What kind of energy is stored in compounds and released in reactions

If a 0.75kg bullet made a 3.0kg block swing to change its height 0.5 Meters, how fast was the bullet traveling? (I solved & 15.7 m/s is incorrect for some reason?)

How high can you throw a ball? What variables might affect the answer to this question?

A man weighing 750 n and a woman weighing 500 n have the same momentum. what is the ratio of the man's kinetic energy km to that of the woman kw?

Is a scientist who studies climate change. As part of a larger experiment, her work requires her to travel. Her company makes sure to send her in January, as the conditions in the area to which she is traveling are inhospitable in June.

Taylor mix two liquids together in a bakery the bakery quickly heated up what does this indicate about the reaction that took place

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?