Homework Help

Hey guys, we just started learning "counting" and I have a few questions about my homework. 1) How many 5-digit integers start and end with an odd digit? I figure 99999 is the highest numbers so it would go like this. (5)(9)(9)(9)(5) because for the first number you have 5 choices (1,3,5,7,9), the 2nd,3rd,4th numbers have 10 choices (0,1,2,3,4,5,6,7,8,9) and the last has the same amount of choices as the first number. So I got 25,000 as my final answer. That one wasn't hard. 2)How many 5-digit integers begin with an odd digit, end with an odd digit, and consist of 5 different integers? Again, 99999 would be highest number possible if they didn't have t…

Does anyone know about the digestive and excretory systems for a non-ruminant (monogastric) animal?

I'm trying to determine the (theoretical) end-point for a titration of paracetamol with KOH. So I need to work out the volume of 0.1M KOH required to neutralise 125mg of paracetamol. Information about the practical this is based on: This 125mg of paracetamol tablet is crushed and dissolved in 100cm3, then 25cm3 of this solution is pipetted into a beaker. Titrate this with 0.1M KOH and find the end point. I have a method of doing this but I'm not sure it's correct: 0.125g/ 151.09gmol-1 = 8.27*10-4 mol paracetamol in 100cm3 solution. 8.27*10-4 mol/ 4 = 2.07*10-4 mol paracetamol in 25cm3 solution (the 25cm3 pipetted into a beaker). We are told th…

Could you guys help me get started on this question? The vertical chord with the equation x=a through the focus (a,0) - the latus rectum- of the parabola with the equation y2=4ax Show that the tangents which pass through the end points of the latus rectum intersect at (-a,0)

this is part of my assignment, i dont really mind if i dont get the answer, but i just want to know how to even work it out/do the calculations :/ can any1 just show the calculations with examples please? any help please? A processor has 24 registers, uses 8-bit immediates, and has 36 different instructions (corresponding to 36 operation codes) in its instruction set. These 36 instructions are classified into 4 types as listed below: Type-A: takes 2 source registers, uses 1 destination register; Type-B: takes 1 source register, uses 1 destination register; Type-C: takes 1 source register, 1 immediate, uses 1 destination register; Type-D: takes 1 immediat…

I have -103.44.... how do I convert this in twos complement? in the typical regular way like I do with the numbers without fraction?

We have X and Y,each represented with 2 bits in one's complement.Write down the expression of a Boolean function F which takes the True Value only if X=-Y.... how to do this?Please help I need this ...

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Convert the following number from the representation in hexadecimal according to IEEE P754 standard to the decimal system. The number is C4980000.. Now I know that IEEE P754 is related to the floating point,I see no floating point here?

I have to convert 101.012211010 which is in base 10 to base 2,and the error should be in maximum 1%...

I have the number 4.281.000 miliards ,how many bits are needed to represent this number in binary? just tell me where to start ?

18 The following two experiments are carried out with anhydrous potassium chloride and observations X and Y are made at the end of each experiment. Concentrated sulfuric acid is added to the potassium chloride and the fumes produced are bubbled into aqueous potassium iodide solution - observation X. The potassium chloride is dissolved in aqueous ammonia and this is then added to aqueous silver nitrate - observation Y. What are the observations X and Y? X Y A brown solution colourless solution B brown solution white precipitate C colourless solution colourless solution D colourless solution white precipitate please correct me if i am wrong by anydrous it means that it…

i need to know common name of the following compound... and as a clue, common name has been mentioned in 20th century novel... let me know folks.. if anyone knows....

Given the following genomic structure of a gene, describe how 40 kD and 70 kD proteins could be produced. [The average molecular weight of an amino acid is 110 Daltons.] Any input on how to go about solving this would be appreciated.

32 In a genetic engineering experiment a piece of double-stranded DNA containing 6000 nucleotides coding for a specific polypeptide is transcribed and translated. What is the total number of amino acids in this polypeptide? A 500 B 1000 C 2000 D 3000 33 Bacteria were grown in a medium containing 15N. After several generations, all of the DNA contained 15N. Some of these bacteria were transferred to a medium containing the common isotope of nitrogen, 14N. The bacteria were allowed to divide once. The DNA of some of these bacteria was extracted and analysed. This DNA was all hybrid DNA containing equal amounts of 14N and 15N. The remaining bacteria were left in the medium w…

Hi everyone, I was going to see if anyone that was familiar with how PAGE is done, if someone would be willing to check to see if my interpretation of the hypothetical data attached is correct? It's a hypothetical experiment where you're testing the DNA-binding domain of a protain to a transcription factor using a native polyacrylamide gel and you have to interpret the results. The hypothetical results are attached below to this post. It's for a homework assignment for a Biology course I'm currently taking and wanted to see if my understanding was correct. Thanks so much! I know that for native PAGEs that are done, both size and charge of the protein and DNA have to be …

At ground level, the air pressure measured with a barometer is 1000 mb. The barometer is lifted upward by a weather balloon. When the balloon reaches 2 km above the ground, the measured air pressure is 800 mb. Explain why the air pressure decreased. After the balloon goes up another 2 km (now 4 km above the ground), will the measured air pressure be exactly 600 mb, lower than 600 mb, or higher than 600 mb? Explain the reason for your answer. I know the air pressure decreased because there is less air above the balloon; so there are less air molecules pushing down on it. Im not so sure about the 2nd part of the question. I think that after the balloon goes up another…

how to covert 0xAB00FF12 into 0xABFF0012 ? I tried using XOR ...means 0xAB00FF12 ^ 00FFFF00, is this right

I'm having a little trouble with this problem for my physics homework, could anyone give me a step in the right direction here, thanks. ''The rear of a bicycle passes a point P on a road and travels at a steady speed of 12 m/s down the road. At the same instant the front of a car starts from rest at P and moves in the same direction as the bicycle with an acceleration of 2 m/s^2. When and how far from P does the front of the car catch up with the rear of the bicycle.''

first of all I would like to know how to simplify the following cos (-t)cos t - sin (-t)sin t? I have tried but i can't seem to get it. I get stuck. The other thing I am wondering about is why does cos(a-b) = cos (b-a) and sin(a-b) = sin(b-a)? I am not really sure how to put it in words but I think it is because they are both on the positive side of the x-axis but not both on the positive of the y-axis. I'm I on the right track or not?

I am looking at motion and learnt that the velocity can negative while the acceleration positive, so i wondered whether the velocity and acceleration could be in different direction or did the have to be both in the same Direction? And I also have another question: What does it mean when the acceleration is negative? I didn't understand the textbook.

Can someone please explain to me how I can find sin, cos and tan from a unit circle?

The foundation of dimensional analysis comes from the need to compare two seemingly different phenomena that describe the same phenomena in relative terms and see whether they are equivalently the same in absolute terms. In mathematics, physics or any other scientific discipline, analyzing a formula with absolutely same variables at both sides of its equation makes no meaning; reason being that the formula is dimensionless and thus does not qualify to be a true equation. For example; any formula in the form of 9=9 or E=E (suppose that E represents energy) is dimensionless because variables that describe the same phenomena have been described in their absolute term from bo…

Okay so I believe this is a fairly straight forward enthalpy problem, but for what ever reason it says i'm wrong. You carry out an exothermic reaction inside a Styrofoam cup calorimeter, using a temperature probe to monitor the temperature throughout the reaction. You find that the temperature increases 6.37 °C during the reaction. The specific heat of the reaction solution is known to be 6.20 J/g•°C, and the mass of the solution was measured as 33.0 g. Calculate q, the heat for this reaction, in kJ. Be sure to include the correct sign for your answer. So here is what I did. I understand the equation i'm to use is q=cm(change in temperature)= (specific heat of so…

My son is in third grade, and it's time for the science fair. He's interested in doing a project on non-Newtonian fluids (aka Oobleck, from the Dr. Suess book), specifically on the classic cornstarch/water suspension. We've made the stuff plenty of times before, including a kiddie pool full for a birthday party of his about a year ago. My problem is that he needs to come up with a question and hypothesis. I don't want to let him take the easy way out by asking a basic question that he already knows the answer to like "Is Oobleck a liquid or solid?" or "Can you walk on something you can also sink in?" etc. I was hoping someone else might have a good idea for someth…