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For any steady flow the streamlines and streaklines are the same. For most unsteady flows this is not true. However, there are unsteady flows for which the streamlines and streaklines are the same. Describe a flow field for which this is true.
A laser emits 1.42*1018 photons per second in a beam of light that has a diameter of 1.88 mm and a wavelength of 519.0 nm. Decide each of the following for the electromagnetic wave that constitutes the beam. The average electric field strength
A 72 kg crate is dragged across a floor by pulling on a rope attached to the crate and inclined 15° above the horizontal. If the coefficient of static friction is 0.49, what minimum force magnitude is required from the rope to start the crate moving
When gasoline is burned, it gives off 46,000 J/gram of heat energy. what is the average horsepower output of the engine
Astronaut Rob leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth. How long does it take Rob to complete the trip
Suppose that 33.8 percent of the hammer's kinetic energy is used to do the work of sending the metal piece upward. How fast must the hammer be moving when it strikes the target so that the bell just barely rings?
A 12 Volt battery (potential source) is connected across a 6 µF air filled capacitor. Determine how much energy can be stored his way
The drawing to the left shows a mass m= 1.5 kg hanging from a spring with spring constant k = 10 N/m. What is the time required for the amplitude of the resulting oscillations to fall to one third of its initial value
A block of ice with mass 2.00 kg slides0.685m down an inclined plane that slopes downward at an angle of 38.0?, If the block of ice starts from rest, what is its final speed
a mortar crew is positioned near the top of a steep hill. enemy forces are charging up the hill and it is necessary for
Young David who slew Goliath experimented with slings before tackling the giant. He found that he could revolve a sling of length 0.650 m at the rate of 9.00 rev/s. What is the speed of the stone for each rate of rotation
A 5.080 kg block of wood rests on a steel desk, State the force of friction applied to the block by the table at the following times: t=0 and t>0
One of the most powerful cranes in the world operates in Switzerland. It can slowly raise a load of M = 5230.0 tonnes to a height of h = 12.0 m, How much work is done by the crane
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