Answer: 
Explanation:
Given
Cross-sectional area of wire 
Extension of wire 
Extension in a wire is given by
where, 
for same force, length and material
Divide (i) and (ii)
Because the wall reflects sound waves to your ears bouncing off of the walls, even if it's in another room.
Which type needs the highest temperature to grow in?
Do all of the types make food the same way?
How long does it take for a specific type to make its seeds?
The other questions are all personal opinion
In the circuit outside of the battery the electrons have to expend all of their energy on the internal resistance of the battery which causes heating
Answer:
O²⁻
Explanation:
Number of protons = 8
Number of neutrons = 9
Number of electrons = 10
What type of atom or ion is it = ?
Solution:
Protons are the positively charged particle in an atom
Neutrons do not carry any charges
Electrons are negatively charged particles
For this atom, the number of protons helps to identify what specie it is; so this is an oxygen atom.
Now,
Charge = Number of protons - Number of electrons
Charge = 8 - 10 = -2
The charge on the atom is -2 and so it is an oxygen ion with -2 charge
The ion is O²⁻
