# Convince them that it isn't so by calculating how much weaker (in %) gravity is 420 km above the Earth's surface. Express your answer using three significant figures.The gravity is weaker by?

Question
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Convince them that it isn't so by calculating how much weaker (in %) gravity is 420 km above the Earth's surface.

The gravity is weaker by?

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Step 1

Given:

Height, h = 420 km

Step 2

Calculating value of percentage decrease in the value of gravity at a heigh... help_outlineImage TranscriptioncloseValu of ' at height -2 whure value on the &urFaue Hhe earth of Radius o eart = q-8 m/s 6371 km 420 km (tniuen] bstituting valus n en, 2 420 km 6 371 km lt 0.8d-loo . Deereare a' - 2 Ikoo (93 durcase : Hence, at 420 Ken 'ara weaker 21. fullscreen

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