A 1m long nichrome wire dissipates heat energy of 10kWto surrounding fluid at 80°C. If the max operating temp in thewire is 1000°C. Take h=1000W/m2K and k for nichrome as 60W/mK. What should be diameter of the wire?

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

Acertain flow of air (at stp) has a velocity distribution given by v i (in ft/s). if this flow is going through a 4 ft square area in the yz-plane (centered at the origin), what is the mass flow rate (in lbm/s)?

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?