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A thin beam of light enters a thick plastic sheet from air at an angle of 32.0° with the normal and continues in the sheet at an angle of 23.0° with the normal. Obtain the index of refraction of the plastic?
A plane has an airspeed of 142m/s. A 16.0m/s wind is blowing soutward at the same time as te plane is flying. what is the magnitude of that velocity
Consider two strings on a violin. They are the same length and have the same tension. What is the mass density of the second string
Figure the y-component of the magnetic force acting on a segment of wire of length L = 21.0 cm
A generator delivers an AC voltage of the form ?v = (64 V) sin (75?t) to a capacitor. The maximum current in the circuit is 1.50 A. Find the rms voltage of the generator
a 75 kg swimmer dives horizontally off a 500 kg raft. if the divers speed immediately after leaving the raft is 4 ms
A 100 cm long, 1.2 mm diameter steel guitar string must be tightened to a tension of 1700 N by turning the tuning screws. By how much is the string stretched
you send a beam of light from a material with index of refraction 1.23 into an unkown material. in order to help
The diffusion constant for the alcohol ethanol in water is 1.24 10-9 m2/s. A cylinder has a cross-sectional area of 3.95 cm2 and a length of 2.02 cm. what mass of ethanol diffuses through the cylinder
A laser used in cutting or drilling metals produces 10 ns pulses at 1.00 J per pulse. What is the peak power of each pulse
A 1.50 multiplied by 103kg car starts from rest and accelerates uniformly to 18.50m/s in 13s. Assume that air resistance remains constant at 400N during this time.
A car of mass M = 1100 kg traveling at 45 km/hour enters a banked turn covered with ice. The road is banked at an angle theta, and there is no friction between the road and the car's tires.
two long parallel wires separated by a distance d each carry a constant electric current i. find an expression for the
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