PLEASE HELP How do greenhouse gases affect visible and infrared light?
A.
They reflect visible light but let infrared light pass through.
B.
They reflect both visible light and infrared light.
C.
They reflect infrared light but let visible light pass through.
D.
They let both infrared light and visible light pass through.

Why does the equilibrium position of the spring change when a mass is added to the spring? will the mass oscillate around the new equilibrium position of the spring or the previous position without a mass attached to the spring? if the equilibrium position of the spring changes by 20 cm (assuming no initial mass) when a mass is added to the spring with constant 4.9 kg/s^2, what is the mass of the object attached to the spring?