7. A stereo is able to convert 20% of its electrical energy into sound. If 1000 J of sound energy is produced, calculate the electrical energy used [Show all work].

8. A vehicle is only 18% efficient. How was the other 82% of the energy lost?

Scientists explain that life arose from non-life billions of years ago through the theory of abiogenesis. Could life arise from non-life today?

What is the separation at which an object in an elliptical orbit has its average speed, relative to the primary object?

The term "radiation" refers to hot materials inside the Earth rising towards Earth's surface, cooling, and sinking back down.

Rolf is comparing four solutions. solution a was placed in the fridge, which is at 4° c. solution b was placed at room temperature, which is 20° c. solution c was placed in an incubator at 37°c, and solution d was boiled at 100° c.

How hot is the surface of Uranus?

What is a magnetic field and how does it interact with magnetic materials?

What is significant about holden sitting on the radiator?

Which of the following occurs in meiosis that does not occur in mitosis 1 fertilization occur 2 body cells are made 3 sex cells are made 4 cell division occurs

A hot air balloon is hovering in the air when it drops a 40 Kg food package to some lost golfers. If the package is dropped from an altitude of 500 m and air resistance can be neglected, how fast is the package moving when it hits the ground?

you often hear people particularly TV announcers talk about "high rate of speed" what do you think they mean according to the specifics of physics definitions what are they really saying