Ch.9
What is the Universal law of gravitation?
It is directly proportional to the product of the masses between which it acts
What composite particles are in the nucleus of an atom (nucleons)?
Protons and Neutrons
What determines whether an object floats – density or weight?
Density
What is temperature?
Temperature is the measure of hotness or coldness expressed in terms of any of several scales, including Fahrenheit and Celsius
What is G in the equation ?
G is the gravitational constant
Which of the particles in the nucleus determines the particular element?
The proton
What determines buoyant force?
the weight of the fluid displaced by the object
What is weightlessness?
The condition experienced in free fall, the feeling of gravity is cancelled by the inertia
Which nucleons determine the atomic mass or weight of an atom?
the # of protons and neutrons
What is the apparent weight of an object in a liquid?
the perceived weight of the object when submerged
What was the “Big Bang”?
The theory of how the universe began
The atomic hypothesis states..
all things are made of atoms
What is the Principle of Floatation?
when an object floats on a liquid the buoyant force that acts on the object is equal to the weight of the object
Additional knowledge:
-The ocean tides are produced by the difference in the moon’s gravitational pull on opposite sides of the earth
- The gravitational force between two objects increases as they get closer together
Quarks are fundamental particles…
protons & neutrons are made of quarks
Pressure is the force per unit area …
that one object exerts on another