Give reasons for the following statements.
1. Penguins can easily live in the polar regions. (2)
2. The winds flow from the sea towards the land in summer. (2)
3. Place a crumpled piece of paper on the mouth of an empty bottle and it comes outside
when you blow air inside the bottle.
Answers
Penguins are not arctic animals, but rather live at the South Pole, or Antarctic, and in surrounding areas. There are many types of penguins, some of which even migrate short distances to different breeding or feeding grounds, but for the most part they confine themselves to the southernmost latitudes of the world.
The air over the land gets heated and rises creating a low pressure area. The cooler air from over the oceans(being at higher pressure), rushes towards the land. This causes the wind to blow from the oceans towards the land. The winds blowing from the oceans towards the land in summer are called monsoon winds.
Hold the empty bottle on its side and place the paper ball just inside its mouth. ... When we blow into the mouth of the bottle, the air near the mouth has higher speed. This decreases the pressure there. The air pressure inside the bottle is higher than near the mouth.
Answer:
The bottom of the flask is circular with radius 10 cm. If the atmospheric pressure is 1.013xx10^(5) Pa, find the force exerted by the water on the bottom . Take g=10 "ms"^(-2) and density of water =1000 "kgm"^(-3). Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams