Monday

July 28, 2014

July 28, 2014

Total # Posts: 1,833

**Physics**

A centripetal force acts

**Physics**

What term describes a force that causes an object to move in a circular path?

**Physics**

What is the centripetal acceleration of a skater moving with a tangential speed of 2.0 m/s in a circular path with radius 2.0 m?

**Physics**

What is the speed of an object in circular motion called?

**trigonometry**

in triangle abc, angle c is a right angle, AC=8,Bc=15 and AB=17 a.find Sine a b.Find cosine A c.Find Sine B d. Find COsine B E. the measure of angel A f. the measure of angela b Can u tell me the answers and how to do it. Because im in 8th grade

**trigonometry**

in triangle abc, m<c=90, bc=20, and ba=40. a.find sine a b.find measure of <a

**triginometry**

thanks

**triginometry**

In Triangle RST, m<S=90, RS=5, and ST=12. Find Cosine T

**Physics**

suppose the hammer has a mass of 7.26kg, the wire is 1.00m long, and the force keeping the hammer moving in a circle is 7.43 x 10^3N. what will the hammer's speed be when the thrower releases the wire?

**Physics**

what is magnitude of the centripetal if the tangential speed of the car is 2.0m/s and the radius of the wheel is 83m

**Chemistry**

1. c 2. a

**math**

how to slove (2y+5)(y-3)

**chemistry**

How many atoms of Ag are in each of the following quantities? 1- 0.38 mole Ag2S? 2- 0.78 mole AgCl?

**Chemistry**

What is the name of the product when cinnamaldehyde and cyclopentanone undergo aldo condensation?

**College Chemistry**

Sulfur trioxide is made from the reaction of sulfur dioxide and oxygen. how many grams of SO3 can be made from the reaction of 1.91g SO2 with 1.29g O2? 2 SO2(g) + O2(g)---> 2SO3(g) a) 2.39g b) 3.20g c) 3.23g d) 4.77g e) 6.46g How would i solve this problem?? Im thinking i w...

**social studies**

what tools did egyptians use to bulid pyramids

**Chemistry**

What precautions must be taken when you introduce the mixture of compounds to be separated onto the absorbent column

**College Chemistry**

Thanks, i had my doubts! I was also wondering how i can determine which ionic solid will have the least melting point. Do i look at the intermolecular forces, or do i need to look else where for my answer???

**College Chemistry**

Does Vapor Pressure decrease as intermolecular forces increase???

**Math**

You roll a number cube three times. Find P(all odd).

**College Chemistry**

I see. Well thanks DrBob222. Im starting to understand it a little more.

**College Chemistry**

I see. Well thanks DrBob222. Im starting to understand it a little more.

**College Chemistry**

BF3 can best be described through the lewis structure as? 1. It has less than an octet on at least one atom. or 2. It has less than an octet of electrons on all toms. I know that it is missing electrons in order to satisfy the octet. And Boron nor fluorine can make double bond...

**Chemistry**

Hi Can someone please help me undersand how to get the answer to this question A 15.0 mL solution of 0.050 mol/L AgNO3 was titrated with 0.0250 mol/L NaBr in the cell SCE || titrated solution | Ag(s) Find the cell voltage for 10.0 mL of titrant added. (a) -0.0312 V (b) 0.194 V...

**math **

y=3x^2-7

**math **

y=3x^2-7

**calculus**

Solve the equation. 2x - 4 = -10 Find the LCM of 29 and 116. Simplify. 88 · 8-8

**mat**

2 - x > 17

**computer programming c++**

c++ program questoin A particular talent competition has 5 judges, each of whom awards a score between 0 and 10 to each performer. Fractional scores, such as 8.3, are allowed. A performer’s final score is determined by dropping the highest and lowest score received, then ...

**chemistry**

Sulfur trioxide, SO3, is produced in enormous quantities each year for use in the synthesis of sulfuric acid. S(s) + O2(g) -> SO2(g) 2SO2(g) + O2(g) -> 2SO3(g) What volume of O2 (g) at 350 degrees Celsius and a pressure of 5.25 atm is needed to completely convert 5.00g o...

**4 grade math**

are you seriously in 4th grade and using this website for help? lol i'm a 3rd year college student and i just started to ask for help online

**math**

a series of numbers starts with 2.each number in the series is two times as great as the number before it.what is the sixth number in the series.

**US History**

How did the Missouri Compromise cause the North and South to have even stronger feelings of sectionalism in the United States?

**College Chemistry**

How do acids and bases react?

**US History**

What was the Gasden Purchase?

**CRT 205**

I AM HAVING TROUBLE WITH FINAL PROJECT ON GUN CONTROLL

**organic chemistry**

Lab was: PREPARATION OF A SYNTHETIC PLANT HORMONE

**organic chemistry**

Lab was: PREPARATION OF A SYNTHETIC PLANT HORMONE

**PHYSICS PLS HELP**

Internal resistance problem. Suppose that in Figure 3.3, Vo=13V, R1=250kphm, R2=375kohm, and Ri=1.9Mohm. Initially, the voltmeter is disconnected. EXAMPLES: What is the voltage across R2? [Answer: 7.8 V.] What is the voltage across R2 with the meter connected? [Answer: 7.2292...

**Physics**

With speed 75m/s and period 5.42ms, calculate the wavelength.

**chemistry**

what is the pressure exerted by a 0.500 mol sample of nitrogen in a 10.0 L container at 20 degrees C?

**chemistry**

once i have the amount of mols of sucrose present how do i convert that to sucrose? and to kj and grams? lets say i have 0.03110 mols of sucrose

**chemistry**

if 32kj of energy results in an average weight gain of 1 g of body mass, then how much weight could a person gain after eating 1 cookie. use dimensional analysis mass of 15.21g of a cookie.

**chemistry**

does not at all say. thats all that is provided. it just sais use dimensional analysis to solve this question. i have a 95% average in this class so far and iam completely puzzled. this is a bonus question on a lab.

**chemistry**

if 32kj of energy results in an average weight gain of 1 g of body mass, then how much weight could a person gain after eating 1 cookie. mass of 15.21g of a cookie.

**Algebra**

No worries, Thank you

**Algebra**

it's f to the power of -1, then i think it's called composite f. Like you know when you get the problems fog of gof? it's like that except fof and the first f is raise to -1 power. Thanks

**Algebra**

using f(x)=4x-5, find f^-1 o f

**Inorganic Chemistry**

In the molecular compound [Co(NH3)3(DMF)](NO3)3 what is the mode of bonding in which DMF is preferred?

**Inorganic Chemistry**

In the molecular compound [Co(NH3)3(DMF)](NO3)3 what is the mode in which DMF is preferred?

**College Chemistry**

Would i take the n into consideration?? This has to do with quantom numbers by the way.

**College Chemistry**

How many orbitals have the following quantum numbers: n=6, l=2, ml=-2?? a. 0, b. 5, c. 7, d. 10, e.6 Since only one can include n=6 in its equation would it make it just one orbital having those numbers? im also thinking that there might be other orbitals that have these numbe...

**XECO 212**

I would for you to point me in the direction.

**Business**

How did U.S. manufacturers become vulnerable to offshore outsourcing? What are some of the operations management practices that can help bring manufacturing back to the U.S? How can a focus on quality improve manufacturing? How can lean manufacturing and near-sourcing help a c...

**physics**

how do i solve this, i tried dividing the mass by the height, but its wrong A 407-kg pile driver is raised 15 m above ground. (a) How much work must be done to raise the pile driver?__kj (b) How much work does gravity do on the driver as it is raised?__kj (c) The driver is now...

**College Chemistry**

Thank you i appreciate it.

**College Chemistry**

Part a: What mass of solid CuCL2 is required to prepare 450.0mL of 0.125M CuCl2 solution?? Part B: What are the concentrations of Cu +2 ions and Cl- ions in the above solutions. I understand part a, and got the right answer. i need help understanding part b.

**calc-kinematics**

if a particle moves along a line so that at time t where t [0,pi] its position is given by s(t)=-4cost-t^2/2+10 what is the velocity of the particle when its acceleration is zero? so i found v(t) = 4sint-t a(t)=4cost-1 = 0 solved for t plugged it into v(t) and i got the wrong ...

**calc-related rates**

"The volume of a cone of radius r and height h is given by V=1/2(pi)(r^2)(h)If the radius and the height both increase at a constant rate of .5 cm per second at WHAT RATE in cubic cm per second, is the volume increasing when the height is 9 cm and the radus is 6 cm" ...

**Chemistry**

When solving using the quadratic equation, I get two possible values. Which one do I use? Both are positive.

**Chemistry**

What is the pH of a 0.0054 molar solution of Oxalic Acid. K1= 6.5E-2, K2= 6.1E-5? Here's what I have so far for K1: 6.5E-2 = (x)(x)/ (x-0.0054) x= 0.0059 pH = -log(0.0059) = 2.23 K2 is pretty much the same, but I have to work it out. 6.1E-5 = (x)(x + 0.0059)/ (x-0.0059) x ...

**calc**

how to find the integral of this function x^2 * root(x^3+1)

**calc**

how do i find the derivative of........ (sinx) ^2-(cosx) ^2 i put it into my t-89 and got -4sinxcosx butthats not a multiple choice. can someone tel me how to do this by hand?

**chemistry**

Choose all of the following statements about the equilibrium constant K that are true: (a) If the K value for a reaction is > 1 then Go must be negative for this reaction (b) A large value for K implies there is a strong driver for the reaction to proceed in the forward dir...

**Math**

What is 563 divided by 4 show you work

**grammar**

preschool ivite pablo on thursdays.

**Chemistry**

I'm not real sure about the K1 expressions. Is this correct? C2H2O4 --> H+ + C2O4H- K1 = (x + 0.0054)(x + 0.0054)/ (0.0054-x) Solve for x then repeat for K2

**Chemistry**

What is the pH of a 0.0054 molal solution of C2H2O4. First ionization constant K1= 6.5 x 10-2, second K2= 6.1 x 10-5.

**Chemistry**

Is the answer 0.211 mg/L PbF2?

**Chemistry**

If PbF2 is poured into a solution of 0.012 molar F-, how much will dissolve at equilibrium?

**physics**

wait but kqq/r2 is the equation for a force not an energy

**physics**

An alpha particle approaches a uranium nucleus as 1e6 m/s what is the closest this particle will get to the nucleus how do you set this problem up? thanks!

**Chemistry**

when dissolved in an aqeous solution, which of the following salts will yield an acidic solution? NH4Cl, NaClO4, Na2S, MgBr2, Ba(CH3CO2)2

**English**

I have no idea, I cannot think clearly at all today. I wouldn't even know where to start, even though I know what an analogy is.

**PHYSICS PLEASE HELP!**

Suppose an electron is released from rest in a uniform electric field whose magnitude is 4.70 103 N/C. (a)How much work is done by the field in moving the electron through a distance of 7 cm? J (b) Through what potential difference will it have passed after moving through this...

**PHYSICS PLEASE HELP!**

(a)How much work is done by the field in moving the electron through a distance of 7 cm? J (b) Through what potential difference will it have passed after moving through this distance? V (c) How fast will the electron be moving after it has traveled this distance? m/s

**chemistry**

Thank you!

**chemistry**

So how would I put AgNO3 in the equation? That part kind of confuses me.

**chemistry**

The traditional method of analyzing the amount of chloride ion present in a sample was to dissolve the sample in water and then slowly add a solution of silver nitrate. Silver chloride is very insoluble in water, and by adding a slight excess of silver nitrate, it is possible ...

**Chemistry**

There was a typo on the problem. and cobalt was never meant to be used. It should have read copper which went along with previous questions. Hence, everyone's confusion. Thanks

**Chemistry**

Determine the moles of ammonia in the following cobalt ammine complex: A sample of .1500 g of the cobalt ammine complex is places in a flask and 25.00mL of .200M HCL is added. a few drops of bromocresol green is added and the titration with .100M to NaOH required 16.42mL. I fi...

**7th grade**

Transmission

**college Psychology**

I am having trouble describing the interaction (How does effect of one Independent variable depend on level of other independent variable and why?) My 1st independent variable is Type of Stimulus: with 2 levels pictures and words. My 2nd independent variable is Type of Content...

**french**

how would you say a 'model village'?

**french**

how would you say 'a minster' not a minister

**french**

thankyou

**french**

how would you say 'it's a market town'?

**Investments Analysis**

Can anyone help with ANY of these? Any good starting points would be great! Alpha (STI) 0.90 2008 Return(STI) 15% Beta(STI) 1.20 2008 Return(INX) 10% R_squared 36% Risk Free Rate 4% Variance(STI) .1296 b. What is the relative volatility (variability) of STI returns to INX retu...

**arithmetic**

what is 11/4,4/7 and 10/21 in the simplest form i tried adding divide not coming with the right answer

**math**

how to simplify 15/60 in a fraction

**spanish**

Islam ich bien im

**spanish**

Que mama sorté quou

**Chemistry**

For the equilibrium below at 400 K, Kc = 7.0. Br2(g) + Cl2(g) reverse reaction arrow 2 BrCl(g) If 0.90 mol of Br2 and 0.90 mol Cl2 are introduced into a 1.0 L container at 400. K, what will be the equilibrium concentration of BrCl?

**chemistry**

HCl + Zn --> Predict the products and decide if it occurs. I have the activity series, but there's only H2 on there, not H.

**maths **

what is 8% p.a on $11000 over 3 years compounding anually

**Chemistry**

In one experiment, 50.0ml of 0.10M CH3NH2, is mixed with 20.00ml of 0.10 M CH3NH3Cl. The kb of CH3NH2 is 3.70*10^-4. a) write the chemical reaction for the equilibrium which becomes established, using H2O as a reactant. b)Write the net-ionic equation that occurs when Ba(OH)2 i...

**earths core**

what are a few (1 or two) reasons why the core cant be of lonestones?

**science**

was their any changes to the ocean since 10 million years ago?

**Social Studies**

What were the conditions of the mines during the Industrial Reolution? Why did so many women want to work in the mines without clothing and have heavy belts around their waists and chains between their legs?

**us history**

Write an Essay about the different perspectives that a chinese native and a christian missionary might have had on the Boxers rebellion

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