Write an arduino sketch that programs your multi-colored led so that the red and green leds are on for 500 ms, then only the blue led is on for 500 ms, then finally only the green led is on for 500 ms. this pattern of leds flashing should continue forever. circuit hint: 
 • you can wire up leds from digital pins 10, 11, and 12 of your arduino with a 330 ohm resistor for each led. make sure that all the grounds are connected together to arduino gnd.

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)