Hydrogen peroxide decomposes to water and oxygen, and the activation energy for this process is 42 kJ/mol. The hydrogen peroxide formed in the biological process is harmful to tissue, but the enzyme catalase catalyzes the decomposition of hydrogen peroxide by lowering the activation energy to 7.0 kJ/mol. Assuming the frequency factor is the same for both processes and independent of temperature, calculate the temperature required for the uncatalyzed decompostion to proceed at the same rate as the enzyme-catalyzed decomposition at 37 degrees Celcius (normal body temperature). Is this a reasonable temperature for a biological organism?

Discuss: (SOLID-STATE PHYSICS) a) The main intrinsic and extrinsic semiconductors. b) The direct gap and indirect gap semiconductors. c) Phonons versus photons. d) Electron-hole generation and recombination. e) LED. f) Photo diode quantum efficiency. g) Photovoltaic and photo resistive (or conductive ) modes. h) Open circuit voltage, short circuit current, power and efficiency of solar cells.An international mathematics and science study obtained Calculus and Physics scores for 93 students within one particular region. A linear regression model was fitted, resulting in the following scatter plot with superimposed least squares line, and summary statistics. Calculus Physics Mean 461 60226 451.63849 Std Dev 98.340618 86.095794 Minimum 263.18 259.66 Maximum 708.62 819.31 800 700- 600- Physics Score 500 - 400 300 300 400 500 600 700 Calculus Score Estimate 5td Error t Statistic P-value Intercept 173.65547 31.43222 5.52 3.110e-7 Slope 0.6022133 0.066615 9.04 2.602e-14 Source df 55 MS Fratio P-value Regression 1 322666.87 322667 7 81.7261 3.110e-7 Error 91 359281.82 3948 Total 681948.69 The student who obtained the maximum score (819.31) for Physics had a calculus score of 641.49. By how much did this student exceed the Physics score predicted by the fitted model? Select one: O 3. 390.26 O b. 667.05 O c. 367.67 O d. 559.97 O e. 259.34Q5. Sketch the crystal structure of (a) NaCl, (b) CsCl, and (c) Diamond, showing the atomic positions and space coordinates. Briefly (in 3-4 sentences) describe each structure type, number of atoms in each cell and discuss the coordination number (number of 15': nearest neighbors for each atom)