Ch 8 Vocab
The unit to measure power
What is watts?
Jim uses 100 N of force to push a box 2 meters in 5 seconds. What power is exerted?
40 watts
Energy used to power a light bulb.
What is electrical energy?
The energy used to drive the water cycle come from.
What is the sun?
What is the efficiency definition? ( NOT THE EQUATION)
How well or effective energy (power) is converted from one form to another.
What is the force of gravity on Earth (include the units)?
9.8 m/s ^2
The unit to measure work
What is Joules?
The rate at which work is done.
What is power?
Energy used to lift a book off the desk.
What is mechanical energy?
FREE POINTS AGAIN!
True or false: For Ch 8 test Mrs. Luna will not provide the equations (because it is in open note test).
TRUE
When friction increases in a machine, then the efficiency will _________.
decrease
Units used to measure potential energy and kinetic energy
Joules
The power to do 1000 J of work in 4 seconds.
What is 250 J of work?
FREE POINTS!
A flashlight works because it converts ______ energy to _____ energy.
What is chemical energy to electrical energy?
Mrs. Luna is trying to turn up the volume on the TV as she watches a hockey game. What animal is laying on her lap?
Tito
FREE POINTS AGAIN!
Power relevant to 746 watts.
What is horsepower?
Work done of a 10 kg ball as it falls from a height of 200 cm.
What is 196 J?
What type of energy is collected when atoms are split?
Nuclear energy
A diagram that shows how energy reduces or increases as it changes form.
What is a Energy flow diagram?
Mrs. Luna's favorite hockey team.
Who are the Anaheim ducks?
What equation can be used to find the missing side of a triangle?
Pythagorean Theorem
Force that causes machines to be less efficient.
What is friction?
Calculate the time it takes if you do 500 J of work and use 200 Watts of power.
2.5 seconds
What is a form of chemical energy found in the body used to complete everyday tasks?
ATP
According to this law, energy cannot be created or destroyed, only transformed.
What is the Law of Conservation of Energy?
Calculate potential energy of a 2 kg ball that sits on top of a ramp that is 3 meters tall.
58.8 J
What number does G represent?
6.67 x 10 ^ -11
Some one who studies weather.
Meteorologist
calculate Kinetic energy of a 2 kg ball if it rolls at a velocity of 2 m/s.
4 J
Thermal/heat energy, sound, x-rays, and light are categorized as radiant energy because they travel as ______.
WAVES
True or false: The food chain, the human body, and the water cycle are all examples of systems that have energy in the natural environment.
TRUE
Mrs. Lunas favorite breakfast food.
What are Blue berry Pancakes?
What equation is known as Hook's Law?
F=-kx
Terms used to describe the energy of an object on the top of a hill and as it rolls down the hill.
What is potential energy and what is kinetic energy?
Jose weighs 500 N and Bella weighs 400 N. They both go up the 4 meters of stairs, but Jose reaches the top in 6 seconds and Bella reaches the top in 5 seconds. Who exerts the most power?
Jose
Sitting next to a campfire there are 2 types of energy you might experience.
What is thermal/radiant energy, and chemical energy?
A term used to describe energy being "lost" or transferred inadvertently in the form of heat.
Entropy
What is Mrs. Luna's Starbucks order?
Vanilla sweet cream cold brew
OR Black coffee
A 100 kg ball is dropped from the top of the building. The ball has _________ amount of force.
F=MA
980 N