A resonating glass tube closed at one end is 3.6 cm wide and 31.2 cm long. What are the frequencies of the first two harmonics for the resonating tube? The speed of sound in air at this temperature is 351 m/s. Group of answer choices

2.81 Hz, 8.43 Hz

281 Hz, 562 Hz

281 Hz, 843 Hz

562 Hz, 1686 Hz

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

=force × distance a. work b. velocity c. pressure d. momentum

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