in which of the following scenarios does acceleration occur?
a child gets on a bicycle and begins pedaling down the sidewalk.
b. awoman walks toward a grocery store then turns around and walks bac
c. a car moving up a road slows down and stops at a red light.
d. all of these

What is the relationship between the wavelength of a wave and it's energy?

Select the word from the list that best fits the definition classification of most stars on the h-r diagram

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.