Physics

I. If an object oscillates with a frequency of 10 Hz, how long does it take to complete one cycle? A mass oscillates on a spring with a frequency of 5 Hz. 2. What is the period of the oscillation? 3. How many cycles does it go through in 2 s? 4. How many cycles does it go through in 0.6 s? 5. Light waves in vacuum travel at a speed of 300,000 km/s. The frequency of some red light (an 014 electromagnetic wave) is 4.62*l Hz. What is the wavelength of this light in nanometers? (Note: 1 nanometer: 1 nm = l"'lO'9 meters) How would the intensity you receive from a point sound source vary if you 6. moved four times as far from the source? 7. moved to one-third of the original distance? A weight suspended from a spring is seen to bob up and down over a total distance of 20 centimeters twice each second. 8. What is the frequency? 9. What is the period? 10. What is the amplitude? I]. A sound wave is traveling at 340 m/s and has a wavelength of 40cm. What is its frequency? 12. A beam of light, traveling at speed 3* 108m/s, has wavelength 420 nm. What is its frequency? 13. A wave travels along a rope. It has 5 waves per second, and the wave peaks are each 60cm apart. What is the speed of the wave? 14. A water wave travels from Hawaii to California across 2000 miles of ocean. True or false: This implies that the water in the crest has traveled 2000 miles. 15. If a mass on a spring takes 6 s to complete two cycles. what is its period? 16. A mass oscillates up and down on a vertical spring with an amplitude of 4 cm and a period of 2 see. What total distance does the mass travel in 10 sec? 17. You observe that 25 crests ofa water wave pass you each minute. Ifthe wavelength is 10 m, what is the speed of the wave? 18. If the breakers at a beach are separated by 5 m and hit shore with a frequency of 0.3 Hz, at what speed are they traveling? 19. What is the distance between adjacent crests of ocean waves that have a freqency of 0.2 Hz if the waves have a speed of3 m/s? 20. What is the period of waves on a rope iftheir wavelength is 0.8 m and their speed is 2 m/s