Which are uses of electromagnetic waves? Check all that apply.

cooking foods

insulating buildings

using heat lamps

transmitting radio signals

using medical imaging

lighting rooms

cooling refrigerators

When the Egyptians noticed this celestial body rising before the Sun it indicated to them the coming of the Nile flood.

Which of the following are the top two job expectations of people who career plan? Select all that apply. A. Hours B. benefits C. type of work D. coworkers E. security

What is the amount of electric field passing through a surface called?

Complete the statement by filling in the blank with the correct answer. The main difference between a prokaryotic cell and a eukaryotic cell is the presence of a

Bill and Nageen have each built an electric motor and they are testing them by having them lift boxes. Bill's motor lifts a box 0.35 metres in 2 seconds. Nageen's motor lifts the same box 0.35 metres in 1.8 seconds.

Why doesn't a transformer work with direct current? why is ac required?

Which term describes the region in which an electron is most likely to be found? path cloud isotope orbital

The distance between two consecutive nodes of a standing wave is 21.9 cm. the hand generating the pulses moves up and down through a complete cycle 2.13 times every 3.65 s. find the velocity of the wave. answer in units of m/s.

Which statement is NOT true? Light travels with or without a medium Light travels faster than sound Sound must have a medium to travel through Both light and sound must have a medium to travel through

When light bends as it enters a different medium the process is known as what?