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A tortoise can run with a speed of 0.15 m/s, and a hare can run 20 times as fast. In a race, they both start at the same time, but the hare stops to rest for 1.0 minutes. The tortoise wins by a shell (35 cm). (a) How long does the race take? s (b) What is the length of the race?
A long solenoid has a length of 0.72 m and contains 1395 turns of wire. find the magnitude of the magnetic field within the solenoid
car a is traveling north on highway 16 and car b is traveling west on highway 83. each car is approaching the
When one gallon of gasoline is burned in a car engine, 1.19 x 108 J of internal energy is released. how many miles can the car travel on one gallon of gas
A semiconductor (GaAs) laser emitting at 800 nm has a 400 micrometer cavity length with a refractive index n=3.6. If the gaing exceeds the total loss αt throughout the range 750 nm
You throw a 20-N rock vertically into the air from ground level. You observe that when it is a height 14.5m above the ground, Use the work-energy theorem to find its maximum height
Calculate the electric field at the center of a square 53.7 cm on a side if one corner is occupied by a +38.5 µC charge and the other three are occupied by -29.4 µC charges.
A 4.3 kg rock is initially at rest at the top of a cliff. Assume that the rock falls into the sea at the foot of the cliff and that its kinetic energy is transferred entirely to the water. The specific heat of water is 4186 J/kg·?
A 22-L sample of air at 298K contains 0.10 grams of water vapor. What is the relative humidity of the air
A series RLC circuit has R= 50, L= 2.7 H, and C= 52 nF. It is connected to an AC voltage source with an rms amplitude of 12 V, find the average power dissipated by the circuit
Two children hang by their hands from the same tree branch. The branch is straight, and grows out from the tree at an angle of 33° above the horizontal. What is the magnitude of the net torque exerted on the branch by the children
A 245 kg person lays on board that is supported only on the ends and that has a mass of 12.0 kg. what is the force on either side where the board is supported
If Superman really had x-ray vision at 0.1 nm wavelength and a 4 mm pupil diameter, at what altitude could he distinguish villains from heroes, assuming he needs to resolve points separated by 6 cm to do this?
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