statement is true or false