Physics, 21.04.2020 04:40 alex12everett

It has been proposed that we could explore Mars using inflated balloons to hover just above the surface. The buoyancy of the atmosphere would keep the balloon aloft. The density of the Martian atmosphere is 0.0154kgm30.0154kgm3(although this varies with temperature). Suppose we construct these balloons of a thin but tough plastic having a density such that each square meter has a mass of 5.00 g. We inflate them with a very light gas whose mass we can ignore.
(a) What should be the radius and mass of these balloons so they just hover above the surface of Mars?
(b) If we released one of the balloons from part (a) on earth, where the atmospheric density is 1.20kgm31.20kgm 3, what would be its initial acceleration assuming it was the same size as on Mars? Would it go up or down?
(c) If on Mars these balloons have five times the radius found in part (a), how heavy an instrument package could they carry?
(d) Would it go up or down?
(e) If on Mars these balloons have five times the radius found in part A, how heavy an instrument package could they carry?

Answers: 3

Show answers

Another question on Physics

Physics, 22.06.2019 05:50

High schoolphysics 5+3 pts a neon light consists of a glass tube with metal wires at each end. when connected to a high-voltage source, the gas glows. if a fly lands on the glass tube, what will most likely happen? a) the fly will not feel a shock because the glass conducts any free electrons back into the gas. b) electrons will flow directly from the metal wires along the glass and shock the fly. c) the fly will not feel a shock because the glass insulates it from the electrons in the gas and the metal. d) electrons that are moving through the gas will be conducted through the glass and shock the fly.

Answers: 3

Answer

Physics, 22.06.2019 16:00

In which of the following is positive work done by a person on a suitcase

Answers: 1

Answer

Physics, 22.06.2019 21:20

16. a brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 n on him. the mass of the losing player plus equipment is 90.0 kg, and he is accelerating at 1.20m/s2 size 12{1 "." "20"" m/s" rsup { size 8{2} } } {} backward. (a) what is the force of friction between the losing player’s feet and the grass? (b) what force does the winning player exert on the ground to move forward if his mass plus equipment is 110 kg? (c) draw a sketch of the situation showing the system of interest used to solve each part. for this situation, draw a free-body diagram and write the net force equation.

Answers: 2

Answer

Physics, 22.06.2019 21:40

Ahair dryer is basically a duct in which a few layers of electric resistors are placed. a small fan pulls the air in and forces it through the resistors where it is heated. air enters a 1200 w hair dryer at 100 kpa and 22°c and leaves at 47°c. the cross-sectional area of the hair dryer at the exit is 60 cm2. neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.

Answers: 1

Answer

You know the right answer?

It has been proposed that we could explore Mars using inflated balloons to hover just above the surf...

Questions