أكاديميا - كولنز - معاجم الجيب العلمية - الفيزياء - الجدول 3 التعابير _١_

Academia - Collins - Pocket Scientific Dictionaries - Physics - English - French - Arabic - Appendix - Table 3 Expressions _1_

Table 3 Expressions

Here we list the main expressions used in physics throughout this book. The expressions are listed here in the order of the names of the relevant measurements.

This table is a reference for the reader, and is used in addition to Table 2 and the entries in the rest of the book. Do not try to memorize this material by heart for the exam. Rather, you must be aware of the concepts behind the equations.


Acceleration (unit: m/s2)
Acceleration (a) (unit: m/s²)

(From Newton's laws of force)

a = F/m

(definition)
a = v-u / t


Angle of incidence (unit: °)
Angle of incidence (i)

(for reflection) i=r

(for refraction) n = sin i / sin r

Reflection angle (unit: °)
Angle of reflection (r)

(From the law of reflection) r=i

Angle of refraction (unit: °)
Angle of reflection ( r )

From the law of refraction n/ sin i= sin r

Area (unit: m2)
Area(A)

(For square) A = I2

(For a parallelogram) A = Ih

(For triangle) A = 2lh

(For a circle) Α = πr² 2

(per ball) A = 4лг²

Capacitance (unit: farad)
Capacitance(c)

(for capacitors in parallel)
C = C1 + C2 + C3

For consolations in sequence
1/C = 1/C1 + 1/C2 + 1/C3


For two slab capacitors, d is the distance between the two slabs
Ca A/d

(Definition) C = Q/V

Shipment (unit: colon)
Charge(Q)

(Force in the force field E)
Q = F/E

(Definition) Q = Ot

(For a charged capacitor) Q = cv

(For a moving charge) Q = W/ V


Unit current: ampere)
Current(I)

From the definition of shipment
I=Q/t

(for circuit)
I = E / (R+r)


(for part of the circuit)
I=V/R

(capacity)
I = P/V

Density (unit: kg/m3)
Density(D)

(Definition) D = m/V

displacement, shift (unit: m)
Displacement(s)

From the definition of speed
S = vt

(equation of motion)
S = ut + 1/2at²

(equation of motion)
s = v2 - u2/2a


Distance ratio (speed ratio)
Distance ratio (Velocity ratio)

Distance ratio = voltage speed / load speed

Distance ratio = S1/S2

Efficiency

Yield = return output work / employee work x 100

Yield = mechanical advantage (force ratio) / speed ratio (distance ratio) x 100
Expressed as a percentage)

Electric field strength
Electric field strength (E)

Unit: newton/coulomb or kiloton/meter)

(Definition) E = F/Q

voltage over a distance
E=V/S

Electromotive force (unit: volt)
Electromotive force (E)

From the definition of resistance
E = I (R + r)

Energy (unit: joule) Energy (W)
(Definition) W = Fs

(how much radiation) W=hf

(For current) W = I2Rt

(to change in temperature)
W = mco

(For change of state) W = mL

(gravitational potential energy) W=mgh

(For a moving body) W = 1/2mv²

(From a definition of power) W=VIt

(For voltage) W = V2t/R

(For current) W= I2t /R

(For a moving charge) W = vQ