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A 7.00 N weight is raised from the ground to 1.80 m above the ground. How much work is done on the weight?
A worker uses an ideal machine to lift a 15.0 N weight is a distance of 4.50 m. He uses a force of 7.00 N. How far does the effort force move? Remember that in an ideal machine, output work is equal to input work.
An effort force of 250.0 N is applied to an ideal machine. The effort force moves an 800.0 N object a distance of 280.0 cm. What is the mechanical advantage of the machine?
It takes an electric motor 12 s to move a 450 N load a distance of 25 m. How much power is developed by the motor?
A machine requires a work input of 180 J to achieve a work output of 140 J. What is the efficiency of the machine?
A light ray of wavelength 559 nm is incident at an angleθ on the top surface of a block of polystyrene bounded by water. Discover the maximum value of θ for which the refracted ray will undergo total internal reflection at the left vertical face of t..
What is the relative speed between the rockets as measured by a passenger on one of them?
A light source, S, is located 2.60m below the surface of a swimming pool and 1.30m from one edge of the pool. The pool is filled to the top with water.
If a loop of chain is spun at high speed, it can roll along the ground like a circular hoop without collapsing. consider a chain of uniform linear mass density ? whose center of mass travels to the right at a high speed Vo. Determine the tension in t..
What is the potential difference across one wire of a 70 m extension cord made of 16 gauge copper wire carrying a current of 9 A at room temperature (20degrees Celsius)
Nate the Skate was an avid physics student whose main non-physics interest in life was high-speed skateboarding. What were Nate\'s speeds immediately before and after the collision
A beam of electrons is shot into a uniform downward electric field of magnitude 1.01 x 103 N/C. Find the magnitude and direction of the electric force
Lithium hydride, 7LiH, is a potential fuel for fusion reactors because it is one of the few compounds of very light elements that exists as a solid, and is therefore more dense than gaseous fuels even under extreme conditions
he two 0.50-kg weights of a cuckoo clock descend 1.5m in athree-day period. At what rate is gravitational potential energy decreased
A closely wound circular coil with a diameter of 4.00cm has 600 turns and carries a current of 0.500 A. What is the magnetic field at the center of the coil
An electric vehicle starts from rest and accelerates at a rate of 2 m/s2 in a straight line until it reaches a speed of 25.00 m/s. The vehicle then slows at a constant rate of 1.1 m/s2 until it stops. (1) How much time elapses from start to stop? ..
A 0.800-kg block oscillates on the end of a spring whose spring constant is k = 42.0 N/m. What is the fractional decrease in amplitude per cycle
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