Problem 34. (20 pts) a string of mass per unit length fi1= 0.01 kg/m is joined to a second string of mass per unit length u2=0.02 kg/m. the strings are under a tension of 100 n. the strings are an incident pulse is launched in string one moving towards positive z and towards the junction of the two strings. let the incident pulse be a rectangular pulse of height 10 cm and width 4 cm. along the z-direction and a) find the impedances of the strings and the speeds at which pulses travel in the strings b) find the reflection and transmission coefficients p and 7 c) find the heights and widths of the reflected and transmitted pulses. d) sketch the shape of the string some time after the incident pulse has encountered the join between the strings. (so that only the reflected and transmitted pulses are in the strings.) problem 35. repeat problem 34 if /i1 0.02 kg/m and i2=0.01 kg/m

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.  

f=ma a/f/m a= 480/60 a = 8m/s/s that is quick wow

-first use of geothermal energy occurred more than 10,000 years ago in north america by american paleo-indians

-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

-with the above experiment, the first geothermal plant in usa started in 1922 with a capacity of 250 kilowatts

-however, in 1946 first ground-source geothermal heat pump installed at commonwealth building in portland, oregon

-during the 1960’s, pacific gas and electric began operation of first large scale geothermal power plant in san francisco, producing 11 megawatts

-in 1973, when oil crisis began many countries began looking for renewable energy sources and by 1980’s geothermal heat pumps (ghp) started gaining popularity in order to reduce heating and cooling costs

-as effect of climate change started showing results, governments of various countries joined hands to fight against it, for which kyoto protocol was signed in japan in 1997, laid out emission targets for rich countries and required that they transfer funds and technology to developing countries, 184 countries have ratified it

hope this