Why is it necessary to enrich the soil?

At which latitudes shown in the image of earth do people experience the greatest tangential speed?

Which tools do meteorologists use to create weather forecasts? check all that apply. a)guesses b)computer models c)weather service maps d)data from instruments e)personal observations

The gravitational force between the sun (mass = 1.99 × 1030 kg) and mercury (mass = 3.30 × 1023 kg) is 8.99 × 1021 n. how far is mercury from the sun? 6.98 × 1010 km 6.98 × 107 km 4.87 × 1013 km 4.87 × 1024 km