You pull horizontally on a 50-kg crate with a force of 450 n and the friction force on the crate is 250 n. the acceleration of the crate is

Using the example of the skateboarder on the half-pipe, explain how kinetic and potential energy relate to the mechanical energy at different positions.

To create "dry ice," manufacturers compress and cool carbon dioxide gas until it solidifies. Describe what happens to the carbon dioxide molecules as the gas is compressed and cooled.

in a race, Usain Bolt accelerates at 1.99m/s^2 for the first 60.0m, then decelerates at - 0.266m/s^2 for the final 40.0m. what was his final velocity? (Unit = m/s)

Mary is trying to determine the charge of an object in the lab. She observes that it is repelled by a positively charged rod. What can you say about the charge of the object?

An electric generator contains a coil of 99 turns of wire, each forming a rectangular loop 73.9 cm by 34.9 cm. The coil is placed entirely in a uniform magnetic field with magnitude B = 2.96 T and initially perpendicular to the coil's plane.

What causes physical vibrations in transformers at twice the frequency of the AC power involved.

Projectile motion is a combination of which two types of motion? parabolic and curved straight and diagonal horizontal and vertical constant and linear

If a mass of a material is 100 grams and the volume of the material is 15 cm3, what would the density of the material be?

After three half-lives of an isotope, 1 billion (one-eighth) of the original isotope's atoms still remain in a certain amount of this element. How many atoms of the daughter product would you expect to be present?

A group of two or more stars is called a A. solar system B. neutron star C. protostar D. star system