What do solar cells convert into electricity?
wind
SERE
water
sunlight
plants

What is the fate of the electrons that interact with a specimen in an electron microscope?

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.

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx