Lightning flashes one mile (1609 m) away from you. How much time does it take the light to travel that distance? A. 186000 s
B. 5.36x10-6 s
C. 4.83x1011 s
D. 2.07x10-12 s​

Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.

Use vsepr theory to predict the molecular geometry of the molecule hcn.