Reference no: EM13277837
Question 1
For Australia, the growth in population from the year 1990 can be approximated by the equation
P(t) = 17e0.0108t
where P(t) is the population in millions of people and t is time in years from the year 1990.
(a) What was the approximate population in 1990 (t = 0)?
(b) Using equation 1, calculate the approximate population for the year 2015 (t = 25).
(c) According to equation 1, in what year will the Australian population reach 30 million?
Question 2
In the electrical circuit shown in figure1, there is a self induced back electromotive force (emf) which opposes the change in current and
remains until the current in amperes increases from 0 to its final value, Vs/R . The circuit current at any time is:
where Vs is the Supply voltage in volts, R the circuit resistance in ohms, L the circuit inductance in henry and t is time in seconds.
Show how the inductance, L in?uences the current, I by sketching two curves of the current versus the time for a high circuit inductance, 1 H and a low circuit inductance, 10-3 H. Note that the self induced emf will always be less than the supply voltage so your current curves will never fall below 0 but will both reach a maximum limit of Vs.
|
Calculate the exact abcd parameters of the line
: assuming positive-sequence operation,calculate the exact abcd parameters of the line.compare the exact B parameter with that of the nominal II circuit.also compare the equivalent and nominal II circuit for the line.
|
|
Find the minimum angle,between the ladder and the ground
: A uniform ladder of length L and mass 5 kg rests against a smooth, frictionless, vertical wall. Find the minimum angle,between the ladder and the ground at which the ladder will not slip
|
|
Explain magnesium metal burns in oxygen
: Write a balanced chemical equation when Magnesium metal burns in oxygen to form magnesium oxide, MgO
|
|
What is the potential energy of the satellite-earth system
: A satellite in Earth orbit has a mass of 106 kg and is at an altitude of 1.94 106 m.(Assume that U = 0 as r ? infinity), What is the potential energy of the satellite-Earth system
|
|
Calculate the approximate population for the year
: What was the approximate population in 1990 and calculate the approximate population for the year 2015 (t = 25).
|
|
Compute the potential difference across each capacitor
: A 0.50 microF and a 1.4 microF capacitor (C1 and C2, respectively) are connected in series to a 15-V battery, Calculate the potential difference across each capacitor
|
|
Discuss the patenting and pharmaceutical regulations
: Discuss the patenting and pharmaceutical regulations for their drug discovery and development project. Outline the patentability aspects of your drug and outline a set of claims that could be used in a patent. Briefly document regulatory hurdles with..
|
|
What was the heat transfer into this engine
: A certain heat engine does 10.2 kJ of work and 9.5 kJ of heat is transfered to the environment in a cyclical process. What was the heat transfer into this engine
|
|
Explain produce the most heat energy
: When one mole of each of the following liquids is burned, which will produce the most heat energy. a. C5H12 b. C6H14 c. C6H10O d. C6H12O e. C6H14O
|