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C4 H12 O6
Flatten due to the forces.
Fall at a constant speed.
Continue to speed up.
Slow to a stop.
Reduce the mass of the box
Increase the mass of the box
Make the surfaces of the box smooth
Make the surface of the floor smooth
An upward force equal to the weight of the wood.
A downward force equal to the weight of the wood.
An upward force equal to the weight of the displacement water.
A downward force equal to the weight of the displacement water.
40 m north
40 m / s
40 m / s north
Protons and electrons grouped together in a random pattern
Protons and electrons grouped in an alternating pattern
A core of protons and neutrons surrounded by electrons
A core of electrons and neutrons surrounded by protons
2m3 of bricks
4m3 of bricks
6000m3 of air
10,000m3 of air
They are noble (inert) gases.
They are nonmetals.
They have the same thermal conductivity.
They have the same number of protons.
Noble (inert) gases
512 g / mL
32 g / mL
8 g / mL
4 g / mL
Hundreds of stars.
Thousands of stars.
Millions of stars.
Billions of stars.
Moons, planets, and comets
Moons, comets, and stars
Planets, stars, and comets
Planets, stars, an moons
Lower melting points and greater conductivity than nonmetals.
Lower conductivity and lower density than nonmetals.
Higher density and lower melting points than nonmetals.
Greater conductivity and higher melting points than nonmetals.
Carbon forms crystal structures under certain conditions.
Carbon can exist as a solid, liquid, or gas.
Carbon bonds in many ways with itself to form chains.
Carbon exists in radioactive forms.
New molecules are formed.
The mass of the sample is increased.
The arrangement of the molecules changes.
Energy is absorbed by the molecules.
I and O
Ir and O
Fe and O
Pb and O