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. 20 j

O B. 2.5 j

O c. 5 j

O D. 10 j

Suppose you take a trip that covers 180 km and takes 3 hours to make. Your average speed is A. 30 km/h. B. 60 km/h. C. 180 km/h. D. 360 km/h. E. 540 km/h.

A hollow, conducting sphere with an outer radius of 0.250 m and an inner radius of 0.200 m has a uniform surface charge density of + 6.37*10-6C/m2. A charge of - 0.500μC is now introduced at the center of the cavity inside the sphere.

What difficulties have slowed efforts to conduct controlled fusion reaction?

A small object moves along the x-axis with acceleration ax (t) = - (0.0320m/s3) (15.0s-t). At t = 0 the object is at x = - 14.0 m and has velocity v0x = 8.90 m/s. What is the x-coordinate of the object when t = 10.0 s?

Which scientist determined the nature of the forces that keep the planets in their orbits?

What trends were seen in Mendeleev's periodic table?

Through which medium would EM waves travel the fastest? A. The Ocean B. The Atmosphere C. Rocks

Average mass of a toy car (small, hot wheels) ?

A cannon directed straight upward launches a ball with an initial speed v. The ball reaches a maximum height h in a time t. Then, the same cannon is used to launch a second ball straight upward at a speed 2v.

Does the sun fuse hydrogen into helium or vice versa?