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A cardboard milk container has two holes, one above the other,punched in its side. At a given moment, the two escaping streams ofmilk strike the table the container is standing on, at the samepoint. If the heights of the upper and lower holes are 14.0 and 8.8cm respectively, find the level of the milk at that instant.
a mass m at the end of a spring vibrates with a frequency of 0.92 hz. when an additional 609 g mass is added to m the
A toy train rolls around a horizontal 1.5-m-diameter track.The coefficient of rolling friction is 0.15. What is the magnitude of the train's angularacceleration after it is released in rad/s2?
An airplane traveling at half the speed of sound emits a sound of frequency 5.12 kHz. At what frequency does a stationary listener hear the sound
what is the kinetic energy of the system. assume the roller coaster in Fig. 6-41 (h1 = 36 m, h2 = 14 m, h3 = 25) passes point 1 with a speed of 2.00 m/s. If the average force of friction is equal to one sixth of its weight, with what speed will it ..
An elevator weighing 2500 N ascends at a constant speed of 8.0 m/s. How much power must the motor supply to do this
A 839-N man stands in the middle of a frozen pond of radius 6.0 m. He is unable to get to the other side because of a lack of friction between his shoes and the ice. How long does it take him to reach the south shore
Assume that if the shear stress in steel exceeds about 4.00 108 N/m2, the steel ruptures. (a) Determine the shearing force necessary to shear a steel bolt 1.50 cm in diameter. N (b) Determine the shearing force necessary to punch a 1.50-cm-diameter h..
A person sees a distant lightning strike, then 4.5 seconds later he hears the thunder clap. If it is 35 degrees Celsius, how far away was the lightning strike
a 28000 kg rocket has a rocket motor that generates 309200 n of thrust.what is the rockets initial upward
A layer of transparent plastic (n = 1.63) on glass (n = 1.52) looks dark when viewed in reflected light whose wavelength is 576 nm in vacuum. Find out the two smallest possible nonzero values for the thickness of the layer.
A uniform electric field of magnitude 415 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 3.00 cm. What is the work done by the field on the electron
a driver involved in an accident claims he was going only 42 mph. when police tested his car they found that when his
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