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A runner with the weight of 686.7 N accelerates at a constant rate from 0 to 45 m/s in the first 2 seconds of a 100 m sprint. What is the net force?
Two carts with masses of 4.5 kg and 3.9 kg move toward each other on a frictionless track with speeds of 5.6 m/s and 4.3 m/s, respectively. The carts stick together after colliding head-on.
A very large cylindrical tank vented to air contains a layer of oil on top of water. At the bottom of the container there is a horizontal pipe of very small radius, What is the unknown thickness of oil in the tank
Kahlinium is an H-like atom consisting of an electron and the positive Casimir particle, what would be the wavelength of the first line of the Lyman emission series for this atom
Below are birds-eye views of six identical toy cars moving to the right at 2? Various forces act on the cars with magnitudes and directions indicated below. All forces act in the horizontal plane and are either equivalent or at 45 or 90 degrees to ca..
Mabel walks down a straight hall from a bench to the door of her spanish class at a rate of 1.4m/s for 28 s, then she realizes she forgot her folder. Compute Mabel's average speed
A 34-kg girl is bouncing on a trampoline. During a certain interval after she leaves the surface of the trampoline, How high does she rise during this interval
The loaded cab of an elevator has a mass of 3x10^3 kg and moves 177m up the shaft in 23 s at constant speed. At what average rate does the force from cable do work on the cab.
A 60-kg runner expends 295 W of power while running a marathon. determine the mass of bodily fluid (assume it is water) lost per hour
The coefficient of kinetic friction
Pool players often pride themselves on their ability to impart a large speed on a pool ball. At what speed did his pool ball hit the ground
The electric field midway between two equal but opposite point charges is 730 N/C, What is the magnitude of the charge on each
After the collisions the clay-rod system has an angular velocity ω about the pivot. With respect to the pivot point O, elucidate the magnitude of the initial angular momen-tum Li of the clay-rod system?
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