Equations Flashcards
couphysics
kinematics equations
physics
newton’s first law
physics
newton’s second law
physics
newton’s third law
physics
centre of mass
physics
friction
N = perpendicular to contact surface, mg or mgcosθ on ramp
physics
gravitational force
physics
centripetal acceleration
physics
centripetal force
physics
hooke’s law
physics
torque
physics
work
+ve when F in same direction as movement
-ve when F opposes movement
W = 0 when force is perpendicular
physics
power
physics
kinetic energy
physics
gravitational potential energy
phyiscs
elastic potential energy
physics
conservation of energy
physics
work energy theorem
physics
pressure-volume curve
WORK is the area under a P-V curve
+ve W = gas expands, work done BY gas
-ve W = gas compressed, work done TO gas
physics
pulleys + mechanical advantage
W = F x d
machine DECREASES force
so distance must INCREASE
Work done stays the SAME
physics
root mean square of velocity
physics
first law of thermodynamics
+ve Q = heat flows in, -ve Q = heat flows out
+ve U = increasing temp, -ve U = decreasing temp
+ve W = work done by system (expansion)
physics
ideal gas law
physics
density
1mL = 1cm^3
1000L = 1m^3
physics
specific gravity
less than 1 = less dense, will FLOAT
physics
pressure
1x10^5 Pa = 760 torr = 1atm
physics
absolute pressure
so P increases as you get deeper
physics
hydrostatic pressure
pressure from static fluid
conceptually like GPE
physics
dynamic pressure
pressure from moving fluid
conceptually like KE
physics
absolute pressure
physics
buoyant force
use density of FLUID
volume of fluid displaced = volume of submerged object
physics
pascal’s law
both pressure and volume moved on both sides is equal
can also be –> A1d1 = A2d2
physics
poiseuille’s law
ΔP ∝ 1/r^4
increase r, BIG decrease in P
physics
bernoulli’s law
fluid rises up HIGH where P is high (large Area, smaller Velocity - less dynamic pressure, so static is higher)
physics
if SPEED of fluid increases:
effect on pressure
dynamic pressure = increases
static pressure = decreases
bio Q’s usually refer to pressure as hydrostatic
physics
continuity equation
conservation of mass, fluids flow faster when A is smaller
physics
kelvin + celcius
K = C + 273
0C = 273K
delta T is the SAME
physics
thermal expansion: length
how does length change? a LOT (looks like eq)
physics
thermal expansion: volume
coefficient of VOLUME expansion = 3X length coefficient
aV = 3X aL
physics
state functions
PaPa HUGS TV
pressure (P), density (p), enthalpy (H), internal energy (U), free energy (G), entropy (S), temp (T), volume (V)
physics
heat gained/lost
q = mcΔT
physics
electric field
where q is a test charge (+ convention)
E = N/C
physics
coulomb’s law
electrostatic force between 2 charges (magnitude)
physics
electric potential energy
still N x m = Joules
work required to move a charge here from **infinity **
EPE high when 2 like charges brought CLOSE
EPE high when 2 opposite charges SEPARATED more
physics
electric potential
- VOLTAGE
- ratio of charge’s EPE to the magnitude of charge itself Volts, scalar
physics
voltage
ΔV = Vb - Va
potential difference
physics
magnetic field around a wire
- use RHR (thumb = I, fingers = field)
- for a LOOP wire, same eq without pi (same RHR)
physics
magnetic force on a charge
- so when angle = 0 or 180 (parallel/antiparallel) there is NO FORCE force highest when angle is 90
- direction of force = RHR (fingers=field, thumb = velocity of charge/current of wire, palm=force)
- if charge is (-), force direction is opp (back of hand)
physics
magnetic force on a current carrying wire
- same RHR but thumb = current
physics
resistance
directly proportional to length
inversely proportional to area
physics
ohm’s law
physics
power (circuits)
power dissipated by each resistor
physics
current in series
physics
voltage in series
physics
resistance in series
physics
current in parallel
physics
voltage in parallel
physics
resistance in parallel
physics
capacitance
physics
capacitance: equation 1
physics
capacitance: equation 2
physics
E field between capacitor plates
physics
capacitance in series
physics
capacitance in parallel
physics
speed of wave
physics
speed of sound
physics
decibel level
physics
doppler effect
- mnemonic: observer = detector (d), and source (s) — d / s = dom / sub ;)
- ignore the observer +/-, observer NEVER MOVES
- so becomes v / (v +/- Vs)
- subtract source speed when moving towards
physics
intensity of sound
I = A^2
I = 1 / d^2
so… **intensity directly prop. to area squared (high area = high intensity)
intensity inversely prop. to distance squared (high distance from source, low intensity)
physics
strings and open pipes: wavelength and freq. formulas
physics
closed pipe: wavelength and freq. formulas
n (harmonic) only ODD INTEGERS
physics
energy of EM wave
physics
refractive index
physics
snell’s law
physics
single-slit diffraction
physics
double-slit diffraction MAXIMUM
physics
double-slit diffraction MINIMUM
physics
thin lens equation
physics
magnification
physics
power of a lens
physics
mass-energy equivalence
physics
alpha decay
physics
beta-minus decay
physics
beta-plus decay
physics
gamma decay
physics
electron capture
physics
exponential decay
physics
half life
chem
formal charge
chem
percent yield
chem
equilibrium
chem
Q vs Keq
chem
heat
chem
gibbs free energy
chem
gibbs free energy of a reaction: compared to standard
chem
gibbs free energy at equilibrium
chem
parial pressures
chem
boyles law
chem
charle’s law
chem
gay-lussac’s law
chem
molality
chem
arrhenius equation
chem
rate of reaction
chem
pH
chem
henderson hasselbalch equation
chem
cell potential Ecell
chem
nernst equation
chem
electroplating: moles of metal
chem
michaelis-menten kinetics
chem
beer-lambert law
