A boy slides a book across the floor, using a force of 5 N over a distance of 2

m. What is the kinetic energy of the book after he slides it? Assume there is

no friction.

O

A. 5J

O

O B. 2.5 J

O C. 103

O D. 20 J

The plates of a parallel-plate capacitor are 2.50 mm apart, and each carries a charge of magnitude 77.0 nC. The plates are in vacuum. The electric field between the plates has a magnitude of 3.00*106 V/m.

A potter's wheel has the shape of a solid uniform disk of mass 7 kg and radius 0.65 m. It spins about an axis perpendicular to the disk at its center. A small 2.1 kg lump of very dense clay is dropped onto the wheel at a distance 0.

What do solutions and colloids have in common A. Both are made up of only elements B. Both appear homogeneous C. Both appear heterogeneous D. Both have large particles that will settle out

What do you measure with a spring scale? A:mass in grams B:distance in inches C:weight in pounds D:distance in centimeters

If electrons of energy 12.8 ev are incident on a gas of hydrogen atoms in their ground state, what are the energies of the photons that are emitted by the excited gas?

How does mass affect the speed of an object

Which of the following tools can be used to determine humidity? Select all that apply. Barometer Hygrometers Anemometer Hair Thermometer [can use more than one answer]

For a cars speedometer what is the calculated speed over an entire trip

How does gravity influence our annual calendar?

A 0.500 kg block is sitting on a horizontal, frictionless surface. The block is connected to a horizontal spring with a force constant of 124 N/m. The other end of the horizontal spring rests against a wall. When a 100.