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1. Sketch the velocity vector V and the normal unit vector nn^ on each area.
(a) The free surface area of a water tank that is being drained.
(b) The inlet area of a turbine.
(c) The wall of a pipe.
(d ) The bottom of a canal.
(e) The inlet area to a cylindrical screen around a drain. 2. A rectangle surrounds a two-dimensional, stationary airfoil. It is at a distance from the airfoil on all sides. Sketch the box containing the airfoil along with the velocity vector V and the normal unit vector nn^ on all four sides of the rectangle.
If the tension in a guitar string is increased by 20%, by what percentage does the wave speed increase? Harmonic waves are produced by a source that isoscillating in SHM. Which one of the following statements is correct concerning harmonic waves?
a helium balloon is used to lift a load of 101 n. the weight of the envelope of the balloon is 49.5 n and the volume of
A 1.65 m length of wire is formed into a single-turn, square loop in which there is a current of 12 A. The loop is placed in a magnetic field of 0.04 T. What is the maximum torque that the loop can experience?
an electron moves with a speed v 10-2c inside a one-dimensional box v 0 of length 0.971 nm. the potential is infinite
In figure, a ball isthrown up onto a roof, landing some time later at heighth = 20.0 m above and d = 30.0 m horizontally from the release point.The ball's path just before landing is angled at θ =60.0o with the horizontal roof.
1.a car uniformly decelerates at a rate of -5.00 ms2. how far does the car travel after 1.50 seconds if it initially
An airplane propeller is rotating at 1900 rpm. What is the period ( in seconds) of this propeller
Additional light oil is poured onto the liquid surface until the top surface of the oil coincides with the top surface of the wood cube (in hydrostatic equilibrium). How thick is the whole layer of the light oil
Two point charges are placed on the x-axis. A charge -q is located at the origin, and a charge -2q is located at x = +d. at what location is the total electric potential zero
A bicycle wheel has a diameter of63.1 cm and a mass of 1.85 kg. What force is required if the chain shifts to a 5.65 cm diameter sprocket
In which one of the following circumstances does the principle of conservation of mechanical energy apply, even though anon conservative force acts on the moving object? The anon conservative force has a component that points in the same direction as..
A skier traveling 12.0m/s reaches the foot of a steady upward18.0 degree incline and glides 12.2m up along this slope beforecoming to rest. What was the average coefficient of friction
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