Embibe Experts Solutions for Chapter: Winds, Storms and Cyclones, Exercise 1: Exercise

Admiral Beaufort, in $1805$, invented the Beaufort Scale which was useful in estimating wind speeds through observation objects. Originally, it was devised for use in oceans, but later it was adapted for use on land as well. Parts of the Beaufort Wind Scale, which is a numerical scale for wind speed, are given.

Heavy rains and strong winds lashed the coast of Tamil Nadu yesterday causing widespread damage in their wake. Winds reaching a speed of up to $100 \mathrm{kmph}$ were reported. Trees were uprooted at a number of places inhibiting traffic movement. Which weather map symbol corresponds to the above description?

Sumith is filling a number of small bottles with juice quickly and with no spillage. Which of these arrangements should he use?

Cooling due to radiation occurs when the heat absorbed by the Earth during the day is radiated into space in the evening. Under which of these evening conditions would cooling due to radiation be maximum?

Four students are conducting an experiment. They each have a glass bottle which are kept in four vessels as shown in the figure.

They fix a balloon on the mouth of each of the glass bottles. The balloon will inflate in which of the following options?

Riya fills a bottle with warm water. She then empties it and tightly closes the bottle using its cap. Immeadiately cold water was poured on the closed bottle. she notices that the shape of the bottle gets distorted.

Explain how the bottle got distorted?

Adit and friends were playing with baloons. They had two baloons which were hanged from a rope. When a fan was blowing in the space between the baloons, they observed that the baloons are moving closer. Give reason for this observation.

During a birthday party, Shyam noticed that the baloons near the heater of the room were bursting. Meanwhile, the baloons away from the heater were fine. All the baloons were from the same packet. Give reason for this observation.

Shyam has a closed container filled with air which is at $20 °\mathrm{C}$. He inserts some air which is at $45°\mathrm{C}$ to the center of the container. What changes can be observed after the addition of hot air?