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In a tape recorder, the magnetic tape moves at a constant linear speed of 3.51 cm/s. To maintain this constant linear speed, the angular speed of the driving spool (the take-up spool) has to change accordingly. The angular speed of the take-up spool when it is empty, with radius r1 = 0.80 cm?
Two masses m1 and m2 are connected by a string which goes over an ideal pulley. What is the acceleration of each mass
A converging lens (f = 12.4 cm) is located 31.8 cm to the left of a diverging lens (f = -5.4 cm). Find the overall magnification
A cylindrical eraser of negligible mass is dragged across a paper at a constant velocity to the right by its pencil. The coefficient of kinetic friction between eraser and paper is 0.650. The pencil pushes down with 3.70 .
The range of a projectile depends not only on v0 and ?0 but also on the value g of the free-fall acceleration, which varies from place to place. by how much would his record have differed
a model rocket is fired vertically from rest. It has acceleration of 14.2m/s^2. how high does the rocket travel
As a treatment for chronic back pain, a medical patient may be fitted with a device that passes a small electrical current , how many electrons pass through the muscles during one pulse
A wheel of radius 1.6m rotates at a uniform speed. what is the point's tangential speed
A bag of sugar weighs 7.00 lb on Earth. Find the mass of the bag of sugar in kilograms at each of the three locations
A parallel-plate capacitor has square plates of edge length1.1 cm and a plate spacing of0.09 mm. If the gap between the platesis filled with mica, what is the capacitance?
Imagine that you are at the equator and the air is motion less every where. How fast will aparcel of air be moving after 1 h
A certain lens focuses light from an object 1.25maway as an image 41.8cm on the other side of the lens. What type of lens is it
A 110 kg ice hockey player skates at 3.0 m/s toward a railingat the edge of the ice and then stops himself by grasping therailing with his outstretched arms. What average force must he exert on the railing
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