With regard to the physics of power systems used operate robots,
which
statement or statements are most correct?
A : hydraulics involves the compression of liquids
B : hydraulics involves the compression of air
C : pneumatic involves the compression of air
D : chemical batteries produce AC power
which
statement or statements are most correct?
A : hydraulics involves the compression of liquids
B : hydraulics involves the compression of air
C : pneumatic involves the compression of air
D : chemical batteries produce AC power