The fastest in speed of sound is steel. The slowest in speed of sound is oxygen. Hope this helped! I don't really know how to answer this but by looking at the table it looks like this can be one of the conclusions.

**Answer:**

**Explanation:**

Given that

L = 3 m

M = 2.4 kg

m=0.7 kg

r= L/2 = 1.5 m

The moment of inertia of rod about it center

The moment of inertia of point mass about center of rod

I'= mr² + mr²

So total moment of inertia

By putting the values

**Answer:**

**Explanation:**

The simplest kinetic model is based on the assumptions that:

(1) the gas is composed of a large number of identical molecules moving in random directions, separated by distances that are large compared with their size;

(2) the molecules undergo perfectly elastic collisions (no energy loss) with each other and with the walls of the container, but otherwise do not interact; and

(3) the transfer of kinetic energy between molecules is heat. These simplifying assumptions bring the characteristics of gases within the range of mathematical treatment.

**Answer:**

Assuming you mean how they work,

**Explanation:**

Electromagnets work by wrapping the wire around an iron core and attaching it to an electric charge.