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A centrifuge in a medical laboratory rotates at an angular speed of 3450 rev/min. When switched off, it rotates through 54.0revolutions before coming to rest. Find the constant angular acceleration of the centrifuge.
A carpenter is driving a nail into a board. The 1.25 kg hammer moves at 8.85 m/s when it strikes the nail. find the increase in temperature of the nail after 3 blows from the hammer
A mass m1 = 3.2 kg rests on a frictionless table and connected by a massless string over a massless pulley to another mass m2 = 4.3 kg which hangs freely from the string, How much work is done by gravity on the two block system
how much work is required to accelerate a proton from rest up to a speed of 0.957c, what would be the momentum of this proton
To a first approximation, the velocity of sound in air for different temperatures can be calculated as v=(331+0.6T) m/s, How far away was the lightning
A long solenoid that has 1,105 turns uniformly distributed over a length of 0.452 m produces a magnetic field of magnitude 1.00 10-4 T at its center
An 9.00 {rm kg} point mass and a 15{rm kg} point mass are held in place 50{rm cm} apart. A particle of mass m is released from a point between the two masses 19{rm cm} from the 9{rm kg} mass along line connecting the two fixed masses.
A rock thrown with speed 10.5 and launch angle 30.0(above the horizontal) travels a horizontal distance of = 18.0before hitting the ground. Find the height (yi) from which the rock was launched
Two capacitors, one 17.5 ?F and the other 12.2 ?F are connected in series across a 15 V battery. What is the charge stored on the 12.2 ?F capacitor
A 20.0 kg wood ball hangs from a 1.3 m long wire. The maximum tension the wire can withstand without breaking is 300 N. A 0.70 kg projectile travelling horizontally hits and embeds itself in the wood ball.
A 105-kg water skier floating in a lake is pulled from rest to a speed of 14 m/s in a distance of 25m. What is the net force exerted on the skier, assuming his acceleration is steady.
A block starts with a certain speed at the top of a frictionless inclined plane with an unknown angle to the horizontal. To calculate the time required for the block to reach the bottom of the plane.
There are two protons of a helium atom seperated by 1.00e-15m, If the protons were allowed to move, what would be their initial acceleration due to the electric force between them
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