If you are use night-vision goggles, what part of the spectrum are you detecting?

pls helppp

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

Ahockey player of mass 82 kg is traveling north with a velocity of 4.1 meters per second he collides with the 76 kg player traveling east at 3.4 meters per second if the two players locked together momentarily in what direction will they be going immediately after the collision how fast will they be moving

It takes a lot of energy to get the temperature of water to increase and eventually boil because water has a high heat.