मोहम्मद अली जिन्ना ने भारत में कितने राष्ट्र बताएं​

Answer:

Every student has come.

Answer:

I want need and importance of the project, Hypothesis,Materials and apparatus,work plan

How is a dam prepared

1. First, we need to start with diverting the river.
2. Second step includes laying the foundation of the dam.
3. Third step will be to start the building of dam
4. The reservoir needs to be filled in the next step.
5. Testing the working of dam.
6. Checking if the valves and the floodgates work properly.
7. Monitoring the behavior of the newly built dam.

Water storage in dams

• Dams are used to store water.
• Water is stored as a reservoir behind the dam.
• Dams are constructed on a river, and they work as an obstruction for the water of the river flowing downwards.
• Thus, creating a reservoir behind the dam storing water.

Watershed

• A common reservoir in which the water from several resources is stored.
• The resources can be diverted rivers, water from lakes or any other source.
• The water from all these is stored at a single place that acts as a reservoir.

Water Distribution

• The water that is stored in the dam are then distributed.
• The water stored in the dam can be used for various sources.
• It can be distributed to industries, to farms and households and any other area where the basic and important requirement is water.

Electric Power Generation

• the electricity produced by the water stored in the dam is called hydroelectric power.
• The water in a dam is stored at a height i.e., almost equivalent to the height of the dam.
• The water at this height has some potential energy.
• When the dam is opened, the potential energy is converted to kinetic energy and there are meters that this running water having a great energy rotates.
• In this way electrical energy is produced with the help of hydro energy of water.

#SPJ2

Air has weight

Air occupies space

According to the definition, matter is something that occupies space and has mass. When a balloon is filled with air, it becomes bigger in size and it can be weighed. It proves that air occupies space.

Answer:

Experiment: An empty glass tumbler is inverted inside the bowl. When the tumbler is tilted, bubbles are seen in water. Observation - The air was occupying space inside the tumbler, and on tilting air is displaced and bubbles come out because of that. Conclusion - Air occupies space.

Experiment : Take two balloons having same mass . Fill air in one balloon while leave another balloon with out air . Now take a balance and find the weight of the two balloons . You will see that air filled balloon will have higher weight than the other balloon without air , showing that air has mass.

The above-given sentences with appropriate prepositions are as follows:

1. you must watch for an opportunity. 2. the old woman is weary of life. 3. attend to your work. 4. I will comply with your request. 5. allow me to remind you of your promise. 6. I must inquire about the matter. 7. I congratulate you on your success. 8. I beg to differ from you.

• Preposition: It is a word or clause used before a noun or any pronoun.
• It represents the time, direction or location, place, time for the given noun.
• The proposition is mainly used with a noun phrase.
• Examples of propositions are about, above, across, of, from, on, in for, before, behind, beside, inside, outside, into, onto, up under, beneath, through, throughout, off, over, between, since, underneath, etc
• Different types of prepositions are the preposition of time, the preposition of place, etc.