Formula's Flashcards by Chiamaka Achinulo

Q

Formula of calculating speed

A

speed = distance/time

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Q

Average speed=

A

total distance traveled/total time taken

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Q

velocity=

A

displacement/time

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Q

acceleration=

A

final velocity-initial velocity/time taken

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Q

acceleration due to gravity =

A

Final velocity-initial velocity/time taken

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Q

weight=

A

mass × gravitational field strength

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Q

Density=

A

mass/volume

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Q

Hooke’s law

A

force = spring constant × extension

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Q

Newton’s 2nd law

A

Force=mass×acceleration

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Q

specific heat capacity=

A

heat energy/mass×change in temp

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Q

Specific Latent heat of fusion

A

heat energy/mass

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Q

Specific latent heat of vaporization

A

heat energy/mass

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Q

Wave equation

A

speed = frequency×wavelength

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Q

Relationship between frequency and time period

A

frequency=1/time

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Q

Speed of echo

A

v=(2×d)/t

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Q

Refractive index

A

n=sini/sinr

Q

Reflective index for critical angle=n

A

n=1/sinc

Q

Pressure in liquids

A

P=height×density×acc.due gravity

Q

Boyle’s law

A

pressure ×volume=constant

Q

Charlie’s law

A

volume/temperature=constant

Q

Pressure law

A

Pressure/temperature=constant

Q

Thermal capacity=

A

heat energy/change in Temp OR
mass×sp. Heat capacity

Q

Heat energy=

A

mass×specific Heat capacity×change in temperature

Q

Heat energy=

A

mass×specific Heat capacity×change in temperature

Q

Electric current=

A

charge/time

Q

Electric charge=

A

current × time

Q

Ohm’s law

Remember it deals with electric current

A

voltage=current × resistance

Q

Electronic power

A

power=voltage×current

Q

Other formulas of electronic power

A

P=I^2R & P=V^2/R

Q

Electrical energy=

A

voltage×current×time

Q

Two resistors in series

A

R=R1+R2

Q

Two resistors in parallel

A

R=R1×R2
R1+R2

Q

For three resistors in parallel

A

1 = 1 + 1 + 1
R R1 R2 R3

Q

Np = Vp
Ns Vs

A

Q

power of primary coil = power of secondary coil

A

Vp×Ip=Vs×Is

Q

Resistance=

A

pl/A

Q

moment

A

force × perpendicular distance