Basics
What is Physics?
The study of the physical world.
What is viscosity?
It is the measure of a fluid’s resistance to flow…the measure of how thick or thin a liquid is.
Who was Einstein?
German physicist/scientist.
Name all 6 simple machines
Screw, lever, wheel and axle, inclined plane, wedge, pulley.
How is "energy" defined?
Energy is a measure of an object’s capacity to perform work.
What the 3 measures of "central tendency?"
Mean, median, mode.
Name 3 things that affect viscosity
Temperature, molecule size, & pressure.
What did Einstein do when he needed a "brainwave?"
Played music or practiced violin.
Your teeth are an example of which simple machine?
Wedge.
Explain "kinetic" vs. "potential" energy:
Potential: stored energy.
Kinetic: the energy of motion.
Explain the difference between Mean, Median, & Mode.
Mean: average.
Median: the middle number in a set.
Mode: the number that occurs most frequently.
What was the name of the substance we made out of cornstarch and water?
Oobleck
What were 3 of Einsteins most important contributions to science?
Special relativity, general relativity, E=MC2, photoelectric effect, & Brownian Motion.
Give an example of each of the 3 classes of levers:
Class 1: See-saw (effort, fulcrum, load)
Class 2: Wheelbarrow (effort, load, fulcrum)
Class 3: Hammer (fulcrum, effort, load)
What is a "force"?
A force is something that can cause an object to change its direction, speed, or shape. It is known as a “vector quantity.” This means it has both direction AND magnitude (size or strength).
At what degree Celsius does water boil?
100oC
What is the difference between Newtonian and Non-Newtonian fluids?
Newtonian: viscosity only changes with temperature.
Non-Newtonian: viscosity change with a variety of factors.
Explain Special Relativity or explain the examples we looked at in class.
The faster you move through space, the slower you move through time. Throwing a ball on a train...Einsteins trip on the train looking at the clocktower, imaging he was traveling at the speed of light.
We use simple machines to gain a ____________
Mechanical advantage.
How is "work" measured? (or Energy, or Power?)
In Joules. (Kilocalories, or Watts)
Explain how matter changes between it's 3(4) states.
Solid ------> melting/freezing ----->Liquid
Liquid----> vaporizing/condensating---->Gas
Gas---->Ionizing/deionizing----Plasma
Put these in lowest to highest viscosity order: molasses, oil, pitch, water, blood, honey
water, blood, oil, honey, molasses, pitch
Explain what E=MC2 means or examples from class.
Basically, energy and mass are interchangeable. Nuclear fission, nuclear fusion, and radioactive decay.
How does a Wheel & Axle give you a mechanical advantage?
Depending on where you apply the force, it takes less effort to move either the wheel or the axle. Ex: ferris wheel, doorknob, car.
How is "work" defined?
Work is the transfer of energy from one object to another through a force applied over a distance.