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valentinak56 [21]
2 years ago
15

The human eye cannot see anything less than 40 micrometers in size. What is this length in meters?

Chemistry
1 answer:
Agata [3.3K]2 years ago
6 0

Answer:

4e-5 is the length in meters

Have a nice day! :)

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a book with a mass of 1 kg is dropped from a height of 3 m. what is the potential energy of the book when it reaches the floor?
mafiozo [28]
Well, first of all, the formula for finding potential energy is;
PE=mgh
  Where; m is the mass
               g is the gravitational force or acceleration due to gravity
                h is the height. 
   Anyway, according to the question, the mass is 1kg, the acceleration due to gravity has a constant value of 10ms² . And the height is 3m. Now you just have to use all these in the formula. So;
mgh= 1 x 10 x 3. That will be 30. And the unit of potential energy is Joule. So the answer is 30 joules. Hope i helped. Have a nice day.     
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