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A U-tube open at both ends is partially full w/ water. Oil (p=750 kg /m3) is then poured into the right arm and forms a column L = 5.00cm high. a) Decide the difference h in the hi=eights of the two liquid surfaces. b) The right arm is then shielded from any air motion while air is blown across the top of the left arm until the surfaces of the two liquids are at the same height. Decide the speed of the air being blown across the left arm. Suppose the density of air is 1.29 kg / m3.
An energy-efficient lightbulb, taking in 23.0 W of power, can produce the same level of brightness as a conventional bulb operating at power 100 W. The lifetime of the energy-efficient bulb is 10,000 h and its purchase price is $17.00, whereas the..
You do 9.5J of work to stretch a spring with k=210N/m, starting with the spring unstretched. How far does the spring stretch
a 6.00 capacitor that is initially uncharged is connected in series with a 4500 resistor and a 506emf source with
A man is to pull a 50 .0 kg crate across a level terrain with a force of 50.0 N. What is the coefficient of kinetic friction, if the work done by friction is - 4.30 x 102 J
If the entrance velocity into the pipe is 12.5 m/s, what is the rate of flow of the material (air) 'Rm'? What is the velocity 'Vf' when the air is ejected into the surroundings at 1 atm through a nozzle
Find positions of four charges in a plane (+1C, -1C, +2C, -2C) that result in an equilibrium (zero net force on each charge). Report positions as four (x,y) pairs.
A large pendulum with a 200-lb gold-plated bob 12 inches in diameter is on display in the lobby of the United Nations building. Find what is the least amount of time it takes for the bob to swing from a position of maximum displacement to the equili..
In the figure, a slab of mass m1 = 19kg rests on a frictionless floor, and a block of massm2 = 12 kg rests on top of theslab. Between block and slab, the coefficient of static friction is 0.30, and the coefficient of kinetic friction is 0.20.
When 2.50 Amp passes along a 2.60 meter length of straight wire that is entirely immersed in a uniform B-field, Find how strong is the field
Michelle is enjoying a picnic across the valley from a cliff. She is playing music on her radio, what is the intensity of the music arriving at the cliff
A test rocket is fired vertically upward from a well. A catapult gives it an initial velocity of 79.5 m/s at ground level. Subsequently, its engines fire and it accelerates upward at 4.10 until it reaches an altitude of 920 m. At that point its engin..
On an exo-planet, a 70-kg astronaut steps on a scale and finds that the scale reads 246 N. A survival pack is dropped a distance 85 m to the ground. How fast will the survival pack be moving just before it hits the ground
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