Question
In: Chemistry
The following data were collected for a phosphorescent paint being proposed for use in coating highways....
The following data were collected for a phosphorescent paint being proposed for use in coating highways.
| Time (s) | Intensity (lux) |
| 10 | 1505 |
| 20 | 745 |
| 30 | 369 |
| 40 | 183 |
| 50 | 90 |
| 60 | 45 |
| 70 | 22 |
| 80 | 11 |
| 90 | 5 |
| 100 | 3 |
Calculate the half-life for the paint.
What is the intensity of the light at the 2nd half-life?
What is the intensity of the light at the 3rd half-life?
Solutions
queen_honey_blossom answered 11 months agoRelated Solutions
Suppose the following data were collected relating CEO salary to years of experience and gender. Use...
Suppose the following data were collected relating CEO salary to
years of experience and gender. Use statistical software to find
the regression equation. Is there enough evidence to support the
claim that on average female CEOs have higher salaries than male
CEOs at the 0.01 level of significance? If yes, type the regression
equation in the spaces provided with answers rounded to two decimal
places. Else, select "There is not enough evidence."
Salary
Experience
Female (1 if female, 0 if...
Suppose the following data were collected relating CEO salary to years of experience and gender. Use...
Suppose the following data were collected relating CEO salary to
years of experience and gender. Use statistical software to find
the regression equation. Is there enough evidence to support the
claim that on average male CEOs have higher salaries than female
CEOs at the 0.010.01 level of significance? If yes, type the
regression equation in the spaces provided with answers rounded to
two decimal places. Else, select "There is not enough
evidence."
Copy Data
CEO Salaries
Salary
Experience
Male (1...
USE R AND SHOW CODES 2. The following data were collected in a multisite observational study...
USE R AND SHOW CODES
2. The following data were collected in a multisite
observational study of medical effectiveness in Type II diabetes.
These sites were involved: a healthy maintenance organization
(HMO), a university teaching hospital (UTH), and an independent
practice assumption (IPA). The following data display the treatment
regimens of patients measured at baseline by site. Use the data to
test that no difference in treatment regimens across sites. (in
addition, calculate the expected frequency for each cell.)
...
Suppose the following data were collected relating CEO salary to years of experience and gender. Use...
Suppose the following data were collected relating CEO salary to
years of experience and gender. Use statistical software to find
the regression equation. Is there enough evidence to support the
claim that on average male CEOs have higher salaries than female
CEOs at the 0.050.05 level of significance? If yes, type the
regression equation in the spaces provided with answers rounded to
two decimal places. Else, select "There is not enough
evidence."
Copy Data
CEO Salaries
Salary
Experience
Male (1...
Roller Paint Co. reported the following data for the month of September. There were no beginning...
Roller Paint Co. reported the following data for the month of
September. There were no beginning inventories and all units were
completed (no work in process).
Total Cost
Number of Units
Unit Cost
Manufacturing costs:
Variable
$465,000
30,000
$15.50
Fixed
210,000
30,000
7.00
Total
$675,000
$22.50
Selling and administrative
expenses:
Variable
$2.00 per unit
sold
Fixed
$39,000
In the month of September, 28,000 of the 30,000 units
manufactured were sold at a price of $80.00 per unit.
Required:
(a)
Prepare...
Description of Data The data being used for this lab are based on data collected after...
Description of Data
The data being used for this lab are based on data collected
after the 2009 war ended that was between Israel and the Hamas
militias in the Gaza Strip. Responses were obtained from 200
individuals that were exposed to rocket attacks during that period.
The variables in the study include:
ID: Used to indicate the ID# of the
participant
family income: The household income of the
individuals (expressed in thousands)
gender: The gender of the individuals that...
Using the data below, answer items 33 - 40. The following data were collected by a...
Using the data below, answer items 33 - 40.
The following data were collected by a researcher interested in
whether there were differences between teen drivers and middle-age
drivers in terms of their attitudes toward risky driving behaviors.
1, 430 teen drivers and 880 middle-age drivers were surveyed. α =
0.05, df = 879.
Results of the study are as follows:
Risky Behavior
t
p =
Speeding
-1.39
0.17
Drunk Driving
-4.27
0.000
Sleepy Driving
-2.60
0.01
Texting
-6.99
0.000...
The following data were collected for the decomposition of acetaldehyde, CH3CHO (used in the manufacture of...
The following data were collected for the decomposition of
acetaldehyde, CH3CHO (used in the manufacture of a
variety of chemicals including perfumes, dyes, and plastics), into
methane and carbon monoxide. The data was collected at a
temperature at 535 °C.
CH3CHO → CH4 + CO
[CH3CHO]
(mol L-1)
Time
(s)
0.200
0
0.153
0.20 x 102
0.124
0.40 x 102
0.104
0.60 x 102
0.090
0.80 x 102
0.079
1.00 x 102
0.070
1.20 x 102
0.063
1.40 x 102...
1. The following data were collected in a kinetics experiment for the disproportionation of A2 in...
1. The following data were collected in a kinetics experiment
for the disproportionation of A2 in a buffered solution:
3 A2 -> products
The "generic" rate law for the reaction is rate =
k[A2]p
[A2]0
Time for color change
Rate (min-1)
0.10
7.50 minutes
0.20
2.00 minutes
0.30
1.30 minutes
0.40
0.90 minutes
0.50
0.50 minutes
Plot the data according to the method described in this
experiment to determine p, the order of the reaction with
respect to A2. (Hint:...
The following data were collected on the yearly registration for a six sigma seminar at the...
The following data were collected on the yearly registration
for a six sigma seminar at the University of Malaya
Tahun/Year
Pendaftaran/ Registration
1
400
2
600
3
400
4
500
5
1000
6
800
7
700
8
900
9
1200
10
1400
a. Calculate a 3-year moving average to forecast
registration from year 4 to year 11.
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