Which of the following technologies uses electromagnetic radiation with the longest wavelenght?

a. wireless communications transmitter

b. compact fluorescent light bulb

c. microwave industrial drying equipment

d. infrared sensor on a dvd player

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.