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A 3.80 kg block is pushed along the ceiling with a constant applied force of 85.0 N that acts at an angle of 55.0° with the horizontal, as in the figure below. The block accelerates to the right at 7.50 m/s2. Determine the coefficient of kinetic friction between block and ceiling.
An elderly sailor is shipwrecked on a desert island, but manages to save his eyeglasses. What is the magnifying power of the telescope he can construct with these lenses
The light shining on a diffraction grating has a wavelength of 490 nm (in vacuum). How many lines per centimeter does the grating have
A 2.00 m brass rod with a 1.00 mm diameter is used as a spring by stretching the rod. If the tensile modulus of brass is 9.10 1010 N/m2, then the spring constant of the rod is
A solenoid that has a length equal to 24.6 cm, a radius equal to 0.842 cm, Find the magnetic flux through the solenoid
Calculate the magnitude and direction of the transverse horizontal force acting on the train
A neutral conductor completely encloses a hole inside of it. you observe that the outer surface of this conductor carries a charge of -12 microC. A) can you conclude that there is a charge inside the hole? b) how much charge is on the inner surfac..
A particle of mass m0 is given a kinetic energy equal to one-fourth its rest-mass energy. How fast must the particle be traveling
a closed Gaussian surface in the shape of a cube of edge length 2.30 m. What is the net charge contained by the cube
A large air-filled 0.247-kg plastic ball is thrown up into the air with an initial speed of 11.3 m/s. What fraction of its original energy has been lost to air friction
A diver 60 m deep in 10 C fresh water exhales a 1.5-cm-diameter bubble. find the bubble's diameter just as it reaches the surface of the lake
Find the number of revolutions that the wheel turns before it stops(and begins to turn in the opposite direction).
A 54.0kg skateboarder wants to just make it to the upper edge of a "quarter pipe," a track that is one-quarter of a circle with a radius of 3.90m
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