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How soap acts towards fat Prepare another jar with warm water and oil just as you did in the experiment above. This time add about half a cup of either liquid soap or strong so
What a molecule is, and the difference between molecules and compounds? A molecule is made up of two or more atoms combined chemically. The atoms can be of the same element, as
Eight students conducted a controlled experiment to demonstrate how walking and running affected their heart rates. Use the data below to answer the following questions. Effects of
How to calculate the student t test step by step when the mean of heart rate at 1 minute is 5.0,17.2,22.9,8.3,10,76.5,70,19.7 and for breathing rate it is 22.2,28.5,20,12.5,20,92,
Let us summarise the important points that we have understood about the radiation and chemical hazards in this unit. The radiations, causing severe hazards like cancers, mutations,
Why do organisms need water? Organisms need water for the following reasons: (i) All cellular processes need water as a medium. Usually, the reactions that take place in our
What is osmosis? What are Isotonic, Hyperonic and Hypotonic Sloutions? What are the pracautions for the experiment of osmosis?
Burns : There are two types of burns which we are to discuss: 1) Chemical 2) Thermal Chemical burns have already been discussed in Sec. 16.7; so we shall discuss thermal
RADIATION HAZARDS : We are sure that you would have studied about electromagnetic radiation during your studies at the school. You would recall that in electromagnetic radiatio
what are good conductors of heat?why is advantages to have ventilators in houses at the top of walls?
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