Overnight temperatures are warmer when the air is humid because: water vapor is a good absorber of incoming shortwave radiation, causing more energy to be stored during the day. water vapor is good at scattering longwave radiation. water vapor is a good absorber of outgoing longwave radiation. water vapor and clouds cause the earth system to have a higher nighttime albedo

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

20. threshold braking in the vehicle's braking system occurs when a. the brake pedal is pushed, heel on floorboard, with full foot pressure. b. the brakes are exerting full braking power, without traction loss. c. the driver begins pushing down the brake pedal, with moderate slowdown. d. the brakes just begin to take hold with a gradual slowdown.

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane