After an initial push, a sled begins to move downhill at 1 m/s. A few seconds later its kinetic energy has increased. The sled now has 64 times more kinetic energy than it did right after the push. How fast it it going?

For a batter to increase momentum at the plate, he/she can? Choose a lighter bat Choose a heavier bat Choose an aluminum bat Choose a wooden bat

What mass of electrons would be required to just neutralize the charge of 5.0 g of protons? (the mass of a proton is 1.67262*10-24g, and the mass of an electron is 9.1*10-28g.) ?

When conduction electrons pass through a device with resistance, which describes their energy? a) their potential energy increases. b) their kinetic energy increases c) their potential energy decreases d) their kinetic energy decreases

In a chosen coordinate system, the position of an object in motion can have negative values?

Which causes the thermocline? A. The sun's radiation heats the surface waters, which descend to the depths and bring colder water to the surface. B. The sun's radiation heats equatorial waters more than polar waters. C.

A carnot engine rejects 80 mj of energy every hour by transferring heat to areservoir at 10°c. determine the temperature of the high-temperature reservoir and the power produced if the rate of energy addition is 40 kw.

When monochromatic light passes through the interface between two unknown materials at an angle θ where 0∘<θ<90∘, no changes in the direction of propagation of light are observed. What can be said about the two materials? A.

An object has a force of 10 newtons from the right and 17 newtons from the left. Once the object starts moving toward the right, an additional force of 7 newtons is applied from the right.

A basketball player, who weighs 600 newtons, jump 0.5 meters vertically off the floor. Calculate her kinetic energy just before hitting the floor. a) 300J b) 3000J c) 9.81m/s^2 d) 0

What are three physical properties of helium