brandiewilliams12567
09.04.2021 •
Physics
1.
Differentiate virtual image and real image ?
2.
All the chemical equations must be balanced. Why ? Guess and write.
Bee sting leaves a chemical substance that causes pain and irritation.
Name the chemical substance. How can we get relief from it?
4.
5.
What are the precautions to be taken while diluting strong acid ?
Focal length of the concave mirror is 8 cm. The object is placed at
16 cm infront of the mirror. Write the position of image and its nature.
[Turn Over
e of curvature. See figure-19.
Jig-19
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Ответ:
1.virtual image cannot be formed on screen but real image can be formed on screen. virtual image is always errect whereas real image is always inverted.
2. according to the law of conversation of mass when a chemical reaction occurs the mass of products and reactants must be equal.the amount of atoms in each element doesn't change in the chemical reaction.
e. Methanoic acid HCOOH. we can use baking soda to get rid from it .
Ответ:
COPY RIGHT A STOP STOP