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A river flows with a uniform velocity v. A person in a motorboat travels 1.21km upstream, at which time she passes a log floating by. Always with the same throttle setting, the boater continues to travel upstream for another 52.6min and then returns downstream to her starting point, which she reaches just as the same log does. Calculate the velocity of the river.
On your way to class you are walking North up the oval. From Dale Hall you walk 180 m towards Nielsen Hall when you meet a friend heading the other direction.
What is the smallest radius of an unbanked (flat) track around which a bicyclist can travel if her speed is 26 km/h and the μs between tires and track is 0.34?
At a wild-west show, a marksman fires a bullet at a12 g coin that's thrown straight up into the air. At what angle measured with respect to the horizontal does the bullet ricochet away from this collision
A moving 4.50 kg block collides with a horizontal spring whose spring constant is 343 N/m. find the work done by the spring in bringing the block to rest
Starting from rest, a 2.05 kg block slides 2.86 m down a rough 32.9o incline. The coefficient of kinetic friction between the block and the incline is 0.422. Find the work done by the friction force between block and incline
A toaster draws a current os 5 amps when it is connected to a 110 volt ac line. what is the power consumption of the toaster
The surface area of an adult human is about 1.8 m^2. Suppose a person with a skin temperature of 34C is standing nude in a room where the air is 25C but the walls are 17C. What is the person's net radiation loss to the walls
A ball on a porch rolls 44 cm to the porch's edge, drops 94 cm, continues rolling on the grass, What is the magnitude of the ball's net displacement
In the process of delivering maila postal worker walks 161 meter due east from his truck.he then turns around and walked 194 meter from his truck
The kinetic energy of a proton is 80 percent of its total energy. Evaluate what is the speed of the proton
A battery has an emf of 5.9 V and internal resistance of 0.78 ?. The battery is attached to the load resistor R = 7.3 ?. Find the electric current in the circuit.
A helicopter is flying in a straight line over a level field at a constant speed of 5.50 m/s and at a constant altitude of 8.70 m. Find the initial speed of the package
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