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a water rocket, launched from the ground, rises verticallywith acceleration of 30 /s2 for 1 s when it runs out of fuel. Disregarding air resistance, how high will the rocket rise?
When a train's velocity is 12.0 m/s eastward, raindrops that are falling vertically with respect to the earth make traces that are inclined 30.0 degree to the vertical on the windows of the train. What is the horizontal component of a drop's veloci..
A television repairman needs a 100 ohm resistor to repair a malfunctioning set. He is temporarily out of resistors of this value. How can he obtain the desired resistance using the resistors he has on hand
Bicyclists in the Tour de France do enormous amounts of work during a race. How much work does he do during a 177-km race in which his average speed is 12.7 m/s
In the figure below, a “semi-infinite” nonconductingrod (that is, infinite in one direction only) has uniform linearcharge density λ = 5.0 μC/m.Find (a) the component of electric fieldparallel to the rod and (b) thecomponent perpendicular to the rod ..
A body of mass 200 g is acted upon by a force of 20 n. Find the acceleration of the body. If the body above is having a volume of 1000 cm3 estimate its density in kg/m2.
an officer sending men to the moon by firing a space capsule from a 220 m long cannon with final speed of 10.97 kms.
The safe slides with a constant speed if Clyde pushes from behind with 405 N of force while Bonnie pulls forward on a rope with 350 N of force. Illustrate what is the safe's coefficient of kinetic friction on the bank floor?
question a small sphere with a mass of 0.002g and carrying a charge of 510-8c hangs froma thread near a very large
A solenoid in MRI is 2.40 m long, 94 cm in diameter, and 1200 turns of superconducting wire. Find a) inductance, b) induced emf in the solenoid while the current in the wire is changing from 0 to 2.5 kA in 30 s.
Some species use echolocation to determine the position and velocity of objects and prey. What is the sound frequency of the echo the bat hears
a 3.77-kg ball of clay is thrown downward from a height of 3.47 m with a speed of 4.81 ms onto a spring with k 1690
A photographer uses his camera, whose lens has a 50 mm focal length, to focus on an object 3.5m away. How far must the lens move to focus on this second object
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