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water travels through a 9.6 cm diameter fire hose with a speed of 1.3 m/s. At the end of the hose, the water flows out through a nozzle whose diameter is 2.5 cm.
a) what is the speed of the water coming out of the nozzle?
b) what nozzle diameter would be required to give the water a speed of 21 m/s? answers are a) 19 m/s b)d2=2.4 cm
A point particle that has a charge of 18.5 µC is located at x = 0, y = 0 and a point particle that has a charge q is located at x = 14.8 cm, y = 0. The electric force on a point particle that has a charge of 7.4 µC at x = 29.6 cm, y = 0 is -(19.7)..
A parallel plate capacitor consists of 2 square plates 19 cm per side spaced .55 mm apart with only air between them. What is the maximum energy that can stored by the capacitor
A 52dB sound wave strikes an eardrum whose area is 5.0×10?5m^2. How much energy is received by the eardrum per second
Steel Piano string, The lowest note on a grand piano has a frequency of 27.5 Hz. The string is 2 m (more or less; let's just assume it is exactly 2.000 m) long, and its tension is 1000 N (again, more or less, so let's say it's exactly 1000 N).
An air molecule is moving at a velocity of 444 m/s. How various meters would the molecule move during 7.00 ms (milliseconds) if it didn't collide with any other molecules.
A sled starts up an incline of 350 with the horizontal. The sled starts from the bottom with an initial velocity of 5 m/s. (a) How far u p the incline does it go? A second sled starts to slide from the top when the first sled starts to slide down...
A meterstick is moving by an observer in a diretion parallel to its length. what is the measured length in the reference frame of the observer
What is the kinetic energy of α particle while it reaches the other plate? The distance between the plates is 33 cm.
A 4m long, 140g rope is fixed at one end while the other is tied to a light string. what is the frequency of the third harmonic
A 50 hard-boiled egg moves on the end of a spring with force constant . It is released with an amplitude 0.300 . A damping force acts on the egg. After it oscillates for 5.00 , the amplitude of the motion has decreased to 0.100.
A massless string runs around two massless, frictionless pulleys. An object with mass m = 12.20 kg hangs from one pulley. A force F is exerted on the free end of the string. What is the magnitude of the force F if the object is lifted at the constant..
A man takes his dog out for a walk. The dog has no legs and is dragged along sidewalk on a little sled (mass of dog + sled = 13.0kg). The sidewalk exerts a frictional force of 14.0N.
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