A shopper standing 3.55 m from a convex security mirror sees his image with a magnification of 0.275. What is the focal length of the mirror?

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

Using proper grammar, spelling, and punctuation, write at least one 5 sentence paragraph describing 3 ways we use the elements of the electromagnetic spectrum (ems) in our everyday lives.