Answer: the answer is 100 focal length.
Explanation: mark brainliest PLEASE
Answer:
Gravity is one major force that creates tides. In 1687, Sir Isaac Newton explained that ocean tides result from the gravitational attraction of the sun and moon on the oceans of the earth (Sumich, J.L., 1996).
Explanation:
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Answer:
54 kg
Explanation:
Mass of person = 93 kg = 
Mass of water = 62 kg = 
Dividing the above two masses we get

Hence, the mass of the person is 1.5 times the mass of the water in them
Now, Mass of person = 81 kg = 

So, the mass of water in a person that has mass of 81 kg is 54 kg