Monday

April 21, 2014

April 21, 2014

Total # Posts: 1,022

**Physics**

a water wave has frequency 0.40 Hz and wavelength 2.0m. Its speed is

**Physics**

a water wave has frequency 0.40 Hz and wavelength 2.0m. Its speed is

**Physics**

a water wave has frequency 0.40 Hz and wavelength 2.0m. Its speed is

**Social Studies**

Why Do You Think It Was Hard For Spain To Maintain It's Empire ? Explain.

**History**

Do You Think It Was Right Or Wrong For The United States To Declare War On Spain ? Explain.

**Chem **

what mass of KCl in grams is formed with 20 lbs of KClO3 is decomposed KCl03 yields KCl + O2

**Chem**

When 30.0 grams of aluminum reacts with HCl how many grams of aluminum chloride are formed? Al = HCl yields AlCl3 + H 2

**Chem**

Where is the 12g coming from?

**Chem**

calculate the mass in grams of carbon needed to produce 160 grams of CO2 burning. C + O2 -> CO2

**Physics**

What force would be needed to accelerate a 0.040-kg golf ball at 20.0 m/s^2??

**physics**

i need the answer not the equation???

**physics**

is that the correct answer?

**physics**

A baseball player throws a ball. While the 700.0-g ball is in the pitchers hand, there os a force of 125N in it. What is the accerleration of the ball?

**Extra Credit Projects**

Create a scrapbook for english , it's very fun and exciting !

**History **

Why Do You Think It Was Hard For Spain To Maintain It's Empire ?

**English**

I have to do an essay and i have trouble answering some of the questions.Thnaks!I need help with the second question.(its anthropology) 1)whatare Different forms that marriages take in the world? Polygany, monogamy, polygny, polyondry,exogomy & exogomy. 2)What are some of the ...

**SCIENCE-PLS HELP!**

Hold on i'll help youu!

**Chemistry**

A rock contains 200. µmol 238U (t1/2 = 4.5 109 yr) and 116 µmol 206Pb. Assuming that all the 206Pb comes from decay of the 238U, estimate the rock's age. Please explain step by step.

**English**

what is a Ninus’ Tomb & Metaphor?

**math**

You aren't old Ms Sue you really taught 77 years :O

**science**

Name an example of each. - Liquid: - Gas: - Solid:

**math**

Its ok ms sue i figured it out! Im gonna ask a science question.

**math**

Journal 5 - Banking Directions: Examine the check register below and decide if the entry is a deposit or a withdrawal. Fill in the balance column for each transaction. Check Number Date Description of Transaction Withdrawal/Payment Deposit/Credit Balance $3,500.00 10/1 Paychec...

**math**

Can i show you a thing i need help with...

**english**

Can you tell me what a Begrudge is?

**Math**

Don't worry i just basically need example. Your Awsome!

**Math**

Thank you Ms. Sue i hope i can ask more questions :)

**Math**

what is a example of interest?

**english**

Thank you Ms Sue your awsome!!

**english**

Ok ty what is a thesis?

**english**

What is a Hook? for english...

**english**

Ok its a english Question..

**english**

can i get help on a Question?

**Math**

Are you ok Ms Sue?

**Math**

Journal 4- Long Term Debt Look at the long term debt below. Then choose the best plan for repayment of that debt. Explain why this decision is the best one for you. Use vocabulary terms from the lessons in week 4. Education Loan: Bank Options $ % Interest Total Length of Loan ...

**Math**

I need help with a math question problem

**English**

First of all is this free?

**lititure **

This is due in a 1 hour D:

**Literature**

what do you mean?

**lititure **

Ty sorry im havin bad typos i hope you can help me :)

**lititure **

what are the cause and effect of these things in brave new world? In fiction, as in life, events have causes and, in turn, become causes of subsequent events. Here are some events from Brave New World. Write a sentence that describes a major cause of each event and another sen...

**Statistics**

Olive-Oil producers have expanded to approximately 120 producers statewide. Analysts estimate the average price consumers pay for a bottle of olive oil is $21, with a standard deviation of $2.40. What is the probability that the average price paid by a random sample of 36 oliv...

**Physics**

A satellite made of aluminum with mass 3500 kg travels on circulated path in 100 km height over the earth. Because of airresistance of the airveil the satellite loses energy and falls in a spiral down to earth. a) What is the mechanical energy of the satellite in the beginning...

**Physics**

A cylinder shaped buoy is stationary out on a lake. The height of the buoy is 1 m and the diameter is 30 cm and it‘s mass is 50 kg. Now a whale swims under the buoy and hit it. The buoy raises up and begins to oscillate. a) Find the total force on the buoy if the displace...

**Physics**

A weight with mass m lies on a surface with no friction. The weight is also connected to a spring with springconstant k and then the weight is driven with outer force F(t)=F0sin(Ωt). There is a friction in the spring and he‘s described with –bv(t). With a help f...

**chemistry**

(a) A person drinks four glasses of cold water (3.0°C) every day. The volume of each glass is 2.5x10^2 mL. How much heat (in kJ) does the body have to supply to raise the temperature of the water to 37°C, the body temperature? (b) How much heat would your body lose if ...

**Physics**

A beam has a mass M and length L. A point mass m is located in distance d from the end of the beam and the point mass and the beam lies on the same line.a)Calculate the gravitational force of the beam on the point mass.b)Calculate the gravitational force on m from point mass M...

**Social studies **

What is outsourcing ?

**Social studies**

What is the answer ? Haha

**Social studies**

What does that have to do with my question ? Lol

**Social studies**

Before the first white person set foot in North America, it's people can be described most accurately as A) nomadic B) democratic C) multicultural D) homogenous I think it's either a or d but I'm not sure please help!!! By the way I searched nomadic it means "...

**Physics**

V= 4.31 x 10^-46 ?

**Physics**

Marie Curie first identified the element radium in 1898. She found that the radium-226 (mass 3.77x10^-25 kg) decays by emitting alpha particle (mass 6.64x10^-27 kg). If the alpha particle's speed is 2.4x10^6 m/s, what is the speed of the recoiling nucleus?

**Chemistry**

Chemical analysis show that hemoglobin contains 0.34 percent Fe by mass. What is the minimum possible molar mass of hemoglobin? The actual molar mass of hemoglobin is four times this minimum value. What conclusion can you draw from these data?

**chemistry**

Benzene and cyclohexane molecules both contain six-membered rings. Benzene is a planar molecule, and cyclohexane is nonplanar. Explain.

**Chemistry**

Use the data in Table 15.3 (in the book Chemistry after Raymond Chang) to calculate the equilibrium constant for the following reaction: HCOOH(aq) + OH-(aq)= HCOO-(aq) + H2O(l)

**Math**

@ss

**Trig**

Factor and simplify the expression. 1-sin^3 x

**trig**

Find tanx if sinx = 3/4 and x is in quadrant II.

**calculus**

How to factorise t3-8t2+16t?

**calculus**

How to factorise t3-8t2+16t?

**Statistics**

7. Give and interpret the 95% confidence interval for the hours of sleep a student gets.

**math**

what is 3z+(-10)=-19

**college prep english**

Ok so long story short I need help with homework......I have 3 questions on genre and its 2 genre's how do I know which one to write about ?

**chemistry**

An oxalic acid solution contains the following species in varying concentrations: H2C2O4, HC2O4-, C2O4^2-, and H+. Which of the above four species can act only as acids, which can act only as bases, and which can act as both acids and bases?

**CHEM**

The equilibrium constant for the reaction below is Kc = 9.1 10-6 at 298 K. 2 Fe3+(aq) + Hg22+(aq) 2 Fe2+(aq) + 2 Hg2+(aq) Calculate G when [Fe3+] = 0.21 M, [Hg22+] = 0.013 M, [Fe2+] = 0.022 M, and [Hg2+] = 0.020 M.

**chemistry**

1998 scientists using a special type of electron microscope were able to measure the force needed to break a single chemical bond. If 2.0 x 10^-9 N was needed to break a C-Si bond, estimate the bond enthalpy in kJ/mol. Assume that the bond had to be stretched by a distance of ...

**chemistry**

Most organic acids can be represented as RCOOH, where COOH is the carboxyl group and R is the rest of the molecule. (For example, R is CH3 in acetic acid, CH3COOH). (a) Draw a Lewis structure for the carboxyl group. (b) Upon ionization, the carboxyl group is converted to the c...

**Geometry**

a rectangle has an area of (2x^2 +12), a length of 9x+1) and a width of (3x-6). what is the value of x?

**Algebra**

If the formula R = -0.037t + 50.1 can be used to predict the world record in the 400 meter dash t years after 1925, for what years will the world records be 48.1 seconds or less?

**chemistry**

A student breaks a thermometer and spills most of the mercury (Hg) onto the floor of a laboratory that measures 15.2 m long, 6.6 m wide, and 2.4 m high. (a) Calculate the mass of mercury vapor (in grams) in the room at 20 degrees celcius. The vapor pressure of mercury at 20 de...

**chemistry**

If 10.00 g of water are introduced into an evacuated flask of volume 2.500 L at 65 degreed celcius, calculate the mass of water vaporized. (Hint: Assume that the volume of the remaining liquid water is negligible; the vapor pressure of water at 65 degrees celsius is 187.5 mmHg.)

**chemistry**

If 10.00 g of water are introduced into an evacuated flask of volume 2.500 L at 65 degreed celcius, calculate the mass of water vaporized. (Hint: Assume that the volume of the remaining liquid water is negligible; the vapor pressure of water at 65 degrees celsius is 187.5 mmHg.)

**chemistry**

Which of the following aqueous solutions would you expect to be the best conductor of electricity at 25 degrees celcius? Explain your answer. (a) 0.20 M NaCl (b) 0.60 M CH3COOH (c) 0.25 M HCl (d) 0.20 M Mg(NO3)2

**Physics I**

An Earth satellite moves in a circular orbit 770 km above the Earth's surface. The period of the motion is 100.0 min. What is the speed of the satellite? What is the magnitude of the centripetal acceleration of the satellite?

**Physics I**

A stone is projected at a cliff of height h with an initial speed of 48.0 m/s directed 60.0° above the horizontal. The stone strikes at A, 5.20 s after launching. Find the height, h, of the cliff. Find the speed of the stone just before impact at A. Find the maximum height...

**5th grade math**

what are the divisidles rules

**5th grade math**

what are the divisidles rules

**Chemistry**

the basis of oxidation number considerations, one of the following oxides would not react with molecular oxygen: NO, N2O, SO2, SO3, P4O6. Which one is it? Why?

**business**

Do you think that in the Post-Washington Consensus the developing world will be better off economically and politically

**chemistry**

A compound made up of C, H, and Cl contains 55,0 percent Cl by mass. If 9,00 g of the compound contain 4,19 x 10^23 H atoms, what is the empirical formula of the compound?

**pre-calculus**

Find the intercepts of the graph of x^2 + y^2 + 4xy - 2x + 7y = 8

**English**

We should either visit the art museum or attend a concert this weekend. Is this a parallel sentence?

**applied math**

how do you solve 2b+9=3

**math**

give expressions in the variable n, n ≥ 3 for the number of sugar cubes in the n*n*n cube with 0,1,2, or 3 painted faces, respectively

**Chem**

Is sea water close to being a saturated sodium chloride solution?

**accounting**

what is the journal entry if a owner of a company deposited $15,000 in their checking account. In return they received 1000 shares of common stock in their corporation. The par value of the common stock is $1 per share?

**math**

g(x)= 1-2x-3, x< or equal to 0. x-18, x>6 find g(6). so I used the first equation. 1/2(6)-3 and I got 0, but that's not the right answer so I'm not sure what I'm doing wrong.

**calculus**

Recall that a function G(x) has the limit L as x tends to infinity, written lim(x->infinity)G(x) = L, if for any epsilon > 0, there exists M >0 so that if x > M, then |G(x) − L| < epsilon. This means that the limit of G(x) as x tends to infinity does not e...

**calculus**

sorry, i meant ln(1-x) in the first sentence

**calculus**

You are right my expansion was incorrect ln(x-1) = series of (x^n+1)/n+1 = x + x^2/2 + x^3/3 i dont know why your terms are negative though. After i multiply (x + x^2/2 + x^3/3) by (1 + x^2/2! + x^3/3!) = x + x^2/2 + (x^3/2! + x^3/3) = x + x^2/2 + 5x^3/6 I dont understand why ...

**calculus**

the question asks to use power series though. So i found the power series of ln(1-x) = Series of nx^n-1 and for e^x is the series of x^n/n! i then found the first three terms of each ln(1-x) = 1 + 2x +3x^2 e^x = 1 + x^2/2! + x^3?3! after multiply them i got 1 + 2x + (X^2/2!+3x...

**calculus**

Use multiplication of power series to find the first three non-zero terms of the Maclaurin series of e^x ln(1 − x).

**calculus**

wait. aren't all the odd terms positive? since its (-1)^n-1? because if you sub n=3, it becomes (-1)^2, which is positive? And thank you once more. This was very helpful!

**calculus**

So, you're saying that when you separate an alternating series into two (odd and even) then the (-1)^n-1 goes away? And why did you make S1 negative, but not S2. And do i need to find the sum for S2 to answer the question? Because i only know how to find the sum of geometr...

**calculus**

im confused. I was taught that if it is an alternating series then you can only use the alternating series test to see if it was diverging or converging. And i did the alternating series test and all the conditions were met for each series seperately.

**calculus**

Show that the series(−1)^n−1(bn) where bn = 1/(n^1/2) if n is odd and bn = 1/2^n if n is even, diverges. Why does the alternating series test fail?

**phiisical science**

Suppose an unknown substance has a melting temperature of 1,200 degrees Celsius and a density of 16.7 g/cm3.

**thermodynamic**

A rigid vessel of 1m^3 contains steam at 20 bar and 400 degree C. the vessel is cooled until the steam is just dry saturated. Calculate the mass of steam in the vessel.

**algebra**

The perimeter of a square is equal to its area plus four. What is the measure of one side of the square?

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