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Rebecca
Geology please help?
What Do You Think?
Because of the earthquake threats from the San Andreas fault, the city of San Francisco has rigorous building codes requiring that buildings be designed to withstand earthquakes. On the other side of the United States, however, the building codes are less rigorous. An earthquake in Virginia in August 2011 was felt along most of the east coast, prompting questions about whether existing building codes should be changed to meet the more rigorous San Francisco standards. But meeting the San Francisco standards makes construction a lot more expensive in San Francisco than it is in New York. Imagine you had to make a recommendation to the New York City Council about whether it should or should not adopt San Francisco building codes. Using what you’ve learned in this chapter, explain what your recommendation would be, and why.
3 AnswersSan Francisco1 month agoGeology please help?
San Francisco and Los Angeles are on opposite sides of the San Andreas fault. If the San Andreas fault for the past 30 million years has been undergoing offset at the rates that you calculated in Part 2.d., how many years will it take before the two cities are directly opposite each other?
a. 20 Myr
b. 45 Myr
c. 72 Myr
d. 12 Myr
2 AnswersEarth Sciences & Geology1 month agoGeology please help?
Assuming a constant rate of movement for the past 30 million years, what is the approximate rate of offset?
a. 37 km/Myr = 370 mm/yr
b. 10 km/Myr = 10 mm/yr
c. 10 km/Myr = 100 mm/yr
d. 37 km/Myr = 37 mm/yr
Desktops1 month agoGeology please help?
In the figure above, which direction is Los Angeles moving relative to San Francisco?
a.
Los Angeles is moving northwest toward San Francisco.
b.
Los Angeles is moving northeast toward San Francisco.
c.
Los Angeles is moving southeast away from San Francisco.
d.
Los Angeles is moving southwest away from San Francisco.
2 AnswersSan Francisco1 month agoGeology please help?
Assuming a constant rate of movement for the past 30 million years, what is the approximate rate of offset?
a. 37 km/Myr = 370 mm/yr
b. 10 km/Myr = 10 mm/yr
c. 10 km/Myr = 100 mm/yr
d. 37 km/Myr = 37 mm/yr
Desktops1 month agoGeology please help?
Now do the same for the 30-Ma dike. Approximately how many kilometers has the marble been offset?
a. 300 km
b. 2,200 km
c. 1,100 km
d. 7,700 km
Earth Sciences & Geology1 month agoGeology please help?
The geologists have proved that the faulting began almost immediately after the granite formed and continues today. Assuming that the plates moved at a constant rate for the past 50 million years, what is the approximate rate of offset?
a. 6.2 km/Myr = 62 mm/yr
b. 6.2 km/Myr = 6.2 mm/yr
c. 22 km/Myr = 2.1 mm/yr
d. 22 km/Myr = 21 mm/yr
1 AnswerEarth Sciences & Geology1 month agoGeology please help?
Measure the amount of offset of the 50-Ma granite body. Approximately how many kilometers has the granite body been offset?
a. 7,700 km
b. 310 km
c. 1,050 km
d. 2,200 km
2 AnswersEarth Sciences & Geology1 month agoGeology, please help!!?
(Q005) Part 1.b. Today the Atlantic Ocean is about 5,700 km wide at the latitude of Boston. At one time, however, there was no Atlantic Ocean because the east coast of the United States and the northwest coast of Africa were joined in a huge supercontinent. The Atlantic Ocean started to form "only" 185 million years ago, as modern North America split from Africa and the two continents slowly drifted apart in a process called seafloor spreading. Assuming that the rate of seafloor spreading has been constant, at what rate has North America been moving away from Africa? Give your answer in millimeters and kilometers.
a. 0.0325 mm/yr; 0.0000000325 km/Myr
b. 0.0325 mm/yr; 0.0325 km/Myr
c. 30.8 mm/yr; 0.0000308 km/Myr
d. 30.8 mm/yr; 30.8 km/Myr
1 AnswerEarth Sciences & Geology2 months agoGeology please help me!!?
(Q004) Part 4.a. Observations of modern mountain belts suggest that ranges erode at rates of 2 mm per 10 years. At this rate, how long would it take to erode the Himalayas down to sea level?
a. 4.4 × 104 yr
b. 4.4 × 107 yr
c. 4.4 × 106 yr
d. 4.4 × 103 yr
1 AnswerEarth Sciences & Geology2 months agoGeology, please help!!?
(Q003) Part 3.a. Evidence shows that there were once Himalayan-scale mountains in northern Canada, in an area now eroded nearly flat. If the Earth were only 6,000 years old, as was once believed, how fast would the rate of erosion have had to be for these mountains to be eroded to sea level in 6,000 years? Give your answer in meters and millimeters.
a. 682 m/yr; 682,000 mm/yr
b. 0.682 m/yr; 681 mm/yr
c. 1.47 m/yr; 1,470 mm/yr
d. 0.00147 m/yr; 1.47 mm/yr
3 AnswersEarth Sciences & Geology2 months agoGeology, please help!!?
(Q002) Part 2.a. The Himalayas now reach an elevation of 8.8 km, and radiometric dating suggests that their uplift began about 45 million years ago. Assuming a constant rate of uplift, how fast did the Himalayas rise? Give your answer in kilometers, meters, and millimeters.
a. 5.11 × 106 km/yr; 5.11 × 109 m/yr; 5.11 × 1012 mm/yr
b. 5.11 × 103 km/yr; 5.11 × 106 m/yr; 5.11 × 109 mm/yr
c. 1.96 × 10–7 km/yr; 1.96 × 10–4 m/yr; 1.96 × 10–1 mm/yr
d. 1.96 × 10–1 km/yr; 1.96 × 102 m/yr; 1.96 × 105 mm/yr
2 AnswersDesktops2 months agoGeology, Please help me!!?
(Q001) The following questions will give you a sense of the rates at which uplift and erosion take place. We will assume that uplift and erosion do not occur at the same time—that mountains are first uplifted, and only then does erosion begin—whereas the two processes actually operate simultaneously.
Part 1.a. If mountains rose by 1 mm/yr, how high would they be (in meters) after 1,000 years? 10 million years? 50 million years?
a. 1,000 yr: 1 m; 10 million yr: 10,000 m; 50 million yr: 50,000 m
b. 1,000 yr: 10 m; 10 million yr: 100,000 m; 50 million yr: 500,000 m
c. 1,000 yr: 1,000 m; 10 million yr: 10 million m; 50 million yr: 50 million m
d. 1,000 yr: 100 m; 10 million yr: 1 million m; 50 million yr: 5 million m
1 AnswerEarth Sciences & Geology2 months agoPlease help me!!!?
Math problem: A dentist's office is being carpeted. The cost to install the new carpet is $100 plus $11 per square foot of carpeting.
(a)
Determine a linear function that predicts the cost y (in dollars) to carpet an x-square foot office.
y =
(b)
Use this function to determine the cost (in dollars) to carpet 299 square feet of floor space.
$
1 AnswerHomework Help4 months agoPlease help me!!!!?
(not a linear equation) Math problem: An automotive engineer studied the effect of car weight in tons on fuel efficiency, which is measured in miles per gallon (mpg). The data from two cars in the study showed that a 2 ton car had a fuel efficiency of 35 mpg and a 2.5 ton car had a fuel efficiency of 31 mpg. Find a linear model that gives the fuel efficiency E (in mpg) of a car as a function of its weight w (in tons).
E =
Use the model to find the fuel efficiency (in mpg) of a car that weighs 3 tons.
mpg
2 AnswersMathematics4 months agoPlease help me!!!!!!!!?
Math problem: Evaluate the function to answer the question.
The time t in seconds it takes to download a file from a server is a function of the size s, in gigabytes, of the file and is given by
t = f(s) = 0.4s.
(a)
Find the ordered pair to complete the following table.
s t (s, t)
20 8 (20, 8)
40 16 (40, 16)
60 (answer) (Answer)
80 32 (80, 32)
100 40 (100, 40)
(b)
Write a sentence that explains the meaning of the ordered pair
(80, 32)
in the context of this problem.
It takes seconds to download a(n) gigabyte file.
(c)
Graph the function for s between 20 gigabytes and 100 gigabytes.
Mathematics4 months agoMath: Please help me!!!!!!!!!!!!!!!!?
Math problem: An oceanographer measured the length, in meters, of a deepwater wave and its speed, in meters per second. The results are shown in the following table.
Wave Length (m) Speed (m/s)
100 14.5
125 13.4
130 15.9
175 16.9
210 21.8
350 24.5
400 24.8
(a)
Find the equation of a linear regression line for the data where wave length is the independent variable, x, and speed is the dependent variable. (Round your numerical values to two decimal places.)
ŷ =
(b)
Using the equation from part (a), estimate the speed (in meters per second) of a wave that is 200 m long. (Round your answer to one decimal place.)
m/s
Mathematics4 months agoMath. Please help me!!!!!!?
Math problem: An automotive engineer studied the effect of car weight in tons on fuel efficiency, which is measured in miles per gallon (mpg). The data from two cars in the study showed that a 2 ton car had a fuel efficiency of 35 mpg and a 2.5 ton car had a fuel efficiency of 31 mpg. Find a linear model that gives the fuel efficiency E (in mpg) of a car as a function of its weight w (in tons).
E =
Use the model to find the fuel efficiency (in mpg) of a car that weighs 3 tons.
mpg
1 AnswerMathematics4 months agoPlease help me!!!!!?
Math problem: Evaluate the function to answer the question.
The time t in seconds it takes to download a file from a server is a function of the size s, in gigabytes, of the file and is given by
t = f(s) = 0.4s.
(a)
Find the ordered pair to complete the following table.
s t (s, t)
20 8 (20, 8)
40 16 (40, 16)
60 (answer) (Answer)
80 32 (80, 32)
100 40 (100, 40)
(b)
Write a sentence that explains the meaning of the ordered pair
(80, 32)
in the context of this problem.
It takes seconds to download a(n) gigabyte file.
(c)
Graph the function for s between 20 gigabytes and 100 gigabytes.
Mathematics4 months agoMath, Please help me!!!!!?
Math problem: An oceanographer measured the length, in meters, of a deepwater wave and its speed, in meters per second. The results are shown in the following table.
Wave Length (m) Speed (m/s)
100 14.5
125 13.4
130 15.9
175 16.9
210 21.8
350 24.5
400 24.8
(a)
Find the equation of a linear regression line for the data where wave length is the independent variable, x, and speed is the dependent variable. (Round your numerical values to two decimal places.)
ŷ =
(b)
Using the equation from part (a), estimate the speed (in meters per second) of a wave that is 200 m long. (Round your answer to one decimal place.)
m/s
3 AnswersMathematics4 months ago