What are Ultrasonic Waves used for?

Explain how energy is transformed from the sun into biologically usable energy. include 1st and 2nd laws of thermodynamics in discussion

Two light bulbs have resistances of 400 Ω and 800 Ω. Part APart complete The two light bulbs are connected in series across a 120-V line. Find the current through each bulb. Enter your answers numerically separated by a comma. I400, I800 = 0.100,0.

There is an explosion on the surface of a lake and two people John and Nil hear its sound. John is 150m away on a boat and Nil is 150m below the surface of water. Who would hear the sound first and why?

What makes sinkholes form?

Is the Air Force better than the Navy?

Which of the following energy sources is expected to have the least growth in the next 20 years? a. hydroelectricity b. coal c. natural gas d. nonhydro renewables

A bird has a mass of 0.8 kg and flies at a speed of 11.2 m/s. How much kinetic energy does the bird have?

What is the resultant for a 5 m line running east and a 8 m line running west?

Your friend tells you that a "generator makes electricity." Do you agree or disagree with her statement? Explain why in terms the Law of Conservation of Energy.

if the ball rises with a force of 150 N, what pressure did the patient apply to his side of the tube?