Can we achieve 1A current from 1.5v battery cell, if yes for how long?
Normal AA/AAA batteries that have a voltage rating of 1.5V can supply constant 50mA current for a total capacity of 1800-2600 mAh charge and 3.90Wh of energy- Alkaline batteries. (Source: Wikipedia). Now theoretically, if the battery is assumed to be ideal, then it can supply a current of 1A if the resistance across it is 1.5 ohms(I = V/R = 1.5V/1.5 ohms = 1A). So the power consumed is 1.5W and so, it can supply this power for at least 2 hours(t = Energy/Power = 3.9Wh/1.5W = 2.6 hours).This calculation is applicable only when the voltage and current are constant. practically impossible. However, things are not always ideal and the internal resistance of the cell plays a detrimental role here. So, the maximum current capacity can be ascertained by measuring the short circuit current. For a good quality battery, it may range anywhere from 4-7 A which won't last for more than a few minutes or so. Having said that, there is still no clear explanation as to how long can the cell provide the constant current because of the high discharge rate. Any current of more than 0.5A drawn from the cell reduces the voltage considerably and then you see, all the calculation goes in vain. The best way to calculate the time is only via experimentation because standard results are not acceptable here. I hope my answer clears the air a little, though not completely I assume.
If a cell contains a certain text (Eg: Apple), how can I return the entire row to the same row on another Excel sheet?
If you want to go down the macro route then you'll need some sort of loop with a nested IF inside. Do until activecell.value ="" If lcase(activecell.value) like "*apple*" then X=activecell.row Rows(activecell.row).copy worksheets(2).rows(x) End ifActivecell.offset(1,0).selectLoopI don't know if you've used macros before so I've kept it simple but this tests the cell to see if it contains the word apple using wildcard characters either end. By using lcase it converts the contents to lower case for the purpose of the IF statement which helps deal with data entered in either lower or upper case. The variable x stores the row number it finds apple in and copies over to sheet 2 to the same row number. So now you have a couple of options.
How do you copy and paste a formula in Excel while keeping one cell reference constant? E.g. I need to copy =SUM(K18*'STOCK PRICE MASTER'!C62) down to give =SUM(K19*'STOCK PRICE MASTER'!C62), =SUM(K20*'STOCK PRICE MASTER'!C62), etc.
Locked cell references are one of the building blocks of Excel modeling. Without them, you will waste endless amounts of time re-writing formulas.Here is a lesson on the three types of locked cell references and how you can use them to copy & paste your formulas.Let’s define what a locked cell reference does:Locking cell references will anchor formulas in specific ways so that we can copy and past them without having to rewrite them.There are three ways to lock a cell reference:Locked columnLocked rowLocked column & rowHere’s a step-by-step example that demonstrates what happens to each type of locked reference when we copy and paste them.In our example, we’re going to reference cell D2 in all of our formulas (and as a bonus, also SUM D2 - D6 to practice locking a range).Here are our formulas (with the formula outputs) in Excel.Column D is sample data.As you can imagine, D2 is equal to 7 for all of our formulas, no surprises there. And the D2 - D6 range adds up to 31.But here’s where it gets interesting.Now we’re going to copy and paste our formulas (from C2 - C6 to D9 - D13) to see what happens to the cell references.Here is what happened.Let’s break down what happened to each formula:Unlocked: =D2 -> =E9Because this has no locked reference, when we copy and pasted the original formula, the D2 cell reference moved down to row 9 and over to column ESo the output changed to 0 (empty cell)Lock the column: =$D2 -> =$D9The column stayed locked as D, but the unlocked row moved down to row 9So the output changed to 0 (empty cell)Lock the row: =D$2 -> =E$2The column shifted right to column E, but the row stayed locked at row 2So the output changed to 0 (empty cell)Lock the cell: =$D$2 -> $D$2The locked cell did not change at allOutput did not changeLock the range: =SUM($D$2:$D$6) -> =SUM($D$2:$D$6)The locked range did not change at allOutput did not changeNow you’re an expert on all the types of locked cell references!-Short answer to your question:=SUM(K19*’STOCK PRICE MASTER’!$C$62)This will get you the output you want.-If you’re interested in learning all of Excel, check out my business-focused course on mastering the 20% of Excel used for 80% of your work.Become an Excel Power User in 2.5 Hours | UdemyHope this helps!
Cloning question?
Hi: Depends on what you are looking for. Are you trying to identify individuals from the samples? That would be tricky. This is how it goes. If you isolate DNA from the pooled sample, you will get DNA from all the 10 people and there is no way you can distinguish between them. If you have samples from the individuals seperately, you could do a hybridization or DNA fingerprinting to say the the pool has samples from a particular individual.... well, hold on... on second thought, a hybridization will not work since there will obviously be a high homology. And the fingerprinting gels of the polled samples would be all botched up... you will not be able to distinguish bands... not from 10 people. So I would say that you would get very little information from the pooled sample... unless you have a marker gene in one person that is absent in the others, like say a hemophilia gene, or any one of the numerous genetic disorders or other markers that you could look for in the pooled sample. But in all these cases you definitely need DNA samples from the individuals seperately in addition to the pooled sample. And though your question has nothing to do with cloning, it was interesting, nevertheless. Thanks and Cheers!
If all the cells in our body have the same DNA, then why aren't they all the same kind of cell? How can there be different cell types, shapes, and functions?
Because each has a different subset of the whole genome turned on. Some functions are common to all cells - they will have active genes for say tubulin and spectrin, as all will have a cytoskeleton of some ilk for example - so all cells will have those genes 'turned on', though the levels of activity will differ depending on cell type. Other genes are specific to a given cell type - you only get haemoglobin in red blood cells.There is are further layer of controls over how much of a given gene product is made, all cells have tubulin, but some types will have more than others, and these regulators themselves are under genetic control.And the action of all these gene products together detrmine the form and function of the cell. And cells do chnage their gene expression over time as they are newly formed, mature and die. The way skin cells work, dividing in deeper layers and accumulating keratin as they are pushed towards the outside of the organism and eventually becoming dead slabs of keratin and flaking off is one example.An explanation with a video -What Is Cell Differentiation? - Process, Importance & Examples - Video & Lesson Transcript | Study.com These might help, but Wiki articles can be a bit impenetrable at times -Regulation of gene expression Cellular differentiation Trying to work out these processes is a major field of research as getting a fully differentiated cell back down a few steps or even all the way being a stem cell would be a very handy thing to do.http://www.wellcome.ac.uk/About-...
Is it ok to eat a Subway sandwich that has been sitting out all night?
I would not eat that. Anything left at between 41-135 degrees for more than 4 hours can produce pathogen (illness causing bacteria) at a rapid rate. Meat is very prone to doing this. Chicken is the worst so my advice is I would not eat it. If you do you might have a long date with your toilet all night. You can go on ServSafe to check my info. I'm a culinary student and we have to learn food safety in college.