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A 78 kg diver steps off a 11 m tower and drops from rest straight down intothe water. If he comes to rest 4.3 mbeneath the surface, determine the average resistance force exertedon him by the water.
What is the lenght of the driveway. An electric field = (89000 N/C, right) causes the ball in the figure below to hang at a 20° angle. The ball's mass is 4.7 g. What is the charge on ball.
Two metal balls are hung from strings. The first ball, 0.14 kg, is pulled to the side and released so that it strikes the second ball with a speed of 1.98 m/s. What is the mass of the second ball
When cars are equipped with flexible bumpers, they will bounce off each other during low-speed collisions, thus causing less damage. Calculate the change in the combined kinetic energy of the two-car system during this collision
What is the wavelength of the waves emitted by source? What is the difference in frequency between directly radiated waves and the waves reflected from a whale travelling straight toward the ship at 4.99? Suppose that the ship is at rest in the water..
Explain how does a magnitude of the electrical force between a pair of charged particles change when they are brought to half their original distance of seperation?
The electrric field between the plates of a parallel-plate capacitor is horizontal, uniform, and has a magnitude E. What is the magnitude of the electric field
how much tension must a cable withstand if it is used to accelerate a 20.0 kg car vertically upward at 0.70 m/s^2
two 2.50 cm x 2.50 cm plates that form a parallel-plate capacitor are charged to 0.706 .a. what is the potential
A rectangular block of ice 7.00 m on each side and 1.80 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3. How high does the top of the ice block float above the water level.
a violin string vibrates at 294 hz when unfingered. at what frequency will it vibrate if it is fingered one-third of
A cannon of mass 5.17 x 10 3 kg is rigidly bolted to the earth so it can recoil only by a negligible amount. The cannon fires a 74.3-kg shell horizontally with an initial velocity of 542 m/s. Suppose the cannon is then unbolted from the earth, and..
A 70- kg child sits in a swing suspended with 3.3- m-long ropes. determine the speed the child will have at the bottom of the arc
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