Which is an example of a polyatomic ion?

H2

CO3-

Mg+

Ne + -

A professional cyclist rides a bicycle that is 92 percent efficient. For every 100 joules of energy he exerts as input work on the pedals, how many joules of output work are used to move the bicycle?

It takes an object 2 minutes to speed up from 67 m/s to 528 m/s the acceleration is

consider a 2kg bowling ball sits on top of a building that is 40 meters tall. it falls to the ground. think about the amounts of potential and kinetic energy the bowling ball has

Is gravity internal force or external force?

A 0.5 kg ball moving at a speed of 3m/s rolls up a hill. How high does the ball roll before it stops

What is cell in electricity?

When a siren is approaching you, how does the wavelength of the waves reaching you compare to the actual wavelength that the siren emits?

In a harbor, you can see sea waves traveling around the edges of small stationary boats. Why does this happen?

Correct unit of speed

Technician A says that for best results, loosen the fastener immediately after spraying it with penetrating oil. Technician B says that rusted fasteners may be loosened by tapping with a hammer. Which technician is correct? a. technician A only b.