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A uniform thin wire has a length L = pi R and is bent into a semicircular arc of radius R. If the wire starts at (x, y) = (R, 0) and curves counterclockwise to x, y) = (-R, 0). what is the y coordinate of its center of mass?
a car travels around 200 m radius flat curve at 40 ms at constant speed. what is the minimum static coefficient of
An archeological specimen containing 10.2 g of carbon has an activity of 1.6 Bq. How old (in years) is the specimen
A 5.0-kg object is pulled along a horizontal surface at by a 15 N force acting 20? above the horizontal. How much work is done by the gravitational force
A vertical speaker, which can be viewed as a 30.0-cm gap, is playing a 1.20-kHz tone from the center of the stage, 10.0 m away from the first row of the seats. A listener in the first row tries to avoid the loud sound with sitting off the center of t..
Two blocks, each with weightw, are held in place on a frictionless incline in terms ofwand the angleaof the incline. Calculate the magnitude of the force that the incline exerts on each block in N
A new General Electric kitchen stove has a mass of 68kg and the dimensions. The stove comes with a warning that it can tip forward if the person stands or sits on oven door when it is open.
a bullet is fired from a rifle that is held 1.59 m above the ground in a horizontal position. the initial speed of the
a 200g hockey puck is launched up a metal ramp that is inclined at a 30° angle. what vertical height does the puck reach above its starting point
Two weights are connected by a very light flexible cord that passes over a 30 frictionless pulley of radius 0.100. The pulley is a solid uniform disk and is supported by a hook connected to the ceiling. One weight is 75N and the other is 125 N.
the membrane that surrounds a certain type of living cell has a surface area of 4.00 x 10-9 m2 and a thickness of 1 x
If the coefficient of friction between the block and the floor is 0.40, what is the mass of the block.
You have a 6kg cart that has a spring attached to the front. You hold the cart so the spring is compressed against the wall. What is the total work done by the spring on the cart
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