A ray of yellow sodium light enters water from air with an angle of incidence of 45°. What is the angle of refraction?

Describe the forces on an object travelling at a constant speed?

3. What statement best describes an independent variable? A. The factor that does not change, but impacts the constant in an experiment B. The factor that's changed by the experimenter and impacts the constant in an experiment C.

The sun radiates energy. Does the earth similarly radiate energy? If so, why can't we see the radiant energy from the earth? 1.

12 g of coal contains approximately 6 * 1023 atoms of carbon. How many atoms would be in 1 kg of carbon? Show your working.

Which mechanical waves needs a medium to travel through? Transverse and longitudinal waves only Longitudinal and surface waves only At mechanical waves need a medium to travel through Surface waves only

The doppler effect is the change in observed frequency due to

Which of the following is NOT a vector quantity? (A) Acceleration (B) Average velocity (C) Linear momentum (D) Potential energy (E) Force

Which of Newton's laws of motion is demonstrated by a hammer pounding a nail into a board

Heated air molecules in a hot air balloon soon carried thermal energy to the top of the balloon. this is an example of ... conduction. Convection. Radiation. Cooling.

When you are ice skating, to get started, you push your skate backwards on the ice and, as a result, begin to move forward. Which law of motion is being described in this scenario?