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Water enters a horizontal pipe with a rectangular cross section at a speed of 1 m/s. The width of the pipe remains constant but the height decreases. Eighteen meters from the entrance, the height is half of what it is at the entrance. If the water pressure at the entrance is 1660 Pa, what is the pressure 18 m downstream?
A wheel starts from rest and rotates about its axis with constant angular acceleration. What is the angular acceleration of the wheel
A hot air balloon is a bit like a bubble in water. It rises in air when the mass of relatively cool surrounding air displaced by the balloon is greater than the mass of the balloon and the gondola that hangs below it.
23 kg of a liquid metal with a latent heat of fusion of 53.12 kJ/kg freezes while at its melting temperature of 354 °C. Calculate the change in entropy of the metal
A parallel-plate capacitor is constructed using a dielectric material whose dielectric constant is 3.90 and whose dielectric strength is 1.80 multiply.gif 108 V/m. Find the minimum area of the capacitor plates
A person is riding a bicycle, and its wheels have an angular velocity of 18.5 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is 17.5 revolutions. (a) How much time..
a standing wave has a wavenumber 2.26*10^2 rad/min. What is the distance between the adjacent nodes
Closed gaussian surfuce in the shape of a cube of edge length 2.00 m, with one corner at x=5.00m, y=4.00m, what is the net charge contained by the cube
The gravitational acceleration on the Moon is a sixth of that on Earth. The weight of an apple is 1.03 N on Earth. (a) What is the weight of the apple on the Moon? (b) What is the mass of the apple?
A day-care worker pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a spinning rate of 20.4 rpm in 11.0 s. Calculate the torque required to produce the acceleration
Tim and Rick both can run at speed and walk at speed, with. They set off together on a journey of distance. Rick walks half of the distance and runs the other half. Tim walks half of the time and runs the other half.
Two capacitors are identical, except that one is empty and the other is filled with a dielectric (k = 5.0). What must be the potential difference across the plates of the capacitor filled with a dielectric
The magnitude of the tidal force exerted on an object of mass m and length a is approximately 4GmMa/r3. find the tidal force exerted on your body by the black hole
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