A heat engine with a high-temperature reservoir at 400 k has an efficiency of 0.20. what is the maximum possible temperature of the cold reservoir?

Volcanic mountains can only form on the ocean floor? True False

A light horizontal spring has a spring constant of 107 N/m. A 3.08 kg block is pressed against one end of the spring, compressing the spring 0.107 m. After the block is released, the block moves 0.226 m to the right before coming to rest.

What is the energy of a rock that weighs 125 n that is sitting on top of a hill 301 m high?

Amendments to the Constitution can be proposed bythe president and vice president. Congress and state legislatures. the president and the Supreme Court. Congress and the Supreme Court.

What is the difference between electromotive force and potential difference? And how does the potential difference affect the current?

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?