A 95.0kg weightlifter pushes on a 800,000 kg wall for 400s but it does not move. How much work does he do on the wall?

The SI unit for force is the newton. Which of the following is equivalent to a newton? A. kg/m B. kg·m/s2 C. kg·m/s D. kg·m/s

Who speaks the line "Lord, what fools these mortals be"? A. Mustardseed B. Puck C. Oberon D. Cobweb

Roughly how many degrees of latitude does the United States cover? Choices are A. 10 degrees B. 15 degrees C. 20 degrees D. 25 degrees

How do you calculate the rate of change of velocity

A 12 kg hanging sculpture is suspended by a 90-cm-long, 5.0 g steel wire. When the wind blows hard, the wire hums at its fundamental frequency. What is the frequency of the hum?

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?