The physical changes are you are breaking down the food u eat and the chemical changes are when the enzymes in your stomach break down the food that you have already eaten
The answer is C. Natural gas because both A and B are their own forms of energy.
The body will take 20 seconds to cover a distance of 1000 m i.e. 1 km
The Correct Answer is A.
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The answer is : B. The compass will spin exactly 360 Degrees
Compass will point out to the earth's magnetic field. If we change the direction of the current , we created an effect which make the compass detect the magnetic field in the exact opposite direction, that is why it will flip exactly 180 degrees