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The kinetic energy of a 2 kg mass travelling at 1 m/s, or a 1 kg mass travelling at 1.41 m/s. The energy required to lift an apple up 1 m, assuming the apple has a mass of 101.97 g. The heat required to raise the temperature of 0.239 g of water from 0 °C to 1 °C. [15] The kinetic energy of a 50 kg human moving very slowly (0.2 m/s or 0.72 km/h).
1 kg⋅m 2 ⋅s −3 The volt-ampere ( SI symbol : VA , [ 1 ] sometimes V⋅A or V A ) is the unit of measurement for apparent power in an electrical circuit . It is the product of the root mean square voltage (in volts ) and the root mean square current (in amperes ). [ 2 ]
The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m 2 ⋅s −3. [ 1 ] [ 2 ] [ 3 ] It is used to quantify the rate of energy transfer .
Electric power is the rate of transfer of electrical energy within a circuit.Its SI unit is the watt, the general unit of power, defined as one joule per second.Standard prefixes apply to watts as with other SI units: thousands, millions and billions of watts are called kilowatts, megawatts and gigawatts respectively.
Pen20 – Power Pentode with a 20 V/180 mA heater and a British 5- or 7-pin base PM254 = P425 – "Super Power" triode with a 4 V/200 mA battery heater and a British 4-pin base TDD4 = MHD4 = AC/HLDD – T riode, dual D iode with a 4 V/550 mA heater and a British 7-pin base
The watt, kilogram, joule, and the second are part of the International System of Units (SI). The hour is not, though it is accepted for use with the SI.Since a watt equals one joule per second and because one hour equals 3600 seconds, one watt-hour per kilogram can be expressed in SI units as 3600 joules per kilogram.
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In electronics, a common-base (also known as grounded-base) amplifier is one of three basic single-stage bipolar junction transistor (BJT) amplifier topologies, typically used as a current buffer or voltage amplifier.