Flashcards
Mechanics definitions & formulas & astronomy info.
Cards in this deck (27)
- 1DISPLACEMENTvector quantity that refers to "how far out of place an object is"; it is the object's overall change in position. (m)
- 2VELOCITYvector quantity that refers to "the rate at which an object changes its position."
V=d/t (m/s) - 3ACCELERATIONAcceleration is a vector quantity that is defined as the rate at which an object changes its velocity.
Vf-Vi/t (m/s^2) - 4HOOKES LAW.the strain in a solid is proportional to the applied stress within the elastic limit of that solid.
F=-Kx - 5STRAINRelative change in shape/size of an object due to externally-applied forces
- 6STRESSinternal force (per unit area) associated with strain
- 7CONVECTIONthe movement in a gas or liquid caused by warm gas or liquid rising, and cold gas or liquid sinking (hot air rising,cooling and falling)
- 8CONDUCTIONTransfer of energy through a medium (eg, heat or electricity through metal) without any apparent change in the medium.
- 9RADIATIONa form of energy that comes especially from nuclear reactions
(heat from a light bulb) - 10COOLEST STARM: Red stars, <3,500K
- 11What type of star is the sun?A yellow dwarf star. A GV star between 5,300 and 6,000 K
- 12ABSOLUTE MAGNITUDEthe apparent magnitude a given star would have if it were situated at a distance of 10 parsecs (32.6 light years) from the earth
- 13APPARENT MAGNITUDEbrightness of an object in the absence of the Earth’s atmosphere (which can scatter some of the light, causing it to dim).
- 14ABSOLUTE./APPARENT MAGNITUDE FORMULAM=m-5xlog(D/10)
M=absolute magnitude
m=apparent magnitude
D=distance in parsecs - 15MAGNETOSPHEREregion around a planet that is influenced by that planets magnetic field
- 16STEADY FLOWType of flow in which fluid characteristics like V, Pressure and density etc. at a point do not change in time
- 17VISCOUS FLOWType of fluid flow in which there's a continuous steady motion of particles, motion at a fixed point always remaining constant
- 18HALF-LIFETime it takes for one half of nuclei present to disintegrate
T1/2=ln2/λ - 19V=Vo+atX=V0t+1/2at^2
V^2=V0^2+2ax - 20F=G m1+m2/d^2M1 - mass of object, M2-mass of eg.Earth
In m3kms2 - 21pghA=weight of fluid displacedp=Density
g=gravity
h=height of liquid
A=area - 22PE=mghKE=1/2mv^2
- 23V=2pir/T...
- 24Fb=Wfluid..
- 25Hooke's LawF=-Kx
- 26MASSMeasurement of how much matter is in an object
- 27WEIGHTHow hard gravity is pulling on an object
Information
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- Definitions and notes on Experimental Physics.
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- Merissa C
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