Answer:
166.67 ohm
Explanation:
Complete statement of the question is :
You have a collection of six 1.0 kO resistors. What is the smallest resistance you can make by combining them?
When we connect resistors in parallel, the combination resistance is always smaller than the smallest resistance value we combine.
Parallel Combination of resistances is given as

where
= Equivalent resistance
and
are resistances in parallel.
So for the above question, we have

So parallel combination is given as

So the smallest resistance is 166.67 ohm
<span>C) Humans and their activities do not affect the natural cycles of the Earth
you can think that </span>Humans and their activities do not affect the natural cycles of the Earth.
We have a problem with three different state of the ratio of flow velocity to speed of sound.
That is,
a) Mach number to evaluate is 0.2, that mean we have a subsonic state.
The equation here for lift coefficient is,

where
should be expressed in Rad.

So replacing in equation for subsonic state,

b) In this situation we have a transonic state, so we need to use the Prandtl-Glauert rule,

c) For this case we have a supersonic state, so we use that equation,

<span>The answer is 4, 6 and 7. Gas and plasma share most similar properties. The difference lies in the fact that plasma is composed of ions and electrons (ionized gas) as opposed to gas that is composed of neutral molecules. Therefore plasma can conduct electricity while gas cannot. </span>