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A 25-m-long rocket travels so fast that a red stoplight, with a wavelength of 700nm, appears to the pilot to be a green light with a wavelength of 520nm
What is the length of the rocket to an observer standing at the intersection as the rocket speeds through?
a 2.50 muf capacitor is charged by a 12.0- battery. it is disconnected from the battery and then connected to an
A boy uses this string to whirl a 10-kg stone in a horizontal circle of radius 10 m. The boy continuously increases the speed of the stone. At approximately illustrate what speed will the string break?
a particle p with mass 9kg has position vector rr2.5m and velocity vv45.0 ms. it is acted on by force f f10.0 n. all
A window washer is standing on a scaffold supported by a vertical rope at each end. The scaffold weighs 192 N and is 3.1 m long. What is the tension in each rope
In an American football game, a 90.4 kilogram fullback running east with a speed of 5.07 m/s is tackled by a 94.0 kilogram opponent running north with a speed of 2.99 m/s. Obtain the mechanical energy lost as a result of the collision
A thin rod has a length of 0.292 m and rotates in a circle on a frictionless tabletop. The axis is perpendicular to the length of the rod at one of its ends. what is the change in the angular velocity of the rod
An 18.00 g rifle bullet travelling 250 m/s buries itself in a 3.6 kg pendulum hanging on a 2.8 m long string, which makes the pendulum swing upward in an arc. Determine the horizontal component of the pendulum's displacement.
Eric Brinker of JetBlue noted that the database developed during the crisis had not been needed before because the company had never experienced a meltdown. What are the risks and benefits associated with this approach to IT planning? Provide some..
Two 1.5cm -diameter disks face each other, 2.0mm apar, What launch speed must the proton have to just barely reach the positive disk
A softball of mass 0.220 kg that is moving with a speed of4.5 m/s (in the positive direction)collides head-on and elastically with another ball initially atrest. Calculate the mass of the target ball
A block of ice starts from rest on an apartment building's roof, which slopes at 41° below the horizontal. How far from the building does the block strike the ground
How is the voltage divided among resistors in parallel and What happens to resistance when resistors are connected in parallel
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