I am assuming you're referring to AC voltage and that the 280 volts are peak-to-peak.
In such a case, the effective voltage would be 280 divided by the square root of 2.
sqrt(2) ~ 1.414
280/1.414 = 198.02 volts
This is also called the rms (Root Mean Square)
280 is the real value the K signify a multiplier of 1000 so 280000is the final value
In a Direct Current circuit power is equal to the product of current times voltage or in another form of the same equation, power divided by voltage equals current in amps. 280 watts divided by 24 volts equals 11.6666666 amps.
W = Amps times Volts. A = W/V, A = 300/120 = 2.5 amps
At present (November 2013), NIS 1,000 would trade at about US$ 280 .
Approx. 280 VRMS. Vpeak * 0.707 = Vrms
About $280 unless the coin is in perfect condition, in which case, it would be worth more.
Need more specifics
280 feet is 85.344 metres.
Well, isn't that just a happy little math problem! To find out what number times 14 equals 280, all you need to do is divide 280 by 14. And when you do that, you'll see that the answer is 20. Just like that, you've discovered the joy of solving equations!
To find five sevenths of 280, you would first calculate one seventh of 280 by dividing 280 by 7, which equals 40. Then, you would multiply 40 by 5 to find five sevenths, resulting in 200. Therefore, five sevenths of 280 is 200.
280 mph = 450.6 kph
A quarter of 280 is calculated by dividing 280 by 4, which equals 70. This is because a quarter represents one-fourth of a whole, so dividing the total by 4 gives us the value of one quarter. Therefore, a quarter of 280 is 70.