Which of the following statements is an accurate description of sound transmission through various mediums?

a. elastic solids prevent sound from being transmitted better than liquids.
b. inelastic materials conduct sound better than elastic solids.
c. gases conduct sound better than liquids.
d. sound insulators prevent sound from being transmitted better than elastic solids.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Oxygen undergoes an isentropic expansion from 120 degree c and 280 kpa absolute to 140 kpa absolute. determine the final temperature of the oxygen and the amount of work per kg of o_2 produced in the process if it is adiabatic.

A3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular? a 3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular?