E Doris James, Vandana Tirath, Anton Siromani and, Kiran Banerji Solutions for Chapter: Yearly Examination, Exercise 1: (Lessons 1-19)

Joseph was heating milk in a stainless steel vessel and a copper bottom vessel. In which vessel is the milk likely to boil faster and why?

You are at home one evening when a thunderstorm strikes. List three things you should do to keep yourself safe during the storm.

Describe how the southwest monsoon of India is formed.

Raghu wants to display magnified images of specimens on a screen using a convex lens. Describe with a simple diagram where he should place the specimens. Mention one drawback of this method.

A pendulum bob of mass $10 \mathrm{g}$ is displaced by $10 \mathrm{cm}$ and made to oscillate. The bob is then displaced by $15 \mathrm{cm}$. Will the time period of the pendulum change? Why, or why not?

Kunal takes $1500$ steps from his home to the playground. He reached the playground in $10 \mathrm{minutes}$. He moves $50 \mathrm{cm}$with each step. His average speed is:

Why does an electric current pass through a wire deflect the needle of a compass placed under it? How can the direction of deflection of the needle be reversed?

An object is placed between F and O of a convex lens. Which of these is not a characteristic of the image formed?