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A drag racer crosses the finish line, and the driver deploys a parachute and applies the brakes to slow down. The driver begins slowing down when timed 9.0sec and the car velocity is +28 m/s. When time is12.0 sec, the velocity has been reduced to +13 m/s. Determine the average acceleration of the dragster?
A sled and its rider are moving at a speed of 4.0 m/s along a horizontal stretch of snow. The snow exerts a kinetic frictional force on the run ner of the sled, what is the displacement of the sled
An intergalactic rock star bangs his drum every 1.52 s. A person on earth measures that time between beats is 2.10 s. How fast is the rock star moving relative to the earth.
a 5.00 kg wood cube rests on a frictionless horizontal table. it has two springs attached to it on opposite faces. the
a 4-cylinder gasoline engine has an efficiency of 28 and delivers 290j of work per cycle per cylinder. when the engine
The frequency doubled output of a Nd3+ YAG laser has a wavelength of 532nm. If each pulse of light has a total energy of 0.550J and the repetition rate of the laser is 30Hz, how many photons does the laser emit at 532nm in 3 minutes.
A silver can of mass 0.233 kg contains 0.030 kg of water. The system is heated electrically. The energy entering the system is calculated to be 207 J. By how much will the temperature (in Kelvin) of the system rise assuming all the heat goes into the..
Three thin uniformly charged shells A, B and C, with radii R, 2R , 3R respectively are placed one inside the other, What is the electric potential at radius 2R
A rifle is aimed horizontally at a target 30 m away. the bullet hits the target 1.9 cm below the aiming point. a.) What are the bullet's time of flight and b.) its speed as it emerges from the rifle?
a large 17 kg roll of paper with radius r=19cm rests against the wall and is held in place by a bracket attached to a rod through the center of the roll. compute the magnitude of the angular acceleration of the roll
A simple pendulum, 2.0 m in length, is released with a pushwhen the support string is at an angle of 25 from the vertical. what is its speed at the bottom of the swing
A diffraction grating of 6000 lines/cm is illuminated by monochromatic light. How far from the central maximum is the first order maximum
A particle of mass 0.450 kg is attached tothe 100 cm mark of a meter stick of mass 0.125 kg. The meter stick rotates on a horizontal,frictionless table with an angular speed of 6.00 rad/s.
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