- Which instrument is used to measure pressure?
- Saccharimeter
- Ammeter
- Manometer
- Lactometer
- What does Angstrom measure?
- Quantity of liquid
- Length of light waves
- Length of cables
- Speed of ships
- Light year is related to
- Energy
- Speed
- Distance
- Intensity
- Match the following columns
Column 1 Column 2 A. Relative 1. Pyrometer humidity B. Anemometer 2. High temperature C. Navigation 3. Hygrometer D. Direction of wind 4. Chronometer
1 2 3 4 a. B D A C b. D B A C c. A D B C d. C A D B - Which of the following instruments is used to measure pressure of gases?
- Barometer
- Manometer
- Ammeter
- None of these
- Joule is the unit of
- Temperature pressure
- Energy
- Heat
- How many Dynes are there in one gram weight?
- 900
- 375
- 981
- 250
- How many Ergs are these in 1 Joule?
- 102
- 104
- 106
- 107
- The unit of current is
- Ohm
- Watt
- Ampere
- None of these
- The unit of energy in MKS system is
- Volt
- Erg
- Ohm
- Joule
- The intensity of an earthquake is measured with a
- Barometer
- Hydrometer
- Polygraph
- Seismograph
- Centigrade & Fahrenheit scales give same reading at
- - 40°
- - 32°
- - 273°
- - 100°
- Match the following columns
Column 1 Column 2 A. Anemometer 1. To measure underwater depth using sound B. Aneroid barometer 2. To measure very small distances C. Micrometer 3. Find out wind speed D. Fathometer 4. Find out direction of wind 5. Measure atmospheric pressure
Class 09 Atoms and Molecules Numerical Problem based on Law of chemical Combination Law of conservation of mass Law of constant proportion Empirical formula 1. If 10 grams of CaCO 3 on heating gave 4.4g of CO 2 and 5.6g of CaO, show that these observations are in agreement with the law of conservation of mass.(Based on Law of conservation of mass) Solution: Mass of the reactants = 10g ; Mass of the products = 4.4 + 6.6g = 10g Since the mass of the reactants is equal to the mass of the products, the observations are in agreement with the law of conservation of mass. 2. 1.375 g of cupric oxide was reduced by heating and the weight of copper that remained was 1.098g. In another experiment 1.179 g of copper was dissolved in nitric acid and the resulting copper nitrate was converted into cupric oxide by ignition . The weight of cupric oxide formed was 1.476 g. which law of chemical combinations does this data state? Solution: in first experiment: Copper oxide = 1....

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