A <u>Food web</u> is multiple overlapping food chains.
I think the answer is c but I'm not sure
Answer:
The lowest energy of electron is the ground state.
Explanation:
Oil is a lubricant which helps increase friction. when u spread sand on a place where oil is spilled the sand reduces friction between road and vehicle tire. the vehicle wont skid.
Answer: a)
1.99 x 10⁻⁹N
b) Electric force is 1.24 x 10³⁶ times larger than gravitational force
Explanation: <u>Electric</u> <u>Force</u> is an interaction between two charges at a distance. It is calculated as

k is electric constant that values 9 x 10⁹N.m²/C²
q and Q are the quantity of charges
r is distance between the charges
a) For the two protons, charge = 1.602 x 10⁻¹⁹C:

1.99 x 10⁻⁹ N
Magnitude of electric force between 2 protons is 1.99 x 10⁻⁹ N and it is repulsive because they are both positive
<u>Gravitational</u> <u>Force</u> is the force of attraction that acts between all materials.
It is proportional to the object's masses and inversely proportional to their squared distance:

G is gravitational constant that values G = 6.67 x 10⁻¹¹ N.m²/kg²
b) For the two protons, m = 1.67 x 10⁻²⁷kg

1.61 x 10⁻⁴⁵N
Comparing electrical and gravitational forces:

1.24 x 10³⁶
This shows that electrical force is <u>1.24 x 10³⁶</u> times greater than gravitational force.