Answer:
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Explanation:
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Atmosphere - gas
sea and oceans - liquid and solid
land -liquid and solid
living things and plants - liquid
Explanation:
The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear. These bones are called the malleus, incus, and stapes.
Answer:
VR =
Explanation:
A machine is a device that can be used to overcome a load by the application of an effort through a pivot. Examples are: pulleys, wedge, screw jack, wheel and axle etc.
The wheel and axle is a simple device that can be used to lift a load through a height. Its velocity ratio (VR) can be determined by:
VR =
Note that for a practical wheel and axle, the radius of the wheel is greater than the radius of the axle.