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A rifle with a mass of m1 = 3.4 kg fires a bullet with a mass of 7.7 g (0.0077 kg). The bullet moves with a velocity of 860 m/s after the rifle is fired.

the steel bed of a suspension bridge is 200m long at 20 C. If the extremes of temperature to which it might be exposed are - 30 C to 40 C, how much will it contract and expand

If systems interacts with objects outside itself. why would the momentum of the system change?

If a football player has a career thay resulys in CTE, who do you think is responsible and why

It takes 120 minutes for a man to ride his bicycle up the road to Alpe d'Huez in France. The vertical height of the climb is 1,120 m, and the combined mass of the rider and bicycle is 96 kg. What is the bicyclist's average power output, in W?

Which statements correctly describe the properties of heat? Select all that apply. Heat is an essential component of life on Earth. Heat is energy that flows from one object to another. Heat flows from a hotter object to a colder one.

A book is sitting on a table at rest. Which of the following best describes the forces acting on the book? A.

When NASA's Skylab reentered the Earth's atmosphere on July 11, 1979, it broke into a myriad of pieces. One of the largest fragments was a 1770-kg lead-lined film vault, and it landed with an estimated speed of 120 m/s.?

A spring gains 2.34 joules of elastic potential energy as it is compressed 0.250 meter from its equilibrium position. What is the spring constant of this spring? (1) 9.36 N/m (3) 37.4 N/m (2) 18.7 N/m (4) 74.9 N/m

Form hypothesis: Where do you think we humans get energy?