How much does the earth weigh?
What is a black hole?
How do airplanes fly?
How do flies walk on the ceiling?
Are sharks mammals?
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Answer:
1)5.972×10^24 kg
2)A hole in space which have more acceleration due to gravity and it is a dark region
3)On the principle of time of flight or Bernoulli's law
4)bcz of there sticky leg
5)sharks are not mammals
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