Answer:
I can't understand the language....
Answer:
100 micro-ampere
Explanation:
The sensitivity of an ammeter is the current required for the ammeter to reach its maximum reading or to cause maximum deflection of the ammeter.
As the relative amount of current required to cause maximum deflection of an ammeter is lesser, the sensitivity of the ammeter is said to be higher or the ammeter is said to be more sensitive
Therefore, given that the maximum reading on the given microammeter is 100 μA, the current required to cause the maximum deflection an thus the sensitivity of the ammeter is 100 micro-ampere.
You just said that the object is "floating".
(As soon as you said that, a picture of a duck flashed through my mind. But then I knew right away that the duck could not be an accurate representation of the situation you're describing. 340 N would be <u><em>some duck</em></u> ... about 76 pounds ... and that duck would have been caught and eaten a long time ago. I mean ... what could a 76-pound duck do ? Could it fly away ? Could it run away ? ? Not likely.)
So it's not a duck, but whatever it is, it's just sitting there on the water, floating. What's important is that it's <u><em>not accelerating</em></u> up or down. THAT tells us that the vertical forces on it are balanced so that there's NO NET vertical force on it at all.
What are the vertical forces on it ? There's gravity, pulling it DOWN with a force of 340 N, and there's buoyancy, pushing it UP. The SUM of those two forces must be <em>zero</em> ... otherwise the object would be accelerating up or down.
It's not. So (gravity) + (buoyancy) must add up to zero.
The buoyant force on the object is <em>340 N UPward.</em>