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A battery has an emf and an internal resistance . When the battery is connected to a 25 resistor, the current through the battery is 0.65 . When the battery is connected to 60 resistor, the current is 0.45 .
What is the Professors initial velocity. He is pushed a distance 3.00 m along the incline by a group of students who together exert a constant horizontal force of 595 N. The professor's speed at the bottom of ramp is 1.70 m/s.
An object of mass 5.26 kg is released from rest and drops 1.95 m to the floor. The collision is completely inelastic. How much kinetic energy is lost during the collision
A 2.00 kg frictionless block is attached to an ideal spring with force constant 314 n/m. Initially the block has a velocity of -3.77 m/s, Find the maximum force the spring exerts on the block
A planet's moon travels in an approximately circular orbit of radius 5.4 107 m with a period of 7 h 21 min. Calculate the mass of the planet from this information
q1. a juggler performs in a room whose ceiling is a height 3.0 m above the level of his hands. he throws a ball upward
A force of 2 N is applied to a stationary 5 kg block for 0.3s. What is the speed of the block after the force is applied
A kangaroo can jump over an object 2.70 m high. Calculate its vertical speed when it leaves the ground
An event occurs at x′ =60m, t′ =8×10-8 sec in a frame S′ (with y′ =0, z′ = 0). The frame S′ has a speed of 3c/5 in the x direction with respect to frame S. The origins of S and S′ coincide at t = 0, t′ = 0. What are the spacetime coordinates of th..
4.71 mol of neon gas is initially at a pressure of 4.23 atm and a temperature of 282oC. If the gas is cooled at constant pressure, until the volume is one third of the initial volume, what is the final temperature
An explorer in the dense jungles of equatorial Africa leaves his hut. He takes 38 steps at an angle 45 degrees north of east, What is the direction of the displacement that will return the explorer to his hut
Alpha Centauri, a star close to our solar system, is about 4.3 light years away. Suppose a spaceship traveled this distance at a constant speed of .90c relative to Earth. What is the trip distance according to the traveler
After inverting the tube 100 times, the temperature of the lead shot is found to have increased by 30C
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