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Calculate the fluid force (in Newtons) on a square plate with aside of 2 m that is submerged at ahorizontal angle of 30°. Assumethat the top edge of the plate is located at the surface of the water.
calculate and compare the electron densities of a piece of aluminum 1 cm thick and a piece of iron of the same density
Sunlight strikes a piece of crown glass at an angle of incidence of 40.0o. Calculate the difference in the angle of refraction between a red (660 nm) and a violet (410 nm) ray within the glass.
In Rutherford's famous scattering experiment, α particles (helium nuclei) were fired at 2.0 x 10^7 m/s over a large distance toward a gold nucleus with charge +79e. How close does the α particle get before turning around?
the magnetic field due to a current pulse in a single long straight axon nerve fiber is found to be 1.2 x 10-10 t at a
A physics professor is pushed up a ramp inclined upward at an angle 31.0 above the horizontal as he sits in his desk chair that slides on frictionless rollers. The combined mass of the professor and chair is 90.0 . He is pushed a distance 2.85along t..
An 800-N man stands halfway up a 5 m long ladder of negligible weight. The base of the ladder is 3 m from the wall as shown. suppose that the wall-ladder contact is frictionless, wall pushes against the ladder with a force of what magnitude.
A styrofoam ball of mass 0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suspended
question a 6 microc charge is found to move against a 9 kv potential difference. if the charge moves along an electric
An astronaut leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth. how long does the trip take
A block of mass 0.680 kg is pushed against a horizontal spring of negligible mass until the spring is compressed a distance x
The ratio of the mass of the earth to the mass of the moon is 81.0. Assume that the radius of the earth is about 6481.0 km and that the distance between the center of the earth and the moon is 385126.0 km.
A disk drive plugged into a 120V outlet operates on a voltage of 12V. Find the number of turns on the secondary coil
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