53. The table below shows some of the properties of the elements cobalt and nickel. PROPERTIES OF COBALT AND NICKEL
Cobalt
Nickel
Property
Mass
10 grams
11 grams
8.902 g/cm
8.900 g/cm
Density
Electrical
Conductivity
Reactivity with
Oxygen
conductive
conductive
unreactive
unreactive
A scientist has a sample of metal that could be either cobalt or nickel. Which of the following
properties could be tested to classify the metal sample?
O mass
Odensity
O electrical conductivity
O reactivity with oxygen

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

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

Select all that applywhat are some basic resources a family is expected to provide for children? educationclothesspending