Question

Q5. Why are bells made of metals?
Q6. What are different mode of transfer of microorganism? How does influenza spread?
Q7. Calculate the pressure exerted by a force of 100 N on 3 sq. m area.
Q8 what is vaccine?
Q9. Write chemical properties of metal and nonmetals.
010.what is corrosion? Describe the different preventive methods for corrosion​

Answer 1

Answer:

bells are made up of metals because metals are very highly sonorous

Answer 2

1.metals used for bells to make a nice ringing sound

2.mode of transmission are contact(direct/indirect), droplet ,airborne, vector , common vechicle etc.

3.300pa

4.a substance used to istimulate the production of antibodies and provide immunity .

5.it is too long (search it on google)

6.damage caused to metals stone or other material .

painting etc