1) Using the distance from the Sun to the Earth in meters, calculate its brightness on the Earth in W/m^2. Use the formula Brightness= Luminosity/(Area of the Sphere)
2) Using the same method as in step 1, calculate the brightness of the Sun in Mercury.
3) Using the formula for the magnitude difference − = . (), what is the

difference of magnitudes of the Sun between the Earth and Mercury? (use the log function of your calculator).
4) Does the sun have a higher or lower apparent magnitude on the Earth than in Mercury? Explain your answer.

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the total distance traveled by the car is

30km + 49km = 79 km .

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.