GGR270H1 Lecture : ggr270 lecture oct 12

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rubybee848

18 Oct 2011

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8 1/2 by 11 paper sheet cheat sheet (double sided) No mathematical questions on the multiple choice part. Ex. number of variables, define what scale of measurement they were measured at. Ex. difference between a median and a mean. Ex. if the result shows a skewed result - do we use a median or the mean? (skewness formula) What does covariance give you and why is it important - it gives you the direction (+ or -) Variance is the sum of squared differences around the mean. Covariance - we are not squaring because we want the direction. Probability focuses on the occurrence of an event where one of several possible outcomes could result outcome are (and must be) mutually exclusive can be thought of as frequency of an event occurring relative to all other outcomes. Example examine the record of wet and dry days over a 100 year period.

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13. After watching the video "Cultural Appropriation vs. Appreciation" answer the following question. Why is it important to understand the difference between cultural appreciation & cultural appropriation? 3+ sentences

If you need help starting your response, use the following sentence frames:

It's important to understand the difference between cultural appreciation and appropriation because .
I think because the world is , it's that people understand the difference between cultural appreciation and appropriation.

isaiahhh810

What is the difference between an orbit and an orbital?

a) There is no difference between an orbit and an orbital. Both terms describe a fixed path at a definite distance from the nucleus in which the electron revolves around the nucleus.

b) An orbital is a fixed path at a definite distance from the nucleus in which the electron revolves around the nucleus. An orbit is a region of space around the nucleus where the probability of finding an electron is at a maximum.

c) An orbit is a fixed path at a definite distance from the nucleus in which the electron revolves around the nucleus. An orbital is a region of space around the nucleus where the probability of finding an electron is at a maximum.

d) There is no difference between an orbit and an orbital. Both terms describe a region of space around the nucleus where the probability of finding an electron is at a maximum.

crimsonhornet860

When the heart pumps blood into the aorta, the pressuregradient-the difference between the blood pressure inside the heartand the blood pressure in the artery-is an important diagnosticmeasurement. A direct measurement of the pressure gradient isdifficult, but an indirect determination can be made by measuringthe Doppler shift of reflected ultrasound. Blood is essentially atrest in the heart; when it leaves and enters the aorta, it speedsup significantly and-according to Bernoulli's equation-the pressuremust decrease. A doctor using ultrasound of 2.5 MHz measures a 5400Hz frequency shift as the ultrasound reflects from blood ejectedfrom the heart.
Part A
What is the speed of the blood in the aorta? Assume that the speedof sound in human body is 1540 m/s
A:1.7 m/s
***Part B
What is the difference in blood pressure between the inside of theheart and the aorta? Assume that the patient is lying down and thatthere is no difference in height as the blood moves from the heartinto the aorta.

GGR270H1 Lecture : ggr270 lecture oct 12

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