Ratio of acceleration due to grabity and universal gravitational constant

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)

Which of these questions might a character ask if the conflict is man versus self? a. which path should i take to better myself? b. which boulder will be too heavy for me to carry? c. which friend is going to ditch me today? d. all of the above