It is use by Eye Care Professionals To check the eyesight of a person.
If u would have visited a eye care centre u would have noticed a chart like this--
If a person can see all the letters from a distance his eyesight is Perfect.If that person misses a letter or a line from the grid eye treatment or spectacles are given to the person for improving their eyesight
Answer: starting a program that promises getting getting fit by exercising five minutes a day.
Explanation: i took the test and got it right.
Answer:
m = 20 kg
Explanation:
Given that,
Force, F = 40 N
Acceleration of the object, a = 2 m/s²
We need to find the mass of the object. Let the mass be m.
We know that,
Net force, F = ma
So,

So, the mass of an object is equal to 20 kg.