Which of these waves cannot travel in a vacuum? electromagnetic wave

sound wave

microwave

light wave

Why is too much exposure to ultraviolet radiation dangerous

This is heat or electrical transfer by contact.

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

An external resistor with resistance R is connected to a battery that has an emf E and an internal resistance r. Let P be the electrical power output of the source. By conservation of energy, P is equal to the power consumed by R.

When there is a change of state, such as a solid to liquid or liquid to gas, heat energy can be added without a temperature change because A) the added energy is not needed. B) the energy is lost to the system.

A worker pushes horizontally on a large crate with force of 298 N and the crate is moved 4.3 m. How much work was done?

What would happen to the volume of a ballon left on a sunny window sill and which gas law pridict this result

An open-topped freight car with mass 24,000 kg is coasting without friction along a level track. It is raining very hard, and the rain is falling vertically downward. Originally, the car is empty and moving with a speed of 4.00 m/s.

Photons travel outward from a light bulb in

The critical angle for a beam of light passing from water into air is 48.8°. this means that all light rays with an angle of incidence in the water that is greater than 48.8° will be