Blocks with masses of 7.0 kg, 8.0 kg, and 9.0 kg are lined up in a row on a frictionless table. all three are pushed forward by a 20 n force applied to the 7.0 kg block.

1. ) how much force does the 8.0 kg block exert on the 9.0 kg block?

2.) how much force does the 8.0 kg block exert on the 7.0 kg block?

Which type of circuit is becoming more common in residential electrical design and construction? a. hazardous-area circuit b. three-phase circuit c. 480-volt circuit d. communication circuit

According to social exchange theory, altruistic behaviors benefit the individual who performs them.

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)