Q133 of 196 Page 249

An inch is approximately equal to 0.02543 metres. Write this distance in standard form.

Given 1 inch = 0.02543 metres


⇒ 0.02543 = =


We know that by laws of exponents, .


⇒ = 2.543 × 10-2 metres


∴ In standard form, 1 inch = 2.543 × 10-2 metres.


More from this chapter

All 196 →
131

This table shows the mass of one atom for five chemical elements. Use it to answer the question given.


A. Which is the heaviest element?


B. Which element is lighter, Silver or Titanium?


C. List all five elements in order from lightest to heaviest.

 132

The planet Uranus is approximately 2,896,819,200,000 metres away from the Sun. What is this distance in standard form?

 134

The volume of the Earth is approximately 7.67 × 10–7 times the volume of the Sun. Express this figure in usual form.

 135

An electron’s mass is approximately 9.1093826 × 10–31 kilograms. What is this mass in grams?