Chapter 12 Concept Review Each table will work as a team to earn points by answering questions. There will be approximately 60 seconds to answer each question from the time I am done reading unless otherwise noted. Answers will be recorded and presented on the whiteboards at each team table. Correct answers will earn the points denoted by the question. Incorrect answers will not be penalized. The choice of category and question will rotate among teams. At Final Jeopardy, each time may wager all of their earned points, or $500, whichever is greater. The winning team will earn 2 points of extra credit each on tomorrow’s test.

Strategy Work together with your team. Talk quietly but discuss possible options. Make sure to write down your solution before time runs out. After each question and answer we will have time to discuss and answer questions.

Jeopardy Simple Harmonic Motion Measuring SHM Properties of Waves Wave Interactions Potpourri Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy

$100 Question from Simple Harmonic Motion Objects that behave according to Hooke’s Law have a restoring force that is proportional to their ______________.

$100 Answer from Simple Harmonic Motion Displacement

$200 Question from Simple Harmonic Motion Objects will continue oscillating in simple harmonic motion indefinitely, trading potential and kinetic energy back and forth, as long as we ignore the effects of _______.

$200 Answer from Simple Harmonic Motion Friction!

$300 Question from Simple Harmonic Motion A pendulum oscillates in simple harmonic motion as long as its amplitude does not exceed what angle measure?

$300 Answer from Simple Harmonic Motion 15 degrees

$400 Question from Simple Harmonic Motion Hooke’s Law is expressed as F = -kx. The negative sign is there because…?

$400 Answer from Simple Harmonic Motion The restoring force is opposite the direction of displacement.

$500 Question from Simple Harmonic Motion Objects oscillating in simple harmonic motion have a maximum velocity at what point?

$500 Answer from Simple Harmonic Motion Equilibrium (the middle!)

$100 Question from Measuring Simple Harmonic Motion _________ is a measure of the time it takes for an object to complete a full cycle (one complete back-and-forth motion). The units of this measure are __________. (must answer both parts correctly)

$100 Answer from Measuring Simple Harmonic Motion Period Measured in seconds

$200 Question from Measuring Simple Harmonic Motion The period of a pendulum depends on its ________.

$200 Answer from Measuring Simple Harmonic Motion Length

$300 Question from Measuring Simple Harmonic Motion The period of oscillation of a mass-spring system depends on which two quantities?

$300 Answer from Measuring Simple Harmonic Motion Mass of the object Spring constant

$400 Question from Measuring Simple Harmonic Motion If the period of an object’s oscillation is tripled, what happens to the frequency? Be specific.

$400 Answer from Measuring Simple Harmonic Motion The frequency is reduced to 1/3 of its initial value.

$500 Question from Measuring Simple Harmonic Motion If the mass in a mass-spring system is doubled, and the spring constant is also doubled, what happens to the frequency? Be specific.

$500 Answer from Measuring Simple Harmonic Motion No change. The increases will cancel out.

$100 Question from Properties of Waves The difference between mechanical waves and non-mechanical waves is that mechanical waves need _________________________.

$100 Answer from Properties of Waves A medium to travel through.

DAILY DOUBLE Write your wagers on your whiteboards! You may risk up to all of your points or 1,000, whichever is greater.

Daily Double from Properties of Waves A single, non-periodic disturbance sent through a substance is called a ___________.

Daily Double Answer from Properties of Waves Pulse wave

$300 Question from Properties of Waves If the frequency of vibration of a medium is increased, what happens to the wavelength?

$300 Answer from Properties of Waves Wavelength is decreased. They are inversely proportional to each other.

$400 Question from Properties of Waves Waves are particularly efficient, because although they do not transfer matter from one place to another, they do transfer _________.

$400 Answer from Properties of Waves Energy

$500 Question from Properties of Waves A spring being stretched and compressed repeatedly is an example of a wave that is _________ and __________. (need both)

$500 Answer from Properties of Waves Periodic and longitudinal.

$100 Question from Wave Interactions When two pulse waves collide and their displacements are the same side of equilibrium, this is called ____________.

$100 Answer from Wave Interactions Constructive interference.

$200 Question from Wave Interactions A wave will be reflected and inverted if the medium through which it is traveling is attached to a _________ boundary.

$200 Answer from Wave Interactions Fixed.

$300 Question from Wave Interactions In a standing wave, the point(s) at which there is maximum displacement from equilibrium is(are) called ___________.

$300 Answer from Wave Interactions Antinode(s)

$400 Question from Wave Interactions What is the resultant displacement at a position where destructive interference is complete?

$400 Answer from Wave Interactions Zero

$500 Question from Wave Interactions A standing wave that has 4 nodes has a wavelength of what fraction of the length of the medium it is traveling through?

$500 Answer from Wave Interactions 2/3 of the length of the medium.

$100 Question from Potpourri Can two waves occupy the same place at the same time?

$100 Answer from Potpourri Of course. This is called interference.

$200 Question from Potpourri Are sound waves mechanical waves or are they non-mechanical waves?

$200 Answer from Potpourri Mechanical. They medium they travel through is air.

$300 Question from Potpourri Two tuning forks with frequencies of 256 Hz and 512 Hz are struck. Which of the sounds, if either, will move faster through the air?

$300 Answer from Potpourri Neither. Wave speeds are constant in a given medium. Frequency and wavelength may change, but not wave speed.

$400 Question from Potpourri How does a single point on a string move as a transverse wave passes by that point?

$400 Answer from Potpourri Up and down. No horizontal movement.

$500 Question from Potpourri If the period of a mass-spring system is 2 seconds, what must be done to the mass of the system to increase the period to 6 seconds?

$500 Answer from Potpourri Increase the mass by a factor of 9. For example, if the mass was originally 4 kg, increase it to 36 kg.

Final Jeopardy Grandfather clocks use pendulums to move gears and keep time. If the clock is running slow, how can you adjust the pendulum to fix the problem.

Final Jeopardy Answer Make the pendulum shorter. Move the bob closer to the pivot point.