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Questions and Answers
What is the purpose of marking the position of the tip of the shadow of the gnomon on the sundial throughout the day?
What is the purpose of marking the position of the tip of the shadow of the gnomon on the sundial throughout the day?
- To track the movement of the sun (correct)
- To measure rainfall
- To observe the phases of the moon
- To determine the temperature variations
Why should the gnomon always be placed in the North-South direction on a sundial?
Why should the gnomon always be placed in the North-South direction on a sundial?
- To observe cloud formations
- To ensure accurate time measurement (correct)
- To study plant growth
- To track animal migration
In constructing a sundial, why is it important to connect each shadow point with the centre of the base of the gnomon?
In constructing a sundial, why is it important to connect each shadow point with the centre of the base of the gnomon?
- To show seasonal changes
- To form a decorative pattern
- To indicate the hours (correct)
- To create a symmetrical design
What is the primary function of a sundial?
What is the primary function of a sundial?
How can a sundial be used to tell time at different parts of the day?
How can a sundial be used to tell time at different parts of the day?
What is one key element in using a sundial to track time effectively?
What is one key element in using a sundial to track time effectively?
What is the total distance covered by a car that moves at 40 km/h for 15 minutes and then at 60 km/h for the next 15 minutes?
What is the total distance covered by a car that moves at 40 km/h for 15 minutes and then at 60 km/h for the next 15 minutes?
If two photographs taken at an interval of 10 seconds show a distance of 100 meters as 1 cm, what is the speed of the fastest car?
If two photographs taken at an interval of 10 seconds show a distance of 100 meters as 1 cm, what is the speed of the fastest car?
Based on the distance-time graph in Fig. 9.15, which vehicle is moving faster?
Based on the distance-time graph in Fig. 9.15, which vehicle is moving faster?
Which distance-time graph represents a truck that is not moving at a constant speed?
Which distance-time graph represents a truck that is not moving at a constant speed?
What is the purpose of fixing a gnomon vertically along a diameter on a circular board when constructing a sundial?
What is the purpose of fixing a gnomon vertically along a diameter on a circular board when constructing a sundial?
After constructing a sundial, why should you mark a line on the ground along the North-South direction?
After constructing a sundial, why should you mark a line on the ground along the North-South direction?
How do clocks and watches measure time?
How do clocks and watches measure time?
What is the time period of a pendulum?
What is the time period of a pendulum?
How did our ancestors tell time by looking at shadows?
How did our ancestors tell time by looking at shadows?
What is necessary for constructing a sundial?
What is necessary for constructing a sundial?
How can a sundial be used to track time?
How can a sundial be used to track time?
Why is measuring distances important in determining speed?
Why is measuring distances important in determining speed?
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