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Uworld > Formulas > Flashcards

Formulas Flashcards

1
Q

Ideal gas law

A

PV = nRT

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2
Q

R is equal

A

0.08 Latm / mol K

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3
Q

Molarity formula (molar concentration)

A

M= mol / V

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4
Q

Molar formula

A

mol = m/MW

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5
Q

Fraction remaining of the half life is

A

1/2^n
n- number of half lives

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6
Q

Energy photon formula

A

E = hc/ wavelength or E= h* frequency

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7
Q

Planck’s constant is

A

h= 6.6 * 10^-34 J*s

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8
Q

Speed of light is

A

c = 3.0 * 10^8 m/s

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9
Q

Frequency formula

A

f = c/wavelength

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10
Q

Density formula

A

p = mass/volume

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11
Q

Cube volume formula

A

S^3

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12
Q

Measures activity formula

A

1/2^n * initial activity
While initial activity= 2^n * measured activity

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13
Q

Total percent mass of the solution in the combine mass

A

Solute mass / (solute mass + solvent mass) *100%

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14
Q

ppm formula

A

Mass of solute (mg) / mass of solution (kg)

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15
Q

Unit conversion

A
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16
Q

Percent yield formula

A

Extent at which the starting materials are converted into products

(Actual field/ theoretical yield) * 100%

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17
Q

Kw formula

A

(H3O+) (OH-)= 1 * 10e-14

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18
Q

pH formula

A

pH = - log (H3O+) = -log (H+)
If OH is a reactant than pH decreases because H3O increases and vice versa

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19
Q

Power formula

A

Watts
P= Work/time = PE/t = mgh/t or KE/t = 0.5 mv^2
Or P = work/time = F*v

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20
Q

Heat formula

A

q = mc delta T

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21
Q

Pressure formula

A

P= Force/ Area

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22
Q

Work formula

A

W= F * d= P * delta V
or W= delta KE = KEf -KEi

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23
Q

Area of triangle

A

1/2b * height

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24
Q

Elastic force is

A

Fel = -kx
k - spring constant ( on the graph it equals slope = delta y/ delta x)

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25
Q

Torque equation

A

= r* F sin angle = r* F

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26
Q

Elastic pontential force

A

1/2 kx^2

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27
Q

Acceleration

A

v/t
m/s^2

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28
Q

Velocity is equal to

A

v= d/t

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29
Q

How many ms in 1 seconds?

A

1s = 1000 ms

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30
Q

Accelerated motion formula

A

d = v0 * t + 1/2 at^2

31
Q

Total mechanical energy is

A

PE + KE

32
Q

Smells law of light refraction

A

n1 sin angle1 = n2 sin angle 2
n1/n2 = sin angle 2/ sin angle 1

33
Q

Coefficient of kinetic friction equals with angles

A

Sin angle / cos angle

34
Q

Potential energy of a spring

A

Uel = 1/2 kx^2

35
Q

Joules is equal

A

N*m

36
Q

Magnification of two Lens system

A

M= M1 * M2

Or M= image/ object

37
Q

Translational motion equations

A

v^2 = v0^2 + 2a delta x

38
Q

1 kJ is equal to J?

A

1000 J

39
Q

Cardiac output and area relationship

A

CO = Area * velocity

40
Q

Kinetic energy

A

1/2 mv^2
KE = Work

41
Q

Friction force

A

Ff = uk * mg
Applied force = Ff

42
Q

Slope

A

Rise/run

43
Q

Horizontal and vertical components of motion

A

vx = v cos theta
vy = v sin theta

44
Q

Elastic force by Hookes Law is

A

Force that is needed when displacing a spring or other elastic object from its equilibrium point. Acts oppose the extension meaning toward the equilibrium point.
Fel = -kx

45
Q

Magnitude of vector is equal

A

d = sqrt x^2 + y^2

46
Q

Acceleration with force

A

a = Fnet / m
Fnet = - Fk

47
Q

Newton second law

A

F= ma

48
Q

Photon energy formula

A

E= h* f

49
Q

Thermal expansion is

A

Delta L = a L delta T for solids
Delta V = aC delta T for liquids

Length or volume of a substance directly proportional to its change in T

50
Q

Gravitation Potential energy

A

PE= mgh

51
Q

Tension formula

A

T = Weight = mg

52
Q

Cos 60 degrees and sin 60 degrees

A

0.5
0.9

53
Q

Horizontal and vertical components tension

A

Tx = T cos
Ty = T sin

54
Q

Heat formula

A

q = mc delta T
q= mL where L is the heat transformation or latent heat

55
Q

Entropy

A

Delta S = S system + S surroundings > 0
S = Qrev / T

56
Q

Sqrt of 2 is

A

1.4

57
Q

Sqrt of 3

A

1.7

58
Q

Joules unit

A

Kg* m^2 / s^2

59
Q

Watt is equal unit

A

J/s

60
Q

Newton’s third law of motion

A

F a on b = -F b on a

61
Q

Buoyant force is

A

Object in fluid
Fb = density* g* Vfluid

While W (weight) of the object = density of object* g* V of object

Cos a floating object Fb = weight of the object ( mg)

62
Q

First law of thermodynamics

A

Delta U = W + Q
U- internal energy
W = P delta V

63
Q

1 kJ is how many joules?

A

1000 J

64
Q

Heat capacitance equation

A

C = q / delta T. (J/K). Or C= mc
Amour of heat required to change the T of an object by 1 degree

65
Q

Electric force formula

A

Fe = q (charge) * E (electric field)

E = F/q

66
Q

Period of motion

A

T = distance / speed
T= time it takes to complete one full circle of motion
Where distance is 2pai *radius

67
Q

Radiation dose

A

Dose = energy / mass

68
Q

Joules unit is

A

N * m

69
Q

Watts unit

A

J/s

70
Q

Pressure is

A

P= force / area

71
Q

Mechanical advantage

A

Work done by the output force= work done by the input force
Fidi = Fo do

F0/ Fi = d0 di

72
Q

Center of mass

A

CM= m1r1 + m2r2 + m3r3…/ m1+ m2+ m3

73
Q

Specific rotation formula

A

specific rotation = observed rotation / (concentration g/ml * path length (dm))

Uworld (24 decks)

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