Protons are positive, and neutrons are negative, electrons are neutral. I’m not sure about the rest but I hope that helps for now
Answer: Chopping carrots is a chemical change because you aren't changing the property its substance, you are just chopping it up, there is no new substance being formed.
Explanation:
the number of neutrons may b 21
Answer:
42.99°
Explanation:
= Kinetic friction force
= Pulling force at angle 
= Weight of the box = 150 N
Kinetic friction force

Pulling force at angle 

N = Pulling force
According to question

Applying Newton's second law in the vertical direction we get

The angle is 42.99°