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A Student (m= 75 kg) falls freely from rest and strikes the ground. During collision with the ground, he comes to rest in a time 0.040s. The average force exerted on him by the gorund is + 18000N, where the upward direction is taken to be the positive direction. From what hieght did the student fall? Assume that the only force acting on him during the collision is that due to the ground.
Two kilograms of steam at 2 MPa, 250° C are contained in a rigid vessel. How much heat must be removed from this vessel to cool it to 25° C
A compound lens system consists of two converging lenses, one at x = -20.0 cm with focal length f_1= 10.0 cm, and the other at x= 20.0cm with focal length f_2 = 8.0 cm. What is the focal length of the new lens at the origin
A plane normally takes 10 hours to travel 5, 500 miles. One day significant headwinds slow the plane down, how long will the entire trip take
an extremely long nonconducting cylinder has a radius r0. the charge density within the cylinder is a function of the
Two bodies having masses m1=30g and m2=40g are attached to the ends of a string of negligible mass and suspended from a light frictionless pulley. Find the accelerations of the bodies and the tension in the string
To water the yard you use a hose with a radius of 3.50 cm. Water flows from the hose with a speed of 1.10 m/s. If you in part block the end of the hose so the effective radius is now 0.55-cm, with what speed does water spray from the hose.
A beam of light traveling in a block of glass (n=1.60) is incident on the top surface at an angle of 55° with respect to the normal. What is the maximum possible index of refraction of the oil
A cable is lifting a construction worker and a crate, as the drawing shows. What is the tension in the cable below the worker
the work done by an external force to move a -8.40 mu c charge from point a to point b is 1.30 times 10-3 j. if the
A blacksmith cools a 1.30-kg chunk of iron, initially at a temperature of 650.0?C, by trickling 15.0?C water over it. How much water did the blacksmith trickle over the iron
In a cathode-ray tube electrons are projected horizontally at 1.5x10^6m/s and travel a horizontal distance 11.0cm across the tube. How long are the electrons in flight? Find the vertical distance the electrons fall (under the influence of gravity) du..
The flowmeter shown in the figure measures the flow rate of water in a solar collector system. what is the volume flow rate
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