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A pitcher claims he can throw a baseball with as much momentum as a 4.00 gram bullet moving with a speed of 1200 m/s. A baseball has a mass of 0.145 kilogram. Find what must be its speed if the pitcher's claim is valid?
The drawing shows three situations in which a block is attached toa spring. The position labeled “0 m” represents theunstrained position of the spring. The block is moved from aninitial position x0 to a final positionxf, the magnitude of the displa..
a variable-length air column is placd just below a vibrating wire that is fixed at both ends. the lenth of the air
A particle that has an 8.2 -μC charge moves with a velocity of magnitude 5.0x10^5 m/s along the +x axis. It experiences no magnetic force, although there is a magnetic field present.
a star of mass 2.0 x 1031 kg that is 4.4 x 1020 m from the center of a galaxy revolves around that center once every
Sound is passing perpendicularly through an open window whose dimensions are 1.1 m x 0.75 m. How much sound energy comes through the window
A vehicle is negotiating a flat circular curve of radius 50 meter with a speed of 20 m/s. The maximum centripetal force (provided by static friction) is 1.2 x 10^4 N. Determine what is the mass of the car
An old oaken bucket of mass 6.75kg hangs in a well a the endof a rope. What is the total work done on the bucket
q1. in a science fiction story a microscopic black hole is given an enormous positive charge by firing an
A loop of wirein the plane of the floor has a clockwise current of 7.78A. The radius of the loop is 19.7cm. Use the Biot SavartLaw to calculate the magnetic field at the center of the loop. What is the directionof the magnetic field at the center? Ex..
An interference filter has an effective bandwidth of 10 nm. Would it be feasible to employ such a filter to isolate the calcium emission line at 422.7 nm from the potassium emission line at 404.4 nm? Assume that the signals are triangular in shape. S..
A satellite is in a circular orbit around the earth. The period of the satellite is 25.4 hr. Calculate the radius of the orbit and speed of the satellite
A car travels 90 m due north in 15 seconds. Then the car turns around and travels 40 m due south in 5 seconds. what is the magnitude of the average velocity of the car
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