The pressure and temperature at the beginning of compression of a cold air-standard diesel cycle are 100 kpa and 300k, respectively. at the end of the heat addition, the pressure is 7.2 mpa and the temperature is 2250 k. assume constant specific heats evaluated at 300 k. determine the cut-off ratio. there is a +/- 5% tolerance.

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?

What is a monomer? how do they form a ploymer from the view point of chemical bonding?