A 12-in.-diameter pipe leaves a reservoir of surface elevation 300 at elevation 250 and drops to elevation 150, where it terminates in a 3-in.-diameter nozzle. If the head lost through line and nozzle is 30 ft, calculate the flow rate.

An airplane wing, with chord length of 1.5 m and span of 9 m, is designed to move through standard air at a speed of 7.5 m/s. A 1:10 scale model of this wing is to be tested in a water tunnel. What speed is necessary in the water tunnel to achieve dynamic similarity? What will be the ratio of forces measured in the model flow to those on the prototype wing?

Which of these is not a characteristic of carbon? a. forms four covalent bonds b. bonds with other carbon atoms c. is sometimes ionic d. can form long chains e. sometimes shares two pairs of electrons with another atom

Water in a piston/cylinder is at 101 kPa, 25$^{\circ} \mathrm{C}$ and mass 0.5 kg. The piston rests on some stops, and the pressure should be 1000 kPa to float the piston. We now heat the water from a 200$^{\circ} \mathrm{C}$ reservoir, so the volume becomes five times the initial value. Find the total heat transfer and the entropy generation.

H. ergaster could have been the first Homo species to a. use and control fire.b. migrate out of Africa.c. make axes and cleavers.d. All of these are correct.

Water flows through a 2-in.-diameter tube that suddenly contracts to 1 in. diameter. The pressure drop across the contraction is 0.5 psi. Determine the volume flow rate.

A reservoir manometer is calibrated for use with a liquid of specific gravity 0.827. The reservoir diameter is 5/8 in. and the vertical tube diameter is 3/16 in. Calculate the required distance between marks on the vertical scale for 1 in. of water pressure difference.

Why is it possible to kick a football farther in a spiral motion than in an end-over-end tumbling motion?

I drive down the highway at 110 km/h on a 25$^{\circ} \mathrm{C}$, 101.3 kPa day. I put my hand, cross-sectional area 0.01 m2, flat out the window. What is the force on my hand and what temperature do I feel?

E85 is a liquid mixture of 85% ethanol and 15% gasoline (assume octane) by mass. Find the lower heating value for this blend.

Consider an ideal heat pump that has a condenser temperature of 120 F and an evaporator temperature of 30 F. Determine the COP of this heat pump for the working fluids R-410a and ammonia.

An approximation for the saturation pressure can be ln Psat =A−B/T, where A and B are constants. Which phase transition is that suitable for, and what kinds of property variations are assumed?

Consider the previous reaction in equilibrium at 150$^{\circ} \mathrm{C}$, 5 MPa. For an initial composition of 25% nitrogen, 75% hydrogen, on a mole basis, calculate the equilibrium composition.

A fluid occupying 3.2 m$^{3}$ has a mass of 4 Mg. Calculate its density and specific volume in SI, EE, and BG units.