Springing into Spring
What is the unit for the spring constant
Newtons per Meter (N/m)
What is the unit for period?
seconds
What is the unit for frequency?
Hertz (Hz) (1/s)
What is the SI unit for intensity?
Watts per meter squared ( W/m^2 )
What is the more coming unit for sound levels?
What is Hooke's Law?
F=-kx
What do we call the mass at the end of a pendulum?
The Bob
What factor do we find when comparing SHM to uniform circular motion
2pi
What type of wave is sound?
Longitudinal Wave
What do we call the first harmonic/0th overtone?
The fundamental frequency
What is required for an object to undergo simple harmonic motion?
The net restoring force must be proportional to the negative of the displacement
What approximation do we make for a pendulum to undergo SHM?
The small angle approximation // sin(theta) approx theta
Waves that appear to be standing still are called...
Standing Waves
Would Sound travel faster in hot air or cold air?
Hot air
If a piano tuner hears 4 beats per second when using a 512 Hz tuning fork, what are the possible frequencies of the piano string?
508 Hz and 516 Hz
What would be the period of oscillations for a 5kg mass, attached to a spring that has a spring constant of 30N/m?
2.6 seconds
What two factors determine the period and frequency of a pendulum?
Length of the pendulum and the acceleration due to gravity.
What type of wave requires a medium to move through
Mechanical Waves
What property of sound changes based on the medium that it travels through
The speed of sound
What causes sonic booms?
An object moving at or beyond the speed of sound. The sound interferes constructively and forms a large pressure wave.
Where is the speed of a mass on a spring at its maximum?
At the equilibrium point
What would be the period of a 2m long pendulum on Earth?
2.8375 seconds
What type of wave is formed when the oscillation is perpendicular to the wave motion
Transverse
An increase of 30 decibels represents an increase in intensity by a factor of...
1000 // 10^3
What is the range of frequencies humans can hear (on average)
20Hz to 20,000 Hz
Where is the energy of a mass on a spring the greatest?
Everywhere // The energy remains constant
A grandfather clock is "losing" time, how could we fix this?
Shorten the pendulum
What happens when two waves meet completely in phase?
They build on each other // They add together // They interfere constructively
What is the doppler effect
a change in frequency from the movement to or away from a source
What length of open tube is required to resonate at the fundamental frequency of a sound that has wavelength of 2.5 meters
1.25 meters