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Motion Commotion
Energy and Work (work work work work)
Go With the Flow
Wave After Wave
Getting Warmer
100
Every object continues in its state of rest, or of uniform velocity in a straight line, as long as no net force acts on it
What is Newton’s first law of motion/What is the law of inertia
100
Define work
What is the product of the magnitude of the displacement times the component of the force parallel to the displacement; unit is Nxm or Joules
100
Phase(s) of matter referred to as fluid(s)
What are liquids and gases.
100
The distance from any point in the wave to the next equivalent point, trough to trough or crest to crest
What is the wavelength of a wave
100
A measure of the internal energy of a substance, wherein energy is the capacity to do work
What is heat
200
The formula that represents the force of friction
What is Ffr = μkFN (Force of friction = coefficient of kinetic friction times the normal force)
200
The energy of an object in motion and the formula
What is kinetic energy; KE=½ mv2
200
The phase of matter that occurs only at very high temperatures and consists of ionized atoms
What is the plasma phase
200
Sound is this type of wave
What is a longitudinal wave
200
A measure of the average kinetic energy of the molecules of a substance
What is temperature
300
Define G (universal constant) with units
What is 6.67 x 10-11 Nm2/kg2
300
The energy of an object associated with forces that depend on the position of the object and formula
What is potential energy; gravitational potential energy is PEgrav=mgy
300
The ratio of the density of a substance to the density of water at 4 degrees Celsius
What is specific gravity
300
The speed of sound in dry air at room temperature
What is 343 m/s
300
The correct method for converting degrees Celsius to Kelvin
What is add 273
400
Newton’s 3rd law of motion
What is whenever one object exerts a force on a second object, the second exerts and equal force in the opposite direction on the first
400
The Moon revolves around the Earth in a nearly circular orbit, kept there by the gravitational force exerted by the Earth. Does gravity do (a) positive work, (b) negative work, or (c) no work on the Moon?
The gravitational force exerted by the Earth on the Moon acts toward the Earth and provides its centripetal acceleration, inward along the radius of the Moon’s orbit. The Moon’s displacement at any moment is tangent to the circle, in the direction of the velocity, perpendicular to the radius and perpendicular to the force of gravity. Hence the angle theta between the force FG and the instantaneous displacement of the Moon is 90 degrees, and the work done by the Earth’s gravity on the Moon as it orbits is therefore zero.
400
The formula to find the absolute pressure
What is PABS = PATM + PGAUGE (Atmospheric pressure plus gauge pressure)
400
Standing waves do not appear to go anywhere, but oscillate up and down (remember the hallway demonstration with the slinky). These are the points of the wave that experience maximal displacement.
What are antinodes
400
Energy can be changed from one form to another, but it cannot be created or destroyed. The change in internal energy, U, is equal to the difference of the heat transfer into the system, Q, and the work done by the system, W
What is the first law of thermodynamics
500
German astronomer who discovered 3 laws of planetary motion
Who is Johannes Kepler
500
Two water slides at a pool are shaped differently, but have the same length and start at the same height h. (see picture) Two riders, Paul and Kathleen, start from rest at the same time on different slides. Which rider makes it to the bottom first?
Who is Kathleen. She is consistently at a lower elevation than Paul at any instant, until the end. This means she has converted her potential energy to kinetic energy earlier. Consequently, she is traveling faster than Paul for the whole trip except toward the end where Paul finally gets up to the same speed. Since she was going faster for the whole trip, and the distance is the same, Kathleen gets to the bottom first.
500
Define the Archimedes’ principle
What is the buoyant force on an object immersed in a fluid is equal to the weight of the fluid displaced by that object
500
Pitch relates to frequency in a certain way.
What is directly related
500
Energy naturally transfers from hotter objects to cooler ones
What is the second law of thermodynamics