guys please answer atleast 31 no.
Answers
Name two kind of charges? What are the properties/nature of electric charges?
➜ The property which differentiates the two types of charges is called the polarity of charge.
The two types of electric charges are:
Positive and Negative, commonly carried by charge carriers protons and electrons.
Examples of the types of charges are subatomic particles or the particles of matter:
protons are positively charged
electrons are negatively charged
neutrons have zero charge.
what are the two factors on which friction depends on?
➜ The friction force depends on two factors:
a) The materials that are in contact. The two materials and the nature of their surfaces.
b) The force pushing the two surfaces together. Pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other.