A long horizontal wooden beam supported at its ends sags when you ...

[D2AR0N]

A long horizontal wooden beam supported at its ends sags when you sit in the middle. Due to bending, the top part of the beam is under
 
  1) tension.
  2) compression.
 
  And the bottom of the beam is under
  3) tension.
  4) compression.
 
  And the part of a beam where no tension or compression occurs
  5) along the center of the beam.
  6) along the neutral layer.
  7) both of these
  8) none of these

Question 2

If an elephant grew in proportion to twice its normal height, then the area of its ears would be multiplied by
 
  1) two
  2) four
  3) six
  4) eight
 
  and its total weight would be multiplied by
  5) two.
  6) four.
  7) six.
  8) eight.

[helenmarkerine]

Answer to Question 1

Answer: 2, 3, 7

Answer to Question 2

Answer: 2, 8

[D2AR0N]

Excellent

[FergA]

Gracias!