Physics Flashcards
Conservation of linear momentum
m1v1 = m2v2
Volume flow rate
speed x cross sectional area
direction of magnetic force on a moving ion
perpendicular to velocity of charge & direction of B-field
how to convert arcsec to degrees?
arcsec = 1/60 arcmin = 1/60 degrees
something orbiting around the sun in different orbits will have 1 point that is always the same. What is it? Proof?
Focus of eclipse at center of sun (middle of orbit)
- Kepler & Newton’s laws
What must balance in radioactive decay equations?
sum of A (mass) + Z (atomic number) before and after the decay
What travels slower: sound waves vs. radio waves
sound waves
What has a higher frequency: sound waves vs. radio waves
radio waves
STP pressure
1 atm (760 mmHg)
conversion between atm and mmHg
1 atm = 760 mmHg
combined gas law
PV/T = PV/T
how many ppm is 1%?
10 000
1% of a million
loss of weight in water is due to ___
e.g. object weighs 5g less when completely submerged in benzene. It weighs 15g initially. Specific gravity of benzene is 0.7. What is the specific gravity of the object?
buoyancy
weight loss = mg = (5)(g) = buoyant force Buoyancy = pVg (5)(g) = pVg 5 = pV = mass of fluid 15 = pV = mass of object
p(o)/p(f) = 15/5 = 3 p(o) = 3p(f) = 3(0.7) = 2.1
When objects melt or boil, does all of the material melt at once if heat source is applied very quickly?
no
If a student did NOT remove all the moisture from the KHP before the titration with NaOH(aq), then
the molarity determined for the NaOH(aq) would
be…
Too high
Mass of KHP would be bigger than normal, so the mols found would be too big.
Mol KHP is used to determine molarity of NaOH used for titration, so will cause molarity to be too high as well.
Is momentum always conserved?
Yes, if there are no outside forces acting on the system (almost always on MCAT questions)
KE is conserved for ___ collisions
elastic
why do H undergo fusion easier than C?
C has more electrostatic repulsion forces
distance between 2 adjacent nodes
1/2(wavelength)
Voltage between capacitor plates
V = Q/C
Mechanical waves transport…
momentum & energy
What variable does not affect the voltage between electrodes?
resistance (R) of a resistor elsewhere in the circuit
Fill in the blank: cathode, anode
Net movement of charge through a circuit occurs when electrons move from ____ to ____
cathode;
anode
Current
Net movement of charge through a circuit when electrons move from cathode to anode
Bohr model
electron shells
The Bohr Model states that radiation is emitted whenever electrons move…
to orbitals of lower energy
Fusion
Melting; solid -> liquid
Parallel circuit has the same…
V
Bernoulli’s Equation states that fluid pressure in horizontal pipe is highest where …
flow speed (v) is lowest
What is the same after an explosion resulting in 2 unequal masses?
The 2 fragment will have the same magnitude of force exerted due to other fragment (Newton’s Third Law)
0
-1
electron
f, c, lambda
c = f(lambda)
energy of photon
E = hf E = hc / (lambda)
The principal quantum number is a measure of…
Approximate radial size of an electron cloud
