Momentum and Energy
Which term is best described as the product of mass and velocity?
Momentum
The crest
Sound waves cannot travel in a _______________.
Vacuum
If the temperature that a sound wave is traveling through is 38.0o C, what would be the speed of sound at that temperature?
v = 331 + 0.6T
354 m/s
Can you name four states that begin with the letter A?
Alabama
Arkansas
Alaska
Arizona
What are at least two of the four types of potential energy that were discussed in class?
Chemical PE
Gravitational PE
Electromagnetic PE
Elastic PE
Which type of wave interference is when the waves are in phase and the resulting amplitude increases?
Constructive interference
What is the highest energy category of waves on the Electromagnetic Spectrum?
Gamme Rays
What would be the wave speed if a wave has a wavelength of 0.004 meters and a frequency of 512 Hz?
v = λf
2 m/s
What’s the smallest country in the world?
a. Vatican City
b. Liechtenstein
c. Tuvalu
d. Monaco
A. Vatican city
The Law of Conservation of Energy states that energy may be converted between forms, but it cannot be ________________ or ________________.
Created; Destroyed
Waves that do not require a medium are called ________________ waves while waves that do require a medium are called _________________ waves.
Electromagnetic;Mechanical
Does the following describe sound waves or light waves:
A longitudinal, mechanical wave
Sound waves
If the frequency of a wave is 850 Hz, what is the period of that wave?
f = 1/T
0.0012 s
Can you draw a line on the board that is within 3 centimeters of a meter?
Challenge accepted and accomplished!
Would the following situation be an open or closed system?
A ball starts on top of a hill. As the ball rolls down the hill, some of the potential energy is converted in kinetic energy and some energy is lost to friction.
Open System
If the frequency of a wave increases, then the wavelength of that wave will __________________.
Decrease
If a sound wave transfers from a liquid to a gas, will it speed up or slow down?
Slow down
How much Kinetic energy does a 0.045 kg ball have when it is thrown at a velocity of 32 m/s?
KE = (1/2)mv2
23 J
There is a taped off square in the front of the room. Can you, with closed eyes, hop on one foot in the square for 15 seconds with hopping out of it?
Challenge accepted and accomplished!
Which of the following units is INCORRECTLY matched with its measurement (You may have more than one correct answer):
Momentum: kg * m/s2
Potential Energy: J
Kinetic Energy: W
Momentum and Kinetic Energy
Hooke's Law is the following --> FR=-kx
What does the negative sign in this formula indicate?
That the displacement of the spring and the restoring force are in opposite directions
What is the speed of all electromagnetic waves?
3.0 x 108 m/s
Use the law of conservation of energy to determine how much kinetic energy an object would have when it hits the ground if the object was at rest on top of a shelf before being dropped off. Assume the object has a mass of 2.00 kg and was dropped from a 5.00 meter height.
PEi + KEi = PEf + KEf
PE = mgh
KE = (1/2)mv2
98.1 J
Can you say the perfect squares of all numbers 1-20 within 15 seconds?
1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361, 400