This is somewhat confusing, but I'd have to go with A. Since Newton's Third Law states that every action has an equal but opposite reaction.
Bacteria have a well-earned reputation for causing disease, but now certain types of microorganisms are being put to good use by improving water cleanliness and safety. Waste water produced by factories is contaminated with heavy metals—elements that are naturally present in our bodies in small amounts, but which can be extremely dangerous to humans at higher levels of concentration. To clean this industrial waste water, it is put through the process of bioremediation, or the use of microorganisms to treat water that has been contaminated by hazardous materials. Water that has been cleaned by this method can then be released into the environment or even reused. One method of bioremediation is called biogenic hydrogen sulfide precipitation technology
What are the following options or choices for this question?
Answer:
They will run parallel to each other as the none of a straight pole cannot be bent in such a way where one side can turn without the other turning.
Answer:
the normal force on the rock acts perpendicular to the bowl's surface.
Explanation:
As we know that Normal force is the reaction force of two contact surfaces which always act perpendicular to the contact surfaces
Here we know that the rock is moving inside the bowl
So Normal force on the rock must perpendicular to the surface of the bowl which always passes through the center of the bowl.
Since the rock is moving in vertical plane so it must have two acceleration
1) Tangential acceleration which will increase the magnitude of the speed along the tangential path
2) Centripetal acceleration which will change the direction of the rock
So here only correct option will be
the normal force on the rock acts perpendicular to the bowl's surface.