A crane raises a crate with a mass of 150 kg to a height of 20 m. Given that the acceleration due to gravity is 9.8 m/s2, what is the crate's potential energy
at this point?
O A. 720
B. 294,000 J
O C. 29,400 J
O D. 306 J

Why are some galaxies’ spectra blueshifted rather than redshifted? question 4 options:

When temperature of a substance increases, of its particles increase resulting in more between particles. real world applications of thermal expansion absolute zero (-273 degrees c) is the lowest possible temperature on the kelvin scale. it is a measure of where a substance has no kinetic energy. heat is a process of the . energy flows spontaneously from a object to a until equilibrium is reached. heat is measured in heat is transferred throughis a method of heat transfer that occurs between particles of matter that are in direct contact with each other. are poor conductors that impede / reduce the rate of heat transfer. is a method of heat transfer that occurs in fluids (non-solids) by means of currents. real world application of convectiona method of heat transfer through electromagnetic waves. when energy moves from one object to another inside a closed system, no energy is or in the system in the transaction. systems will spontaneously move to a state of organized energy or high disorder over time called

Decreased sensitivity to an unchanging stimulus is known as