G. Long answer type questions.
1.What are the precautions that are needed to be taken while measuring the length
of a wooden block using a metre scale?
2. Write a short note on beam balance.
3. Explain how the department of weights and measures, Government of India, is
helping people so that they would not get cheated by the shopkeepers.
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Answer:
- The beam balance is a device used for the determination of the mass of a body under gravitation. It consists of a beam supported at the centre by an agate knife edge resting on a support moving inside a vertical pillar. The beam carries a light pointer which moves over a scale.
- State the precautions which should be taken while using a metre scale to measure the length of an object.
- Keep the ruler exactly along the length to be measured.
- Avoid using worn out portions of the ruler.
- Keep the eye vertically above the point where the measurement is to be taken.
- When a consumer buys a product he assumes he is receiving the correct quantity for the price he has paid. This law protects consumers in this way by stating that anyone who sells goods must supply the amount that he has claimed to have sold. This amount must correspond to the price he has named.
Explanation:
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