Physics Flashcards
Spring potential energy
Uspring = 1/2 kx²
Total Mechanical Energy
E = U + KE
E = mgh + 1/2mv²
Hooke’s Law
F = -kx
This tells us the stiffness, the spring constant, and the constant of proportionality.
Conservation of Energy equation
W = ∆U = mg∆h
Also K1+U1 =K2+U2
What is the relationship between volume and Buoyant Force?
Direct
Buoyant force Equation(s)
F = density * acceleration of gravity * Volume
Note: Volume can be solved by multiplying the length, width and height
Dalton’s Law of Partial Pressures
Ptotal = P1 + P2+ …
P(partial press. of a gas) = n(moles of the gas) * Ptotal
Note: Can use the second equation to find total pressure when given one pressure or partial pressure when given other two variables
To find total pressure, we need to know the MOLES of the gases, not the grams.
Charles’ Law
Temp has a direct relationship with volume (when constant pressure and moles)
Gay-Lussac’s Law
Temp has a direct relationship with pressure (when constant volume and moles)
Avogadro’s Law
Number of moles has a direct relationship with volume (when constant pressure and temp)
Boyle’s Law
Only inverse law (if two terms are on the same side of the equal side they are inverse PV=nRT)
Pressure has an inverse relationship with volume (when constant temperature and number of moles)
Gas Constant (R)
R = 0.082 L* atm/k * mol
Standard Temp, Pressure, Volume
273K
1 atm
22.4L
Relationship between C, F, and K
°C = K - 273
°C = (32°F − 32) × 5/9
K = °C + 273
Equations for Heat Capacity and Specific Heat
q = mc∆T
mc = heat capacity
Sublimation
Solid to gas
Big requisite for Work to occur
THere. has to be a change in volume.
If pressure and volume are constant…
Change is enthalpy (∆H) equals change in internal energy (∆U)
Enthalpy Units
J/mol
Specific Heat Units
cal/g*K
Enthalpy equation
∆H = ∆U + P∆V
Cardiac Output Equation
Area x Velocity
Energy in a Capacitor equation
U = 1/2CV²
Units for capacitor: F
Units for voltage: V
When circuit components are in parallel…
… they have the same voltage.
Calculating Electric Power
P = IV = I² x R = V² / R
Units are Watts or J/s or kgm²/s^-3
A way outside of Ohm’s Law to solve for current…
I = Q / t
Units are Coulomb/sec or Ampheres
How do you find specific rotation of a plane-polarized light?
Specific rotation = (observed rotation)/ (Concentration x path length)
Rotation in degrees
Concentration in g/mL
Path length in dm/decimeters)
