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Q: Is 120 a real number ir an integer?

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Yes, integers can be positive! An integer is basically any whole number, positive ir negative!

The prefix ir- is used to form the word irregular.

The number of significant digits in an integer ending in zeros is always ambiguous. It is not clear whether the number is accurate to the nearest hundred thousands (1 significant digit), ir to the nearest unit (6 sig digs).

Iridium (Ir), has 77 electrons. The atomic number is equal to the number of protons and since Ir is neutrally charged, equal to the number of electrons.

V=IR (from Ohm's Law) So, R=V/I =120 ohms

Ir

It is a prime number.

The simple answer is V=IR => I=V/R => I=120/20 => I=6 amps.

We know that V=IR. This can be re-arranged for R by dividing by I. This leaves R=V/I. Plug in the values V=120 & I=15: R=120/15=8 ohms

V=IR since the load is pure resitance, R=V/I => 120/8 = 15 ohm

18"*18" = 1.5 ft * 1.5 ft = 2.25 sq ft To cover 120 sqft you would require 120/2.25 = 53.33 ir 54 tiles. That answer is correct as a mathematical exercise, but in real life, the number of tiles depends upon the exact dimensions of the 120 sq ft area. It also assumes that all offcuts can be used and that there is no wastage. These are rather unrealistic assumptions so you should allow 5-10% extra.

V=IR, V=120 VOLTS R=30 OHMS I=V/R, I=120/30, I = 4Amps

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