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Question: Water is moving with a speed of 4.7 m/s through a pipe with a cross-sectional area of 4.3 cm2. The water gradually descends 7 m as the pipe increases in area to 8.2 cm2. (a) What is the speed at the lower level? 2.46m/s (b) If the pressure at the upper level is 2.0x10^5Pa, what is the pressure at the lower level in Pa?
An audio amplifier, represented by the AC source and the resistor R, what is the time-averaged power delivered to the speaker
Two capacitors give an equivalent capacitance of 9.00 pF when connected in parallel and an equivalent capacitance of 2.00 pF when connected in series, What is the capacitance of each capacitor
You have a 200-ohm resistor, a 0.400-H inductor, and a 6.00-uf capacitor. Suppose you make a series circuit with the resistor, What is the phase angle of the source voltage with respect to the current
A gob of clay, mass 217 g, falls from rest a distance 50 cm before striking and sticking to the edge of a wheel free to rotate about a horizontal axis through its center.
A charge q = +929 ?C is uniformly distributed on a thin nonconducting ring of mass m = 0.60 g and radius r = 2.60 cm. What is the final angular velocity of the ring
A girl delivering newspapers covers her route by traveling 4.00 blocks west, 6.00 blocks north, and then 5.00 blocks east. (a) What is her resultant displacement?
A converging lens is located 10.0 cm to the left of a diverging lens. The focal length of the converging lens is +20.0 cm. where is the final image formed by the diverging lens
You have the urge to connect to nature and become a hunter who uses a slingshot. You make a slingshot from a 50cm long piece of rope in which you put a m=50 g stone, How long is the stone in the air
An 0.8kg baseball with an initial velocity of 40m/s is hit with a baseball bat so that its recoil velocity is 60m/s in the exact opposite direction. what is the average force the bat puts on the ball
a 55 kg person is at rest at the left end of a floating 180kg log. It starts to run toward the other end with a velocity 2.2m/s relative to the still water. what is the velocity of the log
Suppose the distance from the lens system of the eye (cornea + lens) to the retina is 18 mm. What must the power of the lens be when looking at distant objects
The moon's diameter is 3.48 x 10 6 m, and its mean distance from the earth is 3.85 x 10 8 m. what is the diameter of the moon's image on the screen
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