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A BTU is the energy required to raise one pound of water by one degree Fahrenheit. A US gallon of water weighs 8.3 pounds (3.8 kg). To raise 230 L (60 US gal) of water from 10 °C (50 °F) to 50 °C (122 °F) at 90% efficiency requires 60 × 8.3 × (122 − 50) × 1.11 = 39,840 BTU. A 46 kW (157,000 BTU/h) heater, as might exist in a tankless ...
Quick Overview. More options. Tzumi IonMug Self-Heating Stainless Steel Coffee Mug. Best if you’re on a budget. $40 at Walmart. Nextboom Nextmug Self-Heating Coffee Mug. Easiest heated coffee ...
An anode is an electrode of a polarized electrical device through which conventional current enters the device. This contrasts with a cathode, an electrode of the device through which conventional current leaves the device. A common mnemonic is ACID, for "anode current into device". [ 1] The direction of conventional current (the flow of ...
Water is a convenient heat storage medium because it has a high specific heat capacity. This means, compared to other substances, it can store more heat per unit of weight. Water is non-toxic and low cost. An efficiently insulated tank can retain stored heat for days, reducing fuel costs. [ 2] Hot water tanks may have a built-in gas or oil ...
Nexpow Memory Foam Cooling Gel Seat Cushion. A lot of sitting — be it driving or working — can inevitably lead to back and tailbone pain. This protective memory foam seat cushion contours to ...
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