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A self-excited shunt DC generator is rated 10 kW. 125 V, and has friction and windage losses of 1200 W and core losses of 750 W when operating at rated flux. A field current of 6.0A is required and the armature circuit resistance is 0.24 ohm. Assume the field current and machine speed arc constant. Calculate the power required to turn the generator at no load, with 125V at the generator terminals. Repeat the calculation in A) above for a separately excited generator. Calculate the power t...

C++ help please! This game will store the alphabet in a string called letters and then select a random letter from the string using a random number as an index for the substr function. The game will ask the user to guess a letter, verify that it is a single letter and then compare the input against the random letter chosen. The game will continue until the player guesses the letter. */ #include #include #include #include using namespace std; ...

10) What is one of the ways that the membranes of winter wheat are able to remain fluid when it is extremely cold? by increasing the percentage of cholesterol molecules in the membrane B) by decreasing the number of hydrophobic proteins in the membrane C) by increasing the percentage of unsaturated phospholipids in the membrane D) A and B E) A, B, and C A) 11) All of the following statements about membrane structure and function are true except: A) Diffusion of gases is faster in air than a...

A circuit contains only a(n) 0.219 H inductor. An AC voltage of peak value 163 V and frequency 61.3 Hz is applied to the circuit. When the instantaneous voltage is 163 V, what is the instantaneous AC current? Answer in units of A Solution V = Vo sin (2ft) ; f = frequency = 163 sin (385t) XL = j L = j 2fL = 84.31 j I = V/X = 163 / 84.31 = 1.9334 A ; lagging by 90o

A radioactive isotope decays according to the equation where Nt is the amount of sample at time t. N0 is the original amount of sample, and lambda is the decay constant. An unknown amount of an unidentified isotope is left to decay, and periodic measurements of the remaining isotope are recorded in the table below. What is lambda, the decay constant? What is NQ, the original amount of radioactive material? Solution take two values dividing proporttionally 1.5/5.11=e^((31-11))...

A balanced, positive-sequence, Y-connected voltage source with Vab = 500 Solution Vph=Vl/3 in star connection Iph=Il in star connection Vph=Vl in delta connection Iph=Il/3 in delta connection hence VaA=Vl/3=500/3=288.68Volts similarly VbB=288.68<-1200 VcC=288.68<1200 hence IaA=VaA/Z=288.68<0/2<85=144.34<-850 therefore IbB=288.68<-2050 IcC=288.68<350 calculate from above IAB=IaA-IbB IBC=IbB-IcC ICA=IcC-IaA then VAB=IAB*Zl where Zl=30<400 similarly ...

13. How could you determine the correct temperature range, specific enzyme? salt concentration, and pH for a Types of Enzymes in the Human Body: below, search and read about the enzyme. What does it help the body do? Where is it located in the body? What might happen if that enzyme was not there or did not work properly? Write AT LEAST Salivary Amylase: Pepsin: Solution Question 1: This can be check by pH and temperature experiment. You can standardise or find out any functional as...

A neutral solution... a. has no H+ b. has no OH c. has equal amounts of Ht and OH- d. is hydrophobic e. has a pHi of 0 Buffers prevent wide swings in pH. Hw do buffers work? a. Soak up extra acid and base b. Accept or release H+ c. Accept or release OH d. Convert Ht and OH- to water e. Monitor the blood pH Polar covalent bonds form when... a. electrons are shared unequally between atoms. b. more than one pair of electrons is shared c. ions are formed. d. an acid and base are combined e. ato...

Biology 401, Spring 2018 Problem Set 2 6. A few amino acids are post-translationally removed from the C-terminal end of the beta- lactamase enzyme from B. imaginarium (i.e. - after it is translated and released from the ribosome, a protease chews off a few amino acids). The wild- type enzyme, which has had the amino acids removed from the C'-terminus, is 327 amino acids in length and the C-terminal amino acids are shown below aligned with the C-terminal amino acids of a frameshift mutant...

24. Man, that is a ton of mussels on that rock bedl What type of competition describes an organism occupying space in attempt to outcompete others? a. Allelopathy b. Overgrowth c. Encounter Preemptive Solution Allelopathy is found in plants. It is a mechanism by which a plant hinders the growth of other plants by producing chemicals. Overgrowth is defined as uncontrolled growth of any organism or population. Encounter is referred as sudden exposure to any difficulty or face somethin...