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A grinding wheel of radius 0.36 m, which starts from rest, rotates at 1850 revolutions per minute (RPM) and has a moment of inertia of 600 kg m2.
a. What is the angular momentum of the grinding wheel?
b. If torque (T) is defined as the change in angular momentum divided by time, how much torque is required to stop the grinding wheel in four seconds? In one second?
c. Discuss the meaning of the law of conservation of angular momentum. Your response should include the following at a minimum: How is angular momentum affected by changes to the radius of the circle or the speed of the object? How does torque affect angular momentum? What is the linear momentum equivalent of torque?
The wavelength of visible light varies from 0.40 ?m to 0.70 ?m as the color of the light changes from violet to red. Calculate the energy of a photon whose wavelength is 0.43 ?m
3 30 pound kegs are stacked on a dolley (2 on top of each other and the third on top of both of them opposite of the dolley back (they form kind of a triangle)). Calculate the force the dolley wheel exerts ON the floor
a 1.8-g balloon is filled with helium gas. when a mass of 4.8 g is attached to the balloon the combined mass hangs in
A coil of length l=50 cm and diameter d= 5 cm consists of N= 200 turns. there is a current I= 1 A running thru the coil. Determine: a) the inductance of coil; b) the magnetic flux flowing thru a cross sectional area of the coil.
Psychographics: values, lifestyles, activities, interests, opinions, VALS2 type, media habits, shopping habits, spending habits, charitable activities etc.
Engineers have developed a bathyscaph that can reach ocean depths of 5.3 mi. what is the absolute pressure at that depth
An object of mass m is dropped at time t = 0 from the roof of a building of height h. How far is the object displaced horizontally before hitting the ground? Express your answer in terms of m, g, F, and h
a star of mass 2.0 1031 kg that is 4.4 1020 m from the center of a galaxy revolves around that center once every 1.8 x
A uniform electric field of magnitude 604 N/C exists between two parallel plates that are 3.68 cm apart. Determine the distance from the positive plate
The pressure dissimilarity between the 4.0-cm-wide input end of a Venturi tube and the 2.0-cm-wide narrow constriction is measured by the difference in level of a water column in a glass U-tube, and found to be 12.7 cm.
To explain why he seems to hang in the air, compute the ratio of the time he is above ymax/2 moving up to the time it takes him to go from the floor to that height. You may ignore air resistance.
a baseball has a mass of about 155 g. what is the magnitude of the momentum of a baseball thrown at a speed of 98 miles
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