Density =mass/volume
volume=mass/density
volume=1.51g/ 3.52g/ml
volume=4.29ml
Answer:

Explanation:
<u>Given:</u>
= uniform electric field in the space = 
- Q = Charge placed in the region =

<u>Assume:</u>
= Electric force on the charge due to electric field
We know that the electric field is the electric force applied on a unit positive charge i.e.,

This means the electric force applied on this additional charge placed in the field is given by:

From the above expression of force, we have the following y-component of force on this additional charge.

Hence, the y-component of the electric force on the this charge is
.
<span>Net charge of the object = 0.500 ÎĽc
The charge of electron = -1.602 x 10^-19 C
Calculating the net change in the number of electrons = 0.5 x 10^-6 / -1.602 x 10^-19 = - 3.12 x 10^12
The negative sign implies the number of electrons that needs to be removed that is 3.12 x 10^12</span>
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