Wheels emit sound waves with a wavelength of 30m what is the frequency of their calls? The speed of sound in water is 1500 m/s

The metal wire in an incandescent lightbulb glows when the light is switched on and stops glowing when it is switched off. this simple process iswhich kind of a change? a.a physical changeb. a chemical changec. a nuclear changed. an ionic change

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final