If one lawn mower causes an 80-dB sound level at a point nearby, four lawnmowers together would cause a sound level of at that point. a.92 dB b.84 dB c.86 dB d. none of the above

Acup of coffee sits on the dashboard of an automobile. the car goes around a sharp curve. even though you hold the cup still, coffee still splashes out. this can best be explained due to a) density. b) friction. c) gravity. d) inertia.

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

If steel is more dense that lake water, why can a boat float