math
The Law of Cosines: CosB = (-b^2 + c^2 + d^2)/2cd. cosB=(-1681 + 4225 + 2704)/6760=0.77633 B== 39.1o
math
Law of Sines: sinI/i = sin(O)/o sinI/52 = sin73/32 Multiply both sides by 52: sinI = 52*sin73/32 = 1.55. The sine cannot be > 1: NO SOLUTION.
Algebra
See Related Questions:Fri,8-20-10,6:17pm Your 1st term should be 3x^2.
Science
True. I = V/R.
physics
a. V^2 = Vo^2 + 2g*h h = (V^2-Vo^2)/2g h = (0-(25.5))/-19.6 = 33.2 m.
Physics
A = -7[30o] = -7*cos30 + i(-7)*sin30 A = -6.06 - 3.5i. Q3. tanB = Y/X = -3.5/-6.06 = 0.57756 Br = 30o = Reference angle. B = 30 + 180 = 210o.A = A = -6.06/cos210 = 7[210o].
physics
Wt. = m*g = 8kg * 9.8N/kg = 78.4 N. Fw = 78.4N.[0o] = Force of wagon. Fp = 78.4*sin(0) = 0 = Force parallel to sidewalk. Fv = 78.4*cos(0) = 78.4 N. = Force perpendicular to sidewalk. Fk = u*Fv = 0.3*78.4 = 23.52 N = Force of kinetic friction. Fap-Fp-Fk = m*a. Fap-0-23.52 = 8*0...
Physics
R(Lp) = 270 Ohms each? R(Htr) = 18 Ohms? a. I = 4 * (120/270) = 1.78A. b. I = 6 * (120/270) = 2.67A. c. I = 2.67 + (120/18) = 9.34A .
Physics
a. 9*0.04*300/1000 = 0.108kWh. C = 0.50/0.108 = $4.63/kWh. b. C = 0.07/kWh * 0.108kWh = $0.00756
Algebra
See Related problems: Sun.4-14-13,1:35pm
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