Its becuase weight and mass are different. Even if an object weighs more than another object it might not have more mass than the other object.
Forgot answer choices but it would be LONGITUDINAL WAVES<span />
Answer:
Electromagnetic waves travel in vacuum where as mechanical waves don't. The mechanical waves need a medium like water, air, or anything for it to travel. While mechanical waves are cause by wave amplitude and not by frequency, electromagnetic waves are produced by the vibration of the charged particles.
Explanation:
