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A 5.50 x 105 kg subway train is brought to a stop from a speed of 0.600 m/s in 0.900 m by a large spring bumper at the end of its track. What is the force constant k of the spring?
Suppose the amount of heat added to the ice block is doubled. By what factor must the mass of the ice be increased if the system is to have the same final temperature
An automobile traveling at 15.0 km/h along a straight, level road accelerates to 65.0 km/h in 6.00 s. What is the magnitude of the auto's average acceleration
An artificial satellite is moving in a circular orbit with a speed of 6.3 km/s and a period of 84.0 min. What is the acute angle between the radius vector and the total acceleration of the satellite
what is the initial velocity of the boulders?
A 1.00 uF capacitor is connected in parallel with a 2.00 uF capacitor. The 1.00 uF capacitor carries a charge of +10 uC on one plate, find the potential on the negative plate of the 1.00 uF capacitor
An electron beam contains electrons that move along the +x-axis at 0.020c. The beam enters a region of length 1.0 m and runs parallel to a wire that carries a 0.20-A current in the +x-direction.
A railroad flatcar is loaded with crates having a coefficient of static friction 0.25 with the floor. how short a distance can the train be stopped without letting the crates slide
What is the electrical potential at the surface of a gold nucleus? The radius is 6.6 x 10-15 m and the atomic number Z = 79
A child throws a rock horizontally off of a 7m building with a velocity of 17 m/s/ East. How far away from the building will the rock land
Explain how much work does the spring do on the block if the spring is stretched from relaxed length by 15.1 mm as the block is moved?
a ferris wheel with a radius of 14.0 m rotates at a constant rate completing one revolution in 30.0s. what is the
During a violent storm, a car is struck by a failing high-voltage wire that puts an excess charge of -850 mircoC on the metal car. how much is on the outer surface of the car
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