KM unit 7

The graph below shows the absorption spectra of a substance to determine the optimal wavelength. Based on the graph shown below, what value is considered the optimal wavelength for Molecule 1 to measure absorbance? Absorption 0.851, 0.800 0.600 0.400 A 0.0 251.97 300.00 0.851 0.400 280 395 400.00 500.00 Wavelength, nm 600.00 696.03

On average, a pair of running shoes can last 18 months if used every day. The length of time running shoes last is exponentially distributed. What is the probability that a pair of running shoes last more than 15 months? Eighty percent of running shoes last at most how long if used every day?

A sphere (emissivity=0.42) of radius 25 cm is at 27 deg C. It's placed in a room with a temperature of 2 deg C. Match each item to a choice: How long will it take for the sphere to lose 1x10^6 Joules of energy? What is the rate of heat energy entering the sphere? Choices: : 151.4981 W : 8.236 hrs : 6.832 hrs : 44.5303 W : 3.268 hrs : 6.238 hrs : 106.9678 W

1. Since experimentations are always subject to errors, what techniques are employed to neutralize the effects of these errors in the accuracy and validity of the experiment? 2. Why is the "factorial experiment" better in any way than a "one-factor-at-a-time" approach? 3. True or False: As soon as the experimental data (measurements) are obtained, the experimenter can already proceed with the usual significance testing. Explain. 4. What is "hypothesis testing"? How is it performed? 5.What makes ANOVA a powerful tool in hypothesis testing? What happens if you use a 2k full Factorial design to explore a set of variables which is known to have a non-linear response? 6. When is the addition of center points to a 2k full factorial design beneficial? Give a particular case that warrants its use. 7. In practical terms, explain how a LOW p-value connote SIGNIFICANCE (Recall that the smaller the p-value is, the more significant the factor becomes)?

5 example of chemical hazard 5 example of physical hazard 5 example of erginimic hazard 5 example of biological hazards

True or False High-tech research in Singapore includes the elusive but all-consuming invention that drove Nicola Tesla - Wireless Power Transfer.

What is an example of experimental uncertainty?

What do you mean by reliability method of design? What is the role of statistics and probability in designing for reliability?

7. A load cell is calibrated in an environment at a temperature of 21°C and has the following deflection/load characteristic: Load (kg) Deflection (mm) 50 100 150 200 0.0 1.0 2.0 3.0 4.0 When used in an environment at 35°C, its characteristic changes to the following: Load (kg) Deflection (mm) 50 100 150 200 0.2 1.3 2.4 3.5 4.6 (a) Determine the sensitivity at 21 and 35°C. (b) Calculate the total zero drift and sensitivity drift at 35°C. (c) Hence determine the zero drift and sensitivity drift coefficients (in units of um/°C and (um per kg)/(°C).

Why is calibration of instruments important in the engineering field? Why is calibration of instruments important in the engineering field?

Using the value of 0.55s ± 0.17s calculate the value for g and the value for uncertainty in g. Using the formula provided in image.

4. In a study to estimate the proportion of residents in a certain city and its suburbs who favor the construction of a nuclear power plant, it is found that 450 of 1000 urban residents favor the construction while only 240 of 800 suburban residents are in favor. (a) Is there a significant difference between the proportion of urban and suburban residents who favor construction of the nuclear power plant? Test with p-value at a = 0.05. (b) Construct a 95% confidence interval for the difference of favor proportions between urban residents and suburban residents and test if there is a significant difference between the proportion of urban and suburban residents who favor construction of the nuclear power plant. (You need to explain how you make the conclusion). (c) By using critical region(s) test if there is a significant difference between the proportion of urban and suburban residents who favor construction of the nuclear power plant. |

kindly solve this problem with table from excel thank u so much