Question

Think Critically
wolle
1. We get the smell of perfume while we are sitting several metres away. Give reasons why is it
so?
2. Electricity is not considered as a matter. Give reasons why is it so?
3. A diver is able to cut through water in a swimming pool. Which property of matter does this
observation show?


Plz anyone help me it's urgent..... Tomorrow is my exam​

Answer 1

$\huge\tt\fcolorbox{black}{lightblue}{Answer}$

$\red1)$ When perfume is released it quickly changes into vapour. The kinetic energy of gas molecules is high & the rate of diffusion is high. Hence we can smell the perfume sitting several metres away.

$\red2)$Electricity is just the flow of current from the charges from the flow of electrons due to positive and negative static charges.Electricity is not matter because electricity is the movement of matter.

$\red3)$This shows that the particles of matter have spaces between them. The interparticle forces of attraction between liquid particles are not very strong hence the force applied by the diver is enough to overcome these forces of attraction.

$\sf\blue{hope\:it\:helps}$

Answer 2

Aɴsᴡᴇʀ࿐

Let Z be the number

Z = 13x + 11 where x is the quotient when Z is divided by 13

Z = 17y + 9 where y is the quotient when Z is divided by 17

13x + 11 = 17y + 9

13x + 2 = 17y since x and y are quotients they should be whole numbers . Since y has to be a whole number the left hand side should be multiple of 17

The least possible value of x satisfying the condition is 9 and y will be 7

The answer is 13*9 + 11 = 128 or it is 17*7 + 9 = 128

This is the least number possible. There will be multiple answers and will increase in multiples 17*13 = 221 like 349 , 570, etc.

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