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A child playing tee ball hits a stationary 65 g ball with a 200 g bat swinging initially at 4.0 m/s. Bat and ball move in the same direction after the impact, the ball at 6.4 m/s.
What's the bat's post-impact speed?
What is the Kinetic energy of the Helium atom as it passes the 0 V plate. The mass of the Helium nucleus is 6.64e^-26
A canoe has a velocity of 0.54m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.52m/s east relative to earth.
A 50.0 kg box is resting on a horizontal floor. A force of 250 N directed at an angle of 26.0 degrees below the horizontal is applied to the box. What is the minimun coeffiecient of static friction
A certain medical machine emits x-rays with a minimum wavelength of 0.025 nm. One day, the machine has an electrical problem and the voltage applied to the x-ray tube decreases to 80 percent of its normal value. Now what is the minimum x-ray wavel..
Two tugs A and B pull a ship along a direction XO. Tug A exerts a force of 30kN at an angle of 15 degrees to XO, Find the angle X for the resultant force on the boat to be along XO
A soldier is tasked with measuring the muzzle velocity of a new rifle. Knowing the principles of projectile motion, What is the most accurate muzzle velocity that the soldier can report to his sergeant
One end of a metal rod is in contact with a thermal reservoir at 691 K, and the other end is in contact with a thermal reservoir at 105 K. what is the change in entropy of the rod
A stamp collector is viewing a stamp with a magnifying glass held next to her eye. Her near point is 25 cm from her eye. What is the refractive power of a magnifying glass
Cut a 1 cm cube in dimension along the X, Y, and Z axis 10 times and calculate the volume and surface area at each cut.
A proton is projected in the positive x direction into a region of uniform electric field E = -5.50 105 i N/C at t = 0. Determine the time interval over which the proton comes to rest
A hand grenade (m=580g) slides across the (essentially frictionless) floor at a speed of 0.86 m/s. determine the speed of the second fragment
A coil is placed in a changing magnetic field and an emf is induced. What happens to induced emf if the rate of change of magnetic field quadruples.
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