Which type of wave was used in telegraphs to communicate in Morse code?

A ray of light passes from air into a block of clear plastic. How does the angle of incidence in the air compare to the angle of refraction in the plastic?

Which theory does Young's double-slit experiment most effectively illustrate?

An alloy of gold and silver has a mass of 1050g and a volume of 60cm cubic. if the density of gold is 19.3g/cm cubic and that of silver is 10.5g/cm cubic. Find the mass of gold

why does carrying furniture up four flights of stairs require twice as much work as caring furniture up two flights of stairs

During the first 5 seconds after a ball is dropped from rest, how far will it fall?

Which branch of science includes the laws of matter and energy?

A very famous motorcyclist plans to jump across a canyon 3.5 kilometers wide. he plans to use a 30 degree ramp and leaves it at 196 m/s. Will he make it? show all calculations to prove your answer

What captures energvy from sunlight during photosynthesis

The scientific theories developed by copernicus galileo and newton resulted in

How could you find out which wire is broken in a cable?