all the allials must be aligned in the same direction
magnets are affected by heat, drops, and improper storage
Explanation:
Given that,
Two resistors of resistance 6 ohm and 3 ohm are connected in series and then in parallel.
For series combination,

For parallel combination,

When 6 ohm and 3 ohm are in series,

When 6 ohm and 3 ohm are in paralle,

So, the equivalent resistance in series combination is 9 ohms and in parallel combination it is 2 ohms.
mass gram, time sec, temp kelvin, vol liter, dens grams/cm3