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A boy whirls a stone in a horizontal circle 1.6 m above theground, by means of a string 1.4 m long. The angle between thestring and horizontal plane is 10o. The string breaks, the stoneflies of horizontally, and strikes the ground 6 m away. What was the centripetal acceleration of the stone while in circularmotion?
A vertical straight wire carrying an upward 30-A current excerts an attractive force per unit length of 8.0*10^-4 N/m on a a second paralled wire 7.0 cm away
In a young's double-slit experiment, light of wavelength 500 nm illuminates two slits which are separated by 1 mm. calculate the separation between adjacent bright fringes
A 1.2m -long, 900g rope pulls a 9.0kg block of ice across a horizontal, frictionless surface. The block accelerates at 1.0m/s^2, How much force pulls forward on the block of ice
Three point charges have equal magnitudes, two being positive and one negative. These charges are fixed to the corners of an equilateral triangle, as the drawing shows. The magnitude of each of the charges is 7.1 µC, and the lengths of the sides o..
Four 8.5 kg spheres are located at the corners of a square of side 0.80 m. Calculate the magnitude and direction of the total gravitational force
A 65kg, 1.70m tall person is standing in a room, Find the air temperature at which the heat transfer rate by radiation is just balanced by the rate of heat generation
The left arm of the tube has a cross-sectional area of A1=10 cm2, and the right arm has a cross-sectional area of A2=5 cm2. find the length of the water column in the right arm of the U-tube
Joe, standing stationary on a beach, sees a small boat of mass M = 195 kg go by at constant speed V = 13.1 m/s. Tom, a man of mass m = 88.5 kg, Find the speed of the boat v, relative to Joe
A spherical balloon is made from a material whose mass is 2.57 kg. The thickness of the material is negligible compared to the 1.22-m radius of the balloon. Find the absolute pressure of the helium gas
An unstrained horizontal spring has a length of 0.34 m and a spring constant of 200 N/m. Two small charged objects are attached to this spring, one at each end, determine the possible algebraic signs
A tennis player receives a shot with the ball of mass 0.058kg travelling horizontally at v=45 m/s and returns the shot with the ball travelling horizontally at 51 m/s in the opposite direction.
An empty hollow metal shell containing vacuum has a total charge of 3C on its outer surface. What is the total charge on the outer surface once this has happened
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