Please Help!! What is the potential energy of a spring that is compressed 0.75 m by a 25 kg block if the spring constant is 85 N/m?

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Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages

What is the angular momentum of the bar about the axle?

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.