The Power Of Energy Flashcards
(53 cards)
What is energy
The capacity to do work or to produce change
What is energy expressed in
Joules
If an object weight 1 N how many grams does it way on earth
100 grams
What is formula to figure out how many joules of energy u need to do something
Joules = amount of Newton’s X how many meters high u wanna lift it
What is temperature
The degree if agitation in a substances’ molecule or atoms
What is thermal energy
The energy that comes from the random motion of particles in a substance
What are the factors affecting thermal energy
Higher the tempo of a substance, the faster the particles are moving, high er the thermal energy.
The more particles in a substance, the more collisions occurring, the more thermal energy
What is radiant energy
Kind of energy that is contained in and transported by electromagnetic waves
What are electro magnetic waves
Can transport energy from one place to another
The amount of energy is something depends on what?
On the wave length and the amount of radiation.
The shorter the wave length the more energy something has
What is the electro magnetic spectrum
Radio waves —> micro waves —> infrared —> visible light —> ultra violet —> X-rays —> gamma rays
How can u calculate the wave length
Distance from one crest to another or trough to trough
What is mechanical energy
Energy that results from the speed of an object, it’s mass and its surroundings
What is an example of mechanical energy increasing with speed
The damage caused in a car crash going 100 km and hour will be much greater than if the car was going 20 km and hour
What is an example of the more mass of an object, the greater the mechanical energy
A car crash with a truck does more damage than with a small car
What is an example of relationship with its surroundings
Object higher up has more energy than objects lower to the ground
what is chemical energy
energy stored in bonds of a molecule. to get energy out the bond has to be broken. the amount of energy depends on the strength of the bond and energy has to be triggered
what is an example of chemical energy
- operation of a car
- photosynthesis
- cellular respiration
what are examples of mechanical energy
- creation of a crater by an asteroid
- the spinning of a windmill wind
- powering of a hydroelectric power station by a waterfall
what does energy transformation mean
changing of energy from one form to another
what energy transformation does turning on a lamp go through
electrical —-> thermal/ radiant
what energy transformation does photosynthesis go trough
radian ——> chemical
what energy transformation does eating/ digesting go through
chemical ——-> mechanical
what does energy transfer mean
movement of energy from one place to another
