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Yogita Ingle 6 years, 9 months ago
Perimeter of a rectangle is the total length (distance) of the boundary of a rectangle.
Perimeter of a rectangle = 2 (length + breadth)
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Yogita Ingle 6 years, 9 months ago
A reflex angle is the larger angle, it’s always more than 180° (half a circle) but less than 360° (A full circle). It’s possibly the most confusing of the angles because it’s always on the outside.
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Yogita Ingle 6 years, 9 months ago
Fast moving air towards a centre; usually with heavy rain; is known as cyclone. Wind direction, wind speed, humidity and temperature together create cyclone.
Hurricanes are enormous storms which come with rotating wind speed of 74 miles per hour. The rotating wind swirls across the warm water of the tropics and comes with terrifying force. This force blast ashore which causes destruction and even death. Hurricanes are known to be one of the nature’s most destructive storms as they bring heavy rains, deadly waves and fierce winds.
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Yogita Ingle 6 years, 9 months ago
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Physical Change |
Chemical Change |
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In a physical change, the molecules are rearranged while their actual composition remains same. |
In a chemical change, the molecular composition of a substance completely changes and a new substance is formed. |
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Some example of physical change are freezing of water, melting of wax, boiling of water, etc. |
A few examples of chemical change are digestion of food, burning of coal, rusting, etc. |
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Physical change is easily reversible i.e original substance can be recovered. |
Chemical change is irreversible i.e. original substance cannot be recovered. |
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In physical change, no new substance is formed. |
A chemical change is always accompanied by one or more new substance(s). |
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Ayush Kumar 6 years, 9 months ago
2Thank You