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Unpolarized light with an intensity of 760 W / m2 is incident on a polarizer with an unknown axis. The light then passes through a second polarizer with has an axis which makes an angle of 83.5° with the vertical. After the light passes through the second polarizer, its intensity has dropped to 137 W / m2. What is the angle between the axes of the polarizers?
"As a baseball is being caught, its speed goes from 30 to 0 m/s in about 0.005 s. Its mass is 0.145 kg. What is the baseball's acceleration in m/s2 and in g's
A hot ( ) lump of metal has a mass of 250g and a specific heat of 0.25 . John drops the metal into a 500g calorimeter containing 75g of water at . The calorimeter is constructed of a material that has a specific heat of 0.10 . When equilibrium is ..
What is the mass of sculpture (in kg) assume that the local acceleration due to gravity is 9.80 m/s2.
Over a year's time, a person receives a biologically equivalent dose of 21 mrem (millirems) from cosmic rays, What is the person's absorbed dose in rads
The arm of a crane at a construction site is 14.4 m long, and it makes an angle of 40° with the horizontal. Assume that the upmost load the crane can handle is limited by the amount of torque the load produces at the base of the arm.
A light rope is attached to a block with mass 4.00 kg that rests on a frictionless horizontal surface. Find the mass m of the hanging block
A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -42 µC. by how much does her mass increase
A transverse wave on a string is described by the following wave function. y =0.085 sin((pie/12x) +(5piet)), What is the speed of propagation of this wave
A wooden block with mass 0.33kg rests on a horizontal table, connected to a string that hangs vertically over a friction-less pulley on the table's edge, Find the block's acceleration if k =0.18.
The collision between a hammer and a nail can be considered to be approximately elastic. Estimate the kinetic energy acquired by a 12-g nail
A bat flying in complete darkness emits high frequency sound of 100 kHz to locate objects. What is the frequency in which the bat is received
A thin ring of radius R carries a charge 3Qdistributed uniformly over three-fourths of its circumference, and -Q over the rest
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