Let's suppose that we know an object's mass and escape velocity at its surface, and we would like to find how big that object is. starting from your answer to 1a, find an expression for the radius r of a massive object with mass m and escape velocity v.

Must be negative.substance increases

There is no reason to think the results are biased or not conducted properly but you should not assume the results are correct just because they were done in a laboratory so the answer would be c. it is likely to be reliable because the results support the conclusion presented.