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A centrifuge is a device in which a small container ofmaterial is rotated at a high speed on a circular path. Sucha device is used in medical laboratories, for instance, to causemore dense red blood cells to settle through the less dense bloodserum and collect at the bottom of the contatiner. Supposethe centripetal acceleration of the sample is 6.25 *103times larger than the acceleration due to gravity. How many revolutions per minute is the sample making, if it is locatedat a radius of 5.00cm from the axis of rotation?
Seven grams of water are placed in a 2.03 liter pressure cooker and heated to 488 deg C. What is the pressure inside the container
A tree is approximated as a 60m tall cylinder with a diameter of 3m. What is the weight of the tree, using p as the unknown density of wood? Calculate the amount of compression of the tree due to gravity.
A 10 N horizontal force F pushes a block weighing 9.0 N against a vertical wall. The coefficient of static friction between the wall and the block is 0.75, What is the frictional force on the block
The drawing shows an electron entering the lower left side of a parallel plate capacitor and exiting at the upper right side. Theinitial speed of the electron is 1.88 x 106 m/s. The capacitor is 2.00 cm long, and its plates are separated by 0.150cm.
the following takes place at a colony on the moon some time in the distant futurea 40 kg cannon is loaded with a 10 kg
You can exert a total of 75 J to launch a 0.75 kg projectile up a 5 m long ramp. What is the total distance (in m) traveled by the projectile
A draw bridge of length L is being held up by an axel at its pivot and by a chail that is also of length L. The drawbridge has uniform mass. What is the minimum angle to shoot an arrow
Two capacitors C1 = 3.2 ?F, C2 = 13.5 ?F are charged individually to V1 = 19.0 V, V2 = 5.6 V. Calculate the final potential difference across the plates of the capacitors once they are connected
A blue car of length 4.41 m is moving north on a roadway that intersects another perpendicular roadway (see figure below). The width of the intersection from near edge to far edge is 30.0 m.
Two cars collide at an intersection. Car A, with a mass of 2000kg , is going from west to east, How fast was car A going just before the collision
a model rocket is fired straight up from ground level with a constant acceleration of 50ms-2 until the engine runs out
a car with a total mass of 1.92103 kg has wheels of radius 31.0 cm and moment of inertia 0.830 kg middot m2. what is
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