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A drinking straw 20 cm long and 3.0 mm in diameter stands vertically in a cup of juice 8.0 cm in diameter. A section of straw 7.0 cm long extends above the juice. A child sucks on the straw, and the level of juice in the glass begins dropping at 0.23 cm/s.
a) By how much does the pressure in the child's mouth differ from atmospheric pressure?
b) What is the greatest height from which the child could drink, assuming this same mouth pressure?
An ideal, monatomic gas is allowed to expand quasi-statically and adiabatically, What is the work done by the gas and What is the change in the internal energy of the gas?
Two pure tones are sounded together. The periods of their pressure variations are 0.0151 s and 0.0159 s, What is the beat frequency
the coefficient of kinetic friction between the table and the block is 0.320. Sand is gradually added to the bucket until the system just begins to move. Compute acceleration of the motion.
Given that C = 0.22 µF, and the initial plate charge is Q0. What is the resistance of the resistor across the capacitor
It requires 78.73 J of work to lift a rock to a height of 4.03 m. What is the mass of the rock
How far does the jet travel while it is accelerating and how large is the force that the catapult must exert on the jet?
An 8.0 m, 100 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.40, what is the minimum angle that ladder can make with the floor before it slips.
A 1000 kg aircraft going 25 m/s collides with a 1500 kg aircraft that is parked and they stick together after the collision and are going 10 m/s after the collision
Water flowing through a 2.0cm -diameter pipe can fill a 500L bathtub in 4.9min. What is the speed of the water in the pipe
A closely wound rectangular coil of 100 turns has dimensions of 20.0{\rm cm} by 50.0{\rm cm}. What is the average emf induced in the coil
If air resistance is negligible, using energy considerations alone, how fast must the ball be going after it falls 200 meters.
An elastic cord is 65 cm long while a weight of 56 N hangs from it and is 82 cm long while a weight of 84 N hangs from it. What is the spring constant of this elastic cord.
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