Anuclear power plant operates at 68 % of its maximum theoretical (carnot) efficiency between temperatures of 680 ∘c and 400 ∘c. part a if the plant produces electric energy at the rate of 1.5 gw , how much exhaust heat is discharged per hour? express your answer using two significant figures.

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.

Aplane's average speed between two cities is 600 km/h. if the trip takes 2.5 hours, how far does the plane fly?