Machinery
What is power?
What is heat?
A form of energy that flows from a place of high temperature to a place of lower temperature.
What is conduction?
The movement of electricity or heat through a substance.
What does insolation do?
Can help prevent heat loss. (like thermoses) Also reduces heat transfer.
What effects the expansivity of a substance and why?
If intermolecular forces are stronger, you will need more heat energy to expand the substance
Bonus! (not really related to Machines but...) What is expansivity?
The extent of the expansion of a substance when it is heated.
What is temperature?
A measure of how much heat energy is present in a substance.
What is expansivity?
The extent of the expansion of a substance when it is heated.
What does an engine do?
Engines convert energy stored in fuel into movement.
What is the difference of an internal combustion engine and a steam engine? (hint: location of engine is important here)
International combustion inside the machine
While the steam engine is located on the outside
What is the Internal combustion engine? (and what does it burn?)
An engine that generates power for movement through the burning of fuel, such as coal, gas, or oil, and air.
The degree of disorder in a given system.
What does heating do to an object? Does it...
a) Expand
b) Contract
c)Or stay the same
Bonus! Why does it do this?
A) Expand!
Simple answer: They do this because the kentic energy of atoms increases causing them to bump into walls and want more space: Expansivity
What is combustion?
Combustion releases energy in fuel by burning. Like a car engine.
What are the 3 temperature measurements?
1)Celsius (°C)
2) Fahrenheit (°F)
3) and Kelvin (K)
What is a steam engine? (it's a long answer)
An engine that generates power for movement through the use of steam, which rapidly expands and condenses.
What is radiation? (two answers)
1) heat energy emitted by a solid object
2) A steam of particles from a source of radiation
What direction does heat flow?
From the hot object to the cooler object.
What is the difference between heat and temperature?
Heat is the energy off of thermal objects and flows from one place to another. While Temperature is the measurement for heat.
Understand how a bi-metallic strip thermometer works (and what it’s made of) (2 Part question)
The thermometer has a strip with 2 different metals with different expansivities.
What is an ideal gas?
A theoretical gas whose gas molecules occupy a negligible space and have no interactions, meaning it obeys the gas laws exactly.
What is Absolute Zero? (long answer and wordy)
Theoretically, the lowest possible temperature or the point at which molecular motion virtually ceases to exist.
What is Convection? (longest answer yet!)
The movement within a fluid that is caused by the tendency of the hotter material to rise and the cooler material to sink which results from the transfer of heat. (like boiling water)
Write the 3 different ways heat travels. Also, it's on the google slides for further study.
1) Conduction
2) Convection
3) Radiation
You need to be able to write the Laws of thermodynamics? Hint there are four.
(If you get them all without help or stealing you get an additional 150 points)
Zeroth: When 2 systems are in equilibrium with a 3rd system, they are said to be in a thermal equilibrium, with each other.
First: Energy cannot be created or destroyed (law of conservation of energy)
Second-Disorder (entropy) in the universe is always increasing
Third- There is a theoretical point at which all molecular movement stops, which is known as absolute zero