Physics 1
For a given object on a given surface, this is the greater coefficient of friction, out of static or kinetic.
What is static friction?
The Doppler effect explains why an observer in front of an approaching, moving sound source, perceives a ______(higher/lower) frequency of sound than a person standing behind the moving sound source.
What is higher frequency?
What is a measure of molecular activity of a substance.
What is temperature?
According to the quantum theory of light, the energy of light is carried in discrete units called these.
What are photons?
This is the amount of time it would take for a ball to reach the batter if the pitcher throws a fastball at 21 m/s and the batter is 18 m from the pitcher.
What is 0.86 second?
This describes a quantity that has both direction and magnitude.
What is a vector quantity?
This is the term for "cycles per time", as in the formula v = c/lambda.
What is frequency?
Temperature is measure in ____ and heat is measure in ____.
What are degrees and Joules?
Compared to the wavelengths of visible light the wavelengths of UV light are A. Shorter B. Longer C. The Same
What is A. Shorter?
This English Physicist once stuck a blunt sewing needle deep into his eye to investigate the science of sight.
Who is Isaac Newton?
This is the direction that centripetal acceleration goes in, relative to its circular path of motion.
What is inwards, toward the center of the circle?
his is the SI unit for electrical resistance.
What is the ohm?
This is one of the three main types of heat transfer.
What is conduction, convection, or radiation?
This is the bending of light around a small object.
What is diffraction?
According to the equation E=hc/λ, where h = 6.626 × 10^-34 joule·s and c = 2.998 × 10^8 m/s, this is the energy of a photon of light that has a wavelength of 600 nm (600 x 10^-9 m).
What is 3.31 x 10^-19 J?
Applying this to an object would cause it to twist or rotate.
what is Torque?
This is the name of the law relating potential difference (V) to current (I) and resistance (R), or V = IR.
What is Ohm's Law?
Invented the thermometer
Who is Galileo?
When light enters a more dense medium it will bend towards or away from the normal line?
What is Towards.
Although more well known to introductory physics students for a law describing forces on springs, this physicist once got inside a person-sized vacuum chamber as a demonstration for the Royal Society of London.
Who is Robert Hooke?
This is described by the equation ___ = F*d*cos(theta).
What is work?
Simple harmonic motion equation
what is x ( t ) = A cos ( ω t + φ ) ?
Blow air onto your hand with your mouth wide open and then your lips puckered. When does the air look cooler and why? Assume the process is so fast that Q = 0
It is cooler when the lips are puckered. As air is blown out of the lips, it expands. The expanding breath of air does orderly, macroscopic work on its surroundings pushing molecules away, W < 0. As a result the internal energy decreases, ∆E_int = W + Q = W < 0. This causes the air to become cooler.
Scattering of light caused by atmospheric molecules which gives the sky a blue color.
What is Rayleigh scattering? Blue light scattered more than other wavelengths. Larger particles caused more scatter of other wavelengths.
What does LASER stand for
Light amplification by the stimulated emission of radiation