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Prove that the ratio of depth to width of the strongest beam that can be cut from a circular log of wood having diameter d is 1.414
A disk is turning with uniform circular motion. A point on the rim of the disk is moving with velocity v1 = (1.5 m/s)i + (2.0 m/s)j at t1 = 3.00 ms, find the magnitude of the point's centripetal acceleration
When a current flows in an aluminum wire of diameter 4.97mm, the drift speed of the conduction electrons is 1.49x10^-4 m/s. What is the electron current in the wire
Describe the difference (in both what happens and why) between a person who jumps from an airplane with a parachute and one who jumps without a parachute. If a parachute is used, what would be the difference when the same size parachute is used on..
An airplane is flying with a velocity of 90 at an angle of 22 above the horizontal. When the plane is a distance 122 directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
The orbital speed of a planet about its star is 3.1× 104 m/s and its distance from the star is 1.6× 1011 m. find the magnitude of the force exerted by the star on the planet
A simple pendulum consists of a small object of mass m (the "bob") suspended by a cord of length l of negligible mass. A force F is applied in the horizontal direction (so F is Fi), Determine the work done by the gravitational force on the bob
A solenoid is designed to produce a magnetic field of 2.50 x 10-2 T at its center. What minimum number of turns per unit length must the solenoid have? What total length of wire is reuired?
During the spin-dry cycle of a washing machine, the motor speeds up from 30 rad/s to 95 rad/s, What is the magnitude of the angular acceleration of the motor
A 10 kg object is moving at 6.36 m/s. The object passes 3m over rough surface with a frictional force of 20 N. How far does the object compress the spring
Suppose we allow two mass in a one-dimensional diatomic lattice to become equal. What happens to the frequency gap? Is this answer expected? Compare the results with those of the monatomic lattice.
The current in a 1.70mm Ã? 1.70mm square aluminum wire is 1.80A. compute the electron drift speed
Gravity is the only force acting on a 2 kg mass. The potential energy of the mass increases by 144 J, What is the change in velocity of the mass
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