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प्रश्न
The following graph shows the change in temperature of a block of ice when heated. Use the graph to answer the following questions:
- For how many seconds did the ice block have no change in temperature?
- For how long was there a change in temperature?
- After how many seconds of heating did the temperature become constant at 0°C?
- What was the temperature after 25 seconds?
- What will be the temperature after 1.5 minutes? Justify your answer.
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उत्तर
- In the first 20 s, the ice block have no change in temperature.
- There was a change in temperature from 20 s to 50 s, i.e. 50 – 20 = 30 s.
- Observing the graph, we see that after 50 s of heating the temperature became constant.
- 20°C was the temperature after 25 s.
- Since, the temperature became constant at 100°C after 50 s heating, so the temperature will be 100°C even after 1.5 min.
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संबंधित प्रश्न
For an experiment in Botany, two different plants, plant A and plant B were grown under similar laboratory conditions. Their heights were measured at the end of each week for 3 weeks. The results are shown by the following graph.
- How high was Plant A after (i) 2 weeks (ii) 3 weeks?
- How high was Plant B after (i) 2 weeks (ii) 3 weeks?
- How much did Plant A grow during the 3rd week?
- How much did Plant B grow from the end of the 2nd week to the end of the 3rd week?
- During which week did Plant A grow most?
- During which week did Plant B grow least?
- Were the two plants of the same height during any week shown here? Specify.
The following table shows the number of patients discharged from a hospital with HIV diagnosis in different years:
| Years: | 2002 | 2003 | 2004 | 2005 | 2006 |
| Number of patients: | 150 | 170 | 195 | 225 | 230 |
Represent this information by a graph.
The following table shows the sales of a commodity during the years 2000 to 2006.
| Years: | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 |
| Sales (in lakhs of Rs): | 1.5 | 1.8 | 2.4 | 3.2 | 5.4 | 7.8 | 8.6 |
Draw a graph of this information.
Draw the temperature-time graph in each of the following cases:
| Time (in hours): | 7:00 | 9:00 | 11:00 | 13:00 | 15:00 | 17:00 | 19:00 | 21:00 |
| Temperature (°F) in: | 100 | 101 | 104 | 102 | 100 | 99 | 100 | 98 |
Draw the temperature-time graph in each of the following cases:
| Time (in hours): | 8:00 | 10:00 | 12:00 | 14:00 | 16:00 | 18:00 | 20:00 |
| Temperature (°F) in: | 100 | 101 | 104 | 103 | 99 | 98 | 100 |
Find out from the growth chart
- Between which days did the length of the plant change the most?
Find out from the growth chart
- Will the plant keep growing all the time? What will be its length on the 100th day? Make a guess!
A line graph can also be a whole unbroken line.
The following graph shows the number of people present at a certain shop at different times. Observe the graph and answer the following questions.
- What type of a graph is this?
- What information does the graph give?
- What is the busiest time of day at the shop?
- How many people enter the shop when it opens?
- About how many people are there in the shop at 1:30 pm?
