Sound & Waves
What is sound?
A vibration that travels and disturbs a medium.
What is the equation for Displacement?
Final Position - Initial Position
What is the equation for gravitational potential energy.
GPE=Weight (m) * Gravetational Force (g) * Height (h)
What are the three types of Heat Transfer?
Conduction, Convection, Radiation
Newton’s first law states that an object will remain in motion unless what happens?
An outside force acts upon it.
What is the range that humans can hear in Hz.
20-20,000 Hz
What is the equation for speed?
What is the equation for Work?
Force * Displacement
What is Convection, Conduction, and Radiation?
Convection- Transfer of Heat by fluids.
Conduction- Transfer of Heat by direct touch.
Radiation- Transfer of Heat through waves.
When a book slides across a table, the book eventually comes to a stop. What causes this event to happen?
Friction
The intensity of a sound wave is directly proportional to?!??
The Amplitude squared.
What is the formula for acceleration?
(Final velocity - Initial velocity) / Time
What is the equation for Power?
Work / Time
What is the equation for Heat Energy?
Heat Energy (Q) = Specific Heat (Cp) * Change in Temperature (T2 - T1)
Which has more inertia: A car or a truck?
Truck
Which property of a wave is independent from the others. Amplitude, Wavelength, Speed, Frequency
Amplitude
What is the acceleration of a car going 85 mph to 60 mph in 1.5 seconds?
-16.7 mph
Just before striking the ground, a 2.0-kg mass has 400 J of KE. If friction can be ignored, from what height was it dropped?
20.0 m
Is wood or steel a better conductor?
Steel, It has a lower Specific Heat Capacity
According to Newton’s 2nd law, acceleration is related to what two quantities?
The net force acting upon the object and the mass of the object.
What is the formula for wave speed?
Wave Speed (V)=Frequency(Hz) * Wavelength in meters(λ)
A House Fly has an acceleration of 73 mph and it travels for 32 seconds. How many miles does it travel in 32 seconds?
0.6488889
Compute the power output of a machine that lifts a 500-kg crate through a height of 20.0 m in a time of 60.0 s.
0.167 KW
A liquid with a specific heat of 1,900 J/kg °C has 4,750 joules of heat energy is added to it. If the temperature increases from 20 °C to 30°C, what is the mass of the liquid.
0.25 kilo
Newton’s third law states that every __________ has an __________ and __________ reaction.
action, equal, opposite.