Answer: Always accelerates in a downward direction
Explanation: Gravity is pulling the ball downward
Answer:
C. is responsible for sliding friction and contact forces
Humans hear frequencies from 20 Hz<span> (low) up to </span>20,000 Hz (high)
The questions from this lot which could be tested in a scientific manner would be "what causes some people to be color-blind"
and
"what are the best shoes to wear when exercising"
Both of these questions can be tested in a scientific way through an experiment.
The answer is "B" - If there are no windows then there will be no light coming in, and therefore you don't have to worry about what time of day you do the experiment at.