SOurces of energy Flashcards
Name the types of energy
thermal, chemical, electrical, light, pressure, nuclear
What is energy?
an ingredient of the universe
What are the three ingredients of the universe?
Matter, energy and intelligence
What is the law of conservation of energy?
Energy can neither be created nor destroyed; rather, it can only be transformed from one form to another.
When is energy needed?
to accomplish any task
What is visible matter?
Constitutes all the mass (stars) that are directly visible including all planet sized objects and even smaller. Visible means objects that emit light. Mass considered are the elements of the periodic table.
What is dark matter?
Constitutes mass that is not described by the periodic table
Where is energy found?
Electromagnetic radiation(light and heat), Cosmic Microwave Background, kinetic energy, gravity, dark energy
What is electromagentic radiation?
Waves of massless energy that penetrate every pat of outer space.
What is Cosmic Microwave Background(CMB)?
Energy left over from the big bang that keeps space warm
Who discovered CMB?
American radio astronomers Arno Penzias and Robert Wilson after starting their work in 1940s and ending in 1964. It earned them the 1978 Nobel Prize in Physics.
How did Penzias and Wilson discover CMB
In 1964, Arno Penzias and Robert Woodrow Wilson at the Crawford Hill location of Bell Telephone Laboratories in nearby Holmdel Township, New Jersey had built a Dicke radiometer that they intended to use for radio astronomy and satellite communication experiments. On 20 May 1964 they made their first measurement clearly showing the presence of the microwave background with their instrument having an excess 4.2K antenna temperature which they could not account for. After receiving a telephone call from Crawford Hill, Dicke said “Boys, we’ve been scooped.” A meeting between the Princeton and Crawford Hill groups determined that the antenna temperature was indeed due to the microwave background. Penzias and Wilson received the 1978 Nobel Prize in Physics for their discovery.
Where is kinetic energy found in the universe?
In the motion of all the galaxies as they rotate and rush away from each each other in our expaning universe.
What is gravity?
A natural phenomenon by which all things with mass are brought toward (or gravitate toward) one another, including planets, stars and galaxies, and other physical objects.
How is gravity a form of energy?
The attraction between objects like stars and planets takes energy