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An electrical motor spins at a constant 2675 rpm. If the armature radius is 3.49 cm, what is the acceleration of the edge of the rotor?
How various meters away is a cliff if an echo is heard 0.475 s after the original sound? Assume that sound traveled at 343 m/s on that day.
A 30 ohm resistor has a voltage difference of 3 volts across its leads. What is the power being dissapated in the resistor
A small block is released from rest at the top of a frictionless incline. The block travels a distance 0.263 m in the first second after it is released
Suppose that, because of an aneurism, the cross-sectional area, A(1), of a normal portion of a blood vessel increases to a value A(2) = 1.7A(1).
If wind blows at 32 m/s over a house, what is the net force on the roof if its area is 238 m2 and is flat
A major-league pitcher can throw a baseball in excess of 41.9 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches the catcher who is 18 m away from the point of release.
A pulse from a ruby laser (lambda = 694.3 nm) has an average power of 30 MW and lasts 2.9 ns. How many photons are emitted in this pulse
A man walks south at a speed of 2.00 m/s for 15.0 minutes. He then turns around and walks north a distance 2000 m in 15.0 minutes. What is the average speed of the man during his entire motion?
Macaroni and cheese packages specify how long to cook the pasta in boiling water. Calculate the concept relating temperature and pressure in cooking of food.
An electric charge on the x-axis oscillates sinusoidally about the origin. A distant observer is located at a point on the positive z-axis. In what direction will the electric field oscillate at the observer's location
Three people pull simultaneously on a stubborn donkey. Jack pulls directly ahead of the donkey with a force of 81.7 N, Find the magnitude of the net force the people exert on the donkey
A classical particle of mass m moves in 1 dimension and is attached to an ideal spring of spring constant mw_0^2 . Ignore friction. Take the equilibrium position of the particle to be the origin of the particle’s position x.
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