Mechanics
An object in motion remains in motion unless acted upon by an external ________.
Force
What type of galaxy is the Milky Way?
Spiral
Opposite charges ________ and like charges ________.
attract, repel
There are more ____ in the universe than grains of sand on earth.
Stars
At what temperature does water freeze at?
0°C
Which physical quantity describes the rate of change of velocity?
Acceleration
How many planets are in our solar system have rings?
4
The magnitude of the charge of an electron is ________ C.
1.6×10^-19
Astronauts float in orbit because they are in continuous ______ .
Free Fall
This gas makes up most of Earth's atmosphere.
Nitrogen
Momentum = Mass x "###"
What is "###?
Velocity
if martian: Mars
x: Jupiter
what is x?
Jovian
The electric field lines around a positive charge point _____.
Outward
A phenomenon where light from distant galaxies shifts towards longer wavelengths (indicating they are moving away from us).
Redshift
Bananas are Radioactive because of this element.
Potassium
The force that constrains motion along a surface without doing work is called what?
Normal Force
This object bends light so strongly it can act like a cosmic magnifying glass.
A Black Hole
What physical quantity equals the negative derivative of electric potential with respect to distance?
Electric Field
This process allows stars to produce energy by converting mass into energy in their cores.
Nuclear Fusion
This molecule stores and transfers energy inside living cell.
ATP
Which property of mass determines how difficult it is to change an object’s state of motion?
Inertia
What day do we have nearly the same amount of daylight and darkness
Equinox
∇ · 𝐁⃗ = X
value of X?
0
This invisible form of matter is inferred from galaxy rotation curves and gravitational lensing.
Dark Matter
The reactant that limits the amount of product formed is called the ________.
limiting-reagent