What conditions, common to most stars including our sun, appear to be necessary in order for fusion reactions to take place?

A compact car and a large truck collide head on and stick together. Which undergoes the larger change in the magnitude of momentum?

Here are three displacements, each in meters: d1 = 1.5i + 1.8j - 5.0k, d2 = - 1.0i + 2.0j + 3.0k, and d3 = 4.0i + 3.0j + 2.0k.

What is normal distribution in statistics?

Which statement below is false? A) Weight depends on the force of gravity. Eliminate B) Mass is the amount of matter in an object. C) Mass is a constant no matter where you are located. D) Weight is a constant no matter where you are located.

Why are distant objects in the universe moving away from Earth? Because the light they emit is redshifted. Because Earth's gravity pushes them away Because the universe expanding Because of a supernova event

Children in a tree house lift a small dog in a basket 4.00 m up to their house. If it takes 187 J of work to do this, what is the combined mass of the dog and basket?

What happens to the speed of the particles if the temperature is increased

A 65-year-old male enters the hospital with high blood pressure, damaged lungs, low blood-oxygen concentration, and throat cancer. What are all of these symptoms associated with?

At a certain factory, 340 kg crates are dropped vertically from a packing machine onto a conveyor belt moving at 1.00 m/s. (A motor maintains the belt's constant speed.) The coefficient of kinetic friction between belt and crate is 0.400.

A hydraulic lift is used to lift a heavy box that is pushing down on a 1.5-m2 piston with a force of 1,700 N. What force needs to be exerted on a 0.12-m2 piston to lift the box?