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a physics student wants to build a spring gun that when aimed horizontally will give a 35 g ball an initial acceleration of g by releasing a spring that has been compressed 11 cm. what spring constant is necessary? what is the velocity of the ball as it emerges from the gun?
It is possible to make a usable thermometer out of water. Suppose you have a 500 mL glass bottle which is filled with water at 12 C. how far up the straw does the water level move
A brass plate with a thickness of 1.00 cm is placed over a copper plate with a thickness of 2.00 cm. What is the effective coefficient of thermal conductivity for the brass - copper layer
An Elevator descended from rest on the 10th floor passing the 4th floor for a total distance of 22.5m. what was the velocity of the elevator as it passed the 4th floor
A 500 kg elevator starts from rest. It moves upward for 2.00 s with constant acceleration until it reaches its cruising speed, 1.75 m/s. What is the average power of the elevator motor during this period
A thermos contains 170 cm3 of coffee at 85° C. To cool the coffee, you drop two 14-g ice cubes into the thermos. What is the final temperature of the coffee
In a hydraulic system with a large and a small piston, you wish to lift a 1130 kg car sitting on the large piston that has a diameter of 28.2 cm, What is the diameter of the small piston
A 7-turn coil encloses a square area measuring L = 0.31 m on each side, evaluate the magnitude of the torque on the coil
A block of mass M = 5.90 kg, at rest on a horizontal frictionless table, is attached to a rigid support by a spring of constant k = 5960 N/m. find the amplitude of the resulting simple harmonic motion
Communications satellites are placed in orbits so that they always remain above the same point of the earth's surface. A) What must be the period of such a satellite? T= hr B) What is its angular velocity in rad/s?
Agree on the mass of the earth knowing that the mean radius of the moon's orbit about the earth is 248,910 mi and that the moon requires 28.32 days to complete one full revolution about earth.
Sam heaves a shot with weight 16-lb straight upward, giving it a constant upward acceleration from rest of 45.9 m/s^2 for a height 61.0 cm. How much time does he have to get out of its way before it returns to the height of the top of his head, a ..
Monochromatic light falls on a slit that is 3.50 multiplied by 10-3 mm wide. what is the frequency of the light used
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