Question 18M.3.sl.TZ2.a.ii

Any one of these alternatives:

ALTERNATIVE 1

«$\frac{1.3\times {10}^{11}}{76\times {10}^6}$»

1.7 × 10³/1711

ALTERNATIVE 2

1600 × 76 × 10⁶ = 1.2 × 10¹¹ «is less than tensile strength of graphene»

ALTERNATIVE 3

$\frac{1.3\times {10}^{11}}{1600}$ = 8.1 × 10⁷ «is greater than upper end of tensile strength for graphite»

Accept any value in the range 1700–27 083. Answer may be expressed in scientific notation or otherwise.

Accept any value calculated which is less than the graphene tensile strength based on a value chosen from within the 4.8–76 × 10⁶ range.

[1 mark]