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A train is traveling away from you at 120 km/h. The train blows its400-Hz whistle. Take the speed of sound to be 340 m/s. What frequency do you hear?
Force F = (3.0 N) + (-9.0 N) acts on a pebble with position vector r = (1.00 m) + (-1.6 m) , relative to the origin. What is the resulting torque acting on the pebble
Weight of a box is 150 pounds. The horizontal force required to move the box is 70 lb. What horizontal force is required if 60lbs is added to box.
suppose you wish to fabricate a uniform wire fromnbsp2.50nbspg of copper. the wire is to have a resistance of rnbsp
Three point charges have equal magnitudes, two being positiveand one negative. These charges are fixed to the corners of anequilateral triangle, as the drawing shows. The magnitude of eachof the charges is 5.5 μC, and the lengths of the sides of t..
A 1.7-nF capacitor charged to 83.0 V and a 7.7-nF capacitor charged to 24.0 V are connected with the negative plate of each connected to the negative plate of the other. What is the final charge on the 7.7-nF capacitor?
A certain conductor has 7.60 1028 free electrons per cubic meter, a cross-sectional area of 4.00 ? 10-6 m2, Find the drift speed of the electrons in the conductor
a boat moves through the water with two forces acting on it. one is a 1900 n forward push by the water on the propeller
Assume that if the shear stress in steel exceeds about 4.00 108 N/m2, the steel ruptures. (a) Determine the shearing force necessary to shear a steel bolt 1.20 cm in diameter. N (b) Determine the shearing force necessary to punch a 1.75-cm-diameter h..
in an alcohol-in-glass thermometer the alcohol column has length 11.84 cm at 0.0 degrees c and length 22.87cm at 100.0
The centers of a 11kg lead ball and a 100g lead ball are separated by 9 cm. what is the ratio of this gravitational force to the weight of the 100 g ball.
q1. an important news announcement is trans- mitted by radio waves to people who are 122 km away sitting next to their
A ball is thrown horizontally with a speed of 10.0 m/s, from the edge of the top of a building of height 19.6 m, and later strikes the (level) ground. How far from the base of the building did the ball strike the ground
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