A student is standing 8 m from a roaring truck engine that is measured at 20 dB. The student moves 4 m closer to
the engine. What is the measured sound intensity at the new distance?
dB

Air flows upward in the wick of a lantern because of the liquid property called

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Astudent pushes on a 20.0 kg box with a force of 50 n at an angle of 30° below the horizontal. the box accelerates at a rate of 0.5 m/s2 across a horizontal floor. what is the value of the normal force on the box? 200 n 243 n 156 n 225 n