Newton’s fifth law says so i’m sorry it’s just logic
Answer:

Explanation:
As we know that mass is the product of volume and density
so we will have

here we have

so we will have

so we will have


now let the position of Pluto is at origin so we have




The absolute simplest way to explain E=MC^2 is: a lot of energy from a little mass.
Answer:
- 4.2 kJ
Explanation:
We shall find out the initial temperature of the gas
PV / T = n R
20 X 10³ X .26 / T = 9 X 8.3
T = 69.6 K
Since the pressure of gas is constant
V / T = constant
V₁ / T₁ = V₂ / T₂
.26 / 69.6 = .12 / T₂
T₂ = 32.12 K
gas is cooling so there will be decrease in internal energy
Change in temperature = 69.6 - 32.12
= 37.48 K.
decrease in internal energy
= - n Cv x fall in temperature
= - 9 x 1.5 x 8.31 x 37.48 ( Cv = 1.5 R given )
= - 4.2 kJ .