PHYS 101 Unit 1
If a gram of antimatter meets a kilogram of matter, the amount of mass to survive is
999 grams
The synthesis of a large collection of information that contains well-tested and verified hypotheses about certain aspects of the world is known as a scientific
Theory
What is the molecular mass of a water molecule?
18 amu
An atomic mass unit (amu) is 1/12 the mass of
a carbon atom
Using science to analyze nature
adds depth to our understanding and therefore adds to our appreciation of nature.
If a pair of helium nuclei are fused together, the result is
beryllium
There are about as many atoms of air in our lungs at any moment as there are breaths of air in the atmosphere of
the whole world.
How many different elements are in a water molecule? (H2O)
two
The chemical properties of matter come mostly from its
electrons.
The scientific method is a method for
gaining new knowledge
If one neutron is added to a helium nucleus, the result is
helium
In science, a educated guess is a
hypothesis
Which subatomic particles are electrically neutral?
neutrons
Solid matter is mostly empty space. The reason solids don't fall through one another is because
of electrical forces
Brownian motion has to do with the
random motions of atoms and molecules
The statement, "There are regions beneath Earth's crust that will always be beyond the reach of scientific investigation," is a
speculation
If we doubled the magnifying power of the most powerful optical microscope in the world, we would
still not be able to see or photograph an atom.
A factor that usually determines whether a substance is in the solid, liquid, gaseous, or plasma state is its
temperature.
If experimental findings are not reproducible,
the results are not considered valid