Exploring Physics Chapters 5-6 Flashcards
Energy can be changed from
one form to another.
Moving heat energy in a direction opposite to its normal flow requires
work.
Heat is a type of
energy
Heat moving from one end of a metal fireplace poker to the other end is an example of heat transfer by
conduction
James Prescott Joule found how mechanical energy due to motion compares to ___ energy.
heat
Heat is the motion of ___
atoms and molecules
Doubling velocity of a moving object makes its kinetic energy
four times as great
A steam engine works because ___ flows from a hot region to a cold region.
heat
Almost every time that energy changes form, the amount of what kind of energy increases?
heat
The three factors that determine the heat contained in an object are type of substance, mass, and
temperature
The scientist who discovered that pure water has a fixed boiling and freezing temperature was
Daniel Fahrenheit
Work transfers _______________ from one place to another.
energy
The English and metric system units for measuring power are
horsepower and watt
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.
The equation E = f x d is used to find
work
The two most common substances used in thermometers are colored alcohol and
mercury
If you are pushing against a desk, what must happen in order for work to occur?
the desk must move
Foot-pounds (English system) and joules (metric system) both measure
work
A sea breeze is set in motion because of
convection
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.
Energy is a term that has been in use
since the 1800s
Heat is transferred from the sun to earth by .
radiation.
Doubling mass of a moving object ___ its kinetic energy.
doubles
