Question
Question 17:
While doing an experiment on plotting the temperature-time graph of hot water as it cools, we can get a good graph :
(1) only by noting the temperature of hot water every 30 seconds throughout
(2) only by noting the temperature of hot water every 1 minute throughout
(3) by noting the temperature of hot water every 1 minute to start with and every 2 minutes later on
(4) by noting the temperature of hot water every 2 minutes to start with and every 1 minutes later on
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Text solutionVerified
Answer:
When hot water cools down, Initially its temperature falls at a higher rate but later the rate of fall of temperature decreases. So, in starting the temperature will fall faster but after sometime, it will fall a little slower. Hence, to plot a temperature-time graph for cooling of hot water, we have to note the temperature of hot water every 1 minute to start with and every 2 minutes later on.
Hence, the correct answer is option 4.
Hence, the correct answer is option 4.
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Question Text | Question 17:
While doing an experiment on plotting the temperature-time graph of hot water as it cools, we can get a good graph : (1) only by noting the temperature of hot water every 30 seconds throughout (2) only by noting the temperature of hot water every 1 minute throughout (3) by noting the temperature of hot water every 1 minute to start with and every 2 minutes later on (4) by noting the temperature of hot water every 2 minutes to start with and every 1 minutes later on |
Topic | Work and Energy |
Subject | Science |
Class | Class 9 |
Answer Type | Text solution:1 |
Upvotes | 18 |