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Water flows at a rate of 25 L/min through a horizontal 7 centimeter diameter pipe under a pressure of 6 Pa at one point, calcium deposits reduce the cross sectional area of the pipe to 30 cm2. Evaluate what is the pressure at this point? (Consider water to be an ideal fluid.)
A spring has a force constant of 931N/m and an unstretched length of 8 cm. One end is attached to a post that is free to rotate in the center of a smooth table.
A 1000 {rm kg} wrecking ball hangs from a 15 {rm m}-long cable. The ball is pulled back until cable makes an angle of 25.0^circle with the vertical. By how much has the gravitational potential energy of the ball changed .
the hydrogen atom consists of a proton of mass 1.67 x 10-27 kg and an orbiting electron of mass 9.11 x 10-31 kg. in one
How many 112 W lightbulbs can you use in a 100 V circuit without tripping a 15 A circuit breaker? (The bulbs are connected in parallel, that means that the potential difference across each lightbulb is 100 V.)
In a location where the speed of sound is 330 m/s, a 2000 Hz sound wave impinges on two slits 30cm apart. At what angle is the first maximum located
A higway curve with a radius of 400m is banked properly for a car traveling 120km/h. how much sideways force must the tires exert
A sugar solution with n=1.42 contains an air bubble of radius 1.00cm. Where is the image of a sugar crystal 3.00 cm from the bubbles surface when viewed through the center of the bubble? Does the bubble behave like a converging or diverging lens?
A graph of the Force applied to a spring and the distance it stretches F vs. x yields some valuable information. What does the slope of the linear line
Two football players are initially 2m apart. At the same instant they accelerate towards each other, Draw a picture. Define your coordinate system
a liquid of density 1.31 times 103 kgm3 flows steadily through a pipe of varying diameter and height. at location 1
Point A is at a potential of +250 V, and point B is ata potential of –150 V. An Alpha-particle is a helium nucleus that contains two protons and two neutrons; the neutrons are electrically neutral.
A round pipe of varying diameter carries petroleum from a wellhead to a refinery. At the wellhead the pipe\'s diameter is 54.7 cm and the flow speed of the petroleum is 13.9 m/s. what is the pipe\'s diameter at the refinery
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