A boy on a bicycle rides at 21.1 m/s a distance of 87.9 m. How long does it take?

Which of the following types of electromagnetic radiation has the longest wavelength? a. infrared light b. visible light c. ultraviolet light d. microwaves

If the area of a square has increased by a factor of 16, by how much has each side increased?

Astep up transformer has 250 turns on its primary and 500 turns on it secondary. when the primary is connected to a 200 v and the secondary is connected to a floodlight that draws 5a, what is the power output? show all of your work.