Meter is the unit of length and second is the unit of time. unit of length (m): A metre was originally defined in 1889 as the distance between two marks drawn on a platinum-iridium (an alloy made of 90% platinum and 10% iridium) rod kept at 0°C in the International Bureau of Weights and Measures at serves near Paris. unit of mass is gram (symbol g) and of volume is cubic centimetre (symbol cm3). The weight of body changes with acceleration due to gravity. Car travels faster than scooter. A car travels with a speed 12 m s”1, while a scooter travels with a speed 36 km h-1. Answer: Question 9. Title: Physical Quantities & Measurement. Unit of speed shows that speed is a derived quantity and it is derived from length and time. Answer. 1. For more content related to this post you can click on labels link. (b) A measuring beaker of capacity 200 ml can measure only the volume.
1.16. below. Find the mass of block. Answer: Question 7. (i) Distance travelled d = speed v × time t. (b) A metallic piece displaces water of volume 15 ml. (a) The S.I. The volume of piece is : (c) A piece of paper of dimensions 1.5 m x 20 cm has area : (e) The density of alcohol is 0.8 g cm-3. Question 16. Answer. Find the mass of cork. Answer: The S.I. How long a train will take to travel a distance of 200 km with a speed of 60 km h-1 ? velocity = distance / time = m/s . Answer. The S.I. Question 1. unit of density is g/cm3 or g cm-3. The density of liquids and gases decreases or increases with the rise or fall in temperature. and C.G.S. unit of speed. Answer: Length of a rectangular field = 60 m Breadth of rectangular field = 35 m ∴ Area = 60 m × 35 m = 2100 m2. A cork has a volume 25 cm3. MCQs with answers are also given in Chapter 1 Physical Quantities and Measurements notes. Question 10. True. Answer: The S.I.
When you can measure what you are speaking about and express it in numbers, you know something about it. Answer: To measure the volume of a piece of stone. Physics Notes for Class 9th Chapter 1.
... 1 mg c) 1000 mg d) 10 mg. 14. A solid silver piece is immersed in water contained in a measuring cylinder. Find the volume of silver piece. = 10 dm × 10 dm × 10 dm = 1000 dm = 103 dm Note 1 m = 10 dm.
(e) The S.I. Answer. You are required to take out 200 ml of milk from a bucket full of milk. Answer: Question 14. We see that the level of water rises. The weight of a body is the force with which every body is attracted towards its centre. The cycle of upward and downward movements of the fluid form currents in the medium which are known as convectional currents. The S.I. State two smaller units of volume. Definitions of three fundamental quantities: S.I. How can you determine the volume of an irregular solid (say a piece of brass) ? Calculate the capacity of the water tank in (a) m3 (b) litre. Answer. Question 2. This is the post on the topic of the 9th Class Physics Chapter 1 Notes - MCQs, Questions and Numericals pdf. Physics 9 Chapter 1 - Physical Quantities and Measurements - 18. Find the volume of a liquid present in a dish of dimensions 10 cm x 10 cm x 5 cm. Answer: Question 11. One cubic metre is the volume of a cube of each side 1 metre as shown in figure below i.e., 1 m3 = 1 m × 1 m × 1 m. Question 3. One cubic centimetre is the volume of a cube of each side 1 centimetre, i.e., 1 cm3 = 1 cm × 1 cm × 1 cm. A car travels a distance of 15 km in 20 minute. Selina Publishers Concise Physics for Class 7 ICSE Solutions all questions are solved and explained by expert teachers as per ICSE board guidelines. unit of density is g cm-3. The first chapter of 9th Class Physics is “Physical Quantities and Measurement”. Question 5. Please Provide following information to Register, How can i download these lectures. The mass of an iron ball is 312 g. The density of iron is 7.8 g cm-3. (b) The density of water is maximum at 4°C. Question 15. (h) 36 km h-1 = 10 ms-1. Name two devices which are used to measure the volume of an object.