Jeopardy 0515FinalExam4jeopardyRvw

1. Jeopardy 0515FinalExam4jeopardyRvw Projectiles Energy Sound EM Spect Mixed $100 $100 $100 $100 $100 $200 $200 $200 $200 $200 $300 $300 $300 $300 $300 $400 $400 $400 $400 $400 $500 $500 $500 $500 $500 Final Jeopardy

2. When a projectile is shot upward, the vertical velocity is always 9.8 m/s2. a. true b. false c. never B. false, when thrown up: at the top its velocity is zero. 1 - $100

3. 1 - $200 • A ball is thrown into the air at some angle. At the very top of the ball’s path, its velocity is a. all horizontal b. all vertical c. both x & y • a. all horizontal, the vertical gravity is a zero changing from -9.8 to + 9.8

4. 1 - $300 • A ball is thrown straight upward at 20 m/s. If no air resistance, the ball will return to the thrower’s hand at what speed? • 20 m/s, same up and same down

5. 1 - $400 • A package is dropped from a plane traveling horizontally at 200 m/s. It falls into the water 4 seconds later. How far will it travel horizontally? • 800 m, 200 m each second for 4 seconds.

6. 1 - $500 • A package is dropped from a plane traveling horizontally at 200 m/s. It falls into the water 4 seconds later. How high was the plane? • dy = ½ g t2 : 78.4 m = 0.5(9.8)(4)2

7. 2 - $100 • Which type of energy is “energy in motion”? • Kinetic energy

8. 2 - $200 • If you decrease the velocity of an object by one half, how does that change its kinetic energy? • ¼th , velocity is a square relationship (1/2)2

9. 2 - $300 • What is the formula for kinetic energy? • KE = ½ m v2

10. 2 - $400 • What is the formula for Gravitational Potential Energy? • GPE = m g h

11. 2 - $500 • When given a force, what formula is used for GPE? GPE = F x h

12. 3 - $100 • Sound travels in which type of wave? • a. transverse b. longitudinal c. surface • Longitudinal, compressions of air transfer

13. 3 - $200 • Which state of matter makes a medium in which sound travels the fastest? • Solid, • molecules closer and directly influence each other

14. 3 - $300 • The Doppler Effect is a change in picth due to the listener or the source or both moving toward or away from each other. The human perception of pitch is in reference to the ______ of a wave. • Frequency

15. 3 - $400 • What is the normal hearing range for humans? • 20 – 20 000 vibrations per second

16. 3 - $500 • What unit is used to measure sound intensity? • Decibels, measures the ‘loudness’, --- bells, loud

17. 4 - $100 • Electromagnetic waves of light are which type of wave? • a. transverse b. longitudinal c. surface • Transverse, • traveling perpendicular to wave direction

18. 4 - $200 • Picking from the main 7 bands of the Electromagnetic spectrum, which band has the longest wavelength? • Radio waves

19. 4 - $300 • What is the pneumonic device used to remember the colors of the rainbow? • R O Y G B I V

20. 4 - $400 • Which of the seven bands of the visible light spectrum is the most frequent? • violet

21. 4 - $500 • What is the speed of light? • 300 000 km / sec.

22. 5 - $100 • When two objects collide and they bounce away from each other, the collision is classified as elastic inelastic unsticky • Elastic, bounce or return to original shape

23. 5 - $200 • At what vertical angle will a projectile achieve maximum horizontal distance? • 45o, 45 up and 45 down.

24. 5 - $300 • How much of a sample remains after 2 half lives? • 1/4 th the original

25. 5 - $400 • What is the term for a measurement of frequency per second for waves? • Hertz = Hz

26. 5 - $500 • What is the name of the longitudinal wave part that corresponds to the transverse trough? • Rarefaction, the spaced out portion

27. Final Jeopardy • A car traveled 50 km in 2 hours, 40 km in the next hour, then 60 km in 2 hours. What is the cars average speed? • 30 km/hr; 150km/5 hrs