Answer:
The box will move toward you with a force of 10N
Explanation:
If you and your friend are pushing the same box with the same amount of force, those two forces will balance each other out, and the box won't move. In the question, 20N will cancel each other out, and there will be 10N. Your friend is pushing the box with more force than you, so it will move toward you with the remaining force of 10N
Answer - The polarity of the water molecule helps it to cohere to nearby water molecule. Forming a skin over.
Reasoning - Since the polarity is all close and wanting to bond they have a surface tension which come together to making a skin like over.
Total Body Fat
this is to compensate for lower caloric output.
nitrogen that cannot be used by organisms