B
The Ardi fossil is believed to be 4.4 million years old, providing evidence that humans have been on Earth for 4 million years.
That's only possible if there is absolutely zero friction in the machine.
In the real world, we can come close, with lubricants (oil, grease) and
streamlining, but we can never build anything with totally zero loss of
energy inside.
Answer:
False
Explanation:
A compass can be used to determine relative direction but not absolute direction.
