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The magnetic field of the earth at a certain location is directedvertically downward and has a magnitude of 50.0 µT. A protonis moving horizontally toward the west in this field with a speedof 6.50*106 m/s. What are the direction and magnitude of the magnetic force the field exerts on the proton?
What is the internal resistance of a 12.0-V car battery whose terminal voltage drops to 9.5V when the starter motor draws 77A
Steam is expanded from 12.5 MPa and 900 degrees Celsius to 0.30 MPa, 400 degrees Celsius in an adiabatic turbine. Determine the power output by this turbine
A proton is projected perpendicularly into a magnetic field that has a magnitude of 0.50 T . The field is then adjusted so that an electron will follow a circular path of the same radius when it is projected perpendicularly into the field with the s..
A popular carnival ride consists of a large, round room that rotates fast enough that any person standing against the wall will be stuck there, even as the floor is dropped away from their feet. What is the room's angular speed in rpm
A plucked guitar string produces a sound wave of frequency 440 Hz. (a) What is the wavelength of the sound wave (assume the speed of sound in air is 340 m/s)? (b) How much time elapses between the impacts of two adjacent compression on your eardru..
Two very thick equally-magmetized square plates of side 0.23m and of mass 20 g, Calculate the B field between the two plates, if the distance between them is 0.123 cm
An airplane propeller is 2.08 m in length (from tip to tip)with mass 117 kg. The propeller is rotating at 2400 rev/min aboutan axis through its center. What is its rotational kinetic energy
A tiny piece of metal contains 100 magnetic spins. At room temperature, there is an equal likelihood for an individual spin to be "up" versus "down." What is the probability of finding the metal fully magnetized
A 50.0 g sample of carbon taken from the femur bone of a skeleton is found to havea carbon -14 decay rate of 410 decays/min
Water flows at a rate of 21 through a horizontal 8.0--diameter pipe under a pressure of 10.6 . At one point, calcium deposits reduce the cross-sectional area of the pipe to 28 . What is the pressure at this point? (Consider the water to be an ideal f..
A 0.25 kg skeet (clay target) is fired at an angle of 28 degrees to the horizontal with a speed of 25.0 m/s, How much higher, h, does the skeet go up
What is the radiation pressure (force/area) of a laser pointer on a heavy, highly absorbing surface? Assume that the laser has an output power of 1mW, a wavelength of 600nm, and a beam radi- us of 1mm. To do this problem, first compute the number ..
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