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A 4.94-g bullet is shot through a 0.99-kg wood blocksuspended on a string 2.00 m long. The center of mass of the blockrises a distance of 0.50 cm. Find the speed of the bullet as itemerges from the block if its initial speed is 393 m/s.
A 40 g ball of clay traveling east at 5 m/s collides with a 80 g ball of clay traveling 30 degrees south of west at 1 m/s. What are the speed and direction of the resulting 120 g ball of clay?
If a car traveling at 23 m/s is brought to a full stop in 3.8 s after the brakes are applied, find the average acceleration during braking
a sealed evacuated 1.11 liter container initially contains 0.32 liter of liquid helium. as the contents of the
A cube 21cm on each side contains 3.5g of helium at 20 \; ^\circ \rm C. 1400J of heat energy are transferred to this gas.
Design an amplifier using a 741 that has a gain of 20. What are the input and output impedances of your amiplifer
question assume you are dealt two cards successively without replacement from a standard 52-card deck. in this section
A pot of hot water is boiling on your stove. The pot is in the shape of a round cylinder made of aluminum which is 10 cm in radius. The aluminum is 3 mm thick. You notice that after 25 minutes.
a grandfather clock is controlled by a swinging brass pendulum that is 1.2 m long at a temperature of 21degc. a what is
A bat at flying east at 30 m/s sends out ultrasonic waves at 60kHz and receives them returned from an object moving east at 35.0 m/s, What is the sound frequency of the reflected wave as heard by bat
A Carnot engine whose high-temperature reservoir is at 680{\rm K} takes in 530{\rm J} of heat at this temperature in each cycle, What is the temperature of the low-temperature reservoir
a car is parked on a cliff overlooking the ocean on an incline that makes an angle of 24.0deg below the horizontal. the
A sample of wood from an archaeological excavation is dated by using a mass spectrometer to measure the fraction of 14C atoms. What is the wood's age
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