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If a car increases its speed from 14.2 mph to 42.6 mph, by what factor does the kinetic energy of the car increase? Enter your answer to three significant figures, Show work.
A stream of water strikes a stationary turbine blade horizontally. The incident stream has a velocity of +16m/s whilst the exit has a velocity of -16m/s. mass of water per second that strikes the blade is 30kg/s.find the magnitude of average force ex..
A person who is nearsighted has a far point of do = 4.8 m. Write an expression for the focal length of the glasses which will allow her to see distant objects clearly
A window washer is standing on a scaffold supported by a vertical rope at each end. the scaffold weighs 200N and is 3.21 m long. assume the 900N worker stands 1.44 m from one end of the scaffold. what is the force on the rope farther from the work..
King Arthur's knights use a catapult to launch a rock from their vantage point on top of the castle wall, 15 above the moat. The rock is launched at a speed of 26 and an angle of 32 above the horizontal. How far from the castle wall does the launc..
A proton is moving along the axis of a uniformly charged thin ring, of 20 nC/cm. The radius of the ring is 5 cm. If the proton started initially at 10 cm from the center of the ring with an initial velocity towards the ring, what initial speed does i..
A uniform plate of height 1.020 m is cut in the form of a parabolic section. Find the distance from the rounded tip of the plate to the center of mass
A cardinal (Richmondena cardinalis) of mass 3.80×10-2 kg and a baseball of mass 0.146 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p_c of momentum to magnitude p_b of the baseball's momentum.
Potassium iodide has an interplanar spacing of d = 0.296 nm. A monochromatic X-ray beam shows first-order diffraction maximum while the grazing angle is 7.8°. Compute the X-ray wavelength λ .
A long, straight wire runs along the y-axis. The wire carries a current in the positive y-direction that is changing as a function of time according to i = 8 A + (0.2 A/s)t. A loop of wire is placed in the xy-plane near the y-axis. The loop has di..
A race car travels northward on a straight, level track at a constant speed travels 0.764 km in 17.0 s. The return trip over the same track is made in 22.0 s. What is the average velocity for the total trip
Starting from rest, you pull the string with a constant force F = 8 N along a nearly frictionless surface. At the instant while the center of the disk has moved a distance x = 0.12 m, a length d = 0.27 m of string has unwound off the disk.
Jupiter has an average distance from the Sun that is about 5.2 times that of Earth. determine the orbital period for Jupiter
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