Physics, 24.09.2020 08:01 ArelysMarie
A heating cable is embedded in a concrete slab for snow melting. The heating cable is heated electrically with joule heating to provide the concrete slab with a uniform heat of 1200 W/ m2. The concrete has a thermal conductivity of 1.4 W/m⋅K. To minimize thermal stress in the concrete, the temperature difference between the heater surface (T1) and the slab surface (T2) should not exceed 25°C (2015 ASHRAE Handbook—HVAC Applications, Chap. 51). Formulate the temperature profile in the concrete slab, and determine the thickness of the concrete slab (L) so that T1 − T2 ≤ 25°C.
Answers: 3
Physics, 22.06.2019 23:00, itscheesycheedar
Astronomers studying the planet of rhombus have detected sedimentary rock on its surface. one astronomer wonders if material in this sedimentary rock used to be in igneous rock deep in rhombus’s interior. can igneous rock become sedimentary rock? explain your answer.
Answers: 1
Physics, 23.06.2019 14:20, kiannasmith46
When a person spins a bucket of water in a circle, the force acting on the bucket to keep the water inside is called
Answers: 2
A heating cable is embedded in a concrete slab for snow melting. The heating cable is heated electri...
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