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Science, physics and Computing A lamp is connected to the lighting circuit and the current is 68 ma Ask for: 1. What is the power of the lamp? 2. Power on for 3 hours a day, 30 days a month, how much power?
P=UI=220*0.068=14.96w
W = Pt = 14.96 * 3 * 3600 * 30 = 0.135 degrees
Ask me about the pressure formula
P = f / S P = liquid density * g * h
I don't understand these two formulas. Can I use them differently?
The first is the solid pressure formula, the second is the liquid pressure formula
When the solid is a regular cylinder, the second formula can also be used for calculation
What is the formula of Physics (about pressure)?
From the definition: pressure is the expression of the size of the force on the unit area of the object formula: P = f / S (pressure = pressure △ force area), that is to say, P = f / S is the definition of pressure formula, P = f / s applicable to solid, liquid, gas; P = ρ GH applicable to liquid (also applicable to uniform density, shape rule of the cylindrical object), P = ρ GH
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