Answer:
Water can spread germs through bacteria.
Explanation:
Bacteria can live in water and can spread to new locations when water is moved.
The distance of the object from the lens is 3.12 cm.
<h3>What is magnification?</h3>
Magnification is the process of of enlarging an apparent size of an object.
<h3>Object distance</h3>
The object distance is calculated using the following lens formula;

where;
- M is the magnification
- V is the image distance
- U is object distance

Thus, the distance of the object from the lens is 3.12 cm.
Learn more about object distance here: brainly.com/question/24894435
Frequency=f
T=period of motion
f=1/T therefore f=1/2=0.500Hz or 0.5Hz
Hope this helps. Any questions please just ask. Thank you.