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A 21 kg suitcase is being pulled with constant speed by a handle that is an angle of 25 degrees above the horizontal. If the normal force exerted on the suitcase is 170 N, what is the force F applied to the handle?
A parallel-plate air capacitor has a capacitance of 300 {\rm pF} and a charge of magnitude 0.250 \mu {\rm C} on each plate. The plates are 0.500 {\rm mm} apart. What is the surface charge density on each plate
A 150 MW laser pulse is focused with a lens to a diameter of 1.39 %u03BCm. What is the laser beam's electric field amplitude at the focal point
Two particles of mass m1 = 1.1 kg and m2 = 2.8 kg are traveling with velocities v1 = 4.5 m/s, and v2 = 2.5 m/s, What is the total momentum of this system
A horizontal circular platform rotates counterclockwise about its axis at the rate of 0.887 rad/s. Calculate the total angular momentum of the system
Suppose the space shuttle is in orbit 400 km from the Earth's surface, Find the centripetal acceleration of the space shuttle in its orbit in m/s2
A box is pushed across the floor, slide with a constant velocity, and is opposed by a friction force of 25N. What is the magnitude of the force? Choose the correct answer. A.Less than 25N B.Zero C.Greater than 25N D.25n
A hollow spherical shell with mass 2.00 kg rolls without slipping down a 38.0 degree slope, Find the acceleration of the shell
A chartered airplane flies 100 km east, then 350 km northwest, and then 150 km at 30° west of south. After an additional displacement, the plane is back where it started. Find the magnitude and the direction of the last leg of the journey.
A long straight cylindrical wire conductor of radius R carries a current I of uniform current density in the conductor. Find the magnetic field outside the wire
Monochromatic light with a wavelength of 362 nm passes through a single slit and falls on a screen 82 cm away. If the distance of the ?rst-order dark band is 0.49 cm from the center of the pattern, what is the width of the slit? Answer in units of cm
A boy in a wheelchair (total mass 51.0 kg) has speed 1.40 m/s at the crest of a slope 2.40 m high and 12.4 m long.Find the work he did in pushing forward on his wheels
A ball swings in a vertical circle at the end of a rope 1.50 mlong. When the ball is 36.9° past the lowest point on its wayup, determine the speed and velocity of the ball
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