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An archeologist on a dig finds a fragment of an ancient basket woven from grass. Later, it is evaluated that the carbon-14content of the grass in the basket is 9.17% that of an equal carbon sample from present-day grass. Calculate the age of the basket?
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A tennis player swings her 1000 g racket with a speed of 9.00m/s . She hits a 60 g tennis ball that was approaching her at a speed of 14.0m/s . The ball rebounds at 45.0m/s.
a container of ideal gas for which the thermal energy is given by eth 2.6 n r t is initially at pressure pi 1.1 x
he empire state building is 450 meters high. A pennydropped from the top would have what speed when it hits the sidewalk? A baseball player pops a flyball 20.0m straight up and the cathcer tossess his mask to catch the ball. How long will the cathc..
A 57.0kg cheerleader uses an oil-filled hydraulic lift to hold four 130kg football players at a height of 1.40m, what is the diameter of the football players' piston
a magnet is at the end of the dial-o-gram balance arm. the arm has an aluminum plate in the magnetic gap. what is the
If one of the crystal faces is matted (flat or reflecting) draw a picture and show how the x-rays travel, reflect and diffract on the first 2 layers of the atoms. Indicate the position of the detector in relation to the source and the crystal.
A 1300 kg car and 4940 kg truck undergo a perfectly inelastic collision. Before the collision, the car was traveling southward at 1.35 m/s, and the truck westward at 9.40 m/s. Find the velocity of the wreckage immediately after the collision. (Enter ..
two long straight wires are perpendicular to the plane of the paper. each wire carries a current of magnitude i. the
Speedboat A negotiates a curve whose radius is 198 m. Speedboat B negotiates a curve whose radius is 290 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
take east as the positive direction. an 80 kg fisherman jumps from a dock into a 129 kg rowboat at rest on the west side of the dock. what is the final velocity of the fisherman and the boat
question1one of the ways that a forensic scientist can figure out the make and model of a car from a hit and run
A 53.6-kg skateboarder starts out with a speed of 2.49 m/s. He does 114 J of work on himself by pushing with his feet against the ground. How much has the vertical height of the skater changed
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