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Q. |
A vacuum cleaner works on the principle of pressure difference. On the moon it will – |
A. | work as efficiently as on the earth |
B. | not work at all |
C. | work with reduced efficiency |
D. | work with increased efficiency |
Answer» B. not work at all | |
Explanation: Vacuum cleaners work by creating a lower pressure just inside the opening which touches the floor. By creating a low pressure inside the machine, higher air pressure in the room pushes its way into the vacuum cleaner, taking the dirt with it. |
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