prisha821 prisha821

16-09-2022
Mathematics

Answered

HELP ME GUYS I'M SO CONFUSED

Modelling the planet Mercury as a sphere, it has a radius of 2440 km.

(a) (i) Work out an estimate in square kilometres for the surface area of Mercury.

(ii) Without carrying out a further calculation, give evidence to show whether your method gives you an underestimate or an overestimate for the surface area of Mercury.

In July 2013, the spacecraft Messenger was near Mercury at a distance of 9.75 × 101¹0 km from Earth.

Taking the speed of light to be 3 × 108 m/s,

(b) work out how long it takes light to travel a distance of 9.75 × 107 km.

Answer :

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