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Virtual Science Academy - Physics Short Questions Virtual Science Academy Physics Chapter 1 – Short Questions 1. Define science. 2. Define physical quantities with example. 3. Define non-physical quantities with example. 4. Does a physical quantity have units? 5. Write types of the physical quantity. 6. Define measurements. What are the parts of the measurements? 7. Define unit of a measurement with suitable example. 8. What is the role of SI unit in Science and Technology? 9. What is meant by System International unit? 10. Define base units and write its examples. 11. What are prefixes? Give example. 12. Write names of the prefixes which are commonly used. 13. Define scientific notation with example. Why do we use scientific notation? 14. Write down the rules while using prefixes and SI units. 15. Define metre rule. What is its least count? 16. What is measuring tape? What is its least count? ...

  O Level Physics - Chapter 1 Questions O Level Physics - Chapter 1: Motion, Forces and Energy 1.1 Physical Quantities and Measurement Techniques Define scalar and vector quantities with examples. What is meant by base quantities? List any four. Describe the use of vernier calipers and micrometer screw gauge. Explain how to measure the volume of an irregular object using a measuring cylinder. A student records a length as 7.45 cm. What is the precision of the measuring instrument? Describe how to reduce parallax error while reading a scale. What are systematic and random errors? Give examples. 1.2 Motion Define speed, velocity, and acceleration with their units. Differentiate between uniform and non-uniform motion. Draw and explain a velocity–time graph for constant acceleration. A cyclist moves 300 m in 30 s. What is his speed? A car accelerates...

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  Acids and Bases - Virtual Science Academy Virtual Science Academy Short Questions from Chemistry Chapter: Acids and Bases 1. What is an acid? Acids are classified as natural (organic) or mineral. Natural acids come from natural sources, while mineral acids are made from minerals. 2. What is an organic acid? Organic acids are acids obtained from natural sources like fruits and vegetables. 3. What is a mineral acid? Mineral acids are man-made acids prepared from minerals such as sodium chloride. 4. What is an alkali? An alkali is a base that dissolves in water. 5. What are the properties of a base? Bases have a bitter taste, feel slippery, and turn red litmus paper blue. 6. What is neutralization? Neutralization is a chemical reaction where an acid reacts...