Question Text
Question 2 :
Express in standard form: Charge of an electron is 0.000,000,000,000,000,000,16 coulomb.
Question 5 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1ccc4f59b460d7261ede0.PNG' />
What will the above given machine do to a 2 cm long piece of chalk?
Question 6 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1ccccf59b460d7261edeb.PNG' />
From the above figure, find a single repeater machine that will do the same work as each hook-up.
Question 10 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1ccb4f59b460d7261edcb.PNG' />
Refer to the above image.The table shows the mass of the planets, the sun and the moon in our solar system. Which planet has about the same mass as earth?
Question 11 :
Express in standard form: Size of a bacteria is 0.0000005 m
Question 13 :
Express the result in power notation with positive exponent.$(-4)^5 ÷ (-4)^8$
Question 15 :
The diameter of the Sun is $1.4 × 10^9$ m and the diameter of the Earth is $1.2756 × 10^7$ m. What is the comparison between their diameters by division?
Question 19 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1ccd2f59b460d7261edf4.PNG' />
From the above figure, supply the missing information for diagram.
Question 20 :
Find two repeater machines that will do the same work as a (× 81) machine.