Maths, chemistry,physics and English

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Physics

Einstein Equation formula

E = W• + K.E
hf = hf• + ½ mv²
hf = hf• + ev
Energy of photon = work function + Kinetic energy

Electron volt and kinetic energy.

ev = ½mv²
ev = K.E
ev = hf

e = electron charge = 1.6×10^-19C
V = accelerating voltage or potential difference (V)
v = velocity of electrons ms-¹
m = mass of electron 9.1×10^-31 Kg
K.E = kinetic energy (J)
h = Planck's constant = 6.63×10^-34 Js
f = frequency of electron (Hz)

welcome back sorry for the delay 🙏
ENGLISH

The man no longer feared his opponents after their spokesmen had assured him that they were well disposed......... A.to B.towards C.around. D.about. E. For What is the correct option?

Equation of motion
V=u+at
S=ut+½at²
V²=u²+2as
How do we derive this formulae?
Rrcall, acceleration = final velocity -initial velocity/time interval. I.e, a=v-u/t.
Cross multiply, you get, v-u= at,
Then rearrange it, you get v= u+ at. We continue in next class. If you can complete the remaining, fine, you post it . Thanks

Hi friends, so sorry for not posting, very soon we'll start our lessons. Thanks

ENGLISH LANGUAGE .
what is the meaning of this idiomatic expression 'carved or set in a stone' ?

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Answer for last question

Charles law state that at a constant pressure, the volume of a given mass of gas is directly proportional to its absolute temperature.

what is Charles law?

Answer for last post is 1/2 cause quarter plus quarter is half

1/4+1/4 equals what?

Is spit an acid or a base??🤔

pls, good day everyone, who can solve this question and give me d accurate answer
on physics, get the topic urself
A hunter wants to fire a bullet in such a way that it's horizontal range is equal to 3 times its maximum height. At what angle should he fire the bullet to achieve it.

pls, it's not a must u write d solving, I need only d topic and correct answer. rack ur brain pls science students.

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in chemistry, what and what will you mix to produce electricity?

1x2x2x1x1x1x1x2x3x4x8x0x2x0x1x2x0x1x1x2x0x1x2x2x4=

what is the plural of o**m

previously on maths, the answer is

please invite people to like page
and post Questions to test our intelligence

Previously on English.
the sky is vomiting:
ANS:Personification

next
Mathematics
solve this:

please like page, and invite friends. thanks

Previously on CHEMISTRY
the atomic mass of magnesium is 24

ENGLISH
the sky is vomiting : what figure of speech is this.
like page

CHEMISTRY
What is the atomic mass of magnesium

this page is all about maths chemistry and English, no addition. thank u