Which statement is true about heat and light energy? A. Heat and light energy always move from colder objects to warmer ones.
B. Heat energy moves in many different directions and light energy moves in only one direction.
C. Objects do not produce both heat energy and light energy.
D. Some objects can absorb both heat energy and light energy.

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

The dot diagram represents the motion of the motorcycle as it moves from left to right

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)