#1. How does a topographic map help an architect? A It shows where to build a structure.

B It shows how to build a structure.

C It shows the elevation of a building site.

D It tells the builder how the architect wants the parking lot.

#2. How do plants help in erosion control?

A Plant roots hold the soil in place.

B Plants are pretty and keep the neighborhood from being ugly.

C Plants don't help in erosion control.

D Plants allow the soil to float in the rainwater.

#3. The term deposition is used in paragraph 4. Based on context, this term means _.

A laying down of sediments

B erosion control

C silt fences

D landslides

#4. How do satellite views help scientists?

A They give scientists the ability to predict catastrophic events.

B Satellite cameras are not good enough to really be helpful.

C They allow scientists to know where valuable minerals are located.

D They allow scientists to see changes as they happen.

Fft review: linspace, fs, fftshift, nfft 1. generate one second of a cosine of w,-10hz sampled at f, = 100hz and assign it to x. define a tt as your time axis 2. take 64 points fft. 3. as you remember, the dft (which the fft implements) computes n samples of s2t where k-0,1,2, n -1. plot the magnitude of this 64-points fft at range 0 to 63, what do you think of this graph? 4â·to get the x-axis into a hz-frequency form, plot this 64-points fft between-50 to 50 (the 100hz sampling rate) and have n-points between them. 5. according to your figure, what frequency is this cosine wave at? 6. remember that the fft is evaluating from 0 to 2ď€. we are used to viewing graphs from-ď€ to ď€. therefore, you need to shift your graph. 7. now according to your shifted graph. what frequency is this at? 8. note that the spikes have long drop-offs? try a 1024-point dft. note that the peak is closer to 10 and the drop-off is quicker. although, now sidelobes are an issue

Which of the following is not a characteristic of s waves? a. travel slower than p waves. b. cannot be detected in locations more than 105° from an earthquake’s epicenter. c. travel through solids and liquids. d. only affect coastal regions.

Suppose astronomers built a 140-meter telescope. how much greater would its light-collecting area be than that of the 10-meter keck telescope? express your answer using two sign