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At the same instant that a motionless 9.6 kg ball is dropped from 27 m above the Earth's surface, a second ball, with a mass of 4.5 kg, is thrown straight upward from the Earth's surface with initial velocity of 21.1 m/s. They move along nearby lines and pass without colliding. At the end of 2.1 s, what is the velocity of the center of mass of the two-ball system?
What is the car's maximum speed on an incline. A fire hose held near the ground shoots water at a speed of 5.4 m/s, At what angle(s) should the nozzle point in order that water land 2 m away.
At full power, how long would it take for car to accelerate from 0 to 56 mph? Neglect friction and air resistance.
A professor's office door is 0.9 wide, 2.0 high, and 4 thick; has a mass of 25; and pivots on frictionless hinges. A "door closer" is attached to door and top of the door frame.
an elastic collision between two bodies in which the collision is not head-on. Projectile particle m1 is an alpha particle and target m2 is an oxygen nucleus. Find the initial speed of the alpha particle
A proton in Fermilab's Tevatron is accelerated through a potential difference 2.06 MV during each revolution around the ring of radius 1.00 km. how many revolutions must the proton make
When Babe Ruth hit a homer over the 7.5 -high right-field fence 98 from home plate, roughly what was the minimum speed of the ball when it left the bat? Assume the ball was hit 1.4 above the ground and its path initially made a 37 angle with the grou..
An 39-turn circular coil of radius 22.1 cm carries a current of 3.37 A. What is the strength of the magnetic field
the 15,000kg boxcar A is coasting freely at 1.5 m/s on the horizontal track when it encounters tank car B having a mass of 12,000kg and coasting at .75 m/s if the cars meet and couple together
A parallel-plate air capacitor with a capacitance of 245 has the charge of magnitude 0.1502 on each plate. The plates have the separation of 0.323.
A capacitor has parallel plates of area 12 cm2 separated by 2.0mm . The space between the plates is filled with polystyrene (K=2.6, Em=2.0×107V/m). Find the permittivity of polystyrene
A firm wants to determine the amount of frictional torque in their current line of grindstones, so they can redesign them to be more energy efficient. What is the frictional torque exerted on the grindstone
A charged particle moves through a velocity selector at a constant speed in a straight line. The electric field of the velocity selector is 4290 N/C, Find the charge-to-mass ratio of the particle
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