What is the meaning of critical angle in physics

Nickel has a face-centered cubic structure and has a density of 8.90 g/cm3. what is its atomic radius?

You have learned of two fundamental units that are not vector quantities. Which are they? mass time velocity gravity acceleration

If an object is not moving, what do we know about the forces acting on it? They are all positive. They are all negative. They are balanced. They are unbalanced.

A solid sphere of mass 8.6 kg, made of metal whose density is 3400 kg/m^3, hangs by a cord. When the sphere is immeresed in a liquid of unknown density, the tension in the cord is 38N. What is the density of the liquid?

A small box of mass m1 is sitting on a board of mass m2 and length L (Figure 1). The board rests on a frictionless horizontal surface. The coefficient of static friction between the board and the box is? s.

3. Calculate the amount of current through a 45-watt light bulb that is connected to a 120-volt circuit in your home.

Are oranges called oranges because oranges are orange, or is orange called orange because oranges are orange?

An object at rest has no net force acting on it. a. True b. False

A baseball has mass 0.145 kg. (a) If the velocity of a pitched ball has a magnitude of and the batted ball's velocity is in the opposite direction, find the magnitude of the change in momentum of the ball and of the impulse applied to it by the bat.

A long distance runner has an average speed of 4m/s during a race. How far does the runner travel in 20 minutes?