Phun with Physics

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Across
  1. 2. A 10-Ω resistor is connected in parallel to another resistor R . The equivalent resistance of the pair is 8 Ω. What is the resistance R?
  2. 4. Which of the following terms is a useful quantity to describe the loudness of a sound?
  3. 5. Rays Which form of EM radiation has the most penetrating ability?
  4. 6. To compare the brightness of light bulbs for sale in a store, you should look on the labels to see how they are rated in terms of ____.
  5. 8. Which part of the eye has the greatest density of light receptors?
  6. 10. How much current will flow through a 10-V battery with a 100-Ω resistor connected across its terminals?
  7. 13. In geometric optics, a straight line emerging from a point is called a (an) ________.
  8. 14. What is added together when two waves superimpose?
  9. 15. Which of these is not a characteristic of a wave?
  10. 17. What is the slope of a straight line graph of position vs. time?
  11. 18. Which of the following would describe a length that is 2.0×10−3 of a meter?
  12. 21. A change in which of the following is an example of deformation?
  13. 22. Which parameter of a wave gets affected after superposition?
  14. 23. Suppose that a bathroom scale reads a person’s mass as 65 kg with a 3 percent uncertainty. What is the uncertainty in their mass in kilograms?
  15. 24. True or False—The direction of the resultant vector depends on both the magnitude and direction of added vectors.
  16. 26. A neutral hydrogen atom has one proton and one electron. If you remove the electron, what will be the leftover sign of the charge?
  17. 28. Four bicyclists travel different distances and times along a straight path. Cyclist 1 travels 95m in 27s. Cyclist 2 travels 87m in 22s. Cyclist 3 travels 106m in 26s. Cyclist 4 travels 108m in 24s. Which cyclist traveled with the greatest average speed?
  18. 29. True or false—Voltage is the common word for potential difference, because this term is more descriptive than potential difference.
  19. 31. What power is dissipated in a circuit through which 0.12 A flows across a potential drop of 3.0 V?
Down
  1. 1. If a biker rides west for 50 miles from his starting position, then turns and bikes back east 80 miles. What is his net displacement?
  2. 3. A charge distribution has electric field lines pointing into it. What sign is the net charge?
  3. 6. When a large body of experimental evidence supports a hypothesis, what may the hypothesis eventually be considered?
  4. 7. A bullet in a gun is accelerated from the firing chamber to the end of the barrel at an average rate of 6.30×105 m/s2 for 8.10×10−4 s. What is the bullet’s final velocity when it leaves the barrel, commonly known as the muzzle velocity?
  5. 9. What is a physical quantity that can be described by dynamics but not by kinematics?
  6. 11. What is the term for the minimum angle at which a light ray is reflected back into a material and cannot pass into the surrounding medium?
  7. 12. True or False—A rocket is launched into space and escapes Earth’s gravitational pull. It will continue to travel in a straight line until it is acted on by another force.
  8. 16. A light bulb has an illuminance of 19.9 lx at a distance of 2 m . What is the luminous flux of the bulb?
  9. 19. Observation of which phenomenon can be considered proof that something is a wave?
  10. 20. If a velocity increases from 0 to 20 m/s in 10 s, what is the average acceleration?
  11. 25. What is used to represent an object in a free-body diagram?
  12. 27. A large rock is ejected from a volcano with a speed of 30m/s and at an angle 60∘ above the horizontal. The rock strikes the side of the volcano at an altitude of 10.0m lower than its starting point. Calculate the horizontal displacement of the rock.
  13. 30. What is the observed frequency when the observer is moving away from the source at 125m/s? The source frequency is 237Hz, and the speed of sound is 325m/s.