Science, asked by chauhanrupam999, 5 months ago

class 9 science
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Answered by deepkarawat1903
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11. power is the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the watt, equal to one joule per second. In older works, power is sometimes called activity. Power is a scalar quantity.एक वाट को परिभाषित करने और किलोवाट घंटा और जौल के बीच संबंधों को खोजने के

If you lift a can of soda to your mouth in one second, then you are exerting one Joule per second, also known as one Watt, of power. ... One kilowatt-hour is equivalent to the energy of 1,000 joules used for 3,600 seconds or 3.6 million Joules. In equation form: 1 kWh = 3.6 million J.

12. The immune system has a vital role: It protects your body from harmful substances, germs and cell changes that could make you ill. It is made up of various organs, cells and proteins. As long as your immune system is running smoothly, you don't notice that it's there.

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