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A 25 Newton block rests on a horizontal surface. The coefficients of kinetic and static friction between the surface and the block are μk= 0.60 and μs = 0.80. A horizontal string is attached to the block and a constant tension T is maintained in the string. Find the force of friction acting on the block for each of the following value of T =15 N?
In particular, if a 2.000Å (.2nm) photon interacts with the bound electron in an hydrogen atom (binding energy 13.6 eV) with a Compton collision. What is the energy of the scattered photon
a seasoned mini golfer is trying to make par on a tricky hole 5. the golfer can complete the hole by hitting the ball
A child goes down a water slide and splashes into the water. At the top, the child has a speed of 4 m/s. how fast would the child be moving when she hits the water
a machinist is using a wrench to loosen a nut. the wrench is 25.0 cm long and the exerts a 17.0 n force at the end of
Three forces acting on an object are given by 1 = (?2.45 + 5.60) N, 2 = (5.30 ? 1.3) N, and 3 = (?42.5) N. What is the direction of the acceleration
A proposed space station includesliving quarters in a circular ring 54.5 m in diameter. At what angular speed should the ring rotate so the occupants feel that they have the same weight as they do on Earth?
Saturn has an equatorial radius of 6.00 107 m and a mass of 5.67 1026 kg. Compute the acceleration of gravity at the equator of Saturn. What is the ratio of a person's weight on Saturn to that on Earth?
A 2.00 kg disc has a 500.mm diameter. It is rotating at 200. rpm about its central longitudinal axis (like the bicycle wheel we saw in class)
batteries are rated in terms of ampere-hours a h. for example a battery that can produce a current of 2.00 a for 3.00 h
An undersea research chamber is spherical with an external diameterof 4.90 m. The mass of the chamber, when occupied, is61300 kg. What is the buoyant force on the chamber
The eardrum is displaced surprisingly little when a sound wave strikes it. Some idea of the displacement of the eardrum by a sound wave can be obtained by using Equation 7.1:The displacement amplitude, A, of the air molecules gives us a lower limi..
a model airplane with mass 0.740 kg is tethered to the ground by a wire so that it flies in a horizontal circle 30.2 m
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