cats
The range of human hearing
What is 20 to 20,000 Hz?
Most humans cannot hear these two types of sound waves.
What are infrasonic and ultrasonic waves?
Sound travels in these types of media
What are solids, liquids, and gases?
Temperature affects the speed of sound. The speed of sound is slightly greater on a (cold/hot) day.
What is a hot day?
The loudness of sound is related to its ___.
What is amplitude?
This occurs when objects vibrate at matching frequencies.
What is resonance?
The pitch of a sound is related to its ___.
What is frequency?
Heat that is carried by a moving material
What is convection?
Heat that is transferred by objects in direct contact with each other
What is conduction?
Heat transfer that does not require a medium to travel through
What is radiation?
Tiny bundles or packets of light
What are photons?
Light acts as both of these
What is a wave and a particle?
The primary colors of LIGHT
What are red, blue, and green?
The 7 regions of the electromagnetic spectrum
What are Radio waves, Microwaves, Infrared light, Visible light, Ultraviolet light, X-rays, Gamma rays?
The first law of reflection: "___ is equal to the angle of reflection."
What is the angle of incidence?
This type of mirror can produce an image that is real, reduced, and inverted.
What is a concave mirror?
This medium has the lowest optical density
What is a vacuum?
Bending light rays at the boundary between two media of differing optical density
What is refraction?
A LENS with a focal point.
What is a converging lens?
A material which readily transmits a current
What is a conductor?
The production of a charge by the influence of a charged body at a distance
What is induction?
Physics is the study of these two things
What is matter and energy?
Attraction between two like molecules
What is cohesion?
The value of gravity in m/s2
What is 9.8 m/s2 ?
The pathway of any projectile
What is trajectory?
The product of force and distance
What is work?
This law states that the amount of heat lost is equal to the amount of heat gained.
What is the Law of Heat Exchange?
This temperature scale uses zero as the lowest theoretically attainable temperature.
What is the Kelvin temperature scale?
This color of light is most readily scattered by our atmosphere.
What is blue light?
The only available charge carriers in a solid material.
What are electrons?
A resistor in which the energy of current is expended as heat, light, or work
What is a load?
A rock that is a naturally occurring magnet
What is a lodestone?
Magnetization can occur by either of these two ways.
What is contact or induction?
The heat generated by a current when it passes through a resistance.
What is joule heat?
For semiconductors, an increase in temperature causes a ___ in resistivity.
What is a decrease in resistivity?
The voltage of house current is said to give this type of value.
What is an effective value?
Doing this to the temperature of a magnet destroys its ability to retain its magnetization.
What is increasing the temperature?
This device measures resistance.
What is an ohmmeter?
This is where magnetic force is most concentrated.
What are poles of a magnet?
Lines of ___ always originate in a positively charged body and terminate in a negatively charged body.
What are lines of force?