A large block of wood and a small block of iron each register ...

[jrubin]

A large block of wood and a small block of iron each register 2000 N on a weighing scale. Taking buoyancy of air into account, which has the greater mass?
 
  A) wood
  B) iron
  C) both the same

Question 2

An umbrella tends to jerk upward on a windy day principally because
 
  A) air gets trapped under the umbrella, which warms, and rises.
  B) buoyancy increases with increasing wind speed.
  C) air pressure is reduced over the curved top surface.
  D) all of the above

[elizabethrperez]

Answer to Question 1

Answer: A

Answer to Question 2

Answer: C

[jrubin]

Thank you!

[elizabethrperez]

Always glad to help...