Show:
Steam Engines
Heat
Work
Scientific Notation and Significant Digits
Thermodynamics
100
What is a steam engine?
Any machine that uses steam to generate mechanical motion
100
What units is heat measured in?
Joules
100
What is work defined as?
A transfer of mechanical energy
100
How many significant digits: 0.07801
4
100
What is thermodynamics?
The study of heat transfers (heat -> moving)
200
What did the early engines all rely on to push water in?
Atmospheric pressure
200
Heat is defined as..
A transfer of thermal energy
200
When you lift a pen to a height you are doing work on it to increase what type of energy in the pen?
Gravitational Potential Energy
200
What is this number in scientific notation? 299000000
2.99x10^8
200
Energy cannot be created or destroyed, but it can be...
Transferred
300
What was the name of the man who improved the steam engine drastically, helping kick off the industrial revolution?
James Watt
300
According to modern theories of heat, what is temperature?
The average kinetic energy of particles in a system
300
You apply a force of 100N to a ball over 10m. What is the Work done on the ball?
1000J
300
If you multiply 2.4 and 6.81, how many significant digits can you show your answer with?
2
300
No process can be 100% efficient. This is a restatement of what Thermodynamic Law?
The Second Law
400
What were the advantages of Watt's engine over previous builds?
1. It did not rely on atmospheric pressure 2. It had a double acting cycle
400
Early theories incorrectly assumed what property of heat?
It was a fluid
400
What force is applied to a mass if it is transferred 160J over 10m
16N
400
What is 4.31x10^-4 in standard notation?
0.000431
400
The first law of thermodynamics is also known as what?
The law of conservation of energy
500
In order to pull water up from mines, early steam engines created what type of pressure system in a container above?
A low pressure system
500
Who were the two men studying the equivalency between heat and energy at the same time, leading to our current understanding?
Mayer and Joule
500
You can calculate the work done on an object from it's Force vs position graph. It is equivalent to..
Area under the curve
500
If you add 89.64 and 27.5 what is the answer, with correct number of significant digits and in scientific notation?
1.1x10^2
500
According to the second law, what type of machine is impossible?
perpetual motion machine