You may have noticed that antennas are mounted vertically on cars, pretty much universally. What interaction (and what component) of the radio wave and the antenna orientation explains this uniformity?

Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 18oc and exits at 6.0 bar. the refrigerant undergoes a throttling process. determine the temperature, in oc, and the quality of the refrigerant at the exit of the expansion valve.

Acar travels 40m in 8 seconds find the car speed

If there's a small amount of friction between two surfaces, the result could be select all that applya. no movement b. heatc. a little bit of movementd. sliding around