A 50 kg boy and his 100 kg father went jogging. Both ran at a rate of 5m/s. Who had more kinetic energy

A worker pulls horizontally on a crate across a rough horizontal surface, causing it to move forward with constant velocity. Force A is the force exerted by the worker and force B is the force of friction due to the surface.

Find x-component of a⃗ = (4.5 m/s2, negative x-direction).

What is the oxidation state of beryllium

Three asteroids have exactly the same amount of mass. The distance from asteroid A to asteroid B is 200 km, the distance from asteroid B to C is 100 km, and the distance from C to A is 250 km.

The small depression inside the bend of the elbow is the

An object has a mass of 8.00 kg. What is the gravitational force on the object by the earth?

Which of the following best characterizes the free energy change ΔG for an endothermic reaction under physiological conditions? A. The sign of ΔG is positive B. The sign of ΔG is zero C. The sign of ΔG is negative D.

In a recent hockey game, one player (m=100kg) was moving at a velocity of 8 m/s when he ran into another player (m=300kg) who was at rest (v=0m/s). After the collision, the two players were stuck together (moving with the same velocity).

In a laser, electrical energy is changed to light energy, and a small amount of the energy is wasted as heat. Describe the total amount of the heat in the system (using the conservation of energy).

What is the name for a star and planets held together by gravity? A. solar system B. galaxy C. black hole D. supernova