4. At the top of a hill, a skater has a gravitational potential energy of 125J. What

is the total kinetic energy at the bottom of the hill of the skater if energy is

conserved?

A bookshelf is at rest in a room. a force of 35.0 newtons is applied to a bookshelf. if the floor imparts a frictional force of 2.90 newtons, what is the net force acting on the bookshelf?

The red light emitted by a he-ne laser has a wavelength of 633 nm in air and travels at 3.00 108 m/s. find the frequency of the laser light. answer in units of hz.

The speed of light is about 3.00 * 105 km/s. It takes approximately 1.28 seconds for light reflected from the moon to reach Earth. What is the average distance from Earth to the moon?

How to use unbalanced forces in a sentence

an electrical iron box having power 400w is operated in 10hours. what will be the energy consumed by the device in commercial unit?

Which of the following equations correctly expresses the relation between vectors A⃗, B⃗, C⃗, and D⃗ shown in the figure?

Oliver, whose mass is 65 kg, and Olivia, whose mass is 45 kg, sit 2.0 m apart in the physics classroom. What is the force of gravitational attraction between Oliver and Olivia

Which is an application of radio waves? allow doctors to see inside a person's body carry information between cell phones sterilize surgical instruments reheat or cook food quickly and easily

In history class, Juan learned about two sets of limestone carvings left in similar caves approximately 5000 years ago. Both caves are damp, but one cave has an average temperature of 45°C, while the other cave has an average temperature of 70°C.

A school bus full of students drives down the road. Because it is moving, it has 1. potential energy because it has the ability to take the students to school. 2. kinetic energy because it has the ability to take the students to school. 3.