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A hiker, who weighs 916 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs3060 N, and rests on two concrete supports, one on each end. Hestops 1/4 of the way along the bridge. What is the magnitude of theforce that a concrete support exerts on the bridge(a) at the near end and (b) atthe far end?
Two identical small insulating balls are suspended by separate 0.22-m threads that are attached to a common point on the ceiling. Determine the tension in the threads
what did faraday and henry discover happened when a magnet was moved in a coil of wire? a a magnetic current will be
A proton that has a mass m and is moving at 280 m/s in the + direction undergoes a head-on elastic collision with a stationary oxygen nucleus of mass 16m
a dentists drill starts from rest. after 2.50 s of constant angular acceleration it turns at a rate of 2.1 104 revmin.
question a particle with a mass of 1.00 10-5 kg and a charge of 2.3 microc is released in a parallel-plate uniform
Light from a sodium lamp with a wavelength in a vacuum of 590 nm enters diamond in which the speed of light is 1.24 108 m/s. What is the wavelength of this light in diamond
When rolling a ball down an inclined plane, the ball rolls 1 cubit in ten seconds. How far will the ball have rolled from its starting point after 20 seconds
Two thin lenses with focal lengths of magnitude 15.0 cm, the first diverging and the second converging, are placed 12.00 cm apart. How far from the object is the final image formed
in a double-slit interference experiment the wavelength is 467 nm the slit separation is 0.110 mm and the screen is
A block of mass m is initially at rest on a frictionless surface. At time t = 0, an increasing force given by F = kt2 is applied to the block. Find the velocity and the displacement of the block as a function of time and graph x and v versus t.
An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0 oC and rejects heat to a room at 24.0 oC. How much energy must be supplied to the device
two blocks are sliding along a frictionless track. block a mass 4.17 kg is moving to the right at 1.60 ms. block b mass
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