In a heat engine, if 700 j of heat enters the system, and the piston does 400 j of work, what is the final internal energy of the system if the initial energy is 1,200 j?

A 1,100 J

B 300 J

C 1,500 J

D 900 J

On which surface (ground or marble) will thermal energy be reflected more?

Tropical winds that blow east to west

Which is an example of a solution?

A wave has a frequency of 100 Hz and a wave speed of 4.0 m/s. What is the wavelength? A. 25 m B. 0.40 m C. 0.04 m D. 400 m

Which of the following substances will show the smallest change in temperature when equal amounts of energy are absorbed? water air sand concrete

Kara is writing a science-fiction story. In the story, Earth no longer experiences day and night. To return Earth to normal, which action should the heroine of the story take? A. She should get the Sun to travel around Earth again. B.

What is the kinetic energy of a 55-kilogram skier traveling at 9.0 meters per second

A force is applied to a 2.8 kg mass and produces 3.9 m/s 2 acceleration. what acceleration would be produced by the same force applied to a 8.2 kg mass? answer in units of m/s 2.

When 2 objects collide and stick together this is referred to as

Fill in the blanks to complete each statement about the heating of Earth's surface. Earth takes in thermal energy from the Sun in a process called Sunlight strikes Earth's surface at different angles. This angle is called the angle of Done Intro