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A duct has an initial cross-sectional area of 0.58 m2. If the initial velocity of the air moving through the duct is 9.5 m/s, find what does the cross-sectional area have to be to increase the velocity to 15.0 m/s? Suppose a constant density of 1.1 kg/m^3.
A diver performing a double somersault spins at an angular speed of4.9π rad/s precisely 0.70 s after leaving the platform.assuming the diver begins with zero initial angular speed andaccelerates at a constant rate,
Two waves of the equal frequency have amplitudes 2.13 and 1.36. They interfere at a point where their phase difference is 58.5 degree. Determine what is the resultant amplitude
A circular platform is supported by 8 identical steel wires. The platform and its uniformly distributed load has a total mass of 3.7 kg. The breaking stress of steel is 7.50 x 108 pascals.
You bike at 10.3 m/s directly away from your neighbor\'s trumpet sound and toward the sound of another neighbor\'s trombone, What frequency is the trombonist producing
The team monitoring a space probe exploring the outer solar systemfinds that radio transmissions from the probe take 4.50 hours to reach earth. How distant (in meters) is the probe
what was the speed of the bullet at impact with block.
Four Identical masses of 500.0g are placed at the corners of a square, distance 0.50 m apart. Find the magnitude of net gravitational force exerted by three masses
A ball is shot from the ground into the air. At a height of 9.60 m, the velocity is observed to be v = (7.70 m/s) i + (7.00 m/s) j. What is the maximum height that the ball will rise
A hammer strikes one end of a thick iron rail of length 5.83 m. A microphone located at the opposite end of the rail detects two pulses of sound, Which pulse reaches the microphone first
Gasoline contains predominately octane (the "octane" value quoted on the pump is approximately equal to the percent of octane in the gasoline).
an automotive starter motor is designed to draw a current of 100a from an ideal voltage source of 12v. the starter is
In an industrial cooling process, water is circulated through a system. If the water is pumped with a speed of 0.45 m/s under a pressure of 400 torr from the first floor through a 6.0-cm diameter pipe, what will be the pressure on the next floor 4.0 ..
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