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The National Transonic Facility (NTF) is a wind tunnel designed to operate at Mach and Reynolds numbers comparable to flight conditions. It uses nitrogen at cryogenic temperatures as the working fluid. A schlieren photograph taken in the NTF of a 1/20th scale model of a Concorde airplane (full-scale wingspan of 30 m) shows a Mach angle of 28° at a point where the temperature is 100°K and the pressure is 9, 000 P a. Find the local Mach number and the Reynolds number based on the model wingspan, given that the viscosity of nitrogen under these conditions is 7 × 10-6N · s/m2 . Compare with the conditions experienced by the full-scale airplane flying at 600 m/s at an altitude of 20, 000 m in a standard atmosphere.
Question- A solution is made by mixing 500.0 mL of 4.0 M NH3 and 500.0 mL of 0.40 M AgNO3. Ag+ reacts with NH3 to form AgNH3+ and Ag(NH3)2+ according to the equilibrium reactions
When you allow a can of carbonated beverage to sit open so that the carbon dioxide is released to the atmosphere ,does the pH of beverage remain the same,increase or decrease. Explain
Express the molecular weight of K2Cr2O7 with the correct number of significant figures and find its uncertainty.
ow many stereo-isomers would there be if a molecule had four chiral centres, Rank the different carbocations in order of their stability.
A mole of photons in the blue visible region of the electromagnetic spectrum has an energy of 2.54 × 10 2 kJ/mol, calculate the frequency in s-1 of the photon.
The hottest temperature yet recorded in Phoenix AZ was 122 dgrees F what is the temperaturein degrees C and K
A proton in a linear accelerator has a de Broglie wavelength of 149\rm pm . What is the speed of the proton?
It was discontinued in 1988 in recognition of its persistence and accumulation in the environment. Identify the reagents you would use to prepare chlordane using a Diels-Alder reaction. Please explain the mechanism!
Problem- Calculate the binding energy (kJ/nucleon) for a Cu-63 nucleus. H-1 = 1.00785 g/mol, n-1= 1.008665 g/mol, Cu-63= 62.93960 g/mol.
Molecular Orbital theory properly redictsparamagnetism of oxygen gas, O2. This is because a) There are two unpaired electrons in the MO electron configuration of O2
During a basal metabolic test, Steve consumes 460. L of O2.- What is Steve's body mass?- What is the change in his BMR oxygen intake if he loses 15.0 kg of body mass?
Calculate its standard heat of combustion in kilojoules C5H12O with a Delta H of -313.6 kJ/mol
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