Test 6 Flashcards
What principle states that the buoyant force experienced by an object is exactly equal to the weight of the fluid displaced?
Archimedes principle
What is the most important component of a heat pump?
refrigerant
Who first demonstrated the existence of invisible electromagnetic waves?
Heinrich Hertz
What is the heat required to change a given mass of a solid into a liquid?
heat of fusion
What is the amount of heat needed to change an object’s temperature by a given amount?
heat capacity
What law relates an object’s force, mass, and acceleration?
second law of motion
What is the process in which colors are produced by interference of reflected light?
iridescence
What fundamental force is responsible for elastic potential energy?
electromagnetic
What is the process of dissipating the energy of sound waves in matter?
absorption
Which law states that if the temperature of a gas remains constant, the volume and pressure are inversely proportional?
Boyle’s law
Which type of wave makes communication possible between ships, airplanes, and cellphones?
radio waves
What type of heat transfer occurs when a fan blows air in a room?
convection
What is the apparent slowdown in time for an object traveling at nearly the speed of light?
time dilation
When a whetstone is used to sharpen a knife, the stone performs work on the knife to remove excess metal. Water or mineral oil must be applied to the stone; otherwise, the blade will become too hot and warp. What scientific principle explains why the blade gets hot?
first law of thermodynamics
What happens to atmospheric pressure as altitude increases?
decreases
What is the term for a beam of light containing waves that are aligned in the same direction?
polarized
What is the Si base unit for mass?
kilogram
What is the product of an object’s mass and velocity?
momentum
What form of energy is associated with the position of an object and the forces acting upon it?
potential
What are the additive primary colors?
red, green, blue
What is the ability for other scientists to reach the same conclusion by performing the same experiment under different conditions and by performing other experiments to test the same hypothesis?
reproducibility
What are all nonzero digits, all zeros between nonzero digits, and zeros at the end of a number with a decimal point?
significant digits
What is the formula for the frequency of a wave?
frequency= waves/time
What is the phenomenon in which a liquid in thin tubes rises above or falls beneath its own level?
capillarity
What is considered a mixture of all the colors of light?
white