When using a light microscope, if you want the field of view to be larger, you would use

The correct answer will be- low power objective lens.

Explanation:

In a light microscope, two types of lenses are used:

1. Ocular lens- the lens near to the eye of a viewer

2. Objective lens- The lens near the object.

Since the field of view decreases with increasing the objective power of the lens, therefore one wants to observe the large field of view than one should use low power of objective lens that is 4x.  

Thus, the low power objective lens is the correct answer.

there is none because earth is stationary and flat.

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.