How can you prevent the spread of communicable diseases?

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Handle & Prepare Food Safely. ...Wash Hands Often. ...Clean & Disinfect Commonly Used Surfaces. ...Cough & Sneeze Into Your Sleeve. ...Don't Share Personal Items. ...Get Vaccinated. ...Avoid Touching Wild Animals.
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Which has more number of atoms, 100 grams of sodium or 100 grams of iron (given, atomic mass of Na = 23 u, Fe = 56 u)?
100 gm of sodium will have (Given mass / molar mass )x Avogadro's Number = (100/23) x 6.022 x 10^23 = 2.62 x 10^24 atoms 100 gms of Iron will have (100/56) x 6.022 x 10^23 = 1.07 x 10^24 atoms So 100 gms of Sodium will have more atoms.
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Nasar
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Define the atomic mass unit.
An atomic mass unit is defined as 1/12th of mass of an atom of carbon-12. This is approximately 1.67 ×10^-27 kilograms.
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Santosh
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What will happen if yeast powder is put in sugar solution and kept for few hours? Name the process.
When yeast powder is put in sugar solution and kept for few hours, fermentation takes place. The sugar is converted into alcohol by yeast and this process is known as Fermentation.
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Rohit
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If a man jumps out from a boat, the boat moves backwards. Why?
By the Newton third law of motion. In order to jump forward.... He pushed boat backward.
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J.k.kavyadharshini
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Name the technique to separate salt from sea-water.
Open-air evaporation on seashores forms concentrated brine which continues to form a supersaturated solution finally precipitation takes place, and salt get separated.
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