Suppose that a party balloon is spherical, has a radius of 16 centimetres and is filled with helium. furthermore suppose that we do our experiment under standard atmospheric conditions, when the air density is . how many of these balloons should a 75 kilogram human carry in order to become airborne?

Let N number of balloons are used to pull the person upwards

So there would be buoyancy force due to air on balloons which will be counterbalanced by the weight of a person.

Volume of one balloon is given by

here radius R = 16 cm

V = 0.0172 m^3

Now the buoyancy force of air on each balloon is given by

Now weight of the person that we have to counter balance

Now by force balance

So we require 3639 balloons to hold the person of mass 75 Kg

i dont think you are wrong for wanting to get even with someone who did you wrong.

(i'm an eye for an eye kind of person) but if this person hurt you in a sexual way, i dont suggest doing anything to him. he should be taken to the proper authorities, you could go to jail depending on what you do. if it was something small like your sibling took your spot on the couch, than yea, i would get even with him by taking one of his favorite snacks lol. but i dont suggest you doing anything illegal.

where is the circuit diagram ?