As per Definition of acceleration we know that rate of change in velocity of object is known as acceleration
so when we apply push on an object that push or applied force will change the velocity of object always
so correct answer must be
a.) changed the velocity
Answer:
is the no. of electrons
Explanation:
Given:
<u>No. of electrons in the given amount of charge:</u>
As we have charge on one electron
so,
is the no. of electrons
Then we require molecules.
<u>Now the no. of moles in this many molecules:</u>
where
Avogadro No.
<u>So, the mass of water in the obtained moles:</u>
where:
m = mass in gram
Answer:
The focal length of the appropriate corrective lens is 35.71 cm.
The power of the appropriate corrective lens is 0.028 D.
Explanation:
The expression for the lens formula is as follows;
Here, f is the focal length, u is the object distance and v is the image distance.
It is given in the problem that the given lens is corrective lens. Then, it will form an upright and virtual image at the near point of person's eye. The near point of a person's eye is 71.4 cm. To see objects clearly at a distance of 24.0 cm, the corrective lens is used.
Put v= -71.4 cm and u= 24.0 cm in the above expression.
f= 35.71 cm
Therefore, the focal length of the corrective lens is 35.71 cm.
The expression for the power of the lens is as follows;
Here, p is the power of the lens.
Put f= 35.71 cm.
p=0.028 D
Therefore, the power of the corrective lens is 0.028 D.