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A cosmic ray particle has a mass in its own rest frame of 100MeV. What would be the apparent mass in the observers frame if it were travelling at 0.99c.
A pair of closely spaced parallel conducting plates, charged with equal and opposite electric charges, produces a uniform electric field in the region between them. What must the strength of the electric field be
find the coefficient of kinetic friction between the crates and the table.
on an essentially frictionless horizontal ice rink a skater moving at 4.0 ms encounters a rough patch that reduces her
A 10.39-m ladder with a mass of 24.8 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 264 N. What is the net torque acting on the ladder
a charged suphere of mass 2.8*10^-4 kg is suspended from astring. find the magnitude of electric force and the tension in the string
A box weighing 600 N is at rest on a ramp at an angle of 32.5o with the horizontal. Find the minimum force required to move the box down the ramp
A 3.00-kg block starts from rest at the top of a 30.5° incline and slides 2.00 m down the incline in 1.45 s. Find the frictional force acting on the block
The average output power of a cellular phone, which can be treated as a point of E-M waves, is 1.0W when it is "ON". Estimate the intensity of the phone's E-M waves in your brain
Under controlled darkened conditions in the laboratory, a light receptor cell on the retina of a person's eye can detect a single photon of light of wavelength 503nm, What is the intensity in (W/m^2) delivered to a rod
A 0.1-kg object is traveling to the right (in the positive direction) with a speed of 3 m/s. find the magnitude of the impulse (in N-s) acting on the object
A real object is 42.1 cm from a negative lens that has a focal length of 25.6 cm. The object is 2.45 mm high. The height and orientation of the image are
A target glider, whose mass m2 is 370 g, is at rest on an air track, a distance d = 53 cm from the end of the track. How much more time elapses before the gliders collide again
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