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  2. NEMA size - Wikipedia

    en.wikipedia.org/wiki/NEMA_size

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  3. 'Vigorous activity:' How old is too old to be shoveling snow ...

    www.aol.com/vigorous-activity-older-adults...

    Snowblowers are also safer and quicker to use than shovels. Research shows using a snowblower raises the heat rate to about 120 beats a minute compared with a heart rate of about 170 beats a ...

  4. Voltage converter - Wikipedia

    en.wikipedia.org/wiki/Voltage_converter

    The output will usually be DC in the range 1.5–24 V. Power supplies that output either 100–120 V AC or 210–240 V AC are available; they are called inverters, due to the conversion from DC to AC rather than the voltage change. The output frequency and waveform of an inverter may not accurately replicate that supplied by mains electricity ...

  5. Coefficient of performance - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_performance

    Less work is required to move heat than for conversion into heat, and because of this, heat pumps, air conditioners and refrigeration systems can have a coefficient of performance greater than one. The COP is highly dependent on operating conditions, especially absolute temperature and relative temperature between sink and system, and is often ...

  6. Power-to-weight ratio - Wikipedia

    en.wikipedia.org/wiki/Power-to-weight_ratio

    A typical turbocharged V8 diesel engine might have an engine power of 250 kW (340 hp) and a mass of 380 kg (840 lb), [1] giving it a power-to-weight ratio of 0.65 kW/kg (0.40 hp/lb). Examples of high power-to-weight ratios can often be found in turbines.

  7. List of Ford engines - Wikipedia

    en.wikipedia.org/wiki/List_of_Ford_engines

    1948–1953 254 CID Flathead used in buses and two ton trucks; 1952–1964 OHV (215, 223, 262) 215-223 used in car and non-HD pickups. 262 used in HD trucks only. 144 CID straight-6 in a 1964 Ford Falcon. 1960–1993 (Longer in Australia) 'Falcon Six' OHV (144, 170, 200, 250) car usage. 1964–1996 OHV (240, 300, 4.9 L) truck 6 built in ...

  8. Seasonal energy efficiency ratio - Wikipedia

    en.wikipedia.org/wiki/Seasonal_energy_efficiency...

    Air-conditioner sizes are often given as "tons" of cooling, where 1 ton of cooling equals 12,000 BTU/h (3.5 kW). 1 ton of cooling equals the amount of power that needs to be applied continuously over a 24-hour period to melt 1 ton of ice. The annual cost of electric energy consumed by an air conditioner may be calculated as follows:

  9. Ton of refrigeration - Wikipedia

    en.wikipedia.org/wiki/Ton_of_refrigeration

    Just as horsepower and candlepower were intuitive units of measure for people living through the transition from horse to steam power [3] and from flame-based to electric lighting, so was the ton of refrigeration an intuitive unit of measure during a technological change, as the ice trade gradually included growing percentages of artificial ice ...