A heavy seesaw is out of balance. A lightweight girl sits on the ...

[anshika]

A heavy seesaw is out of balance. A lightweight girl sits on the end that is tilted downward, and a heavy boy sits on the other side so that the seesaw now balances.
 
  If the boy and girl both move forward so that they are one-half their original distance from the pivot point, what will happen to the seesaw? A) The side the girl is sitting on will once again tilt downward.
  B) The side the boy is sitting on will now tilt downward.
  C) Nothing, the seesaw will still be balanced.
  D) It is impossible to say without knowing the masses of the children.
  E) It is impossible to say without knowing the values of the original distances.

Question 2

For what slit separation will no 1st order double-slit-fringe appear for 550. nm light?
 
  What will be an ideal response?

[frogdreck123456]

Answer to Question 1

A

Answer to Question 2

d less than 550. nm

[anshika]

Gracias!

[bulacsom]

Thanks for the timely response, appreciate it