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The concrete dam of Fig. P2.110 weighs 23.6 kN/m3 and rests on a solid foundation. Determine the minimum coefficient of friction between the dam and the foundation required to keep the dam from sliding at the water depth shown. Assume no fluid uplift pressure along the base. Base your analysis on a unit length of the dam.
Two small metallic spheres, each of mass 0.20 g, are suspended as pendulums with light strings from a common point as shown in the figure below. The spheres are given the same electric charge; and it is found that they come to equilibrium when each s..
A constant force of 115 N directed upward is applied to a 4.0 kg toy rocket by the rocket's engine. What is the rocket's acceleration
Heat is transferred from one place to another when higher kinetic energy molecules collide with lower kinetic molecules. What is this process is called?
Ground beef may be irradiated with high-energy electrons from a linear accelerator to kill pathogens. In a standard treatment, 2.0 kg of beef receives 4.5 kGy of radiation in 48 s. (A) How much energy is deposited in the beef in kJ? (B) What is the a..
The loaded cab of an elevator has a mass of 3.0 x 10^3 kilogram and moves 210 meter up the shaft in 23 second at a constant speed. Find at what average rate does the force from the cable do work on the cab
You are a delivery person for the Fresh Aqua Spring Water Company. Your truck carries 3 pallets. How many full cases of water can you carry on the cart
A metallic sphere 1 of radius 1.00 cm is far away from a metallic spherical shell 2 of radius 2.00 cm. Charge 450 nC is placed on 1, with no charge on 2 or anywhere nearby. Next, the two objects are joined by a long, thin, metallic wire (as shown…..
in a game of pool the cue ball strikes another ball of the same mass and initially at rest. after the collision the cue
You are assigned the design of a cylindrical, pressurized water tank for a future colony on Mars, where the acceleration due to gravity is 3.71 meters per second per second. Find the net downward force on the tank's flat bottom
Suppose you are given a 115 V motor that draws 6.5 A at its normal (steady-state) speed, but 21.5 A when it first starts. What is the back emd of the motor in V
A 2.3 box, starting from rest, is pushed up a ramp by a 10 force parallel to the ramp. The ramp is 2.0long and tilted at 17 . The speed of the box at the top of the ramp is 0.80 .
A 1 kg ball is attached to a 2 m long piece of very light string and suspended in such a way that it can freely swing and it passes just above the ground. completely describe the motion of the two masses after the 1 kg ball is released
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