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A large log is located on the icy surface of a frozen pond; for this problem, the ice may be assumed to be a frictionless surface. Three ropes have been attached to the log; three boys are planning to have a sort of tug-of-war by standing on the shore of the pond and pulling on the ropes. The ropes are all horizontal. Ignore the vertical forces on the log, which are the force of gravity on the log by the Earth, and the contact force on the log by the ice. Your job is to add the three horizontal forces to find the total horizontal force acting on the log.
A converging lens has 31.3 cm focal length, and is placed 20.9 cm behind a diverging lens. Parallel light strikes the diverging lens, What is the focal length of the diverging lens in cm
rate at which mechanical energy is transferred to the turbine blades, assuming 60 percent efficiency.
A 555.0 g/hr stream of liquid methyl alcohol, also called methanol, (CH3OH) at 7.20 atm, At what rate must heat be supplied to this system
A beam of electrons is incident on two slits separated by a distance of 2.0×10-6 m. Calculate the kinetic energy of the electrons
Assume that air pressure is 1.00 atm and the air temperature is 23o C. If the abolute zero apparatus is open to the air, how many moles of air will it hold
A 0.10kg solid rubber ball is attached to the end of a 0.80 m length of light thread. The ball is swung in a vertical circle. Point p, the lowest point of the circle, is 0.20 m above the floor.
An x-ray photon of initial energy 50.0 keV Compton scatters from an electron that is initially at rest. find the wavelength of the back-scattered photon
If friction and air resistance can be neglected, determine her speed vB when she reaches the horizontal end of the ramp at B.
A typical wall outlet voltage is 120 volts in the United States. calculate the number of turns on the secondary coil of the adapter transformer
A proton accelerates from rest in a uniform electric field of 690 N/C. At one later moment, its speed is 1.30 Mm/s, What is its kinetic energy at the end of this interval
After solving a difficult physics problem, an excited student throws his book straight up. How much time does it take until the book hits the floor
Consider an RLC circuit with R = 150? , L = 597mH , and C = 0.260?F, At what frequency is this circuit in resonance
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