Helium in the balloon is initially at 15°c and 550 kpa and cv = 3.12 kj/(kg-k) for helium. the balloon can be considered to be a rigid sphere with a radius of 25 m. (a) determine the mass of helium in the balloon, in kg. (b) as the balloon rises, the helium is heated by solar radiation to 300°c. the balloon will burst if the pressure in the balloon is greater than 1.1 mpa. will the balloon burst? why or why not? (c) what is the heat transfer to the balloon due to solar heating, in mj? (d) the air balloon company wants to reduce mass of the ball

Consider the particle-in-a-box problem in 1d. a particle with mass m is confined to move freely between two hard walls situated at x = 0 and x = l. the potential energy function is given as (a) describe the boundary conditions that must be satisfied by the wavefunctions ψ(x) (such as energy eigenfunctions). (b) solve the schr¨odinger’s equation and by using the boundary conditions of part (a) find all energy eigenfunctions, ψn(x), and the corresponding energies, en. (c) what are the allowed values of the quantum number n above? how did you decide on that? (d) what is the de broglie wavelength for the ground state? (e) sketch a plot of the lowest 3 levels’ wavefunctions (ψn(x) vs x). don’t forget to mark the positions of the walls on the graphs. (f) in a transition between the energy levels above, which transition produces the longest wavelength λ for the emitted photon? what is the corresponding wavele

Time remainin52: 42the chart shows data for a moving object.which conclusion is best supported by the information inthe chart? time (s)velocity (m/s

When electrons are added to the outermost shell of a carbon atom, it forms--an anion that has a larger anion that has a smaller cation that has a larger cation that has a smaller radius.