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A steel beam is placed vertically in the basement of a building to keep the floor above from sagging. The load on the beam is 6.0*10^4 N, the length of the beam is 3.0 m, and the cross-sectional area of the beam is 7.2*10^-3 m2. Find the vertical compression of the beam.
___mm
A ball of mass 0.40 kg has a kinetic energy of 28.8 J. What is the magnitude of the linear momentum of the ball
Object O1 is 15.2 cm to the left of a converging lens with a 11.8-cm focal length. What is the nature (i.e., real or virtual, upright or inverted) of the final image
A stick of mass m and length L spins with frequency w around an axis, What is the tension in the string, and what is the force that the pivot applies to the stick
A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -42 µC. by how much does her mass increase
A 0.500 kg length of copper wire is warmed 30.0°C by the passage of electrical current. How much heat was generated by the current flow
A sailboat is travelling east at 4.0 m/s. A sudden gust of wind gives the boat an acceleration a = (1.35 m/s2 30° north of east). What is the boat's speed 6.0 seconds later while the gust subsides.
You have been hired as a manufacturing engineer, What is the minimum coefficient of friction between the parts and the belt to ensure none of the parts slip when they are sped up by the belt
A 0.14 kg ball is placed in a shallow wedge with an opening angle of 126°. For each contact point between the wedge and the ball, determine the force exerted on the ball. Assume the system is frictionless.
What is the minimum uncertainly in the speed of an electron that is known to be somewhere between 0.065 nm and 0.30 nm from a proton.
Estimate the change in COP of your electric food freezer when it is removed from your kitchen to its new location in your basement, which is 8 C° cooler than your kitchen. (Assume that the temperature in the kitchen is 20°C and that the temperature o..
A 1.36 103-kg car traveling initially with a speed of 20.0 m/s in an easterly direction crashes into the rear end of a 9.00 103-kg truck moving in the same direction at 15.0 m/s. How much mechanical energy is lost in the collision
find the coefficient of kinetic friction between the slide and the child.
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