Read the excerpt from A Black Hole is NOT a Hole. It's terrific fun to read what the original thinkers had to say for themselves. I read parts of Relativity: The Special and General Theory by Albert Einstein, and found the letter about Einstein forgetting to eat lunch in Einstein: His Life and Universe by Walter Isaacson.

I also reviewed parts of Isaac Newton's Principia: The Mathematical Principles of Natural Philosophy (translated by Andrew Motte), to see what Newton himself had to say.

What makes these books credible sources?

The books give opinions and arguments about science.
Einstein and Newton are experts in their fields.
The books describe Einstein’s and Newton’s inner feelings.
Einstein and Newton persuade readers to their opinions.

Einstein and Newton r experts in their field

Explanation:

I hope this helps

b

Explanation:

i think the anti-race spokesman is working to achieve equality between whites and blacks and to encourage blacks to shakespeare's theory

in ray bradbury's short story "a sound of thunder", mr. eckels's fearfulness leads to drastic consequences for the rest of the world.

in the story, mr. eckels, who is a hunter, hires a time travel company to travel to the age of dinosaurs. although he is excited for the hunting expedition at the beginning, when they reach there and mr. eckels sees the tyrannosaurus, he feels frightened. as he is afraid of the tyrannosaurus, he steps off the path although he has been warned not to do it. by stepping off the path, the entire course of the future is affected: mr. eckart alters the future by stepping on a butterfly, which causes a new man to be elected president in the future. in that way, it is mr. eckart's fearfulness what triggers 'the butterfly effect' and what leads to drastic consequences for the rest of the world.