Question

CLASS-10!
Please answer this!​

Answer 1

Answer:

The answer would be 90° West.

How?

Let me explain.

The station A is at 60° West with local time 6:30 PM.

Station B has local time 4:30 PM.

Now,we can find that the time difference between the two stations is two hours.

Since 15° is covered in one hour, in the same way 2 hours would cover 30°.

Simply add 30 degrees to station A location i.e 60°.The answer would be 90°.

It's direction would be towards East of the Station A because station B is ahead of station A in time.

So it would be 90° West.

Answer 2

Explanation:

1.

With rapid advance in science, the number of discovered element increased it was difficult to study and remember each element.

2.

Li, Na, K

3.

True.

4.

It was successful only till Copper.

It was unsuccessful for the arrangement of heavier elements.

5.

Na,Si,Cl=No

Be,Mg,Ca=Yes