1 Describe Newton's achievement in unification.

2 Are Newton's calculations of gravity still useful today? Example?

3 What was Newton's embarrassing secret?

4 What was Einstein's day job and how did he have time to reinvent the universe if he was really doing an honest day's work at the office? : )

5 How does Einstein's theory of gravity conflict with Newton's theory?

6 Describe the thought experiment that is presented to illustrate the difference between the two views of gravity.

7 How long does it take for light from the sun to reach the earth?

8 What was Einstein's unification?

9 What is Einstein's definition of gravity?

10 Evidence of the relation of electricity and magnetism.

11 Who unified electricity and magnetism? How many equations does it take to describe electromagnetism?

12 What relates gravity and electromagnetism and what is so different about them?

13 What force keeps Brian Greene from going through the sidewalk on his skydive?

14 What was the new area of study in physics in the late 1920s? Why were Einstein's methods not applicable?

15 What was Einstein's quote expressing his discomfort with quantum mechanics?

16 What were the two new forces and what is the area of physics that describes these forces?

17 What were Einstein's contributions after "General Relativity"? What phenomena was he unwilling to consider?

18 What is the name of the scientist associated with Quantum Mechanics mentioned in the video?

19 If quantum mechanics is so counter intuitive, why is it important?

20 What phenomenon was the practical application of our understanding of the strong force?

21 Why is the conflict between relativity and quantum mechanics?

22 Where are the places in the universe mentioned in the video where quantum mechanics and relativity have to work together? Where else to they have to work together?

23 What is the evidence for these areas in space?

24 In string theory, what function do strings play?

25 Why is it likely that ideas about string theory will continue to move forward?

26 What is the dilemma of string theory in 1995? What was the new name for string theory after the problem was resolved?

Please answer the questions based on the video.

THE VIDEO LINK - https://www.youtube.com/watch?v=5vUzzCoArCo

PLEASE WRITE ONE OR TWO LINE ANSWERS.