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SMDEP Physics

Explore the physics of fluids and electromagnetic radiation with examples like Bernoulli's principle and wave frequencies. Visit our website for more information.

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SMDEP Physics

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  1. SMDEP Physics Fluids: Bernoulli Electromagnetic Radiation http://www.astro.yale.edu/krines/smdep

  2. 70 39 0 Ch 32, #14: frequency of wave, classification • 1.2 x 106 Hz, radio • 3.5 x 105 Hz, radio • 255 Hz, radio • 3.5 x 1014 Hz, infrared • Other • Didn’t finish

  3. 41 of 70 0 Ch 32, #18: how many wavelengths in one pulse? • 85,000 • 85 • 850 • 8500 • Other • Didn’t finish

  4. 41 of 70 :00 Ch 33, #9: double mirror, ray diagram • Sketched it, understand it, didn’t try it • Sketched it, understand it, tried it and it works! • Other • Didn’t finish

  5. 0 41 of 70 Consider an object that sinks in oil but floats on water. When the object floats on water, half of the object is submerged. If oil is now poured slowly on top of the object until the oil covers the object, the object: • Moves up (relative to the water) • Moves down deeper in the water • Remains in the same place

  6. 0 42 of 70 A boat floats in a small pond. A person on the boat throws a heavy boulder out of the boat and it sinks to the bottom of the pond. Does the water level in the pond rise or fall (with respect to the shore)? • Rise • Fall • Remain the same • Can’t tell without knowing density of rock

  7. 5 0 :10 A 200-ton battleship enters a lock. The ship fits in so tightly in the lock that only 100 tons of water is trapped in the lock. Can the ship still float if the quantity of water left in the lock is less than the weight of the ship? • Yes, as long as there’s enough water to reach the ship’s waterline. • No, the ship touches bottom because it weighs more than the water in the lock.

  8. 5 0 10 A circular hoop sits submerged in a stream perpendicular to the flow of water. If the area of the hoop is doubled, what happens to the flux (volume of water per unit time) through the hoop? • It decreases by a factor of 4 • It decreases by a factor of 2 • It remains the same • It increases by a factor of 2 • It increases by a factor of 4

  9. 5 0 10 Fluid flows through a pipe of uniform cross-section. What is the speed of the fluid at the top of the tube relative to the speed at the bottom of the tube? • The speed is greater at the top • The speed is greater at the bottom • The speed is zero at the top • The speed is the same at the top and bottom.

  10. 5 0 10 Two pipes are connected to the bottom of a large water tank and bent upwards to produce a fountain (both fountains start from the same height). One pipe is pinched off to form a nozzle, while the other is left open. Water squirts: • Above the water level in the tank from the pinched pipe, below it for the open one • Up to the water level of the tank for both • Equally high for both, but less than the water tank level • Higher from the pinched pipe, but lower than the water tank level for both

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