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In a lecture demonstration, a 3.0-m-long vertical string with ten bolts tied to it at equal intervals is dropped from the ceiling of the lecture hall. The string falls on a tinplate, and the class hears the clink of each bolt as it hits the plate. The sounds will not occur at equal time intervals. Why? Will the time between clinks increase or decrease near the end of the fall? How could the bolts be tied so that the clinks occur at equal intervals?
A muscle cell approximates a right circular cylinder 10 cm long and 70?m in diameter. What is the capacitance of the muscle membrane
In your four years at college you dry your hair every day for 5 minutes with a 1200w hair dryer. how much did it cost you during this time
Fluid is flowing through a pipe at a rate of 100 gal/min. The inlet pressure is 20 psig and the outlet pressure is 0 psig. At what rate [Btu/(hR)] is entropy generated
A 30-kg child rides on a circus Ferris wheel that takes her around a vertical circular path with a radius of 20 m every 22 s. What is the magnitude of the resultant force on the child
Compute the binding energy of the last neutron in the 43/20Ca Nucleus. [Hint: You must compare the mass of the 43/20Ca with the mass of 42/20Ca plus the mass of a neutron. The mass of 42/20Ca = 41.958622 u.]
a mass vibrates back and forth from the free end of an ideal spring of spring constant 20 nm with an amplitude of .3 m.
Two forces act on a block of wood. The first force has a magnitude of 8.66 N in a direction 12.0 degrees counterclockwise from the positive x-axis, What is the magnitude of the resulting force
A plate carries a charge of -4 ?C, while a rod carries a charge of 2.50 ?C. How many electrons must be transferred from the plate to the rod
The human lungs can function satisfactorily up to a limit where the pressure difference between the outside and inside of the lungs is 1/22 of an atmosphere. how far below the water can she swim
In some Rutherford scattering experiments, the alpha particles had kinetic energies of 7.7MeV
Two soccer players start from rest, 43 m apart. They run directly toward each other, both players accelerating. How much time passes before the players collide
a 2.10 x 102-n force is pulling an 85.0-kg refrigerator across a horizontal surface. the force acts at an angle of
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