TIME: HOUR PHYSICAL SCIENCES (CHEMISTRY)
GRADE 10 TERM + PORMAL EXPERIMENT - PART 2
HEATING AND COOLING CURVE OF WATER
INDIVIDUAL WORK (should be done under strict supervision)
write a selectie report which must include the following:
32
Apparatus
Method (This should be a description of what you did it should not be a
copy of the method on the worksheet provided to you)
Observations and Recording of results (Use the results recorded when
conducting the expenment)
Analysis and interpretation of results and observations
Use the graph paper provided to plot two graphs of temperature
against time on the same set of axes, to represent the data obtained
when ice is heated to boiling point and hot water is cooled down
Winte down the little of the graphs
Label each graph appropriately as "Heating curve' and Cooling
cune"
Also indicate the phases of water on the heating curve
Conclusion
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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

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25º, b) el tiempo que el balón permanece en el aire.