Physics Quiz: Gravitational Potential Energy and Avogadro's Number

What force provides the rock's centripetal acceleration in the movie Return of the Jedi?

Which of the following is a scalar quantity?

A 3-cm-tall object is placed 20 cm from a converging lens with a focal distance of 10 cm. What is the height of the image?

Which of the following trigonometric functions is represented by the equation $\theta = \tan^{-1}(-\mu)$?

A block sits on a plane inclined at an angle $\theta$. If the friction force is large enough to keep the block at rest, what are the horizontal components of the friction and normal forces acting on the block?

What is the relationship between the variables in the equation $\theta = \tan^{-1}(-\mu)$?

In the first scenario, what is the gravitational potential energy of the stuntwoman relative to the ground?

How many atoms are present in 2.451 mol of iron?

In the given figure with the isosceles triangle and circles, what is the horizontal force that must be applied to keep the circles together?

In the scenario with the book against the wall, what is the limiting value of θ that prevents the book from falling?

What happens to an object's gravitational potential energy as it climbs higher against gravity?

Which formula is used to calculate work done by a force?

If a pendulum's period is 0.17 seconds on Earth, what would its period be on the Moon (where g is one-sixth of its value on Earth)?

The radius of a phosphorus atom is given as 1.10 Angstrom. What is its value in picometers?

Which ray cannot be drawn for a concave spherical mirror?

A gas is enclosed in a container with a movable piston on top. Heat is added by placing a flame at the bottom. Which statement about the gas temperature is true?

If the time of a baseball's collision with a catcher's glove is doubled, what happens to the force required to catch the ball?

A simple pendulum is raised to a higher amplitude on Earth. What happens to its total energy?