A cop car's siren has a frequency of 700. Hz. If you are standing on the sidewalk as the cop car approaches you at a speed of 15.0 m/s, what frequency would you hear? The speed of sound is 343 m/s.

Changing the current changes the "what" of an electromagnet

The net force of an object is

What does the zeroth law of thermodynamics allow us to define? A. pressure B. work C. latent energy D. thermal energy E. temperature

Steel water aluminum Think about the three words listed here. Which word could be added as the title of this list of words to tell how these words are related? A) conductors B) heat C) insulators D) metals

As a review for Newton's Laws, my teacher has assigned my class to do an egg drop test. Does anyone have any tips on what to use? So far, my group has sponges, marshmallows, air in a bag.

6. What is ductility?

During practice, a baseball player hits a very high fly ball, and then runs in a straight line and catches it. Which had the greatest displacement during the time period from the hitting of the ball to its catching

Why are glass fibers stronger than bulk glass?

1. A 2000kg truck at rest accelerates to 45m/s in 7 seconds. What is its change in kinetic energy?

The speed with which force is developed by skeletal muscles is determined by the