How would life on Earth be different if its axis was not tilted with respect to its orbit? All places would have the same climate.

There would be no seasons.

There would be no day and night.

The seasons would be much shorter.

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)

Given the following equation: 2a1 + 3mgcl2 --> 2alcl3 + 3mg how many moles of aluminum chloride are produced from 2.5 moles of magnesium chloride?