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The blades in a blender rotate at a rate of 6900rpm . When the motor is turned off during operation, the blades slow to rest in 2.9s. What is the angular acceleration as the blades slow down? Express your answer using two significant figures.
Light of wavelength 520 nm passes through a slit of width 0.230 mm. How far is the screen from the slit
A football punter accelerates a football from rest to a speed of 7 m/s during the time in which his toe is in contact with the ball (about 0.16 s). what average force does the punter exert on the ball
A person of mass 72 stands at the center of a rotating merry-go-round platform of radius 3.40 and moment of inertia 950. The platform rotates without friction with the angular velocity 0.95. The person walks radially to the edge of the platform.
A tank holds a layer of oil, 1.65 m thick, which floats on a layer of syrup that is 0.83 m thick. Both liquids are clear and do not intermix. A ray, The index of refraction of the syrup is
A round pipe of varying diameter carries petroleum from a wellhead to a refinery. At the wellhead the pipe\'s diameter is 50.5 cm, what is the pipe\'s diameter at the refinery
A cylinder which is in a horizontal position contains an unknown noble gas at 5.26 × 104 Pa and is sealed with a massless piston. calculate the change in internal energy of the system
how to calculate the average velocity between to minutes. Estimate how for you can throw a ball if you throw it in the following situations.
60 cm3 of gasoline are mixed with 64 cm3 of water. What is the average density of the mixture
In a series R-L-C circuit, L=0.200 H, C=80.0 microfarads, and the voltage amplitude of the source is 240 V. What is the resonance angular frequency of the circuit
A ray of light strikes the midpoint of one face of an equiangular (60°-60°-60°) glass prism (n = 1.5) at an angle of incidence of 32.5°. find the angles of reflection at the surfaces
The velocity of a ball changes from m/s to m/s in 0.02 s, due to the gravitational attraction of the Earth and to air resistance. What is the rate of change of momentum of the ball
A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 12.0 cm, determine find the electric field just inside the paint layer
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