Question

Pls solve 1,2and3 I will mark as brainliest
(Pls also give full reason)

Answer 1

1 ka 3 or 2nd ka 4 or 3rd 2 h bhai

thx for asking and i will always ready to help you

Answer 2

1.chromium as it does not corrode easily.

2.it completes 0.75 oscillation in 3s.

so it will complete 1 oscillation in 4s

so,it will complete 3.5 oscillation in 14s.so your ans. is (a).

if u have any doubt plz ask me.

hope this helps u.

as soon as i will get the ans. of 3rd qus i will tell u.