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प्रश्न
Define the light year.
एका वाक्यात उत्तर
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उत्तर
A light year is defined as the distance travelled by light in a vacuum in one year.
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Measurements
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संबंधित प्रश्न
Name two units of length which are bigger than a metre. How are they related of the metre?
Name the physical quantities which are measured in the given units:-
ns
Fill in the blank:
The unit is which we measure the quantity is called ________.
State the factors which determine the number of significant figures for the calculation of the final result of an experiment.
Name a device used to measure the short intervals of time.
What is the principle of a physical balance?
What is meant by measurement?
Match the following:
| 1. | Length | 1. | ampere (A) |
| 2. | time | 2. | Kelvin (K) |
| 3. | Mass | 3. | meter (M) |
| 4. | Temperature | 4. | second (S) |
| 5. | Electric current | 5. | kilogram (K) |
Define measurement.
Questions based on Higher Order Thinking Skills:
|
There are three spheres A, B, C as shown below. Sphere A and B are made of same material. Sphere C is made of a different material. Spheres A and C have equal radii. The radius of sphere B is half that of A. Density of A is double that of C.
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Now answer the following questions.
- Find the ratio of masses of spheres A and B.
- Find the ratio of volumes of spheres A and B.
- Find the ratio of masses of spheres A and C.
