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A ship's mast reaches to a height of 15 meters above the surface of a 10-meter- deep lake. When the sun is 30 degrees above the horizon, how long will the shadow of the mast be on the bottom of the lake?
A cue ball hits a stationary eight ball on a pool table. For which of the following systems is there a change in momentum during the collision? define why.
Drag race tires in contact with an asphalt surface have an extremely high coefficient of static friction. Assuming a constant acceleration and no slipping of tires, estimation the coefficient of static friction needed for a drag racer to cover 1.0 km..
What is the distance, measured along the screen, between this bright fringe and bright fringe corresponding to m = 3.
A body travels a distance of 3km towards east and 4 km towards north and finally 9 km towards east. what is the total distance travelled and displacement of body.
A vertical scale on a spring balance reads from 0 to 245 rm{N}. The scale has the length of 11.0 rm{cm} from the 0 to 245 rm{N} reading. A fish hanging from bottom of the spring oscillates vertically at a frequency of 3.00 rm{Hz}.Ignoring the mass..
What is the rms speed of the molecules in low-density hydrogen gas at 0 ^circ {rm C}? (The mass of a hydrogen molecule, rm{H_2} , is 3.32×10-27 kg ).
What is the horizontal distance between elbow and the point where the weight of the forearm acts.
A uniformly charged insulating rod of length 19.0 cm is bent into the shape of a semicircle. The rod has a total charge of -7.50 µC. Find the magnitude and direction of the electric field at O, the center of the semicircle. EO = N/C.
Define the frequency components of an AM signal and draw the AM signal for the given modulation index.
A 220 g block on a 50 cm long string swings in a circle on a horizontal, frictionless table at 95.0 rpm. what is the tension on the string.
Two spherical objects with a mass of 6.86 kg each are placed at a distance of 3.06 m apart. How many electrons need to leave each object so that the net force between them becomes zero?
A charge of +1 coulombs is placed at the 0 cm mark of a meter stick. A charge of +4 coulombs is placed at the 100 cm mark of the similar meter stick.
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