What radiant energy is sensed by human skin as warmth

Why does the total amount of energy before and after any energy transformations remain the same? answer : Because energy cannot be created or destroyed, the total input is equal to the total output.

The ball shown below is accelerating at a rate of 10 m/s2. The ball's mass is 5 kg. What is the net force on the ball? F net =? A. 2 N B. 5 N 15 N D. 50 N

A fellow student of mathematical bent tells you that the wave function of a traveling wave on a thin rope is y (x, t) = 2.30mmcos[ (6.98rad/m) x + (742rad/s) t]. Being more practical-minded, you measure the rope to have a length of 1.

What is produced during the replacement reaction of Ba (NO3) 2 and Na2SO4

Which one of the following accurately pairs the device with its function? A: Bourdon gage-indicate steam pressure in a furnace. B: manometer-determine the specific gravity of a liquid.

A book falls of the table and hits the floor. Is work done? Why?

A person of 83 kg is in an elevator. If the elevator is moving at a speed of 5 m/s, what's the person's kinetic energy? Keep 4 significant figures a 1,004 J b 1,038 c 1,280 J d 980 J e 1,435 J

What two equations can be used to determine the speed of a wave

Which force has an infinite range and is always attractive?

A ramp with a mechanical advantage of 8 lifts objects to a height of 1.5 meters how long is the ramp