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1. Determine the minimum cross sectional area the cable shown must have if the allowable stress in the cable is 10,000 psi. Check both lengths AC and CD and let the most critical portion control the size for the whole length ACD.
2. The steel specimen shown is used in a tension test. At what load P will the mechanical gauge read 0.002-in. deformation? Assume E = 30 x 106 psi.
3. A round bar is made up of steel, aluminum and copper. Determine the radius of each portion necessary in order to carry the given load, if the allowable stresses in the steel, aluminum and copper are 20,000, 10,000 and 5,000 psi respectively.
4. A surveyor's chain, 100-ft standard length, is 0.24 inches longer because of an increase in temperature. Determine the average thermal strain for this chain.
A 50.0 ball of clay traveling east at 8.00 collides and sticks together with a 40.0 ball of clay traveling north at 8.00. Illustrate what is the speed of the resulting ball of clay?
A 85-tonne (1 t = 1000 kg) spacecraft moving in the + x-direction at 0.38m/s docks with a 70-tonne craft moving in the -x-direction at 0.62m/s
1. explain why at least two photons are created during pair annihilation.2. how does the wavelength of a photon
A car with fuzzy dice hanging from the rear view mirror by a single string drives along at a constant 25.0 m/s. If the dice have a mass of 0.030 kg, what is the angle of the string (relative to vertical)
A cannon fires a cannonball from the top of a wall at a speed of 91.05 m/s and an angle of 31.18 degrees from the horizontal. What is the horizontal distance from the wall where the fired cannonball hits the ground
a rocket initially at rest on the ground accelerates straight upward from rest with constant acceleration 29.4 ms2. the
Starting from rest, a hammer thrower performs 4 revolutions in 4 seconds before releasing the hammer. What is the centripetal acceleration needed to rotate the hammer
A 1.15-k Ω resistor and a 600-mH inductor are connected in series to a 1500-Hz generator with an rms voltage of 15.0V. What is the rms current in the circuit
An object of mass 15 kg falls from a height of 8.0 m above the ground. What will be its speed and kinetic energy when it hits the ground
For a movie scene, a 71kg stuntman drops from a tree onto a 48kg sled that is moving on a frozen lake with a velocity of 12m/s toward the shore. obtain the speed of the sled after the stuntman is on board
The increase in the kinetic energy of the box
What is least amount of work required by an external force
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