SOLUTION: can you show me how to work these out please: 1) The formula S=4 π r2 gives the surface area of a sphere of radius r. Jupiter’s radius is 71 492 000 metres. Use the formula

Algebra ->  Surface-area -> SOLUTION: can you show me how to work these out please: 1) The formula S=4 π r2 gives the surface area of a sphere of radius r. Jupiter’s radius is 71 492 000 metres. Use the formula      Log On


   

Question 344429: can you show me how to work these out please:
1) The formula S=4 π r2 gives the surface area of a sphere of radius r. Jupiter’s radius is 71 492 000 metres. Use the formula t0 estimate the surface area of Jupiter.
2) Atomic particles: Atoms are made up of protons, neutrons and electrons. The mass of a proton is 0.000 000 000 000 000 000 000 000 001 673kg.
This is 1836 times as heavy as an electron.
What is the mass of an electron?
How many protons are needed to make a mass of 1kg?

3) The wave length of red light is 7x10-7 m and that of violet light is 4x10-7
Metres. What is the difference between these wavelengths
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
can you show me how to work these out please:
1) The formula S=4 π r2 gives the surface area of a sphere of radius r. Jupiter’s radius is 71 492 000 metres. Use the formula t0 estimate the surface area of Jupiter.
Sub the number for r
Area+=+4%2Api%2A%2871492000%29%5E2
Do it with a calculator.
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2) Atomic particles: Atoms are made up of protons, neutrons and electrons. The mass of a proton is 0.000 000 000 000 000 000 000 000 001 673kg.
This is 1836 times as heavy as an electron.
What is the mass of an electron?
Mass of the proton is 1.673E-27 kg
Mass of the proton = 1.673E-27/1836 = 16730E-31/1836
=~ 9.112E-31 kg
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How many protons are needed to make a mass of 1kg?
# = 1/mass =~ 5.977E26 protons/kg
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3) The wave length of red light is 7x10-7 m and that of violet light is 4x10-7
Metres. What is the difference between these wavelengths
7E-7 - 4E-7 = 3E-7 (or 3*10^-7) meters