When resistors 1 and 2 are connected in series, the equivalent resistance is 20.4 Ω. When they are connected in parallel, the equivalent resistance is 3.86 Ω. What are (a) the smaller resistance and (b) the larger resistance of these two resistors?

(A) Smaller resistance will be equal to 5.175 ohm

(b) Larger resistance will be equal to 15.225 ohm  

Explanation:

Let the two resistances are and

It is given that when they are connected in series their equivalent resistance is 20.4 ohm

So ------eqn 1

When they are connected in parallel their equivalent resistance is  3.86 ohm

So

From equation 1

......eqn 2

Adding eqn 1 and eqn 2

putting this value in eqn 1

(a) Smaller resistance will be equal to 5.175 ohm

(b) Larger resistance will be equal to 15.225 ohm

d. air pressure decreases as altitude increases.

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force