What is the total current and resistance for a circuit that has a 20V battery, a 5Ω light, a 15Ω resistor and a 20Ω motor all connected in series?

the current is 0.5 amperes.

the resistance is 40 ohms

Explanation:

in series, the resistances add up. thus

total resistance = 5 + 15 +20

= 40 ohms

and since all are connected in series the current is given by

current = voltage/ total resistance

= 20/40

=0.5 ampere

which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?  

answer

a 75kg dining table