Electric Power Calculation Formulas:
1. In a purely DC circuit:
P = U I
P = I^2 R
P = U^2 / R
Where: P — electric power (W), U — voltage (V), I — current (A), R — resistance (Ω).
2. In a single-phase AC circuit:
P = U I cosφ
Where: cosφ — power fac
Gross Profit Calculation Formula
1. Gross Profit = Sales Revenue – Cost of Goods Sold
2. Gross Profit = Operating Revenue – Operating Costs
3. Gross Profit = Selling Price (excl. tax) – Purchase Price (excl. tax) = Product Sales Revenue – Actual Cost at T
Roman numerals for single digits:
Ⅰ-1, Ⅱ-2, Ⅲ-3, Ⅳ-4, Ⅴ-5, Ⅵ-6, Ⅶ-7, Ⅷ-8, Ⅸ-9
Roman numerals for tens:
Ⅹ-10, Ⅺ-11, Ⅻ-12, XIII-13, XIV-14, XV-15, XVI-16, XVII-17, XVIII-18,
XIX-19, XX-20, XXI-21, XXII-22, XXIX-29, XXX-30, XXXIV-34, XXXV-35,
Addit
Tire Pressure Changes with Temperature
For every 10°C rise or drop in temperature, tire pressure increases or decreases by 0.07–0.14 kg/cm². Therefore, pressure must always be measured when the tires are cold. After measuring, be sure to replace the valve cap
Tires are among the most wear-prone parts of a vehicle. When your car has been on the road for six or seven years, or has clocked 60,000–70,000 km, your service technician may recommend replacing the tires—citing severe wear, cracking, and safety concerns. So,
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