What is the difference between the energy of spring a, stretched 0.6 meters, and spring b, stretched 0.3 meters, if they have the same spring constant?

We know, E = 1/2 kx²
So, ΔE = E₂ - E₁ = 1/2 kx₂² - 1/2 kx₁²
ΔE = 1/2 k [ x₂² - x₁²]
ΔE = 1/2 k [0.6² - 0.3²]
ΔE = 1/2 k [0.36 - 0.09]
ΔE = 1/2 k [0.27]
Where, k = spring constant

Hope this helps!

When a passenger is in the car on a turn. they will most likely slide twords the door. this is because gravity is giving a pushing force twords the way it is turning. this force also acts upon the passenger, causing them to move.