Exploring Physics Chapters 5-7 Flashcards
Heat is a type of
energy
A rubber band is elastic because it will
snap back to it’s original shape
The rate of diffusion of a gas is inversely proportional to the ______ of its molecular weight.
square root
The volume of a gas is inversely proportional to the pressure.
Boyle’s law
Heat moving from one end of a metal fireplace poker to the other end is an example of heat transfer by
conduction
Energy is a term that has been in use
since the 1800s
If you are pushing against a desk, what must happen in order for work to occur?
the desk must move
Work transfers _______________ from one place to another.
energy
A steam engine works because ___ flows from a hot region to a cold region.
heat
The three factors that determine the heat contained in an object are type of substance, mass, and
temperature
Almost every time that energy changes form, the amount of what kind of energy increases?
heat
A sea breeze is set in motion because of
convection
The pressure of a liquid acts ___ in all directions.
equally
Heat is transferred from the sun to earth by .
radiation.
Pressure times volume of any gas divided by the temperature is a constant.
Ideal gas law
What does this demonstration measure?
You can measure heat capacity by heating identical masses of different substances and then placing them on a block of ice. Observe the different distances they melt into the ice.
The scientist who discovered that pure water has a fixed boiling and freezing temperature was
Daniel Fahrenheit
James Prescott Joule found how mechanical energy due to motion compares to ___ energy.
heat
The lifting force acting on a solid object immersed in water is equal to the weight of the water shoved aside by the object.
Archimedes’ principle of buoyancy
Doubling velocity of a moving object makes its kinetic energy
four times as great
Heat is the motion of ___
atoms and molecules
Density is equal to mass divided by
volume
How can scientist measure temperatures higher than 1,700o?
They can measure higher temperatures with electrical conductivity and color of light emitted by glowing substance.
Moving heat energy in a direction opposite to its normal flow requires
work.
Foot-pounds (English system) and joules (metric system) both measure
work
The equation E = f x d is used to find
work
The two most common substances used in thermometers are colored alcohol and
mercury
Is steel highly elastic?
yes
Energy can be changed from
one form to another.
The English and metric system units for measuring power are
horsepower and watt
The velocity of a fluid and its pressure are inversely related.
Bernoulli’s principle
Doubling mass of a moving object ___ its kinetic energy.
doubles
