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Course: NOVA Labs > Unit 1
Lesson 5: Energy- Growing appetites, limited resources
- Growing appetites, limited resources quiz
- Energy defined
- Energy defined quiz
- Putting energy to use
- Putting energy to use quiz
- Never-ending supply
- Never-ending supply quiz
- Solar power
- Solar power quiz
- Wind power
- Wind power quiz
- Solving the storage problem
- Solving the storage problem quiz
- Toward a smarter grid
- Toward a smarter grid quiz
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Energy defined
There are textbook definitions of energy, and then there's the energy we experience in our daily lives. So what is energy, and why are we on a never-ending search for new sources?
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- How is energy quantified or measured?(4 votes)
- It depends on the type of energy you want to measure. Thermal energy for example is measured in degrees (in Kelvin, Fahrenheit or Celsius for example). Heat, is generally measured in kilo-calories or joules, So every type of energy has different ways to measure them.
How they are quantified is also dependent on the type of energy you are measuring. Potential energy for example is PE (potential Energy) = mass X gravity X height, while kinetic energy (energy of an object in motion) is KE = .5 x mass x velocity. And these are just a few of the various forms of energy.(7 votes)
- i want to know that why do they tack power(3 votes)
- if you mean tax, then here is your answer. it costs money to convert energy from one form to another.(2 votes)
- Why is there potential energy when everything is continuosly moving?(3 votes)
- Which is the most used type of energy in the world(2 votes)
- In U.S. homes, natural gas is the most widely used energy source (49%), followed by the secondary energy source, electricity, at 39%.(1 vote)
- How is energy able to move so fast at1:53(1 vote)
- At1:08what is potential energy?(1 vote)