Well I know two million are replaced each second I think I'm in fifth grade so ok this stuff lol
The most accurate answer among the choices would be the fourth one, because if the weight of the air displaced is greater than the balloon's weight, the balloon will float upwards. Density of the air also plays a part. Hot air = less dense. Hope my answer has come to your help.
Answer:
The reflected resistance in the primary winding is 6250 Ω
Explanation:
Given;
number of turns in the primary winding,
= 50 turns
number of turns in the secondary winding,
= 10 turns
the secondary load resistance,
= 250 Ω
Determine the turns ratio;

Now, determine the reflected resistance in the primary winding;

Therefore, the reflected resistance in the primary winding is 6250 Ω
The charge of one electron is 1.6 x 10⁻¹⁹ C
Number of electrons = (50 x 10⁻⁶) / 1.6 x 10⁻¹⁹
= 3.125 x 10¹⁴ electrons