The follow
ing post has three assignments namely;
1.Postmodern artists
The work of many postmodern artists was a cynical repetition of the
innovation of the avant-garde, emptied of utopian aims. Is this a fair assessment? Discuss with reference to one avant-garde
artist and one postmodern artist exam
ined
in this subject.
2.An elevator performance
maximize an elevator performance us
ing a motor that generates peak power at a rotational speed of 340
radians/second and a torque of 0.021 N-m. You spool of l
ine has a radius of 0.03 rn.
The design (objective) function is given as
X = W2r3a
1. Calculate the maximum weight that can be lifted for each gear ratio
2. Calculate the time it would take to move the elevator one meter for each gear ratio
3. Calculate your design function's value for each gear ratio
4. Plot the design function for all viable gear ratios as a function of gear ratio
5. Select the optimal gear ratio for your system to maximize the design function
I
3.Whipping cream to butter
A.
Us
ing an electric hand beater, whip 1 cup of whipp
ing cream to form whipped cream. Cont
inue whipp
ing until butter is formed. Taste the butter.
1. Describe the different colloids (two emulsions and one foam) as you turn whipp
ing cream
into whipped cream, and then on to butter. Describe the composition of the liquid rema
ining
in the bowl
after butter is formed.
B. Analysis of fats (use data collected
in Fats table)
1. Even though the serv
ing size is 14 g, some of the fats conta
in different amounts of fat per serv
ing. Discuss the major
ingredient difference that accounts for these fat (and kcal) differences.
(with the same weight of serv
ing size).
2. Do any of these margar
ines conta
in any trans fat? How do you know?
3. Consider the fats that conta
in saturated fat. For each of them, what is/are the sources of saturated fat?
4. How do
ingredient differences between shorten
ing and regular stick margar
ine affect nutritional composition (kcal and fat per serv
ing)?
5. Identify some emulsifiers conta
ined
in the margar
ines. Why are emulsifiers necessary? Why does the
ingredient list of butter NOT
include emulsifiers?
6. Name the
ingredients added to some products to “preserve freshness”. Why are these needed? (What is likely to destroy freshness?)