Python programming – Physicspupil

Coulomb’s law states that $F$ the magnitude of the electrostatic force of attraction or repulsion between two point charges $Q_1$ and $Q_2$ is directly proportional to $Q_1Q_2$ the product of the magnitudes of charges and inversely proportional to $r^2$ the square of the distance between them:

$\displaystyle{F=\frac{Q_1Q_2}{4\pi\epsilon_0r^2}}$

_{Wikipedia on Coulomb’s law}

Roughwork.

pi = 3.1415926535
epsilon_0 = 8.8541878128e-12
charge_1 = float(input("Charge of Q_1: "))
charge_2 = float(input("Charge of Q_2: "))
distance = float(input("Separating distance: "))
force = charge_1 * charge_2 / (4 * pi * epsilon_0 * distance ** 2)
print("Electrostatic force (in Newton) is:", force)

pi = 3.1415926535

epsilon_0 = 8.8541878128e-12

charge_1 = float(input("Charge of Q_1: "))

charge_2 = float(input("Charge of Q_2: "))

distance = float(input("Separating distance: "))

force = charge_1 * charge_2 / (4 * pi * epsilon_0 * distance ** 2)

print("Electrostatic force (in Newton) is:", force)

The nucleus of a helium atom contains two protons $\sim 3.8\times 10^{-15}\,\mathrm{m}$ apart each of electric charge $+e=+1.6\times 10^{-19}\,\mathrm{C}$ . The electrostatic force of repulsion between them is

Charge of Q_1: 1.6e-19
Charge of Q_2: 1.6e-19
Separating distance: 3.8e-15
Electrostatic force (in Newton) is: 15.933609826070786

Charge of Q_1: 1.6e-19

Charge of Q_2: 1.6e-19

Separating distance: 3.8e-15

Electrostatic force (in Newton) is: 15.933609826070786

Converting between temperature scales.

$\begin{aligned} & x\,^\circ\mathrm{F}\triangleq (x-32)\times \frac{5}{9}\,^\circ\mathrm{C} & \qquad & x\,^\circ\mathrm{C}\triangleq (x\times \frac{9}{5}+32)\,^\circ\mathrm{F} \\ & x\,^\circ\mathrm{F}\triangleq (x+459.67)\times \frac{5}{9}\,\mathrm{K} & \qquad & x\,\mathrm{K}\triangleq (x\times \frac{9}{5}-459.67)\,^\circ\mathrm{F} \\ & x\,^\circ\mathrm{F} \triangleq (x+459.67) ^\circ\mathrm{R} & \qquad & x\,^\circ\mathrm{R}\triangleq (x-459.67)\,^\circ\mathrm{F} \\ \end{aligned}$

Roughwork.

degree_Celsius = float(input("Input degrees Celsius: "))
degree_Fahrenheit = degree_Celsius * (9 / 5) + 32
print(degree_Fahrenheit)

degree_Celsius = float(input("Input degrees Celsius: "))

degree_Fahrenheit = degree_Celsius * (9 / 5) + 32

print(degree_Fahrenheit)

One has a slight fever when one’s body temperature is $37.8\,^\circ\mathrm{C}$ , or in degrees Fahrenheit,

Input degrees Celsius: 37.8
100.03999999999999

1 2	Input degrees Celsius: 37.8 100.03999999999999

The rest of conversion of temperature scales, in Celsius, Fahrenheit, Kelvin, Rankine, etc., are left for the reader to code.

M	T	W	T	F	S	S
		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30	31

Category: Python programming

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