What enables humans to "see" light in the infrared range of the electromagnetic spectrum? thermogram

video camera

UVsensor

RFIDchip
Exposure to what type of radiant energy is sensed by human skin as warmth?

gamma rays

ultraviolet

x-rays

infrared

A2 kg ball travellng to the right with a speed of 4 m/s collidees with a 5 kg ball traveling to the left with a speed of 3 m/s. take right to be the positive direction. what is the total momentum of the two balls before they collide? what is the total momentum of the two balls after they collide?

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.