<h2>Speed = Distance/Time</h2>

If a train travelled 500 meters in 25 seconds then,

Speed = 500m/25sec

<h2>

**→** **2****0**** ****m****/****sec**</h2>

Answer:

-1.4N

Explanation:

When the distance between A and B is 13.8mm (0.0138m), the force exerted by A on B is 2.65N:

F(A,B) = k*qA*qB/r²

=> 2.65 = k*qA*qB / 0.0138²

=> k*qA*qB = 2.65 * 0.0138²

k*qA*qB = 0.0005046

When the distance between them increases to 19mm (0.019m), the force exerted by A on B becomes:

F(A,B) = k*qA*qB / 0.019²

Given that k*qA*qB = 0.0005046,

F(A,B) = 0.0005046/0.019²

F(A,B) = 1.4N

The force exerted by B on A will be in the opposite direction of the force exerted by A on B, which means that the force exerted by B on A will be:

F(B, A) = -1.4N

**Answer:**

The student that says the phrase "travels through liquids" goes in the middle, in between the two circles in the venn diagram.

**Explanation:**

**Answer:**

Orbital period of the planet will be 207.06 year

**Explanation:**

We have given the planet have the semi major axis as 35 au

We have to find the orbital period of the planet

From Keplar's third law there is relation between the orbital period and semi major axis which is t

So

So orbital period of the planet will be 207.06 year

Explanation:

Below is an attachment containing the solution.