Why does Refraction occur? What is Refraction?

I hand you two spheres. They have the same mass, the same radius, and the same exterior surface. I claim one is a solid sphere and the other is hollow. Can you determine which is which without cutting them open?

What best describes a transverse wave? A) The displacement of particles is opposite to the direction of wave motion. B) The displacement of particles is perpendicular to the direction of wave motion.

A wave has a wavelength of 4.9 m and a velocity of 9.2 m/s. The medium through which this wave is traveling is then heated to a greater temperature. What must be true about the frequency of this wave

Explain how a drinking straw operates when in use

2. How does the conservation of matter apply to the water cycle? 4. Explain what causes air pressure in your own words. Why do aircrafts need pressurized cabins?

The power rating of a vacuum cleaner is 0.8 kilowatts. If you use the vacuum cleaner for 2.5 hours, how much energy does it use?

Which has more gravitational potential energy - - a cliff diver at the top of the cliff or a cliff diver at the bottom of the cliff?

A skydiver with a mass of 60 kg jumps from an airplane. Five seconds after jumping the force of air resistance is 300 N. What is the acceleration of the sky diver, five seconds after jumping?

How many basic wave forms are there? A.) 1 B.) 2 C.) 3 D.) 4

How much power is reqired to lift a 10-n box 2 meters