Gases produced during the combustion of a fuel-air mixture, enter a nozzle at 200kpa, 150°c and 20m/s and leave the nozzle at 100kpa and 100°c. The exit area of the nozzle is 0.03m². Assume that these gases behave like an ideal gas with Cp = 1.15 kJ/kg. K and Y = 1:3, and that the flow of gases through nozzle is steady and adiabatic. Determine i. the exit velocity ii. the mass flow rate.​

During physical science, ms. greene challenged her students to produce an energy transformation. james and jill wrapped a 4-inch nail with a coil of fifty turns of wire. they connected one end of the coil to one terminal of a knife switch. they connected the other terminal of the knife switch to the battery. finally, they connected the end of the coil to the other terminal of the battery. james held the tip of a 1-inch nail near the flat end of the 4-inch nail. jill closed the knife switch quickly and then opened it. the 1-inch nail was pulled toward the 4-inch nail. what is the best explanation of why the nail moved? a) electrical energy was converted to mechanical energy in the 1-inch nail. b) the 4-inch nail became an electromagnet and the magnetic force attracted the 1-inch nail. c) the electric current in the 4-inch nail was converted to mechanical energy in the 1-inch nail. d) the 4-inch nail had a positive charge and the 1-inch nail had a negative charge. opposites attracted.

Astudent pushes a 60-n block across the floor for a distance of 10 m. how much work was done to move the block

Ahole in the ground in the shape of an inverted cone is 14 meters deep and has radius at the top of 11 meters. the cone is filled to the top with sawdust. the density of the sawdust depends upon the depth, x, following the formula ρ ( x ) = 2.5 + 1.2 e − 0.7 x kg/m3. find the total mass of sawdust in the conical hole.