Give me All questions answer please I need All answer please
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Answer:
1ans.Potential difference between any two points is defined as the amount of work done in moving a unit charge from one point to another
\(dv = \frac{dw}{dq}\)
The potential difference between points A and B, VB-VA, is defined as the shift in the potential energy of a charge q, divided by the charge, shifted from A to B. Joules per coulomb, given the term volt (V) after Alessandro Volta, are units of potential difference.
Point 1:
If a positive charge is moved from a point at a higher potential to a point at a lower potential energy is liberated.
Point 2:
In actual practice electric charge moves from lower potential to higher potential here there is a loss of energy by electrons moving from lower potential to higher potential the loss of energy appears as heat
3ans.Experiment: To verify whether a half-covered convex lens can produce a complete image of the object.
Apparatus needed: A Convex lens, a candle, and two black sheets of paper.
Procedure:
1. Mount a convex lens on the table. Light a candle with a match stick and place it near one side of the lens on the table. Turn off the lights of the room in order to get dark.
2. Take the sheet of paper and place it on the other side of the lens as the candle.
3. Now focus the image formed on the sheet of paper by moving the sheet only.
4. Observe the image carefully.
5. Mark the positions of candle, lens and screen.
6. Now, turn off the light. Take the convex lens and cover half of it with the second sheet of black paper.
7. Mount the lens on the table in the original position and repeat the above experiment.
Observations:
A focused image of the object, or the candle, is obtained in both the experiments. However, the image formed with half of the convex lens covered is less bright as compared to when the lens is uncovered.
diagram in photo
2ans.Tropical Rainforest Ecosystems.
Taiga Ecosystem.
Temperate Forest Ecosystem.
Tundra Ecosystem.
4ans.The reason why the sun appears reddish in the early morning is because of the Scattering of light in the earth's atmosphere. The atmosphere of earth contains various gas molecules, like- Nitrogen, Oxygen, Carbon dioxide, etc. When the sunlight first reaches earth, it passes through these molecules
5ans.An example of a thermal decomposition reaction is the formation of lead oxide, nitrogen dioxide and oxygen on heating lead nitrate. This activity can be carried out using a test tube and Bunsen burner. Take a pinch of lead nitrate in the test tube and heat it over the flame from Bunsen burner
6ans. in photo
