If you placed a cylinder with a 0.25 m radius in the middle of a record player that spins at 4.7 rad/s, what is its angular momentum? The cylinder has a mass of 2.0 kg.

Which property of potential energy distinguishes it from kinetic energy? a. mass b. shape and position c. force d. work and power

How does wavelength affect the pitch of a sound? a) the longer the wavelength the longer the sound b) the shorter the wavelength the lower the sound c) the taller the wavelength the lower the sound d) none of these

Why is there a difference in air pressure at sea level as compared to mountain tops?

You have a device that needs a voltage reference of 3.0 V, but you have only a 9.0 V battery. Fortunately, you also have several 10 k!1 resistors.

You can get sunburn on a cloudy day but you can't get a sunburn even on a sunny day if you are behind glass. explain why

An airplane flies due west (i. e. in the-X direction) between two airports. For one-quarter of the distance it travels at 650.0 km/h and the rest at 750.0 km/h. What is the average velocity (not speed) of the airplane?

1. The "Opportunity" rover that just landed on Mars transmitted music back to Earth. If the distance to Earth at the time was 9x107 km and radio waves (a kind of "light") travel with a speed of 3x108 m/s, how long did it take for the signal to reach

Precipitation is most likely occurring at A because it is located A. On a cold ocean surface B. On a warm land surface C. Near the cold front D. Near the warm front

A truck moving at 45 m/s passes a police car moving at 36 m/s in the opposite direction. if the frequency of the siren is 500 Hz relative to the police car, what is the frequency heard by an observer in the truck after the police car passes the

How do you increase the mechanical advantage of a ramp?