1136 Questions & Blanks Flashcards
Robert Boyle wrote the book __________
The Skeptical Chemist
The smallest subdivision of a compound that can exist separately and still retain the chemical properties of that compound is called a ______
molecule
At the boiling temperature of a substance, ________________
liquid changes to gas
At the freezing temperature of a substance, _______________
liquid changes to a solid
In the process of sublimation, ____________
solid changes to gas
In the process of condensation
gas changes to liquid
In the process of evaporation
liquid changes to gas
Kinetic energy would be best conserved by a collision between two spherical objects of __________________
steel and glass
1 lead - copper - brass - elm
2 cork - iron - rubber
3 ivory - steel - glass
coefficients of collision
The four most common types of stress
stretching
bending
compressing
twisting
The ability to be pulled into a fine wire is called
ductility
The ability to be hammered or rolled into thin sheets is called
malleability
The density of many substances is often compared to ____________, which has a density of 1 gm/cm^3
water
The ration of the density of a substance to the density of water is called its ___________
specific gravity
change in length over length to calculate the strain
.
Why are most substances less dense as liquids than as solids?
because there are greater spaces in between the molecules
Meteorologists use a ______ to express air pressure
millibar
Pressure of a liquid depends only on _____ and ______
height
density
The two conditions the determine the density of a gas?
pressure
temperature
Standard temperature and pressure
0 degrees Celsius
760 mm Hg
The absolute temperature scale is the
Kelvin scale
Gay-Lussac’s law
the absolute temperature of a fixed mass of gas is directly proportional to the pressure, provided the volume is kept constant.
inventor of the barometer
Evangelista Torricelli
Three most abundant gases in air
oxygen nitrogen argon
Blaise Pascal proved that _______ and _______ are inversely related
air pressure
altitude
What happens when friction balances the force of gravity on a falling object?
acceleration reduces to zero and the body falls at constant terminal velocity
laminar flow and turbulent flow in liquids
smoothly around a body
many disturbances called vortices
How is an airplane able to fly?
air passing over the wing travels farther and the pressure over the wing is reduced, producing lift and enabling the plane to fly
pressure = g(m/s^2) x (cm or m) x (grams/cm^3 or kg/m^3)
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