What describes an endothermic reaction

Which measurement can be constant (unchanging) ? A. only speed B. only velocity C. both speed and velocity

Describe some of the most important element found on earth

How much work would be required to lift a 12.0 kg mass up onto a table 1.15 meters high

Glass is called fourth state of matter. give reasons

Which part of the ear receives the signal from the eardrum?

Explain how wavelength and frequency are important when determining the type of light.

Suppose that you had an electrically charged stick. If you divided the stick in half, each half would have half the original charge. If you split each of these halves, each piece would have a quarter of the original charge.

Technician a says that when measuring a rotor's thickness variation, you should measure the rotor in a minimum of five to eight places around the face of the rotor.

What acceleration will you give to a 25kg box if you push it with a force of 85N

Lightning occurs when there is a flow of electric charge (principally electrons) between the ground and a thundercloud. assume that the rate of charge flow in a lightning bolt is about 24000 c/s and this lasts for 105 µs or less.