Nuclear reactions, such as fusion and fission, convert
A. large amounts of matter into negligible amounts of energy.

B. large amounts of energy into very small particles of matter.

C. very small amounts of energy into significant particles of matter.

D. very small amounts of matter into significant amounts of energy.

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?

Metals are good conductors of electricity because they

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 3.00 ms . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?