Which of the following statements about how sound waves travel is correct?
A
Sound waves travel faster through solids than through liquids.
B
Sound waves travel faster through gases than through solids.
C
Sound waves travel fastest through liquids and the slowest through solids.
D
Sound waves travel the fastest through gases and the slowest through liquids.

How would you place two electrons on a sphere of radius r so that the electrostatic potential energy is minimized. how would you place three electrons to solve the same problem.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j.b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

It takes a lot of energy to get the temperature of water to increase and eventually boil because water has a high heat.