What is the role of the part in the diagram labeled X?
O modulate, amplify, and send out waves
O capture, amplify, and demodulate waves
o change the amplitude and frequency of waves
change the pulse and phase of waves

Animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. reactivate d) a dog is getting hot in the sunlight, so he moves to a shaded area.

Calculate the heat capacity per object when the total energy is 4 quanta. (think of this in terms of increasing from 3.5 quanta of energy in the system to 4.5 quanta of energy in the system, if that were possible.) c4 = __ j/k/object

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?