D.
Answer in detail.
1. Describe the stepwise method to find the area of a leaf using a graph paper.
2. Describe two devices to measure the volume of an object.
3. How will you measure the volume of a stone?
4. The mass of an iron rod is 52 g. The density of iron is 7.8 g cm-3. Find the volume of the rod.
5. Describe the method in steps to find the density of a pebble.
6. A car covers 80 km in 2 hours and a bus covers 100 km in 5 hours. Which of the two travels faster?
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1. Method to find the area of an irregular lamina using a graph paper: First , place the lamina over a graph paper and draw its boundary line on the graph paper with a pencil. Then remove the lamina and count and note the number of complete squares as well as the number of squares more than half within the boundary line
(check the first attachment for graph)
2.Measuring jar, scale, vernier calipers are used to measure the volume of an object. If the object is irregular, measuring jar is used and volume is measured by displacement method.If the object is regular its dimensions are measured using either scale or vernier calipers and volume is calculated.
3.Stone volume can be estimated using an ellipsoid formula, as recommended by the European Association of Urology
4. Mass × Volume = Density
52×v = 7.8
V= 7.8/52 = 0.15ml
5. The Density of the pebble is mass divided by volume. To find the volume of the pebble place a certain amount of water in graduated cylinder without anything in it . Record the volume of that .. Then place the pebble inside the cylinder and record the volume of that.
6.Car travels faster than bus.
If car travel 80km in 2 hours then it will cover 40km in 1 hour and If bus travel 100km in 5 hours then it will cover 20 km in 1 hour.
That's why, car travel faster than bus.
Explanation:
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