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A leather ball of circumference 75.1 cm and mass 583 g is forced to the bottom of a swimming pool and then released. After initially accelerating upward, it rises at a constant velocity.
a) Calculate the buoyant force on the ball.
b) Calculate the drag force the ball experiences while it is moving upward at constant velocity.
A converging lens has a focal length of f = 22 cm. If an object is placed 42 cm from the lens, where will the image be formed
A car is traveling at 43.2km/hr on a flat, concrete highway. If the brakes are applied such that skidding occurs, the kinetic coefficient of friction between the road and tires is 0.808. If anti-lock brakes are properly applied after that no skidd..
Johnny takes a running jump off the trampoline. He lands on the ground after .95 seconds. His landing point is 1.2 m below and 2 m horizontally from his launch point. FInd: A. His initial velocity B. FInal Velocity C. his maximum height above the ..
A severe thunderstorm dumped 2.5 in of rain in 30 min on a town of area 33km2. What mass of water (in kg) fell on town? One cubic meter of water has a mass of 103kg.
A 211kg rock sits in full sunlight on the edge of a cliff 4.90m high. The temperature of the rock is 30.2?C. what is the final temperature of the rock-water system
An object is placed to the left of a lens, and a real image is formed to the right of the lens. How far from the lens is the object
A soccer ball with a mass of 448g bounces off the crossbar of a goal and is deflected upward at an angle of 56.2° with respect to horizontal. Immediately after deflection, the kinetic energy of the ball is 47.70 J. What are the vertical and horizo..
A sign has a mass of 1050 kg, a height h = 1 m, and a width W = 4 m. It is held by a light rod of length 5 m that is perpendicular to a rough wall. What is the smallest value of the coefficient of friction
A 5.00 g charged insulating ball hangs on a 27.0 cm long string in a uniform horizontal electric field. Given the charge on the ball is 2.00 ?C , find the strength of the field. The angle that the string makes with the vertical is 8.00° N/C.
The heat of vaporization of ethyl alcohol is about 200 cal/g. If 2.8kg of it were allowed to vaporize in the refrigerator, how many grams of ice would be formed from 0 °C water.
Two microscopes are placed one on top of the other. They are in contact at one end but a hair separates them at the other end. determine the thickness of the hair?
If it takes a fish 0.20s to perform evasive action, at illustrate what minimum height must it spot the pelican to escape? Assume the fish is at the surface of the water.
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