Physics Study Guide

Science 392 clues | 68 recurring answers
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68
answers to learn
1 Must-Know
9 Should-Know
58 Worth Knowing

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These appear 8+ times. Memorize these first.

gravity 9

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Jump to: Chemistry / Elements | Astronomy / Space | Math / Physics | Biology / Animals | Other

Chemistry / Elements

45 answers | 122 clues
Must-Know (1)
gravity 9x 11.1% stumper $922 avg J:1 DJ:8
J $100 1990 1 of the 4 basic forces in nature is this one that keeps you earthbound
DJ $800 2005 Pure water's density is approximately 1 gram per cubic centimeter, & its "specific" this is also 1
DJ $5,000 DD 2022 The standard model of particle physics accounts for 3 of the 4 fundamental forces, skipping this one, important in daily life
Should-Know (3)
light 6x $283 avg J:3 DJ:3
J $100 1991 Neutrinos travel at the speed of this & most pass right through the earth
J $200 2011 Back around 100 A.D. Ptolemy studied the refraction of this through several media
DJ $200 1997 The theoretical tachyons are said to exist only at speeds faster than the speed of this
torque 4x 25.0% stumper $950 avg J:2 DJ:2
J $200 1988 From Latin for "twist", the term for a turning or twisting force
J $1,000 2019 The axe kick swings in a downward arc, adding gravity to the blow & helping to increase this rotational force
DJ $1,000 1985 Term for the amount of twist that a force exerts on an object
inertia 4x 25.0% stumper $800 avg J:1 DJ:3
J $600 2019 Side kicks & other powerful blows are practiced on a heavy bag, taking advantage of its abundance of this physical property, the tendency of an object to remain at rest
DJ $1,000 1995 Term for the tendency of a body to remain at rest until acted upon by an outside force
DJ $800 2018 I:The tendency to stay in the same place or on the same path until acted on by an outside force
Worth Knowing (41)
the speed of light 3 quarks 3 hydrogen 3 friction 3 equilibrium 3 diffraction 3 a proton 3 a pole 3 water 3 Poles 3 optics 3 mechanics 3 fission 3 Brownian motion 3 a photon 3 a linear accelerator 3 a breeder reactor 3 uranium 2 spin 2 refraction 2 radioactivity 2 neutrons 2 longitudinal 2 half-life 2 gamma rays 2 electron volt 2 a superfluid 2 a pulley 2 X-rays 2 the University of Chicago 2 ultra-high frequency 2 a quark 2 potential 2 Oppenheimer 2 one half 2 a neutron 2 an inclined plane 2 centrifugal force 2 Enrico Fermi 2 a chain reaction 2 alpha, beta and gamma 2

Astronomy / Space

10 answers | 29 clues
Should-Know (3)
angular momentum 5x 40.0% stumper $1,680 avg J:1 DJ:4
J $800 2019 A continuous series of spinning kicks moving in the same direction exploits this type of rotational momentum
DJ $2,000 2012 Get up in the "A.M." & learn that an orbiting body's this is the product of mass, velocity & distance from an axis
DJ $1,000 1999 Collisions demonstrate the law of conservation of this, the product of mass & velocity
plasma 4x 25.0% stumper $1,575 avg DJ:4
DJ $800 2022 Most of the visible matter in the universe exists in this ionized state, neither solid, liquid nor gas
DJ $1,000 1994 This "fourth state of matter" occurs in thermonuclear reactions in the sun
DJ $1,500 DD 1996 Sometimes called a fourth state of matter, this is a gaseous mixture of free electrons & positive ions
electric current 4x 50.0% stumper $550 avg J:1 DJ:3
J $400 1988 An ammeter is used to measure this
DJ $1,200 2023 Gustav Kirchhoff showed that this travels at light speed, so a circuit connecting a motor to a switch will start the motor fast
DJ $400 1988 In the U.K., it's alternating, about 240 volts at a frequency of 50 hertz
Worth Knowing (7)
Einstein 3 the uranium atom 3 mercury 2 antimatter 2 a black hole 2 an orbit 2 nuclear fusion 2

Math / Physics

4 answers | 12 clues
Should-Know (2)
thermodynamics 4x $2,250 avg J:1 DJ:3
DJ $800 2021 In 1850 Clausius laid down the second law of this, that heat won't of itself pass from one body to a hotter one
DJ $6,600 DD 2020 From the Greek for "heat" & "power", it's the branch of physics dealing with the flow of heat & energy
DJ $800 2012 In 1906 Walther Nernst announced his heat theorem, now known as the third law of this
entropy 4x 25.0% stumper $1,350 avg DJ:4
DJ $800 1998 In the 19th C. Rudolf Clausius coined this word for measuring increasing disorder in a system
DJ $1,000 1986 The physical measure of disorder, it's what sets in to cause everything to break down eventually
DJ $1,600 2012 In 1865 physicist Rudolf Clausius coined this term for the measure of disorder or randomness in a system
Worth Knowing (2)
work 2 Hertz 2

Biology / Animals

4 answers | 11 clues
Should-Know (1)
relativity 4x $625 avg J:1 DJ:3
DJ $200 1996 Einstein's "Special" theory of this, put forth in 1905, refers only to inertial frames of reference
DJ $1,600 2008 The special theory of this says that the speed of light in a vacuum is a universal constant
J $300 1988 In 1905, a special theory of this was published, & in 1916, the general theory
Worth Knowing (3)
(Max) Planck 3 elasticity 2 Potential energy 2

Other

5 answers | 10 clues
Worth Knowing (5)
horsepower 2 Archimedes 2 a vacuum 2 the focal length 2 a cloud chamber 2
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