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A 78kg astronaut is floating in space, he throws a 600 gram wrench at 20 m/s in the direction away from the space station so that he can begin floating towards space. How fast will he be traveling? Speed= Distance=
at the instant a traffic light turns green a car that has been waiting at the intersection starts ahead with a constant
A 10-m-long glider with a mass of 780kg(including the passengers) is gliding horizontally through the air at 30m/s when a 70Kg skydiver drops out by releasing his grip on the glider. What is the glider's speed
92X235 absorbs a thermal neutron and fissions into: 37Y93 and 55Z141. What nucleons are produced by the fission
A wire with a resistance of 5.1 ? is drawn out through a die so that its new length is 3 times its original length. Find the resistance of the longer wire
In a certain library the first shelf is 15.0 off the ground, and the remaining four shelves are each spaced 32.0 above the previous one. If the average book has a mass of 1.7 with a height of 18 , and an average shelf holds 25 books, how much work is..
Two soccer players start from rest, 33 m apart. They run directly toward each other, both players accelerating. How much time passes before the players collide
What is the repulsive force among two pith balls that are 12.0 cm apart and have equal charges of -26.0 nC?
on a distant planet golf is just as popular as it is on earth. a golfer tees off and drives the ball 4.7 times as far
Seat belts and air bags save lives by reducing the forces exerted on the driver and passengers in an automobile collision. Cars are designed with a "crumple zone" in the front of the car. Estimate the net force that ultimately stops the person
An electron moving in the positive x-direction passes through a slit of width ?y = 95.5 nm. What is the minimum uncertainty in the electron's velocity in the y-direction
A spring is first stretched 2.0 cm from its unstressed length. It is then stretched extra 1.8 cm. How does the work needed for the second stretch compare to the work required for the first stretch (give a ratio of second to first)?
A empty sphere of radius 0.35 meter, with rotational inertia I = 0.052 kg m2 about a line through its center of mass, Determine what is its total kinetic energy now
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