Respuesta :

A dust particle weighs 7.42 × 10-10 kilograms. 

Weight of 5 × 106 dust particles = 5 × 10^6 x 7.42 x 10^(-10)

= 5 x 7.42 x 10^(6-10)

= 37.1 x 10^(-4)

= 3.71 x 10^(-3) kilograms

If the weight of a dust particle is 7.42*[tex]10^{-10}[/tex] kilograms then the weight of

5*106 dust particles is 3932.6*[tex]10^{-10}[/tex] kilograms.

What is weight?

Weight is basically mass of a body which puts a downward force on body. It is expressed in kilograms, grams, etc.

How to calculate weight?

We have been given weight of 1 dust particle be 7.42*[tex]10^{-10}[/tex] kilograms and we have to find the weight of 5*106 dust particles.

Number of dust particles whose weight is to be found=530

Weight of 530 dust particles=weight of 1 dust particle* 530

=530*7.42*[tex]10^{-10}[/tex] kilograms

=3932.6 *[tex]10^{-10}[/tex] kilograms

Hence the weight of 530 dust particles is 3832.6 *[tex]10^{-10}[/tex] kilograms.

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