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A boat takes 4 h to travel 30 kilometer down a river, then 8 h to return. Evaluate how fast is the river flowing?
km/hr
A 0.20 kg block on a vertical spring with a spring constant of 5 multiplied by 103 N/m is pushed downward, compressing the spring 0.090 m. When free, the block leaves the spring and travels upward vertically. How high does it rise above point of r..
A block in the shape of a rectangular solid has a cross-sectional area of 4.48 cm2 across its width, a front-to-rear length of 22.1 cm, find the magnitude of the electric field in the block
a burst of mesons travel down an evacuated beam tube at fermilab at beta .92 with respect to the laboratory.a compute y
A large boat with a weight of 70000 tons moves at constant speed due west. What is the net force on the boat.
a 5.82-kg object passes through the origin at time t 0 such that its x component of velocity is 5.30 ms and its y
A 1200-turn coil of wire that is 2.1 cm in diameter is in a magnetic field that drops from 0.14 T to 0 T in 12 ms. What is the emf of the coil
A can of sardines is made to move along an x axis from x = 0.36 m to x = 1.40 m by a force with a magnitude given by F = exp(-4x), How much work is done on the can by the force
q1. a race car has the mass of 702 kg. it starts from rest and travels 45.0 m in 3.0 s. the car is uniformly
A uniform plank, 10.0 m long and weighing 200 N, is supported horizontally by a brick at one end and an egg at the other. What is the force exerted on the plank by the brick
A child pushes a 5 kilogram machine along a horizontal floor with a force, P, which makes an angle, theta=30o below the horizontal. find the acceleration of the machine while in motion
A thin, hollow 60.0 g section of pipe of radius 10.0 cm starts rolling (from rest) down a23.5° incline 5.40 m long. If the pipe rolls without slipping, what will beits speed at the base of the incline
A 14-g bullet is fired horizontally into a 110-g wooden block that is originally at rest on a frictionless horizontal surface and connected to a spring having spring constant 169 N/m. The bullet becomes embedded in the block. The bullet-block system ..
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