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Tankless, point-of-use water heaters are commercially available and are claimed to reduce energy usage since water is only heated when needed. Consider an application in a bathroom where hot water is needed to be produced at a rate of 0.2 L/s by raising the temperature from 10 °C to 45 °C. (a) Draw a schematic of the system. Using electric resistance heaters, determine (b) the required power (kW) needed to raise the water temperature and (c) the entropy generation rate (kW/K).
You are asked to measure the rate at which waste gases are being discharged from a stack. The gases entering contain 2.1 % carbon dioxide. Pure carbon dioxide is introduced into the bottom.
a catheter is a specialised needle intended for long-term insertion into a vein in a patients arm. engineers are
A particular grade of Nitinol SMA is capable of upto 6% strain recovery and develops an internal restoration stress of upto 300 MN m-2. Estimate the amount of force and distance of travel that could be triggered by warming a rod
A similar measurement is made applying the force parallel to one of the cube axes. Explain why the two measurements give different values of the elastic modulus.
a 517-kg cannon fires a 16.5-kg projectile with a speed of 265 ms with respect to the muzzle. the cannon is on wheels
The mean diameter of a conical friction clutch is 250mm with a width of the conical surface being 50mm. The clutch is lined with a material having a coefficient of friction of 0.25
use potential flow theory to determine the lift coefficient of a spinning baseball in terms of the forward velocity v
Use calculus to obtain a closed-form solution for the case where the parachutist jumper is initially at rest (v=0 at t=0) to solve F(upward)= -cv^2, where c = a second-order drag coefficient (kg/m).
the basketball player likes to release his foul shots with an initial speed v0 23.5ftsec. what values of the initial
a uniform chain of total mass m and total length l lies in a heap on a table. one end is pulled upwards at constant
the compression ratio of an ideal dual cycle is 14. air is at 100 kpa and 300 k at the beginning of the compression
a piston cylinder device contains 1 kg of liquid water at 200kpa and 25 deg c. heat is added to the water in the
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