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

You and your friends are going to play laser tag. This game is played in a dimly lit room where you shine lasers in an attempt to tag your opponent. What color of shirt would be the most advantageous shirt to wear and why?

Five moles of an ideal monatomic gas with an initial temperature of 121 ∘C expand and, in the process, absorb an amount of heat equal to 1200 J and do an amount of work equal to 2020 J. What is the final temperature of the gas?

The shock from an electric fence would be the least unpleasant if you were standing A. on dry, thick gravel B. in tall grass C. In wet grass OD. near the livestock

Earth's temperature remains fairly steady, which means that Earth must return the same amount of energy to space that it receives from the Sun.

The rate at which current flows is measured in.

A cell provides 6 V to an LDR. The current through this LDR is measured and is found to be 3 A. What is the resistance of the LDR?

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

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?