Answer:
1. Protons
Explanation:
In a neutral atom, the number of electrons equals the number of protons within the atom.
Protons are the positively charged particles
Electrons are the negatively charged particles
Neutrons do not carry any charges.
Therefore, the number of protons and electrons in a neutral atom is the same and this leaves a net zero charge on the atom.
Ions usually have varied number of protons and electrons.
Formula:
F = ma
m = F÷A
m: mass F:force A: accelerarion
m = 450N ÷ 15m/s^2
= 30kg
Hope this helps :)
:
change in potential energy , ∆Ep = 156.8Joules
Explanation:
Given;
Mass of object , m = 2.0 kg
Heights ; h₂ = 5.0m
h₁ = - 3.0m
To obtain
the change in potential energy, ∆Ep = ?
But,
∆Ep = mg∆h
Where;
m is the mass of the object (kg)
∆h = h₂ - h₁ is the change in height (m)
g is the acceleration due to gravity ( 9.80 m/s²)
Therefore,
the change in potential energy, ∆Ep = 2.0 × 9.80 × ( 5 - (- 3))
=156.8 joules
The amount of heat in the body in joule
Answer:
Because if they dont research first they will be unprepared
Explanation:
