Avolumetric flow rate 1250 cm^3 s^-1 of water is to be pumped through a steel pipe of an inner diameter 25 mm and a total length 30m, to a tank 12 m higher than its reservoir. the entrance and exit losses may be neglected. the viscosity and density of the water are 1.30 x 103 ns m^2 and 1000 kg m, respectively. the roughness of the steel pipe is 0.045 mm. calculate the power required by the pumping system. if a pump efficiency of 60% is assumed, calculate the power of the pump motor

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?

At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.