1. Design Solutions A camping gear company is planning to manufacture a portable solar oven that has a footprint of 40 cm × 40 cm (length × width). The company has hired you to consult on the design. What suggestions would you make to help ensure that thermal energy transfer in the solar oven is maximized? Use the simulation data from the virtual lab to support your answer.

2. Evaluate Information: In your simulated experiments, you tested the effects of four different design variables on the performance of a solar oven: window size, box height, box thickness, and the use of reflectors. Identify two other variables that you think affect the performance of a solar oven. For each variable, make a prediction about its effect on the oven’s maximum temperature.

Intersecting secant-tangent theorem states that if a tangent segment and a secant segment are drawn to a circle from an exterior point, then the square of the measure of the tangent segment is equal to the product of the measures of the secant segment and its external secant segment.so to break it down: 1. pq acts as the tangent and ps as the secant with an intersection at p.sr = 21rp = 3x + 3pq = 4x + 4following to equation: tangent squared = the two segments multiplied by each otherso (4x + 4) ^ 2 = (3x + 3) • (21) simplifies to 16x^2 - 31x - 47 = 0 or (16x - 47)(x + 1) x = -1 or x = 47/162. pq acts as the tangent and ps as the secant with an intersection at p (again! )sr = 16rp = xpq = 15(15) ^ 2 = 16 • x225 = 16xx = 225/163. the interesting chords are proportional to each other so a ratio is possible to set up: ap dp 10 3 + x = = —— = pc pb 8 xcross multiple to get 10x = (3 + x)(8)x = 12

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