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A uniform chain with a mass of 1.38 kg per meter of length is coiled on a table. One end is pulled upward at a constant rate of 0.54 m/s.
(a) Calculate magnitude of the net force acting on the chain. Incorrect: Your answer is incorrect.
(b) At the instant when 0.20 m of the chain has been lifted off the table, how much force must be applied to the end being raised? Incorrect: Your answer is incorrect.
A parallel-plate capacitor has fixed charges +Q and -Q. The separation of the plates is then doubled. (a) By what factor does the energy stored in the electric field change? (b) How much work must be done in doubling the plate separation from d to..
For no apparent reason, a poodle is running at a constant speed of 6.00 m/s in a circle with radius 2.9 m. Let v1 be the velocity vector at time t1 , and let V2 be the velocity vector at time t2 . Consider (change in v)=v2-v1 and (change in t)=t2-..
At what speed (m/s) would a 1140-kg car have the same momentum as a 12,600-kg truck traveling at17.8km/hr,What is the car's change in momentum
A meniscus lens is concave on one side and convex on the other. Find the refractive power (diopters) of a meniscus lens
find the magnitude and direction of the impulse delivered to the ball by the floor.
Two speakers are emitting simple harmonic sound waves of frequency 258 Hz and 256 Hz. Describe the sound heard by a listener
A composite bar made from two different materials of equal cross-sectional areas are directly attached to each other making the bar a length of L = L1 + L2.
What is the freezing point of human blood and What would be your hypothesis why salt water freezes at a lower temperature than pure water
A system consists of two positive point charges, q1 and q2>q1. The total charge of the system is +62.0 x 10^-6 C, Find q1 and q2
Two indentical spaceships are travelling in the same direction. an observer on earth measure the first to have a speed of 0.80c, determine the speed of second spaceship
It is proposed that future space stations create an artificial gravity by rotating, What rotation period will provide "normal" gravity
find friction force that acts on the bear.
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