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A girl is skipping stones across a lake. One of the stones accidentally ricochets off a toy boat that is initially at rest in the water . The 0.112 kilogram stone strikes the boat at a velocity of 14 m/s, 15 degree below due east, and ricochets off at a velocity of 9 m/s, 12 degree above due east. After being struck by the stone, the boat's velocity is 2.2 m/s, due east. Find the mass of the boat? Suppose the water offers no resistance to the boat's motion.
what would be the total area of solar cells necessary to meet these power demands including nighttime consumption and
a plane leaves seattle flies 75.0rm mi at 22.0circ north of east and then changes direction to 55.0circ south of east.
A 0.14-kg pinecone falls 16m on the ground, where it lands with aspeed of 13 m/s. What speed would the pinecone have landed if there had been noair resistance
in a haynes- shockley experiment the distance between the cross r and a is d0.1m t0.25 milliseconds if the carriers are
A parallel plate capacitor has a potential difference between the plates of 80 V. If the charge on one of the plates of the capacitor is +8.0 ?C, what is the electrical energy stored by this capacitor
A 125 object is taken to a height of 400 above the Earth's surface. What is the object's mass at this height? What is the object's weight at this height
two submarines are on a secret mission and need to arrive at a location in the middle of the atlantic ocean at the same
a horizontal magnetic field of 1.0 x 10-4 t is at an angle of 30o to the direction of the current in a straight wire 75
A fish uses an internal organ known as a swim bladder to change itsdensity so that it is equal to that of water, enabling it to remainsuspended under water
You have a parallel-plate ideal capacitor with a capacitance of 23mF that you connect to a 4V battery until it is fully charged. What is the diameter of the solenoid
A 0.04 kg bullet collides in elastically with a 0.5 kg ballistic pendulum. Before the collision the pendulum was at rest but immediately after collision the pendulum is moving with speed of 13.6 m/s. How fast was the bullet travelling before the coll..
a bird is flying directly toward a stationary bird-watcher and emits a frequency of 1250 hz. the bird-watcher however
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