Homework Help

So I used a Fitbit Versa to measure my heart rate for a science experiment and I need to record the uncertainties in my report. How can an uncertainty for measuring the heart rate with a Fitbit be determined? Is it something I can calculate with my data? Thanks.

3x=21 Solve for x Can you please explain to me, because I missed this topic when we did in school. Thanks

this is not an assignment I was given but it is something I've been thinking about and I don't know how to solve it I want a list of equations that use two variables that when I plug in any whole number value for the two variables they will give me solutions to the equation (a^2) + (b^2) = 2(c^2) an example of what I want is the Pythagorean triples. (a^2) + (b^2) = c^2 a = 2mn b = (m^2) - (n^2) c = (m^2) + (n^2) can someone help me with this problem?

Good day to everyone reading this. Thanks for your time. I've got this question here (more like an research assignment) which requires me to predict further values in a given set of values. I've attached a picture for a better understanding. The data is the cases of influenza in a country over the years. There's values missing in from May, 2019 onwards. We have to use the previous set of data, come up with a "Prediction model" and use that to predict the values until end of 2019. The thing is, our teacher is very incompetent, and only told us to use "polynomials from the graphs we make in excel" and use that... Anyone got any clues/hints on how i could come…

Hi. Need help with Defining energy audit for pumps . Help please.

Explain the 3 main branches of philosophy

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Please list formula also! Thank you!

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How to find a mode and Median a of this sequence:{5,8,6,4,5,3,5}Can you help me with this problem, because I didn't get it when we did it in class.Thank-you

I don't know what to do for question ii) .Help me please I'm lost, I don't know where to begin with. I have an exam tomorrow on this topic, so I require a bit of help because I had been sick a lot , so I missed a lot of school, so I missed the topicThanks for answering the question

Hi! For class, we are coming up with an idea and we have some questions: Are there any bacteria stains that are safe for consumption? Is there any difference in DNA between E. Coli and Salmonella? IF so, is there a stain that can detect these 2 bacterias and come out with a different colour for each bacteria detected? Is bacteria stain reusable? For example, if i were to wash it, would i be able to use it again?

Hi all,I have experimental nuclear magnetic resonance data that describe T2-relaxation of the nuclei in the sample of interest. The experimental points obey bi-exponential dependence: I = I1*exp(-t/T2_1) + I2*exp(-t/T2_2), where I is current intensity, I1 and I2 are intensities which represent fractions of two T2 components - T2_1 and T2_2. The purpose is to calculate T2_1 and T2_2. To calculate T2_1 and T2_2, I fit bi-exponential equation mentioned above to experimental data points. But in order to ensure that calculated T2 values are true, I'd like to build semilog graph. For this, I take natural logarithm of experimental intensities, and thus the vertical axis in the g…

I really need someone to start me off with my practical questions. 1. Buffer will be 100ml of 0.25 M Tris buffer with a ph of 8.0. Write out the chemical equation for this buffer. Identify which species is the conjugate acid and conjugate base. 2. For this buffer, calculate the ratio of the base to acid using the Henderson-Hasselbach equation. I don't really know where to begin to be honest. Any help/ info would be so appreciated!

Hi Everyone, I cant get my head around this one, This isn't the question in the assignment but if I knew this one it would help me with answering it. How can you apply bernouilli's equation to solve simple problems associated with pipe and ductwork systems and devices? Any help would be greatly appreciated!

The price in the shop is $ 20 by how much % you how to reduce the price to get 15 So 20= to 100%. if you take away 20 from 15 you get 5 So if you take 100-5 =95 So is it 95% if it is wrong explain please.

In school we learned chemical world and we came across , the word atom . Can anyone define please what atom means? Please Thanks in advance

3x=15 Can you help me with this question please So ,we did it in class but I need a help with them, because I don't know what to do next.Can anybody explain the method so I know it the next time.

I am lost on this. I know the equation 1/DI + 1/DO = 1/F but I don't know how it applies to this. Thanks A 1.9 cm-tall object stands in front of a converging lens. It is desired that a virtual image 2.7 times larger than the object be formed by the lens. How far from the lens (in cm) must the object be placed to accomplish this task, if the final image is located 10 cm from the lens?

Quadrilateral ABCD is inscribed into a circle. AB is a diameter of this circle. BC crosses AD in point E. E is outside the circle. EH is a perpendicular from E to AB. EH crosses CD in point F. G is a middle of CD. Prove that angles ABG and AFD are equal.

A man's income is N 180 000 per anum. He is allowed a tax-free income in the following: personal allowance N 72 000, child allowance N 4 500 for each child under 18 years for a maximum of 4 children, dependent relatives allowance to a maximum of N 18 000. Calculate the amount of tax the man will pay if has 5 children under 18 years and the taxable income is 10% for the first N 20 000, 15 % for over N 20 000 and up to N 40 000, 20% for over 40 000 and up to N 60 000, and 25% for over N 60 000. Here is my work: Man's income = N 180 000 Personal allowance =N 72 000 Child allowance (4 children maximum) = N 4 x N 4 500 = N 18 000 Dependent relatives allowances = N 18 …

39-year-old woman attended her GP complaining of upper abdominal pain. When questioned about the history of the pain, she explained that it became worse after meals and it had been persistent for some time. When asked for any other unusual symptoms, recent weight loss was noted and she explained that she had been experiencing unusually greasy stools, even though she had not changed her diet. When the GP looked further back into the patient’s records, he noted a history of alcohol abuse. Upon questioning, the patient admitted that although she had reduced her intake, she was still having a ‘glass or two’ of wine every evening. The GP requested non-fasting bloods to be…

I am clueless on this one.

Hi, I'm in 12th grade and for my senior project I am doing an observation on the effects copper would have on plant growth. I have used copper sulfate to create increasing concentrations of copper in which I used to water my test plants. What I need some help on is whether copper sulfate can or should have been used in order to test the effects that copper has on the plants. After further research of lately, I found that copper sulfate not only has copper but I've read that it contains sulfur as well. I believe this would ruin the purpose of my experiment as the sulfur may effect the plants. I would appreciate any assistance from someone who has more knowledge …