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Determine the pressure difference (in psi) required to make your ears pop. About how far under water would you have to submerge your ears to create the same sensation?
Consider two flat circular plates (6 inch diameter), with honey filling a 0.05 inch gap between them. If it takes 1 lbf to start sliding the plates apart at 0.25 inches/sec, what is the viscosity of
Determine: the velocity of the molten metal at the base of the sprue, the volume flow rate, the time required to fill the mold, the Reynolds number in the runner, and whether or not the flow in the
Calculate the nuclear radius of the most abundant isotope of uranium. What is the ratio of the nuclear volume of the uranium isotope in (a) to the volume of the nucleus of deuterium?
The earth has a radius of about 6.35*10^6 m and a mass of 5.98*10^24 kg. What would be the radius if the earth has the same mass density as matter in a nucleus?
A concrete with a density of 2.35 g/cm^3 has a hydrogen content of 0.0085 weight fraction. What is the atom density of hydrogen in the concrete?
The fuel has a mass density of 19.2 g/cm^3. (a) What is the mass of 235 U in the reactor? (b) What are the atom densities of 235 U and 238 U in the fuel?
Determine a.) the kinetic energy of the ball immediately after it is hit, b.) the kinetic energy of the ball when it reaches its maximum height.
Copper is added to silver to make the metal stronger and more durable. A small sterling spoon has a mass of 100 g. Calculate the number of copper and silver atoms in the spoon.
You may assume a mean atmospheric temperature of 247 K for this equation. Determine the design thrust for a throat area of 0.1 m2. Assume that k = 1.4 and MW = 20.
Knowing that the ultimate shearing stress of the bonding between the surfaces is 130 psi, determine the factor of safety with respect to shear when P = 325 lb.
Find the heat transfer rate for the heating coil and the mass flow rate of the water vapor and sketch the processes on a skeleton chart showing pertineor daw.
Draw the diagram of this situation. What is the true blood pressure in the RA? Density of saline is 1.009 g/cm^3 density of blood is 1.055 g/cm^3. Please try to explain!
If coolant enters the transmission with a mass flow energy rate of 10.0 Btu/s, what is the mass flow energy rate as it leaves the transmission?
Determine the energy transport rate for this system. Is the system gaining energy, losing energy, or is it operating in a steady state.
The total hip replacement is subjected to a force of F = 120 N. Determine the moment of this force about point A, and about point B.
On the basis of this information, compute the engineering stress (MPa) necessary to produce an engineering strain of 0.25.
The rate of heat transfer to the air is 347 kJ/kg. Neglecting kinetic and potential energy effects, determine the energy per mass developed in kJ/kg.
Liquid water enters a manifold (series of pipes) at 1000 psi and 120 °F with a mass flow rate of 3.0 x 106 lbm/hr and flows through a number of one inch diameter tubes.
A salesperson at Hydrosubs, Inc., offers to sell you a mini sub that can withstand 1,200 atmospheres of pressure. Will this mini sub work for your expedition?
If the temperature of the water is increased by 50°C, what is the pressure? Assume that the coefficients of compressibility and thermal expansion are constant?
Find the best travel route between new york and los angeles? Find a way to mount a cell phone on bicycle to permit safe, hands free operation?
Air at 1200 K, 500 kPa expands in a polytropic process, n = 1.7, to 100 kPa. What is the final temperature and the specific work performed by the gas?
Find the change in flow exergy (kJ/min) if the flow rate of compressed liquid is 4370 kg/min and the mass flow rate of superheated vapor is 1000 kg/min and b) exergetic efficiency.
Air with mass flow rate of 0.4 kg/s enters an insulated compressor operating at steady state. Determine the power required by the compressor and the rate of exergy destruction {kW}.