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A child whose mass is 40 kg obstruction is on the 3rd floor of the building at a height of 15 m above the ground. Calculate the potential energy of the child if the child is now located on the 5th floor and is located 25 m from the ground!
The net entropy changes when a 81g ice cube initially at 0 degrees C melts in a room. What is the net entropy change if room temperature =19 degrees C? What is the net entropy change if room temperature =40 degrees C?
returns the shot with the ball traveling horizontally at 40 m/s in the opposite direction. Illustrate what is the impulse delivered to the ball by the tennis racquet?
The light goes through a second polarizer and exits with an intensity of 225 W/m squared? What is the orientation angle of the second polarizer
a particle with charge 9.49times10-8 is moving in a region where there is a uniform magnetic field of 0.470 in the
Three people are pulling on a box. The first person is pulling with a force of 100 N at 37 degrees with respect to the positive x-axis. find the force that the third person is exerting
What is the maximum force on a rod with a 0.100 uC charge that you pass between the poles of a 1.50 T strength permanent magnet at a speed of 5.00 m/s
The speed of light in material A is 1.4 times as large as it is inmaterial B. What is the ratio of the refractive indices ,nA/nB, of these materials
If a metallic wire of cross sectional area 3.0 x 10-6 m2 carries a current of 6 Amp and has a mobile charge density of 4.24 x 1028 carriers/m3, find the average drift velocity of the mobile charge carriers
A riffle with a mass of 3.00kg fires a bullet with a mass of 3.50 x 10 ^ -3 kg at a speed of 330 m/s. What is the recoil speed of the riffle
An old mining tunnel disappears into a hillside. You would like to know how long the tunnel is, but it’s too dangerous to go inside. However, you figure out a way:
When an elevator accelerates downward at 1.8m/s2, the floor of the elevator exert a 560N force on a passenger. What is the mass of the passenger
A cork shoots out of a champagne bottle at an angle of 35.0 degree above the horizontal. what was its initial speed
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