When a pendulum is at the midpoint of its oscillation, hanging straight down, which statement is true?
a. both kinetic energy and potential energy are at their maximum.
b. both kinetic energy and potential energy are at their minimum.
c. kinetic energy is maximum and potential energy is minimum.
d. kinetic energy is minimum and potential energy is maximum.
e. both kinetic energy and potential energy are at intermediate values.

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

Which of the following types of electromagnetic radiation has the longest wavelength? a. infrared light b. visible light c. ultraviolet light d. microwaves

One hazard of space travel is debris left by previous missions. there are several thousand masses large enough to detect by radar orbiting the earth, but there are far greater numbers of very small masses such as flakes of paint. calculate the force exerted by a 0.110 mg chip of paint that strikes a space shuttle window at a relative speed of 5.00 ✕ 103 m/s and sticks, given the collision lasts 6.00 ✕ 10-8 s. such a collision chipped the window of the ill-fated challenger in june 1983, causing $50,000 of damage.