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A homemade electroscope has 2 pieces of straw hanging from 2strings dangling from a hook. The length of the string fromtop to bottom on one side is 8 cm. When charged, the strawsstay 2 cm apart. The mass of one of the straws is .08 grams. Assuming the straws have an equal charge, how much is the charge on one of the straws?
A 4.3-kg solid sphere, made of metal whose density is 4700 kg/m3, is suspended by a cord. Find the density of the liquid
An astronaut is being tested in a centrifuge. The centrifuge has a radius of 3.58 m, what is the magnitude of the astronaut's linear speed
a spare pressure vessel flange bolt is discovered inside the reactor shroud during a refueling outage of a nuclear
the brakes of a truck cause it to slow down by applying a retarding force of 3.0x103n to the truck over a distance of
In 1993 a giant 400-kg yo-yo with a radius of 1.5 m was dropped from a crane at height of 57 m, estimate its linear speed at the end of the fall
An object with a height of 2.49cm is placed 35.5mm to the left of a lens with a focal length of 34.2mm. What is the height of the image
An aluminum cup contains 225 g ofwater and a 40 g copper stirrer, all at 27°C. Calculate the mass of the aluminum cup
A hang glider and its pilot have a total mass equal to 120kg.While executing a 360 degree turn, the glider moves in a circlewith an 8-m radius. What is the net force on the hang glider
Four spheres are arranged as in the figure in the corners of a 2cm-side square, How much work is required to move a tiny charge of 10nC from C to A
at a given instant of time the temperature distribution within an infinite homogeneous body is given by the function tx
A 7.57- g bullet is moving at 689.00 m/s as it leaves the 0.63- m-long barrel of a rifle. What is the average force on the bullet
A baseball is thrown with an inital velocity of 20 m/s along the horizontal axis and 15 m/s along the vertixal axis. The ball soon reaches the highest point, what is the speed at that point? (ignore air friction) I know the answer is 20 m/s, just nee..
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