Homework Help

Hello everyone! I am trying to solve a Math question, but due to how hard it is I am not able to find the answer. In the attachment you see a triangle, what I am trying to find out is the values of those variables. If you could help me find the value of "Z" I am pretty sure that it would be eassier for me to find the rest. Thank you in advacne for the help!

The title should explain its self but...I'm getting B's in some of my classes cause I see no point of studying and im getting lazy....Psssh yeah ok. So please make this go away! ITS KILLING ME!

Hey everyone! I am researching about offspring and I don't even know what it is. I looked it up at dictionary.com but it doesn't explain it very clearly. Could anyone on SFN please tell what this term is all about? Any help would be greatly appreciated! Thanks a lot!

Hi I am working on balancing some equations in chemical reactions. I have worked hard, but am still stuck, and now feeling very unsure of myself. Could anyone see if these are done correctly, and if not, help me see what I am doing wrong here? (also how to do subscripts and superscripts here?) My equation in need of balancing: Al(OH)3 + H2SO4 ----> Al2(SO4)3 + H2O my answer: 2Al(OH)3 + 3H2SO4 ---> Al2(SO4)3 + 3H20 Is this correct? It looks like it to me, but am not sure. Any help GREATLY appreciated!

What's the reaction between alkalis and some reactive metals? I don't have that reaction in my books/ Why doesn't sulphuric acid react with calcium sulphate?

I am seriously in need of help for a personal interview for my science project question. My question is: How do people see color? Does rotation (if the object is rotating) affect what color that we percieve? Awnswers would be greatly appreciated.

Is ethanoic acid considered as ions in reactions?

Hi... Resisitivity of a material depends on length... cross sectional area.... electrical resistance.... am i right? what's the equation? Thanks Alot :D

Hi, My name is Orange and I'm new here. And I just started to learn about science like biology. So Im a newbie in this section!! hehe.. And There are some things that I don't understand on my biology homework and hope any of you nice smart people would help me out. I have a few questions that I don't understand about atoms and everything...Can someone help me and give me some clue so I can understand it better? Thanks Question 1: I understand that water is consider a polar molecule, but then how does hydrogen bond relate to it? Question 2: How and why water form spheres like droplets when it flung into the air? ( I don't quiet get how the water became droplets an…

When I mix vinegar with baking soda, it produce gas. But it also produce salt, I'm confused on how does gas related to salt.

how would one calculate the entropy change of the universe when a block of mass m, heat capacity C, at temperature T is dropped from a height h into a lake (resevoir) of temperature T also? thanks natski

i need help figuring out how to get the effeciency {bad spelling} of simple machines. I know how to get the mechanical advantage. Thanks in advance

Question. Can anyone please give me a clue on how to calcuate molarity given its termperature and its density? Much appreciated.

I have a topic on volcanoes, its how the minerals in lava rock formations vary and I actually have to go to a volcano. Lucky me I live in Hawaii. But I need some constructive critasism here. Not some flames on how stupid my topic is. Thanks!

I need a calculator that will automatically multiply any number it's given by 2.54. I need this for a web page I'm doing for a science report. It's due at the end of the month, so, no hurry.

Using Glue, Toothpicks (small, restaurant variety) and Elmer's White Glue I need to make a wheel. It has to be a wheel of decent size (one-three inches in diameter). Any suggestions on creating the best wheel for attaching to an axle and rolling down a ramp. Thanks in advance.

Q1. One of the important features of gamete formation is the generation of bio-diversity. What are the two processes that account for the genetic variation among gametes formed by meiosis (reduction division)? Draw diagrams to explain your answers. Q2. Describe the differences between cancer cells and normal cells. Am only able to find one difference so far- a cancer cell's rate of division is not controlled.

Hi, I need help with my chemistry homework. This has to do with chemical bonding. These are only some of the questions the teacher gave me. Describe: The force that bonds two hydrogen atoms in a hydrogen molecule, H2 The relationship between the bond energy of a molecule and its bond strength Which is more stable, compounds with high bond energies or low bond energies Given the following bond length: Molecule 1. F2 2. Cl2 3. Br2 4. I2 Bond Length 1. 141 pm 2. 199 pm 3. 228 pm 4. 267 pm Bond Energy 1. 156 KJ/mole 2. 243 KJ/mole 3. 193 KJ/mole 4. 151 KJ/mole Explain the general trend that a bond length increase…

If you read this thread, either help me to slove it or stay away. Please do not leave any unuseful notes or comments. Answers and steps are highly appreciated. Thank you all for reading. 1) At 10 p.m. a 5 foot 6 inch tall young lady is directly below a street lamp which is on a pole 25 feet in the air. This young lady begins walking in a straight line away from the street at 6 feet per second. After how many seconds is the shadow she casts 11 feet long? 2) Given triangle ABC. Let E be a point on line AB and D be a point on line AC such that line DE // line BC and BD bisects angle ABC. If AE=4, AC=18 and BC=15 then what is the length of DC?

I'm running a slab gel electrophoresis project for a Chemistry class I'm taking, but for some reason, I cannot correctly see the banding patterns of my experiment for some reason. I have followed the instructions provided by an expert in the field, but I must be doing something wrong, on account of the fact that rather than getting a proper banding pattern when viewing the slabs under a UV box, I get odd streaks on the reused agarose slab, and nada on the newer one (See attached picture). My question: How does one properly use the SYBR green to get the banding patterns. I obviously am doing something wrong. If you need to know what I did, then here it is. After I…

I am not feeling challenged by my current workload at school, so I decided to do an independent project. I am in 9th grade and my options are somewhat limited. "Project" probably isn't the best word it's really and independent study. I'm looking for specific subjects not just broad topics like "Study CHemistry!!!!" My current idea is to study evolution, specifically the debate of Group vs. Individual selection. I am interested in everything though, so spout some ideas please!

I have recently been asked to define "scientific reduction" using a bunch of articles handed out. However, I'm completing the excecise in order to dodge a test, so none of the papers I'm supposed to use are yet available for reference! I've understood that "scientific reduction" is something Karl Popper has discussed, yet so far I have failed to locate a strict definition of his, even though Sir Poppers seems to have used it quite a lot in his immense literature. Any help would be greatly appreciated, guys!

Greetings, I was wondering if someone could help me with some of my chemistry difficulty. I have to do an experiment to find the solubility of calcium hydroxide. I have gone as far as to prepare the saturated solution of calcium hydroxide and to plan a titration with HCl. My problem is that I do not know what concentration of HCl I should use, how would I calculate a reasonable amount? Also, correct me if this is wrong. If I measure out 0.5g of calcium hydroxide dissolve it in water, filter it through a funnel and then titrate the saturated solution, I will be able to compare it with the original mass I measure out. To compare the solubility would I just say the mass …

Greeting people, Problems of the day: For what nonzero value of r, the radius, is the circumference of a circle numerically equal to its area? Thanks!

when we look at a geometry problems, most of the time it asks you to seek a way to proof certain figure. Recently I'm pretty scared when I ran into these problems. Can anyone help me to straight my thought, and help me how to think logically when I try to prove a figure?