Answer:
Since this is old, im just gonna get these points, don't wan't them to go to waste lm.ao
Explanation:
A Beam balance (or Beam scale) is a device to measure weight or mass.
see attachment
all four questions have been explained in attachment
they are similar because both human and blue whales are mammals and produce live young a well as both needing oxygen from the air. Blue whales inhale and exhale from their blowhole kind of like a humans nose .
Explanation
Acceleration acts always in the direction. Of the displacement. Of the initial velocity.