Engineering, 06.05.2020 07:17 cinderalla16dh
With the advent of photosynthesis, the amount of oxygen in the atmosphere has varied over the eons up to 35 % by volume, theoretically leading to larger plants and animals. The current concentration is 21 % oxygen, 78 % nitrogen, and 1 % other gases such as argon and carbon dioxide Assuming an atmosphere of 32 % oxygen, to the nearest whole number (no decimal) what would be the ideal volume of water (in mL) initially placed in a 50 mL graduated cylinder (assuming the graduation goes up to the lip of the container) for optimal combustion (biggest explosion) if we collected pure hydrogen by displacement as in this experiment? Make sure to account for the stoichiometry of the combustion, that all gases involved are diatomic, and that equal moles of different ideal gases occupy equal volumes at the same temperature.
Answers: 3
Engineering, 04.07.2019 18:10
Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86
Answers: 2
Engineering, 04.07.2019 18:10
Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.
Answers: 2
Engineering, 04.07.2019 18:10
A-mn has a cubic structure with a0 0.8931 nm and a density of 7.47 g/cm3. b-mn has a different cubic structure, with a0 0.6326 nm and a density of 7.26 g/cm3. the atomic weight of manganese is 54.938 g/mol and the atomic radius is 0.112 nm. determine the percent volume change that would occur if a-mn transforms to b-mn.
Answers: 2
Engineering, 04.07.2019 18:20
Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?
Answers: 3
With the advent of photosynthesis, the amount of oxygen in the atmosphere has varied over the eons u...
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