Magnetism
What´s a Magnetic field?
the area around a magnet that can attract or repel metals
A wave that is the fastest and move through solid rock are called?
P waves
what is entropy?
a measure of the disorder of a system
There are two types of collisions Inelastic & Elastic true or false
Mechanical waves don't require a medium to travel true or false
false
What are most magnets made of?
Iron, Nickel, Cobalt
What type of wave only travels through the earth´s crust?
Surface waves
if entropy increases because the pressure increases if the density......?
decreases
What is momentum?
Mass in motion
What are the 2 main types of waves?
Mechanical, electromagnetic waves
Whats a magnet?
what is the 3rd type of waves called?
Surface waves
what does the first law of thermodynamics state?
the energy of the universe is constant, energy cannot be created or destroyed
If two car crashes and they stick together what type of collision is it?
elastic collision
What is amplitude
the distance from the equilibrium to crest or troughs
How is a Magnetic field drawn?
start at the North pole and connect to the south pole
What causes a seismic wave?
Earthquakes, large landslides or explosions
Whats specific heat?
energy required to change the temperature of a substance
What is the equation for conservation of momentum
m1v1+m2v2=(m1+m2)vf
Period and frequency are inversely related, true or false
true
how is a magnet thats powered by electricity called?
electromagnet
What type of waves are felt seconds later?
Secondary waves
The entropy of the universe is always decreasing , true or false
What does the Law of conservation of momentum state?
The total momentum of a system is conserved meaning that no matter the type of collision the total change in momentum will be zero
Whats a periodic wave?
a wave that repeats in regular intervals