= 4x103 kWh = (4x103)(3.6x106) J = 1.4x1010 J Q (m) Estimate the number of trees required for the heating water (family), Nf. = = / = 1.4x1010 / 3.4x109 = 4 Q Nf Qtree Nf Q Qtree (n) Estimate the number of trees required for the heating water (Sydney), NS. population Sydney = 4x106 number of families = 106 = 4x106 NS (o) Assume the trees are grown in a forest which has the shape of square. Estimate the length of one side of this square, LS? area for one tree = (2)(2) m2 A area for all = = (2)(2)(4x106) m2 = 1.6x107 Atrees LS2 m2 = (1.6x107) m = 4x103 m = 4 km LS
Q = 4x103 kWh = (4x103)(3.6x106) J = 1.4x1010 J (m) Estimate the number of trees required for the heating water (family), Nf. Q = Nf Qtree Nf = Q / Qtree = 1.4x1010 / 3.4x109 = 4 (n) Estimate the number of trees required for the heating water (Sydney), NS. population Sydney = 4x106 number of families = 106 NS = 4x106 (o) Assume the trees are grown in a forest which has the shape of square. Estimate the length of one side of this square, LS? area for one tree A = (2)(2) m2 area for all Atrees = LS2 = (2)(2)(4x106) m2 = 1.6x107 m2 LS = (1.6x107) m = 4x103 m = 4 km
PA32A.docx