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An 80.0 kg person carries a 25 N package up aflight of stairs. The vertical height of the stairs is 10.0 m. How much total work did the person do on herself and the package?
Most of us know intuitively that in a head-on collision between a large dump truck and a subcompact car, you are better off being in the truck than in the car. Why is this, find the average force on the truck driver from the seatbelt
A light ray is incident from air onto the surface of a very quiet lake. what is the index of refraction of the water
A 50 kg person performs a maximum vertical jump with an intial velocity of 2m/s. What is the performer's maximum kinetic energy during the jump
A ball of mass m = 2.6 kg moving with a speed of v0 = 14.8 m/s strikes an identical ball which was initially at rest. What is the final speed of the struck ball
A propeller is modeled as five identical uniform rods extending radially from its axis. The length and mass of each rod are 0.793 m and 2.97 kg, what is its rotational kinetic energy
What is maximal speed v of the elevator
A heart defibrillator passes 11.0 A through a patient's torso for 5.00 ms in an attempt to restore normal beating, What was the path's resistance?
Students determine the frequencies of standing waves on the horizontal segment of the string, then they raise a beaker of water until the hanging 1.4 kg {\rm kg} sphere is completely submerged.
question 1 what is the power rating of an appliance that uses 8 amps of current when plugged into a 120 volt
A tennis ball rolls off the edge of a tabletop of height 0.850m above the floor and strikes the floor at a point a horizontal distance 1.80 m from the edge of the table. You can ignore air resistance. Find out the time of flight.
Sodium ions (Na+) move at 0.861 m/s through a bloodstream in the arm of a person standing near a large magnet. what would be the magnetic force on the arm
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +3q. Sphere B carries a charge of -q. Sphere C carries no net charge.
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