20. which of the following statements is an accurate description of sound transmission through various mediums? a. sound insulators prevent sound from being transmitted better than elastic solids. b. gases conduct sound better than liquids. c. inelastic materials conduct sound better than elastic solids. d. elastic solids prevent sound from being transmitted better than liquids.

The ph is the a.independent variable b.the dependent variable c.control group

Adisk with a radius of r is oriented with its normal unit vector at an angle q with respect to a uniform electric field. which of the following would result in an increase in the electric flux through the disk? check all that apply? a. increasing the area of the disk b. decreasing the given orientation angle of the disk c. decreasing the strength of the electric field d. increasing the given orientation angle of the disk, but not exceeding an angle of 90

Two masses are connected by a rope that hangs over a pulley as shown below. the pulley is a uniform cylinder of radius 푅=0.381meters and mass 푀=3.1푘푔. initially 푚"is on the ground and 푚#rests 2.5 meters above the ground. if the system is released, use conservation of energy to determine the speed of 푚#just before it strikes the ground. assume the pulley bearing is frictionless.