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In an experiment, the temperature of a hot gas stream is to be measured by a thermocouple with a spherical junction. Due to the nature of this experiment, the response time of the thermocouple to register 99% of the initial temperature difference must be within 5s. The properties of the thermocouple jinction are k=35 w/m.k, p=8500 kg/m^3, and cp = 320 J/kg.k. If the heat transfer coefficient between the thermocouple junction and the gas is 250 w/m^2.K, determine the diameter of the junction.
A window-mounted room air conditioner removes energy by heat transfer from a room and rejects energy by heat transfer to the outside air. The air conditioner cycle requires a power input of 0.434 kW and has a coefficient of performance of 6.22.
Honda Civic 2012 model has an EPA rating of 28 mpg city and 39 mpg highway. What is the thermal efficiency of Honda Civic for city and highway respectively?
The extrusion ratio, die geometry, extrusion speed, and billet temperature all affect the extrusion pressure. Explain why.
you are on a date. your date runs out of gas unexpectedly. you come to your own rescue by siphoning gas from another
a cold-drawn aisi 1018 steel bar similar to the component shown in the diagram of table a- 15-1 is subjected to an
a plane wall 15 cm thick has a thermal conductivity given by the relation k 2.0 0.0005t wmk. where t is in kelvin.
a classroom is occupied by 55 students and one instructor each generating heat at a rate of 100 w. lighting is provided
A balloon behaves so the pressure is P = C2V1/3, C2 = 100 kPa/m. The balloon is blown up with air from a starting volume of 1 m3 to a volume of 3 m3. Find the final mass of air assuming it is at 25oC and the work done by the air.
A rotating saw blade has 48 teeth and 4 slots. If the room where the saw is used is illuminated with a pulsed light source, at what pulse frequencies will a) the saw blade teeth appear to be stationary? b) The blade slots appear stationary? c) Will t..
an un-stretched spring initially is attached to a horizontal piston round shape. heat is added to the gas until the
Atoms are 1-dimensionally aligned with an inter atomic distance of 10nm. Let’s assume that the positive charge of the nucleus of the atom is infinitely large so that electrons are confined to a specific atom. Then, what wavelength photons are require..
Problem: Find the stress, strain and displacement fields in elastic layer structure shown below.
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