What can electromagnetic waves travel through?

Calculate the potential energy of a 4 kg cat crouched 3 meters off the ground

Low-frequency red light is used in dark rooms because it does not expose the film. This is because the red light has a low

Lenses are described as convergent or divergent depending on how they refract light. What is the difference between these two types of lenses?

What forms when constructive and destructive interferences occur at the same time in a wave

What are conduction, convection and radiation?

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?

A uniformly charged conducting sphere of 1.1 m diameter has a surface charge density of 6.2 µC/m2. (a) Find the net charge on the sphere. (b) What is the total electric flux leaving the surface of the sphere?

A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 12 A, while that of the vacuum cleaner is 5.7 A. Determine the power consumed by (a) the blow-dryer and (b) the vacuum cleaner.

4. A 40 kg child and a 30 kg child want to balance themselves on a 4 meter, 50 kilogramn see-saw. Where should the fulcrum be placed?