Midterms | Formulas

Question 1

Decay constant

Answer 1

λ = (ln(2) / T1/2)

Question 2

λ equivalent

Answer 2

0.693

Question 3

Half-life

Answer 3

T1/2= (ln(2) / λ)

Question 4

Final activity

Answer 4

Af= A0 * 0.5^(T / T1/2)

Question 5

number of half-life (n)

Answer 5

T / T1/2

Question 6

REMAINING ACTIVITY equivalent

Answer 6

ORIGINAL
ACTIVITY (0.5^n)

Question 7

Relationship of the types of hald-life

Answer 7

1 / Te = (1 / T1/2) + (1 / Tb)

Question 8

Coulomb’s Law

Answer 8

F= k (Q1*Q2 / d^2)

Question 9

Constant of proportionality

Answer 9

K= ( 8.99 * 10^9N ) * (m^2 / C^2)

Question 10

Ohm’s Law

Answer 10

V= IR
R= V/I
I= V/R

Question 11

Series Circuit Rules

Answer 11

o Rt= R1+ R2+ R3
o Vt= V1+ V2+ V3
o It= I1= I2= I3

Question 12

Parallel circuit rules

Answer 12

o It = I1 + I2 + I3
o Vt = V1 = V2 = V3
o 1/Rt = 1/R1 + 1/R2 + 1/R3

Question 13

Power

Answer 13

P= IV

Question 14

Power loss

Answer 14

P= I^2*R

Question 15

1m

Answer 15

10^(-3)

Question 16

1μ

Answer 16

10^(-6)

Question 17

1k

Answer 17

10^3

Question 18

1G

Answer 18

10^9

Question 19

kg to lb

Answer 19

1kg = 2.2 lbs

Question 20

Transformer Law

Answer 20

(Vs / Vp) = (Ns / Np)

Question 21

Turns ratio

Answer 21

Ns / Np

Question 22

Change in voltage

Answer 22

Vs / Vp