Alarge helium filled balloon is used as the center piece for a graduation party. the balloon alone has a mass of 225 kg and it is filled with helium gas until its volume is 323 m3.
assume the density of air is 1.20 kg/m3 and the density of helium is 0.179 kg/m3.

(a) calculate the buoyant force (in n) acting on the balloon. (enter the magnitude. round your answer to at least three significant figures.)

(b) find the net force (in n) on the balloon and determine whether the balloon will rise or fall after it is released. magnitude n direction rise d

(c) what additional mass (in kg) can the balloon support in equilibrium? (if the balloon will fall after it is released, enter 0.)

Ineed extreme for task 2. my student number is 571721. many to whoever solves this correctly, im in debt to you.

In a thunderstorm, charge builds up on the water droplets or ice crystals in a cloud. thus, the charge can be considered to be distributed uniformly throughout the cloud. for the purposes of this problem, take the cloud to be a sphere of diameter 1.00 kilometer. the point of this problem is to estimate the maximum amount of charge that this cloud can contain, assuming that the charge builds up until the electric field at the surface of the cloud reaches the value at which the surrounding air breaks down. this breakdown means that the air becomes highly ionized, enabling it to conduct the charge from the cloud to the ground or another nearby cloud. the ionized air will then emit light due to the recombination of the electrons and atoms to form excited molecules that radiate light. in addition, the large current will heat up the air, resulting in its rapid expansion. these two phenomena account for the appearance of lightning and the sound of thunder. take the breakdown electric field of air to be eb=3.00ă—106n/c. part a estimate the total charge q on the cloud when the breakdown of the surrounding air is reached. express your answer numerically, to three significant figures, using ďµ0=8.85ă—10â’12c2/(nâ‹…m2) .

Much of the information taught in earth-space science would not be available if it weren’t for our remote sensing abilities. explain two ways our remote sensing strategies contribute to our knowledge of these topics.