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NOR GATE If all inputs are low, the output is high.otherwise the output is low. SYMBOL: NOR Gate symbol CIRCUIT DIAGRAM : Nor gate circuit diagram Boolean expression Y= A+B TRUTH TABLE A B Y= A+B 0 0 1 0 1 0 1 0 0 1 1 0

DEMORGAN’S THEOREM-2 Demorgan’s second theorem stated as follows in words, The complement of a product  is equal to the sum of the individual components. it says the complement of to or more variable ANDed is the same as the OR complements of each individual variable. SYMBOL: Demorgans 2nd therom symbol CIRCUIT DIAGRAM: Demorgans 2nd theromcircuit diagram BOOLEAN EXPRESSION: Demorgans 2nd theromboolean expression TRUTH TABLE: INPUT OUTPUT INPUT OUTPUT A B Y= A B Y= 0 0 1 0 0 1 0 1 1 0 1 1 1 0 1 1 0 1 1 1 0 1 1 0                                        This experiment can be Done using the Electronic workbench software. If find useful Share this:

                         AND GATE *If all inputs are high, the output is high. otherwise, the output is low. *It is sometimes called the "all or nothing gate". *It has 2 or more input signals. SYMBOL: AND gate logic symbol CIRCUIT DIAGRAM AND Gate circuit diagram Boolean Expression=A*B TRUTH TABLE A B Y=A*B 0 0 0 0 1 0 1 0 0 1 1 1

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GPT HUBLI (GOVERNMENT POLYTECHNIC HUBLI) This Video is taken on the occasion of Teachers day On 2010 from 3rd sem Mechanical engineer students.

Question :   Viscosity mu is property of gases and fluids that characterises their resistance to flow. For most materials viscosity is highly sensitive to temperature. Below is a table that gives the viscosity of SAE 10w oil at different temperatures. Determine an equation that can be fitted to the data. T 0 c -20 0 20 40 60 80 100 120 mu(N-s/m 2 ) 4.0000 .38 .095 .032 0.0150 0.0078 0.0045 0.0032 %in script file T=[-20:20:120]; mu=[4 0.38 0.095 0.032 0.015 0.0078 0.0045 0.0032]; Tk=T+273; P=polyfit(Tk,log(mu),2); Tplot=273+(-20:120); muplot=exp(P(1)*Tplot.^2+P(2)*Tplot+P(3)); semilogy(Tk,mu,'r',Tplot,muplot); xlabel('temperature(kelvin)' ylabel('viscosity(N-S/M^2)') title('Given data fitted as shown in plot') Matlab for engineers

Question : The outside dimensions of a rectangular box(top open) made of aluminium are 24x12x4 inches. the wall thickness of the bottom and the sides is x. derive an expression that relates the weight of the box and the wall thickness x. determine the thickness x for the box that weighs 15 lbs. The specific weight of the alumininum is 0.101 lb/cubic inch.   Using Matlab 7.0 software %in script file w=15; gama=0.101; Val=w/gama; a=[-2 24]; b=[-1 4]; c=[-1 4]; Vin=conv(c,conv(a,b)); polyequation=[0 0 0 (Val-24*12*4)]+Vin r=roots(polyequation); %in command window >> wallthickness polyequation =    -2.0000    40.0000 -224.0000 -619.4851  for mechanical engineering,electronics engineer,engineers.

TO KNOW MORE ABOUT YOUR COURCE(MECH ENGG) SEE, What does a real mechanical engg do? what is the future for mech engg gradute? scope of higher education who should opt for mech engg... Mechanical Engineering :

Problem : A cylindrical silo with radius r has a spherical cap roof with radius R. the height of the cylindrical portion is H. write a program in a script file that determines the height H for given values of r, R and the volume V. In addition, the program also calculates the surface area of the silo. Use the program to calculate the height and surface area of a silo with r=30 m , R=45m  and volume of 120000 cubic metre.. assign values for r,R and V in the command window. USING MATLAB 7.0 SOFTWARE % in script file theta=asin(r/R); h=r*(1-cos(theta)); Vcap=pi*h^2*(3*R-h)/3; H=(V-Vcap)/(pi*r^2); s=2*pi*(r*H+R*h); fprintf('the height H is %f mt',H) fprintf('\n the surface area of silo is %f',s) % command window >> r=30; >> R=45; >> V=120000; >> silo the height H is 39.688478 mt  the surface area of silo is 9641.068715>>

Problem :                                 create a function file that calculates the trajectory of a projectile. The inputs to the function are the initial velocity and the angle at which the projectile is fired. The outputs from the function are the maximum height and distance. In addition, the function generates a plot of the trajectory. Use the function to calculate the trajectory of a projectile that is fired at a velocity of 230 m/sec at an angle of 39deg.  USING MATLAB SOFTWARE Version 7.0 SOLUTION:- %Write it in script file function[hmax,dmax]=trajectory(V0,theta)               g=9.81; V0x=V0*cos(theta); V0y=V0*sin(theta); thmax=V0y/g; hmax=V0y^2/(2*g); ttotal=2*thmax dmax=V0x*ttotal  % creating a trajectory plot tplot=linspace(0,ttotal,200); x=V0x*tplot; y=V0y*tplot-0.5*g*tplot...