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At the same time a stone downward at 10 m/s from the roof of a 60 m tall building another is stone is thrown upward at 35 m/s from street level. How high above the ground are the stones when they cross paths? What is the velocity of each stone when they cross paths? (It may help to make a plot of both stones flight.)
The block is acted upon by its weight w=200lb, a horizontal force Q=600 lb and pressure P exerted by the inclined plane. The resultant R of these forces is up and parallel to the incline there by sliding the block up it. Establish P and R.
A proton is projected perpendicularly into a magnetic field that has a magnitude of 0.30 T. The field is then adjusted so that an electron will follow a circular path of the similar radius when it is projected perpendicularly into the field with t..
An alien pilot of an intergalactic spaceship, on a mission to measure the sizes of galaxies, is traveling at 0.86c relative to the galaxy A. She determines the length of the short axis of the galaxy A to be 2.9 × 1017 km.
A transparent oil with index of refraction 1.28 spills on the surface of water (index of refraction 1.33), determine the thickness of the oil slick
the displacement of a standing wave on a string is given by D = 2.8sin(0.70x)cos(55 t), Find the speed of a particle of the string
he wavelength of an electromagnetic wave inside water (nwater = 1.33) is ? = 660 nm. find the wavelength of the same electromagnetic wave
Estimate the phase difference between the sounds received by your ears when you are facing 90° away from the direction of the source
A balsa-wood raft has the following dimensions: L=2.34m , W= 1.35m , H= 0.65m. if the mass of an average person is 72.5kg, how many people can the raft safely support
They want to dock, which means they have to arrive at the same position at the same time with zero velocity. (a) What should the initial velocity of the second spacecraft be? (b) Illustrate what should be its constant acceleration?
Two forces are applied to a car in an effort to accelerate it. The first force, F1 = 328 N, is applied at an angle α = 35° to the forward dashed line. The second force, F2 = 544 N, is applied at an angle β = 8° to the forward dashed line. (a) What is..
A 1.10-mol sample of hydrogen gas is heated at constant pressure from 304 K to 422 K. Calculate the increase in its internal energy
The scale of a spring balance that reads from 0 to 15.0 kg is 12.0 cm long. How much does the package weigh
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