Questions from College Physics

Q: A bug from South America known as Rhodnius prolixus extracts the blood

A bug from South America known as Rhodnius prolixus extracts the blood of animals. Suppose Rhodnius prolixus extracts 0.30 cm3 of blood in 25 min from a human arm through its feeding tube of length 0....

Q: The minimum stopping distance of a car moving at 30.0

The minimum stopping distance of a car moving at 30.0 mi/h is 12 m. Under the same conditions (so that the maximum braking force is the same), what is the minimum stopping distance for 60.0 mi/h? Work...

Q: A flat object in the xy-plane is free to rotate

A flat object in the xy-plane is free to rotate about the z-axis. The gravitational field is uniform in the −y-direction. Think of the object as a large number of particles with mass...

Q: If the total volume flow rates in systems A and C are

If the total volume flow rates in systems A and C are the same and the average flow speed in each of the pipes in C is 3.0 m/s, what is the average flow speed in system A?

Q: The operation of the Princeton Tokomak Fusion Test Reactor requires large bursts

The operation of the Princeton Tokomak Fusion Test Reactor requires large bursts of energy. The power needed exceeds the amount that can be supplied by the utility company. Prior to pulsing the reacto...

Q: If the total volume flow rate in system B is 0.

If the total volume flow rate in system B is 0.020 m3/s, what is the total volume flow rate in system C?

Q: A box of mass 42 kg sits on top of a ladder

A box of mass 42 kg sits on top of a ladder. Ignoring the weight of the ladder, find the tension in the rope. Assume that the rope exerts horizontal forces on the ladder at each end. [Hint: Use a symm...

Q: If the total volume flow rates in systems A and B are

If the total volume flow rates in systems A and B are the same, at what pressure does the pump supply water in system A?

Q: A charge Q = −50.0 nC is located 0

A charge Q = −50.0 nC is located 0.30 m from point A and 0.50 m from point B. (a) What is the potential at A? (b) What is the potential at B? (c) If a point charge q is moved from...

Q: Nina wants to lean a ladder of mass 15 kg and length

Nina wants to lean a ladder of mass 15 kg and length 8.0 m against a wall. She lifts one end over her head. Then she “walks” her hands from rung to rung toward the other end, which rests on the ground...