The solar system formed when gravity began collapsing a cloud of gas, rock, ice, and other materials. Where did the gravity come from to initiate this collapse? Explain.

What are chlorofluorocarbons and what impact do they have on the atmosphere?

Write the function getkthdigit(n, k) that takes a possibly-negative int n and a non-negative int k, and returns the kth digit of n, starting from 0, counting from the right

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?