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How close would two stationary electrons have to be positioned so that their total mass is 4 times what it is when the electrons are very far apart?
An archer shoots an arrow with a velocity of 30 m/s at an angle of 20 degrees with respect to the horizontal. What is the initial speed of the apple
a kickers extended leg is swung for 0.4 s in a counterclockwise direction while accelerating at 200 degs2. what is the
A typical ten-pound car wheel has a moment of inertia of about. What is the rotational kinetic energy of the rotating wheel
A thin spherical shell of mass 4.00 kg and diameter 0.200 m is filled with helium (density ? = 0.180 kg/m3). How long will it take for the top of the shell to reach the water surface
How many kilocalories of heat are produced when the brakes are used to bring a 930 kg car to rest from a speed of 102 km/h.
An electron is trapped in a one-dimensional infinite potential well that is 310 pm wide; the electron is in its ground state. What is the likelihood that you can detect the electron in an interval of width δx = 5.0 pm cantered at x = 250 pm?
An optical disk drive in your computer can spin a disk up to 10,000 rpm (about 1045 rad / s). what is the magnitude of the average angular acceleration of the disk
A diver 40 m deep in 10 degree Celcius fresh water exhales a 0.50-cm-diameter bubble. What is the bubble's diameter just as it reaches the surface of the lake, where the water temperature is 20 degrees Celcius? Assume that the air bubble is always in..
A 0.11-g bullet leaves a pistol at 323 m/s, while a similar bullet leaves a rifle at 396 m/s. Explain the difference in exit speeds of the two bullets, assuming that the forces exerted on the bullets by the expanding gases have the same magnitude.
A cosmic ray electron moves at 7.85 x 10e6 m/s perpendicular to the earth's magnetic field at an altitude, What is the radius of the circular path the electron follows
In addition, snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find out the acceleration of the sled and child.
The rolling resistance for steel on steel is quite low; the coefficient of rolling friction is typically r=0.002. How far will the locomotive move during this time
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