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Yogita Ingle 6 years, 2 months ago
When warm air rises, it expands and cools. Cool air can't hold as much water vapor as warm air, so some of the vapor condenses onto tiny pieces of dust that are floating in the air and forms a tiny droplet around each dust particle. When billions of these droplets come together they become a visible cloud.
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Yogita Ingle 6 years, 2 months ago
Sludge refers to the residual, semi-solid material left from industrial wastewater, or sewage treatment processes. It can also refer to the settled suspension obtained from conventional drinking water treatment,and numerous other industrial processes.
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Yogita Ingle 6 years, 2 months ago
Milk overflows when boiled for the first time because it contains entrapped air. The air expands on heating and tends to escape lifting the surface of milk.Once all the air is expelled, the boiling would be regular and smooth. A second boiling would not lead to overflow.
Swayam Sisodia 6 years, 2 months ago
Posted by Niraly Sutar 6 years, 2 months ago
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Yogita Ingle 6 years, 2 months ago
Measurement: Comparing an unknown quantity with some known quantity is called measurement.
Result of Measurement: The result of measurement has two parts; one part is the number and another part is the unit. The known quantity which is used in measurement is called a unit. For example; when you say that your height is 150 cm then the measurement of your height is being expressed in a number, i.e. 150 and a unit, i.e. centimeter.
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Kanika Panwar 6 years, 2 months ago
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All foods contain one or a combination of the 6 nutrients. If you eat a balanced diet consisting of a variety of healthy foods, you are certain to receive these nutrients every day.
Food has 3 main functions in the body:
- Growth and Development
- Provision of Energy
- Repair and maintenance of the body's
Posted by Kaur Amrit 6 years, 2 months ago
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Yogita Ingle 6 years, 2 months ago
Materials which allow electric current to pass through them are called conductors of electricity. Examples are iron nail, key, safety pin, water, human body etc.
Conductors are mainly metallic
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Gaurav Seth 6 years, 2 months ago
Acclimatization: The changes which happen in the body of a single organism over a short duration; due to sudden changes in its surroundings is called acclimatization. For example; when a person (who lives in the plains) goes to a mountain, he may experience difficulty in breathing initially. Within a couple of days, he would begin to breathe normally because his body learns to make adjustments. This is an example of acclimatization.
Posted by Prachi Pumnani 6 years, 2 months ago
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Yogita Ingle 6 years, 2 months ago
Periodic motion, in physics, motion repeated in equal intervals of time. Periodic motion is performed, for example, by a rocking chair, a bouncing ball, a vibrating tuning fork, a swing in motion, the Earth in its orbit around the Sun, and a water wave.
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Viraj Aggarwal 6 years, 2 months ago
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Yogita Ingle 6 years, 2 months ago
The changes in the environment (external or internal) to which the organism respond and react are called stimuli. It is a thing that incites to action or exertion or quickens action, feeling, thought, etc.
Posted by Shikha Chaudhary 6 years, 2 months ago
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Yogita Ingle 6 years, 2 months ago
Lactometer is a small glass instrument that is used to test the purity of the milk. It works on the principle of specific gravity of milk (Archimede's Principle). It measures the relative density of milk with respect to water. If the specific gravity of a sample of milk is within the approved ranges, the milk is pure.
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Yogita Ingle 6 years, 2 months ago
- Sometimes, because of excessive rain, rivers and canals begin overflowing and the adjoining lands start submerging. This condition is called flood. It cause epidemics and serious loss to life and property.
- Water in a vaporous form especially when below boiling temperature and diffused
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- When salt is mixed with water (seawater), the water is heated until all the water becomes vapor and only the salt is left behind.
- This process of conversion of a liquid into its vapor is called Evaporation
- This is how salt is separated from seawater.
Posted by Sd Official 6 years, 2 months ago
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Yogita Ingle 6 years, 2 months ago
The rate of evaporation is affected by the following factors:
i. Temperature: The rate of evaporation increases with an increase in temperature.
ii. Surface area: The rate of evaporation increases with an increase in surface area.
iii. Humidity: The amount of water vapour present in the air is called humidity.
Posted by Gupta Sakshi Gupta 6 years, 2 months ago
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Samey Kothavade 6 years, 2 months ago
1Thank You