lizzie3545
03.07.2019 •
Physics
How many atoms with a spacing of 0.19 nm can fit in a spherical dot with a diameter of 19.1 nm.
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Ответ:
B. 10000 J
Explanation:
The possible answers are not related to the statement at all. The correct statement is:
If a 100 kg person walks up two floors in the Physics building (about 10 meters up), this person's potential energy has increased by:
From definitions of work and gravitational potential, we get the following formula to calculate the change experimented in the person's potential energy after walking up two floors in the Physics building:
Where:
If we know that
, 
and 
, then the change in the gravitational potential energy is:
The choice that best approximates this answer is B.