Show:
Waves
Pendulums
Springs
Sound
Trivia
100
How are frequency, wavelength, and velocity of a wave related?
v = fh
100
On Earth, what variable causes the period of a pendulum to change?
Length
100
On Earth, what variable causes the period of a vertically oscillating spring to change?
Mass
100
What is the speed of sound at room temperature?
343 m/s
100
What does SHM stand for?
Simple Harmonic Motion
200
If the frequency of a wave doubles, what happens to the velocity?
Nothing!
200

Find the period of a 0.4 m pendulum on the moon if g on the moon is 1.625 m/s2

T = 3.1 seconds
200
The law stating that the restoring force is proportional to the displacement of a spring (F = -kx) is known as ________
Hooke's Law
200

Find the wavelength of a sound wave if its frequency is 440 Hz (use 343 m/s for the speed of sound)

0.78 m
200
How does a tuning fork create sound?
The tines or prongs vibrate, creating longitudinal waves
300
If the frequency of a wave doubles, what happens to its wavelength?
It reduces by a scale factor of 2 (it's cut in half)
300
A 500 kg wrecking ball hangs on a chain 15 m in length. Arnold builds an identically long pendulum using a 0.015 kg marble. Which pendulum has a shorter period if both are released from the same angle?
They have the same period!
300

Find the period of a spring that makes 30 oscillations in 15 s

0.5 s

300

What type of wave does sound create?

Longitudinal Wave

300

What two types of wave interference are there?

Constructive and Destructive

400
What type of wave does not require a medium to travel through?
Electromagnetic waves
400
Find the length of a pendulum on Earth whose period is 4 seconds.
L = 3.97 m
400

Find the spring constant for a spring that stretches 0.2 m when a 0.05 kg mass is attached to it

2.45 N/m

400
Isaac screams down a 50 m hallway and hears his echo 0.3 s later. What is the speed of sound in the hallway?
333 m/s
400

What is it called when the harmonic frequency of an object is matched? Think of glasses shattering, bridges breaking...

Resonance

500
Star Wars depicts space battles as being loud and explosive. Explain why a battle in space, even with lasers and death stars, would have no sound.
Sound requires a medium to travel through...so sound cannot travel in space, which is mostly a vacuum
500
Find g on an unknown planet if a pendulum of length 1 m oscillates 14 times in 40 seconds.

g = 4.84 m/s2

500
Find an unknown mass on a spring whose spring constant is 9 N/m that oscillates 22 times in 7 seconds
.023 kg or 23 g
500
Isaac screams down a 300 m hallway and hears his echo 0.59 seconds later. What is the temperature in the hallway?
40 C
500
What is my favorite animal?
Sloths, duh!