Work and Energy
What is effort?
According to Newton's Third Law, action and reaction forces are always this in magnitude, and this in direction.
What is equal and opposite.
This was the unexpected behavior of alpha particles during Rutherford's gold foil experiment.
What is bounce backward?
This is the strongest greenhouse gas in terms of raw ability to trap infrared light.
What is methane?
This is the mysterious thing that makes galaxies rotate faster than we think they should.
What is dark matter?
When you do positive work while some other force does an equal amount of negative work, you might gain this type of energy that can be used later.
What is potential energy?
Action and reaction forces don't do this, because the forces are applied to different objects.
What is cancel out?
This is what determines the overall charge of an atom.
What is the difference between the number of protons and electrons?
Despite being a greenhouse gas, humanity has repaired a hole in this, to maintain protection from the Sun's ultraviolet light.
What is the ozone layer?
Instead of contracting because of the force of gravity, we now know the universe is doing this, from observations of distant supernovae.
What is accelerating?
This is the force typically doing the most work when stopping a car.
What is friction?
A small force applied for a long time or a large force applied for a short time can give you the same amount of this quantity.
What is impulse?
Of the three subatomic particles in the atom, this one is just barely the heaviest.
What is the neutron?
This is what occurs over a short timeframe, compared with climate, which occurs over larger time periods.
What is weather?
This is what we call a closed path that one object takes around another.
What is an orbit?
If a car is traveling at 10 m/s and then accelerates to 20 m/s, this is by how many times the kinetic energy increases.
What is 4 times?
If two objects of the same mass collide elastically, this is what will happen to the object's initial velocities.
What is swap?
An atom with 24 protons and 26 neutrons is a different one of these when compared to an atom with 24 protons and 28 neutrons.
What is an isotope?
What are carbon sinks?
This is the value of the acceleration due to gravity at the center of the Earth.
What is 0 m/s2?
If a 1kg object is dropped from 2m and hits the ground only going 6 m/s, this is how much energy air resistance removed while the object was falling.
What is 1.59 Joules?
This is the speed that a 2kg object moving at 5 m/s colliding inelastically with a 3kg object at rest will have after they stick together.
What is 2 m/s?
An atom that has a half life of 10 minutes will end up with this much mass after 1 hour if you started with 1000g.
What is 15.625 grams?
The fact that this will happen in some regions of the Earth is part of the reason we call it climate change and not global warming.
What is get colder?
What are tides?