Homework Help

If t2 = 17.00 s for slinky (a), what is t1?'' That is all the information I have to complete this question, and I dont really know where to begin. t1 and t2 seem to be .16 of a full wavelenght apart, and the amplitude is given, but I can't seem to get any more useful information out of there. Or alternately, I dont know what to do with the information I do have. Any help on this would be appreciated. I doubt its actually very hard, but I really need some help on starting off.

Just wondering...if you planned an experiment to compare the effects of two different types of exercise on aerobic fitness, which two types of exercise would you choose?

Expand by use of minors 3 4 -2 6 4 3 0 4 2

I have a question that google could not answer for me. i was wondering what exactly is magnetism. i dont mean about doing experiments with iron fillings to see the magnetic field. I mean, what causes magnetism? what makes the atoms in all magnetic materials move towards magnets? I am halfway through my first year doing my GCSE's and would really like to know this. please help me if you can. G.B.

what causes sublimation at low temperatures?

The first one is about refraction: when a wave cross a boundary (from a shallow area to a deeper area, why this also regard as two medium?), refraction occurs. Suppose a wave cross from an area of deeper to an area shallower, the wave length as well as the speed decrease, why it must be so (i.e. deeper the area, shorter the wave length is; shallower the area, longer the wave length is), why can't vice versa occurs? It's about diffraction: Why the wave direction can be changed during diffraction even it's speed, wave length and frequancy are all still constant?

Hello, I needed to survey a group of people for their opinion on some current political problem. I decided to do the one on Ken Bigley, since it is quite controversial. Please give your vote here and your reason if you'd like. I will give a full bibliography(so if you post your opinion and the reason for it, and i decide to include it in my project you will be mentioned in the bibliography.) Encrypted P.S This is for Socials Class, and I have two weeks left! So vote, vote, vote! And may i also ask Blike or Sayanora to make it so that this post is always first.

My teacher has asked me to do some reseach on the history of the particle theory of matter. i can't find anything. Do you guys know anything about the history of it?

I cant seem to figure out 1. How does water interact with other molecules (give examples too please) 2. How does water moderate the effects of temperature changes and what causes water molecules too speed up at a slower rate. 3.How does cohesion help tall trees (I know it involves water moving up the tree) I am curious to know the answers

I would like to know the answers for some really difficult extra credit problems Whats the difference between Glucose Fructose and Galactose and how does ribose and deoxyribose compare to them What Makes Surose Lactose and Maltose Unique from each other ? Why is cellulose used for structural strength and starch is not ? Why are unsaturated fatty acids are mostly liquid at room temperature What Nucleoties are unstable molecules which carry energy from place to place in the cell and how the unstable molecules work. Thank you

The curve in the graph of the relationship between light intensity and photosynthetic rate firstly is quite steep and become gentler and gentler gradully, finally becomes horizontal as limited by other factors. At first the slope is steep as the input of light energy increases, and finally it becomes horizontal as limited by other factors such as carbon dioxide concentration, but why would it first get gentler?

is there any interaction between alcohol and air in a closed system without any variance in temperature? is there any interaction between mothballs (napthalene) and air in the same conditions? by "interaction" i mean chemical reaction or phase change C2H5OH + O2 --> HC2H3O2 + H2O ??? this isn't reversible right?

Hm (I know excuses, escuses but...) partly because it was my first day back to school and because I have a strong headache I just dont seem to understand what I'm suppose to be doing so I would appreciate if someone could just clarify it for me: the qu. says: Find the values of (thetha which i'll change to X) for which the following functions have a. max. values b. minimum values 2 sinX+cosX I differentiate first right? and then should i just solve for 2 cosX-sinX=0?

Recently, i have been facing questions about the gas laws, which i am not familiar with...this is one of the hardest...can someone help me? The molar mass of a newly synthesized flurocarbon was measured in a gas microbalance. This device consists of a glass bulb forming one end of a beam, the whole surrounded by a closed container. The beam is pivoted, and the balance point is attained by raising the pressure of gas in the container, so increasing the buoyancy of the enclosed bulb. In one experiment, the balance point was reached when the flurocarbon pressure was 327.10 Torr; for the same setting of the pivot, a balance was reached when CHF3 (M = 70.014 g mol^-1) was …

It has been a couple years since I have had drug calculations - would someone please remind me of the steps I need to answer the following questions A 7% glucose solution is made up of what % glucose and what % water?? A 20% NaCl solution is made up of what % NaCl and what % water?? thanks so much in advance

How do you distinguish between longitudinal section, vertical section and transverse section? It occurs to me that I've no idea. Thank you.

Uhm, I have to prepare an oral presentation on Ligeia by Edgar Allan Poe and I've been investigating if "Ligeia" means something in particular but I can't find anything so I was wondering if anybody here knew. Thanks!

im just adding the finishing touches to my reation rates coursework. It is an investigation into how temperature affects the rate of reaction between hydrochloric acid and magnesium. ive drawn a linear graph with my results, with a line of best fit, and worked out the lines gradient to 0.42 s/degrees C. i know what the gradient is, its just i dont know what it actually shows me in terms of the rate of reaction. thanks.

can someone tell me, why do you have to halve the hight a triangle to find the area.

I have to write an essay about "Gay Marriages" and of coures Im with gay marriages.. so I was wondering if anybody could help me?! or if anyone has written an essay about..

Hi, Can someone explain how is the difference between arc AE and arc BD is twice the magnitude of angle ACE... I know it is the geometric theorem, but I need exlpaination on how it is possible.. I searched around google... but couldn't find any useful resource... thx..

I've been given this redox equation to balance: CH3CH2OH + Cr2O7(2-) --> CH3COOH + Cr(3+) The 2 half-reactions are: oxidation of ethanol: CH3CH2OH --> CH3COOH reduction of acidic dichromate ion: Cr2O7(3-) --> Cr(3+) What I got was: Ox: CH3CH2OH + H2O --> CH3COOH + 4H+ + 4e Re: 14H+ + 9e + Cr2O7(2-) --> 2Cr(3+) + 7H2O I then added multipled the top equation by 9, the bottom by 4 and then added the 2 equations together to get: 9CH3CH2OH + 4Cr2O7(2-) + 20H+ --> 9CH3COOH + 8Cr(3+) + 19H2O Does any1 agree with my answer? (I just think the numbers seem a bit big...)

I am at a loss of how to write down circuit network equations when (i) a current source which cannot be clearly converted into a equivalent voltage source is included in one specific mesh. (ii) a dependent voltage source is included in one specific mesh. using the matrix equation form. For (i), the voltage across the current source is dependent on the variables of mesh currents, so it cannot be included into the voltage excitation/input matrix Vmesh. For (ii), can we treat the dependent source as a normal element like a resistor in the derivation of the impedance matrix? The matrix equation of the circuit network is characterized by Vmesh = Z * I wh…

A 28 496 8128 33550336 8589869056 137438691328 Determine the value of A that begins this pyramid of numbers and also provide your reasoning for determining this value.

The wording of this problem is quite strange. I attempted the problem and gave up half way through. I think I simply miscalculated when when using the PV over nT = PV over nT. Here's the problem word for word: An empty glass container has a mass of 658.57 g. It has a mass of 659.45 g after it has been filled with nitrogen gas at a pressure of 790. torr and a temperature of 15 degrees C. when the container is evacuated and refilled with a certain element (A) at a pressure of 745 torr and a temperature of 26 degree C, it has a mass of 660.6 g. Compound B, a gaseous organic compound that consists of 85.6% carbon and 14.4% hydrogen by mass, is placed in a stainle…