3 years ago

Describe all the characteristics of Earth that make it ideal for living creatures.

Physics

2 answers:

Lady_Fox [76]3 years ago

8 0

Earths atmosphere, Temperature, Plant life and Oxygen I guess

Effectus [21]3 years ago

7 0

Earth's atmosphere, Temperature, Plant life, Oxygen, It's shielded from radiation, and it has lots of water.

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A pitcher can throw a baseball at about 90 miles/hour (about 39.6 m/s). What is the ratio of the kinetic energy to the rest ener

tester [92]

Answer:

$8.71*10^{-15}$

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the ratio can be expressed as

$\frac{Kinetic Energy}{Rest Energy}=\frac{\frac{1}{2}mv^{2} }{mc^{2}}\\since V=39.6m/s\\C=3*10^{8}m/s\\\frac{Kinetic Energy}{Rest Energy}=\frac{\frac{1}{2}39.6^{2} }{(3*10^8)^{2}} \\\frac{Kinetic Energy}{Rest Energy}=\frac{784.08}{9*10^{16}} \\\frac{Kinetic Energy}{Rest Energy}=8.71*10^{-15}$

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