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Why does a pendulum eventually stop?
Because the air resistance is acting against it, so each time it swings, the pendulum will come up less high.
Joule.
Heat transferred from one particle to another without the movement of matter itself is called what?
Conduction
What type of waves move particles of the medium parallel to the direction that the wave is traveling in?
Longitudinal waves
If a wave has a velocity of 330 m/s and a wavelength of 6 m, what is its frequency?
1) V= 330 m/s Wavelength= 6 m F= ?
2) Frequency= velocity/wavelength
3) Frequency= 330 m/s divided by 6 m
4) Frequency= 55 Hz
What is the only type of energy not associated with the particles of an object?
Mechanical energy.
Why do bare feet/dogs feel colder on tile than on carpet?
Tile is a better conductor than carpet.
Out of these: 100F, 100C, 100K, which has the highest temperature?
100C
What determines the loudness of a sound?
Amplitude
What is a Machmeter and what is an equivalent piece of equipment?
It tells the speed of an object compared to the speed of sound; the equivalent piece of equipment is a speedometer in a car
What is work measured in? What is power measured in?
Joules (J); Watts (W)
What is the definition of temperature?
The average kinetic energy of the particles of an object.
Why does a bimetallic strip in a thermostat bend as it is heated?
Because the two metal strip expand at different rates (thermal expansion).
If a sound is moving towards you, what changes about its pitch?
The pitch sounds higher as it moves towards you
If someone blows across a test tube with a lot of water in it, will it create a high/low pitch? Why?
A high pitch, because the column of air in the tube is short, and the sound in a wind instrument depends on the column length. The shorter the column, the higher the pitch and frequency.
How can the efficiency of machines be improved?
By oiling and greasing machines to decrease friction
Why does metal feel colder than wood even though both are at the same temperature?
Because metal is a better conductor.
What is heat?
The transfer of energy from a warmer object to a cooler object
Sound travels the slowest in what state of matter?
Gas
What is the measure of the energy in a wave?
Amplitude
What are three examples of how doing work on an object can cause its energy to increase?
You can:
1) Lift it (give it gravitational potential energy)
2) Move it (give it kinetic energy)
3) Change its shape/condition (elastic potential energy)
In the paper clip lab, what happened when we bent the paper clip and why?
Our hand did work on the paper clip and gave it the ability to transfer thermal energy.
Why does the inside window pane in your house feel cold to touch on a winter night?
Because the warm from the inside is being conducted to the outside
How do you find the amplitude of a longitudinal wave?
You measure how dark its compressions are.
When the crest of one wave overlaps the crest of another wave, a _______ interference occurs.
Constructive