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You look at the center of one face of a solid cube of glass on a line of sight that makes a 55° angle with the normal to the cube face. What minimum refractive index of the glass will let you see through the cube's opposite face? Answer: n=1.83.
Two 5000 kg passenger cars roll without friction (one at 1 m/s, the other at 2 m/s) toward one another on a level track. They collide, couple, and roll away together with the combined momentum.
A scaffold that weighs 275N supports two painters, one weighing 150N and the other weighing 325N, What should the reading on the right scale be
If an piece of Iron (c = 450 J/kg C) at 65.00 C is dropped into .250 kg of ethyl alcohol at 25.00 C and the final temperature of the two comes to 35.00 C what was the mass of the piece of iron
A 58-kg water skier is being pulled by a nylon tow rope that is attached to a boat. What is the change in the length of the rope when the skier has an acceleration whose magnitude is 0.90 m/s2
what is the primary microscopic origin of the magnetic field of a magnetized piece of iron, Each atomic nucleus produces a magnetic field.
A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. what is the smallest insect a bat can detect
A thin stream of water flows smoothly from a faucet and falls straight down. At one point the water is flowing at a speed of v1 = 1.15 m/s. What is the vertical distance h between these two points
A 600 turn solenoid, 25 cm long, has a diameter of 2.8 cm. A 10 turn coil is wound tightly around the center of the solenoid. If the current in the solenoid increases uniformly from 0 to 5.0 A in 0.48 s, what would be the induced emf magnitude in the..
your car engine just died. your were moving rightward at 25 m/s, but your car slows to a rest in a distance of 120 m. what net average force was exerted on the car
A 14292 kg railroad car is rolling at 1.21 m/s when a 3365 kg load of gravel is suddenly dropped in. What is the cars speed just after the gravel is loaded
The record for the highest speed achieved in a laboratory for a uniformly rotating object was 2.01e3m/s for a 0.15m long carbon rod
A 36.0 µF capacitor is connected to a 49.0 omegacap.gif resistor and a generator whose rms output is 30.0 V at 60.0 Hz. find The rms voltage drop across the resistor.
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