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A garden hose with an internal diameter of 2.0 cm is connected to a (stationary) lawn sprinkler that consists merely of an enclosure with 30 holes, each 0.18 cm in diameter. If the water in the hose has a speed of 0.83 m/s, at what speed does it leave the sprinkler holes?'
An ice skater is gliding horizontally across the ice with an initial velocity of +7.77 m/s. How much time elapses before her velocity is reduced to +3.00 m/s
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 46 dB by an observer 10 km away. What is the average power generated by the horn
Three masses ( 3kg 5kg 7kg) are located in the xy-plane at the origin, (2.3 m, 0), and (0, 1.5 m), respectively. Determine the center of mass of the system
A particle of mass 0.350 kg is attached to the 100-cm mark of a meterstick of mass 0.200 kg. Calculate the angular momentum of the system when the stick is pivoted about an axis perpendicular to the table through the 50.0-cm mark
An electron enters the region between two plates traveling along the x-direction with a speed of v = 2.53x10^6 m/s. Both plates are parallel to the x-y plane and are separated by 3.2 cm. The potential of the top plate at z = 3.2 cm is +150 V while th..
A ruby laser emits an intense pulse of light that lasts a mere 30 ns. The light has a wavelength of 690 nm , and each pulse has an energy of 700 mJ. How many photons are emitted in each pulse
What is the speed and total energy of an electron whose kinetic energy is 3 times its rest energy
A heat engine has an efficiency of 25%, and its heat input is 600 J per cycle from the high-temperature reservoir
1 the scientific method is used by scientists to understand the natural laws that the universe obeys. scientists are
A 33.1-A current flows in a long straight wire. Find the strength of the resulting magnetic field at a distance of 65.7 cm from the wire
A 9.0 V battery is connected across two large parallel plates that are separated by 4.5 mm of air, creating a potential difference of 9.0 V between the plates. What is the electric field in the region between the plates
A football punter accelerates a football from rest to a speed of 11 m/s during the time in which his toe is in contact with the ball (about 0.24 s). what average force does the punter exert on the ball
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