Waves
True or false: trough is the lowest point of a wave
True
What is a force?
push or pull
In the law of conversation of energy states that energy can be created or destroyed: true or false.
False, it cannot be created nor destroyed.
The faster the molecules the more ___________ ________ it has
kinetic energy
what is a proton?
a positive charged
the crest of the wave is the _____
highest point of the wave
Is speed and velocity the same?
NO
kinetic energy is _____________
the energy in motion
True or false: The molecules on a solid moves faster than a liquid
False
All matter are made of __________
atoms
what is a wave?
A disturbance which propagates through a medium.
True or false: An acceleration is the rate at which velocity changes
TRUE
How do you calculate kinetic energy?
K.E = (Mass x velocity^2) ÷ 2
what is a thermal energy?
it's the total kinetic energy of the molecules.
True or False: A south and a North magnetic poles repel each other
False
what is the wave that can't travel through a vacuum.
A Mechanical wave
Newton's first law states that ____________
An object at rest stays at rest and an object at motion stays in motion unless acted by an unbalanced force.
is kinetic the same as potential energy?
NO
what are first three different states of matter?
solid, liquid, and gases.
what happens if the electrons spin in the same direction?
it creates an invisible force known as a magnetism.
True or false: electromagnetic can't waves travel through space?
False, it can.
How do you calculate acceleration?
(final speed - Initial speed) ÷ time
If a 5kg ball is 100m above the ground. How many energy does it have? hint: GPE=MGH
500J
what is a exothermic
a chemical reaction that releases energy
what is an electromagnetism?
the physical interaction among electric charges, magnetic moments, and electromagnetic fields.