Answer true/false for the following:

1. The power stroke is generated during the contraction-relaxation phase.

2. Reformation of cross bridges occurs during the excitation-contraction phase.

Three identical point charges of charge q = 5 uC are placed at the vertices (corners) of an equilateral triangle. If the side of triangle is a = 3.3m, what is the magnitude, in N/C, of the electric field at the point P in one of the sides of the triangle midway between two of the charges?

In the following clip, Dr. James Dobson, noted Christian author and psycologist, discusses the difference between childish irresponsibility and willfull defiance, and some suggested responses to them. Using animated and real life illustrations, Dr. Dobson explores the oft-frustrating and taxing subject of child discipline. In 150-250 words, provide your reaction to the video clip. Feel free to offer insights from your personal exprience. Feel free also to take issue with any of the video's content, but provide some reason or reasons why. For instance, if you disagree with corporal punishment in any form, or if you promote it, provide some reasons why. I posted the link twice incase one does work. you can also copy and paste in to another browers.

https://www.youtube.com/watch?list=PLxqqo6Ofo2W6v3htHJdsR8C6tSE1OvvaG&feature=player_detailpage&v=R4zp6jtj63s

http://www.youtube.com/watch?v=R4zp6jtj63s

2. Imagine that you are conducting an experiment that compares the effects of drought on photosynthesis in two species in the family Ericaceae: Vaccinium parvifolium (red huckleberry) and Vaccinium oxycoccos (small cranberry), both native to Oregon.

1. What methods (name 2) could you use to measure water stress or availability in this experiment?
   
2. Why might you need to know if these plants have either C3 or C4 photosynthesis? Explain.
   
3. Design a greenhouse experiment that would allow you to address competition between these two species and the effects of drought. Be specific about your hypothesis, design and what variables you would measure.

Descriptions of each major types of epidemiologic study:

- randomized controlled trial,

- cohort,

- case-control

Strengths for 2 Strengths

weaknesses 2 weaknesses

Assuming that the incidence rate of diabetes remains constant, what should happen to the prevalence of diabetes in this cohort over time? Please justify your answer.

Using a hypothetical population of any country of your choice, describe how you will apply the cohort component approach in arriving at a projected population in 2025.

Choose the study design that best fits the following description: Incidence rates of early stage prostate cancer in the United States were compared in every consecutive year from 2005 to 2012. It was discovered that incidence rates had decreased along with PSA testing, following the 2008 U.S. Preventive Services Task Force recommendation against PSA testing for average risk older men

a) Cross Sectional Study

b) Prospective Cohort Study

c) Ecologic Study

d) Case Control Study

e) Randomized Clinical Trial

f) Retrospective Cohort Study

You are tasked with assessing the health department’s intervention program in preventing recurrence of acute alcohol poisoning. This is a program made available for free to anyone interested, and all teens arrested or admitted to the emergency department (ED) for alcohol related issues are made aware of the program. You cross-reference ED records from the past 5 years with records of program participation and school performance. You will assess performance in school as well as additional alcohol-related issues.

(3 pts.) What is the study design for this effort?

Cross-sectional

Prospective cohort

Retrospective cohort

Prospective interventional

Retrospective case-control