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The two components of a double star are observed to move in circles of radii r1 and r2. What is the ratio of their masses?
Hint: write down their accelerations in terms of the angular velocity of rotation, omega.
The electric potential difference across the cell membrane of ahuman cell is 0.080 V, with the higher potential being outsidethe cell. In one cellular process a sodium ion Na+, with charge+e, is "pumped" through a channel in the membrane to beejected..
The Achilles tendon inserts on the calcaneus at a distance of 8cm from the axis of the ankle joint. The force generated by the muscles attached to the Achilles tendon is 3000N, and the moment arm of this force is 5cm. a) Draw a free body diagram o..
Explain by how much time is required for the bullet to reach the target? Using the approximate value of g = 10 m/s2, how far does the bullet fall in this time?
A 0.430-kg block is attached to a horizontal spring that is at its equilibrium lenght , and whose force constant is 20.0N/m. The block rests on a frictionless surface. A 0.0500-kg wad of putty is thrown horizontally at the block, hitting it with ..
a wire 4.0 m long with a mass of 20 g is under tension. a transverse wave is propagated on the wire for which the
A solenoid is wound with 470 turns on a form 4 cm in diameter and 50 cm long. What is the current in the solenoid windings
On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a 6 iron. For how much more time was the ball in flight
A major league pitcher can throw a baseball in excess of 41 m/s. If a ball is thrown horizontally at this speed, how much will it drop by time it reaches a catcher who is 17m away from the point of release.
The electric field on the axis of a uniformly charged ring has magnitude 350kN/c at a point 6.0cm from the ring center. Find the rings charge in nC
A particle of mass 4m is placed at a distance of 2.00 m from another particle of mass m. how far will that be orbiting around the earth
A ball is thrown horizontally from a 11m -high building with a speed of 2.0m/s. How far from the base of the building does the ball hit the ground
A horse draws a sled horizontally on snow at constant speed. The horse can produce a power of 1.095 hp. What is the speed with which the sled moves across the snow
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