Physics
Eff. = Po/Pi = 0.55 360/Pi = 0.55 Pi = 360/0.55 = 654.55 Watts = Power in Energy Wasted = 0.65455kW * (45/60)h = 0.491 kWh. Multiply Energy wasted by the cost per kWh. I don't know what 14.8p mean.
Math
X = Smaller number. (2x+6) = Larger number. (2x+6) + x = 2((2x+6) - x) 3x+6 = 2(x+6) 3x+6 = 2x+12 3x-2x = 12-6 X = 6 2x+6 = 2*6 + 6 = 18.
algebra
1. x+2y = 6 5x+3y = 2 Multiply both sides of Eq1 by -5 and add the 2 Eqs: -5x - 10y = -30 +5x + 3y = 2 -7y = -28 Y = 4. In Eq1, replace Y with 4: x + 2*4 = 6 X = 6-8 = -2. 2. Multiply both sides of Eq2 by 4 and add the 2 Eqs. 3. Multiply both sides of Eq2 by -6 and add the 2 E...
Math
a = (V-Vo)/t = (900-0)/2 = 450 Ft/s^2.
Geometry
1. x/2 = 2x/3 - 8. 2. x + 8 = 15. 3. x + 4 = 9. 4. 2x-5 = 35. 5. 10x = -80.
Maths
As=(60/360) * Ac = (60/360) * 3.14*10^2= 52.33 cm^2.
math
See previous post.
math
See previous post.
math
V = 103Ft/s[34o] + 22Ft./s[0o]. Xo = 103*cos34 + 22*cos0 = 107.4 Ft/s. Yo = 103*sin34 + 22*sin(00 = 57.6 Ft/s. tan A = Y/X = 57.6/107.4 = 0.53628 A = 28.2o. V = Xo/cosA = 107.4/cos28.2 = 121.6 Ft/s.[28.2o] Y^2 = Yo^2 + 2g*h hmax = ho + (Y^2-Yo^2)/2g hmax = 3 + (0-(57.6)^2)/-64...
math
X Ones. (X+2) Tens. (X-5) Hundreds. X + (X+2) + (X-5) = 18 3x + 2 - 5 = 18 3x = 21 X = 7 Ones. X+2 = 9 Tens. X-5 = 2 Hundreds. N = 297.
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