In the laboratory, a student performed an experiment in which the final length of a piece of wire was a significant measurement. In three separate experiments, the student found the length of wire after the experiment to be 23.50 mm, 25.0 mm, and 35 mm. Find the average of the three trials, to the correct number of significant figures, and decide if these measurements gave an accurate result.

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

What are atoms of the same element with varying number of neutrons

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final