7. A stone is thrown horizontally from the top of a building, with an initial velocity of 1,000 ft/sec. At the
same instant another stone is dropped from rest.
A. Compute
the position and velocity of the latter after 3 sec. B. How
far has the first stone traveled horizontally during this
same time? C. How far has it traveled vertically? D. What
are the hor i zontal and vertical components of its velocity
after 3 sec?

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?

Rank the six combinations of electric charges on the basis of the electric force acting on q1. define forces pointing to the right as positive and forces pointing to the left as negative. rank positive forces as larger than negative forces. q1,q2,q3 = positive(+) q1 = + q2 = + q3 = - q1 = + q2= - q3= + q1= - q2= + q3= + q1= + q2= - q3= - q1,q2,q3 = negative