In some areas, farmers have installed windmills to generate electricity to run the farm. some are generating a surplus of electricity and selling it back to the power company. the local power company burns fossil fuels, which pollute the environment, to generate electricity. windmills do not pollute the environment. evaluate the statements and choose the statement that best describes how the windmill technology benefits the environment.

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

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

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?