Latest Posted Questions - Sciences

Q:

1. Two of the dependent variables of this study are: “Multiple choices” and “Free Recall”. Describe how EACH of these dependent variables was defined operationally. 2. On p. 244, the “Multiple choices” results are presented. Here are the results of one t test: “The comparison of the control versus high-distraction group was significant, t(44) = 2.685, p < 0.05, Cohen’s d = .92.” a) Identify what type of t test was conducted (one- or two-tailed test; independent or paired test?) b) Describe what “p value” represents (in other words, define “p value”) and the conclusion that should be drawn from it. Be specific. c) What additional information (other than that provided by the p value) is provided by presenting the Cohen’s d (a measure of effect size, that here has a high value)? In other words, what conclusion (other than that provided by the p value) can be drawn from this high effect size? 3. In the discussion section, the authors mention that their sample size is limited. Do you think that the sample size was sufficient? Your answer must be supported by arguments related to the study design and its statistical results. Specifically, your answer must define and address POWER. 4. Imagine that most participants assigned to the condition “High Distraction” had an attention deficit disorder, but NO participant assigned to the condition “Control” did. a) How would this impact the internal validity of the study? b) How would this impact the probability of committing an error in the conclusion? Define what kind of error would be impacted.

Q:

Choose a specific health concern or health need as the focus of your hypothetical health promotion plan. Then, investigate your chosen concern or need and best practices for health improvement, based on supporting evidence. Bullying. Teen Pregnancy. LGBTQIA + Health. Sudden Infant Death (SID). Immunizations. Tobacco use (include all: vaping e-cigarettes, hookah, chewing tobacco, and smoking) cessation. ( MUST address all tobacco products). Create a scenario as if this project was being completed face-to-face. Identify the chosen population and include demographic data (location, lifestyle, age, race, ethnicity, gender, marital status, income, education, employment). Describe in detail the characteristics of your chosen hypothetical individual or group for this activity and how they are relevant to this targeted population. Discuss why your chosen population is predisposed to this health concern or health need and why they can benefit from a health promotion educational plan. Based on the health concern for your hypothetical individual or group, discuss what you would include in the development of a sociogram. Take into consideration possible social, economic, cultural, genetic, and/or lifestyle behaviors that may have an impact on health as you develop your educational plan in your first assessment. You will take this information into consideration when you develop your educational plan in your fourth assessment. Identify their potential learning needs. Collaborate with the individual or group on SMART goals that will be used to evaluate the educational session (Assessment 4). Identify the individual or group's current behaviors and outline clear expectations for this educational session and offer suggestions for how the individual or group needs can be met. Health promotion goals need to be clear, measurable, and appropriate for this activity. Consider goals that will foster behavior changes and lead to the desired outcomes.

Q:

The surface tension of a liquid may be measured using the Pendant Drop Experiment. In this experiment a drop of surface tension, o, and density, p is dangling statically from a fine capillary (small diameter) tube of radius R. The "light-bulb" shape of the droplet is due to competing gravitational and h(=) curvature forces. We study the water-air surface tension in STP conditions, as the fluid is injected precisely through an orifice of R, = 1mm. Ra a) Find the liquid pressure at the drop apex (z = 0). For this purpose, you may assume the droplet is spherical close to the apex (i.e., neglect the meniscus influence and use Ra). b) Write the stress balance at the interface for the problem and derive the differential equation and boundary conditions for the shape of the drop. Write every assumption you are taking. c) Assuming Ra/R, = 2, plot the shape of the pendant drop. Instructions: 1. Find the air and water properties at STP conditions 2. Solve the ODE found in (b) numerically. Please attach your code to your submission! 3. Write every assumption you are taking. d) We seek to investigate the influence of the surface tension on the drop shape. For that aim, artificially increase the standard surface tension by 5%, 10%, 25%, and 50%, and correspondingly plot the new shapes. e) A pendent drop occasionally breaks loose. This occurs when its weight exceeds the capillary force that holds it in place. Estimate the Ra/R, ratio for which the drop will break loose. (Hint: estimate the force balance on the drop, between its apex and neck.)

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