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Question: There is a broken bridge in the path of a train moving at 20 m/s. A person inside the train sees this and realizes that he needs to jump out from the back side of the train in order to escape from death. The broken bridge is 50m away from the train and the person is 15m far from the back end of the train. At what speed must he run towards the back end of the train so as to jump from it just when the train reaches the broken bridge?
The skater farthest out has a mass of 58.0 kg and is 7.80 m from the pivot. He is skating at a speed of 6.40 m/s. Find out the magnitude of the centripetal force that acts on him.
An ac generator has a frequency of 4.80 kHz and produces a current of 0.0400 A in a series circuit that contains only a 231 resistor, Obtain the voltage of the generator
A block of ice with a mass of 2.50kg is moving on a frictionless, horizontal surface. Calculate the magnitude of the velocity of the block
you have 2 capacitors one with capacitance 10.3uf and the other of unknown capacitance. you connect the two capacitors
Air traffic controllers use radar to keep track of the location of aircraft.
As the drawing illustrates, a siren can be made by blowing a jet of air through 20 equally spaced holes in a rotating disk. What must be the angular speed in radians per second of the disk
An electron is moving east in a uniform electric field of 1.53N/C directed to the west. What is the speed of the proton at point B
The Sun revolves around the center of the Milky Way Galaxy at a distance of about 30,000 light-years from the center, how many stars would there be in our Galaxy
If a visible photon with wavelength 434 nm is emitted from an atom in a hydrogen gas lamp, what energy state was the atom in before the photon was emitted? That is, what was the number for that state?
Passengers riding on a ferris wheel feel three times heavier at the bottom most point of the ride as they do at the top most point. The radius of the wheel is 19.62m, how many revolutions does the wheel make in one minute?
question1the input capacitance to an stm amplifier is 2pf. desired frequency response is 5 khz such as 0.0002 s time
When a 3.15-kg fan, having blades 16.5 cm long, is turned off, its angular speed decreases uniformly from 12.0 rad/s to 4.30 rad/s in 6.00 s. how long after it is turned off does it take the fan to stop
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