Which labels are correct for the regions marked? a. X: Slower in gases than liquids
Y: Faster in solids than gases
Z: Velocity depends on medium

b. X: Faster in gases than liquids
Y: Slowest in solids
Z: Faster in liquids than gases

c. X: Slower in solids than liquids
Y: Velocity depends on medium
Z: Faster in liquids than gases

d. X: Velocity depends on medium
Y: Fastest in gases
Z: Slower in liquids than solids

What makes thermal imaging cameras useful? they can detect differences in color. they can detect differences in wave speeds. they can detect differences in temperature. they can detect mechanical waves.

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e

16. a brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 n on him. the mass of the losing player plus equipment is 90.0 kg, and he is accelerating at 1.20m/s2 size 12{1 "." "20"" m/s" rsup { size 8{2} } } {} backward. (a) what is the force of friction between the losing player’s feet and the grass? (b) what force does the winning player exert on the ground to move forward if his mass plus equipment is 110 kg? (c) draw a sketch of the situation showing the system of interest used to solve each part. for this situation, draw a free-body diagram and write the net force equation.