You have 3 attempts. Use 3 significant digits for your answer. Use g = 10 m/s/s. An 80 kg skydiver jumps out of a stationary air balloon at an altitude of 1000 m. At an altitude of 600 m, the skydiver is traveling at 40 m/s. D 1 How much work is done by all non-conservative force(s) from 1000 m to 600 m?
2 The sky diver falls to 200 m at the constant speed of 40 m/s. How much work is done by all non-conservative force(s) from 600 m to 200 m2
3 The parachute opens and the skydiver slows 5 m/s just before landing. How much work is done by all non-conservative force(s) from 200 m to just before landing at 5 m/s?
4 Take the three parts of the trip as a single trip. How much work is done by all non-conservative force(s) from 1000 m to just before landing at 5 m/s?

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

The mini-refrigerator fire was most likely caused by what type of wiring?

Each neuron shown in this figure innervates a group of muscle fibers. what is the term for a group of muscle fibers innervated by a single neuron?