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December 22, 2014

Posts by m


Total # Posts: 791

spanish
te question is Ella se ____ Julia. We were to pick between llama, llamas, and nombre. I think the answer is llama but a little hesitant on that
April 22, 2012

Physics (Waves)
You have 27 tuning forks that oscillate at close but different frequencies. What are the (a) maximum and (b) minimum number of different beat frequencies you can produce by sounding the forks 2 at a time, depending on how the frequencies differ? *I KNOW HOW TO DO B, I GOT THAT...
April 20, 2012

science
My son had this assignment and it is totally confusing to me. This is the info provided: 4.5-V lightbulb and 3 batteries that are 1.5 V each Knowing Ohm's law: voltage (in volts) =current (in amps) x resistance (in ohms) or V=IR. Determine in which circuit the voltage was ...
April 17, 2012

physics
Just as a car tops a 51 meter high hill with a speed of 85 km/h it runs out of gas and coasts from there, without friction or drag. How high, to the nearest meter, will the car coast up the next hill?
April 14, 2012

Calculus
Given: available material= 1200cm^2 Box w/ square base & open top Find: Largest possible value of the box Can anyone give me a detailed, step-by-step explanation for this problem. I'm studying for an exam and have been working on this for awhile. The help would be very ...
April 10, 2012

CHemistry Question (pv=nrt)
How many liters of chlorine gas at 1.00 atm and 20ºC will be required to oxidize 167 grams of bromide ions to molecular bromine? A. 13.5 L B. 25.1 L C. 101 L D. 1.72 L E. 50.3 L
April 5, 2012

CHemistry Question
How many liters of chlorine gas at 1.00 atm and 20ºC will be required to oxidize 167 grams of bromide ions to molecular bromine? A. 13.5 L B. 25.1 L C. 101 L D. 1.72 L E. 50.3 L
April 5, 2012

Physics (Gravitation)
In Fig. 13-25, three particles are fixed in place. The mass of B is greater than the mass of C. Can a fourth particle (particle D) be placed somewhere so that the net gravitational force on particle A from particles B, C, and D is zero? If so, in which quadrant should it be ...
March 29, 2012

Chemistry Question
A 500-mL aqueous solution of NaCl was electrolyzed for 15.0 minutes, producing Cl2 gas at the anode. If the pH of the final solution was 12.15, calculate the average current used. (hint: what products are produced at the cathode?) A. 3.8 A B. 2.2 A C. 0.47 A D. 1.4 A E. 0.76 A
March 29, 2012

Chemistry Question (oxide acidity)
Which of the following oxides is the most acidic? A. Al2O3 B. P4O10 C. SO3 D. MgO E. SiO2
March 29, 2012

Chemistry Question (currents)
A 500-mL aqueous solution of NaCl was electrolyzed for 15.0 minutes, producing Cl2 gas at the anode. If the pH of the final solution was 12.15, calculate the average current used. (hint: what products are produced at the cathode?) A. 3.8 A B. 2.2 A C. 0.47 A D. 1.4 A E. 0.76 A
March 29, 2012

Chemistry Question (elements)
Indicate which of the following elements do not exist in nature in the elemental state (that is, they only exist in the combined state of being in compounds with other elements): Cl, K, S, Al, Ar, N A. S, Ar, N B. Ar only C. Cl, K, Al D. Cl only E. Cl, K
March 29, 2012

Chemistry Question
The reaction of quicklime (CaO) with sulfur dioxide (SO2) is an important reaction for reducing SO2 emissions from coal-fired power plants: CaO(s) + SO2(g) → CaSO3(s) This reaction is an example of: A. a precipitation reaction B. an electrolysis reaction C. a combustion ...
March 29, 2012

Physics Question (Tension)?
A solid object can be deformed in three fundamental ways. A roof is held up by support columns inside the building. The deformation of the column caused by the roof is A. Compression and Tension B. Shear C. Bulk
March 26, 2012

Statistics Question
For a test of Ho: p = 0.5, the z test statistic equals 1.52. Find the p-value for Ha: p > 0.5.
March 22, 2012

Physics
In 1980, over San Francisco Bay, a large yo-yo was released from a crane. Suppose the yo-yo was 153 kg, and it consisted of two uniform disks of radius 35.4 cm connected by an axle of radius 3.19 cm. What was the magnitude of the acceleration of the yo-yo during (a) its fall ...
March 17, 2012

Physics (Rolling)
In Fig. 11-35, a solid brass ball of mass m will roll smoothly along a loop-the-loop track when released from rest along the straight section. The circular loop has radius R, and the ball has radius r << R. (a) What is h if the ball is on the verge of leaving the track ...
March 16, 2012

Maths
find s given that v= 20, a= 10, u= 10 and v squared= u squared =2*a*s
March 5, 2012

Physics (Rotation)
In Fig. 10-28, wheel A of radius rA is coupled by belt B to wheel C of radius rC. The angular speed of wheel A is increased from rest at a constant rate α. Find the time needed for wheel C to reach angular speed ω assuming the belt does not slip. (Hint: If the belt ...
March 2, 2012

Chem Question (thermo)
Calculate ΔG at 25 ºC for a reaction in which Ca2+(aq) combines with CO32–(aq) to form a precipitate of CaCO3(s) if the concentrations of Ca2+(aq) and CO32–(aq) are 0.023 M and 0.13 M, respectively. (ΔGº = –47.94 kJ) A. –62.3 kJ/mol B...
March 1, 2012

Chem (Thermodynamics)
I got "B". Can anyone verify?
February 29, 2012

Chem (Thermodynamics)
The standard molar enthalpy of fusion and the standard molar enthalpy of vaporization of benzene are 10.9 kJ/mol and 31.0 kJ/mol, respectively. Calculate the standard molar entropy changes for the solid ↔ liquid and liquid ↔ vapor transitions for benzene. At 1 atm ...
February 29, 2012

Chem (electronegativity)
Calculate the E°cell for the following voltaic cell (use the standard electrode potentials given on page 829 of the textbook, or from some other source): Ni(s) + 2 Ag+(aq) → Ni2+(aq) + 2Ag(s) ====================== I got -0.55 as my answer. Ecell is Ecath-Eanod The ...
February 29, 2012

Chem (Thermodynamics)
Ok thanks!
February 29, 2012

Chem (Thermodynamics)
Ok for dHorxn I got 62.1kJ for dSorxn I got 132.7JK I did 62.1kJ x1000 to make it JK units too. So i got 0=62100-(T)(132.7) so T = 195degrees right?
February 29, 2012

Chem (Thermodynamics)
Calculate the temperature (in ºC) to which silver ore, Ag2O, must be heated to spontaneously decompose the ore to oxygen gas and solid silver metal at standard state. (ΔHºf of Ag2O(s) = –31.05 kJ/mol; Sº values: Ag(s), 42.55 J/mol•K; O2(g), 205.1 ...
February 29, 2012

Math
Explain in writting how to divide .12 by 8. (without using fractions) fifth grade
February 29, 2012

Chem (Thermodynamics)
Calculate the temperature (in ºC) to which silver ore, Ag2O, must be heated to spontaneously decompose the ore to oxygen gas and solid silver metal at standard state. (ΔHºf of Ag2O(s) = –31.05 kJ/mol; Sº values: Ag(s), 42.55 J/mol•K; O2(g), 205.1 ...
February 28, 2012

history
I have an assignment about the American Revolutionary War. I have to Select three major periods of the Revolutionary War to use as points of comparison showing how the war was experienced in the northern theater with how it was experienced in the southern theater during these ...
February 28, 2012

ELA
Write the unstressed syllable beside each word worship ship pilgrim grim repair re distance tance carrot rot entry try destroy des forbid bid hidden den dozen zen
February 27, 2012

chemestry
if 40 grams of water are produced when 30 grams of ethane is burned what is the % yields
February 14, 2012

Intermediate Algebra
The perimeter of a triangle is 48 centimeters. The longest side is 2 centimeters less than the longest side. Find the lengths of each side of the triangle.
February 14, 2012

Shurley English
How would you label sting in "Ouch, that bee sting hurts."
February 14, 2012

college algebra
By completing square, f(x) = 3[x^2 -2x - 7/3] = 3[x^2 - 2(x)(1) + (1)^2 - (1)^1 - 7/3] = 3[(x - 1)^2 - 1 - 7/3] = 3(x - 1)^2 - 3 - 7 = 3(x - 1)^2 - 10
January 17, 2012

English
when you get the answers, please put them here!
January 9, 2012

6th grade math-ms. sue
MS. Sue here is exactly what the paper says- think back to the experiment you just designed to test the Best Wheels Bike Shop's new super titanium wheel bearings. Can you be sure that your results are due to the new bearings and not something else? That depends on how you ...
January 9, 2012

6th grade math
My son has this homework and I am all confused... the paper says to think back to the experiment you just designed to test the Best Wheels Bike Shop's new super titanium wheel bearings. He did not do this experiment which leads me to believe this is just a statement for ...
January 9, 2012

government
I have to explain how American Association for Affirmative Action influences public policy. I still get confused on public policy but so far I believe the answer is this group influences public policy through affirmative action policies for women, minorities, etc. that ...
January 4, 2012

Physics
280 Pa
December 19, 2011

government
In my class I had to choose a major national issue and identify the forces in a political party that help drive the party to its position on the issue. I chose education and the Democratic party. The driving forces part is where I am stumped. I figured the forces would be ...
December 19, 2011

government MS. Sue please
Ms. Sue, Could you double check these, I asked you earlier and got the ball rolling. I had to choose five interests that are affecrted by public policy decisions. I chose No Child Left Behind, Health care insurance, environmental safety, veterans groups, and gun safety. What I...
November 30, 2011

government
I have to make a chart that shows five interests that are affected by public policy decisions. I am not 100% sure on this and did post earlier to which Ms. Sue graciously told me my 2 originals were ok. I have figured out these 5 but want to make sure they are interests that ...
November 30, 2011

government
I have to make a chart that shows five interests that are affected by public policy decisions. I am not 100% sure on this but could No Child Left Behind, and Environmental safety (like the oil spill that just happened in the gulf)?
November 29, 2011

PLEASE HELP-PHYSICS HW
A 130 kg astronaut (including space suit) acquires a speed of 2.80 m/s by pushing off with his legs from an 2000 kg space capsule. What is the change in speed of the space capsule? As the reference frame, use the position of the space capsule before the push. If the push lasts...
November 20, 2011

algebra
what does the a stand for in Pa^t what does the r stand for in Pe^rt how are they related?
November 6, 2011

english llit
I am still trying to figure out the meter in the poem On the Amtrak from Boston to New York City. Looking at the types of meter I narrowed it down to iambic pentameter and anapestic. I thought the meter was anapestic because of the 2 unaccented syllables followe by 1 accented ...
November 6, 2011

english lit
I am writing a paper on "On the Amtrak from boston to new york city" by sherman alexie. I need to detail how the poet used literary conventions and poetic devices such as meter, imagery, and symbolism to communicate the meaning of the poem. I have the imagery and ...
November 6, 2011

Chemistry
Kate's (a) and (b) are correct, but (c) is incorrect. 6.00 M NaOH = (0.325 mol NaOH) / (mL NaOH) mL NaOH = (0.325 mol NaOH) / (6.00 M NaOH) With correct significant figures, the answer to (c) is 54.2 mL.
October 31, 2011

bio270
a. downward deflection b. upward deflection c. no deflection d. up then down deflections e. down then up deflections
October 16, 2011

bio270
In an electrocardiograph a wave of sustained depolarization moving towards a negative electrode will produce:
October 16, 2011

physics
Average destance between Earth and the moon is 384 790 km. How many days would it take sound to travel to the moon?
October 12, 2011

physics
Vibration of the dishwasher causes standing waves in a cup. crests form four concentric rings and the diameter of teh cup is 6.0cm v=1.5m/x . What is teh frequency of the vibrations?
October 12, 2011

math
Keno is a casino game in which the player has a card with the numbers 1 through 80 on it. The player selects a set of k numbers from the card, where k can range from one to fifteen. The "caller" announces twenty winning numbers, chosen at random from the eighty. the ...
October 9, 2011

math
My son is doing this in 6th grade math class. Mr. Weiss started painting the kitchen at 8:45 am and finished painting at 12:00 pm. About how many hours elapsed between the time he started painting and the time he finished painting the kitchen? Answers are 2h, 3h, 4h, and 5h. ...
October 6, 2011

history
I am helping my son who is in the 6th grade. He has a crossword puzzle that relates to early civilization and the clue is different. We have this much so far ???e??? for a total of 7 letters with an e in the middle please help.
October 5, 2011

physics
+ 8 going with wind - 4 against the wind -4+8/2 = 2 is the average speed
October 2, 2011

Chemistry
Thank you so much drbob! Your explanation make sense! :D
September 29, 2011

precalc
find two functions f and g such that (f+g)(x) = 5 and domain of f + g is [0, infinity)
September 27, 2011

math
use intermediate value theorem to show f(x) has a zero f(x)= x^5 - 4x^4- 7x^2 - 6x; [-0.7, -0.6]
September 25, 2011

math
use intermediate value theorem to show f(x) has a zero f(x)= x^5 - 4x^4- 7x^2 - 6x; [-0.7, -0.6]
September 25, 2011

pre calculus
given points (0,0) (0,5) vertical asymptote of (-1,1) and horiz (2,1) how do I find the equation??????
September 22, 2011

pre calculus
solve in real number system x^3 + 5x^2 - 12x = 14 =0
September 22, 2011

pre calculus
find the bounds on the real zeros????? f(x) = x^5 - 5x^4 +8x + 2
September 22, 2011

Calculus
use the intermediate value theorem to determine whether there is a zero f(x) = -3^3 - 6x^2 + 10x + 9 ; [-1,0]
September 22, 2011

precalc
convert into equation with 0 on right hand side sq route (x+6) = 6-2 sq route (5-x)
September 13, 2011

chemistry
S2(s)+H2(g)=H2S(g)
September 12, 2011

algebra 2
i need help solving these inequalities i'm not sure if i should factor things out or not 4x^3 is greater than or equal to 16x and 4 is greater than or equal to 2x^3 + 8x
September 8, 2011

Physics
99.48 km/h
September 5, 2011

4th grade math
the answer is 1232 as two of the digits should be same also
August 30, 2011

Chemistry
oh ok thanks i got .09 i hope thats right
August 23, 2011

Chemistry
The question said to use dimensional analysis...
August 23, 2011

Chemistry
(0.75 moles Al(NO3)3/L Al(NO3)3) x 0.040 L Al(NO3)3 = ??moles Al(NO3)3 I am unsure how to find the factor to convert moles Al(NO3)3 into moles NO3. i think that if i do the first section, you get .03 moles as your answer for moles of Al(NO3)3, but I am not sure. how can i ...
August 23, 2011

chemistry
use dimensional analysis to find how many moles of nitrate ions are in 40.0 mL of a 0.75 M aqueous solution of aluminum nitrate
August 22, 2011

geometry
If CD is parallel to AD, then CD meets AD at D. But parallel lines never meet!
July 20, 2011

physics
A 1,200-kg car runs into the rear of an 1,800-kg minivan that was moving at 6 m/s. The two vehicles are locked together after the collision and move with a speed of 12 m/s. How high above the ground would the locked- together vehicles have to be raised in order for their ...
June 28, 2011

psychology
use the book
June 24, 2011

MATH
(1/6)to the power of 3x = 36 to the power of 2-x
June 15, 2011

MATH
What is the 9th term -1/18 1/6 -1/2
June 15, 2011

MATH
Convert 322 degrees to radians
June 15, 2011

College algebra
At least, from the sign of a, one can tell whether it is concave upward or downward a>0 => concave upward.
June 6, 2011

science
4. Why do we tend to assume that natural chemicals are safe while industrial chemicals are evil? Is this correct?
June 5, 2011

english
I have been working on this and am still confused. Which sentence is correct. Using the pronoun case- A) My brother knows more about technology than me. B) My brother knows more about technology than I. I thought it would be best for B and add to it the word do at the end but ...
May 29, 2011

chemistry
how much energy is released when a 5600 gram sample of water cools from 99 degress celsius to 28 degrees celcius
May 10, 2011

Physics
An elevator is moving down with an acceleration of 2.46 m/s^2. What would be the apparent weight of a 66 kg man in the elevator?
March 29, 2011

History
I am totally stumped. The picture we are to look at is called Five generations of slaves in South Carolina. The picture shows a family outside their home. The questions we are asked is to 1-make inferences about the owner of the plantation that is showin in the image 2-do you ...
March 16, 2011

Management
How does management style influence the working environment at MTV ?
March 7, 2011

history
What impact did the War of 1812 have on the American Federal Government? My answer is that it strengthened it with economic opportunities, diplomatic avenues, and nationalism. Is this correct?
March 4, 2011

history
What is the significance of Alexander Hamilton's financial program? How did Hamilton's financial program play a role in the creation of a two-party political system? My response to the first was that he wanted to increase the nations finances and to make sure there ...
March 2, 2011

8th grade science
Tyler put a cube of blue closed cell foam in a syringe and clamped the the end closed, what happened to the particles outside of the cube?
February 28, 2011

history
Explain how the existence of the Confederate government played a role in the development of the current constitution. I feel that the articles of confederation joined the states to gether- uniting America and creating a government that was elected by the people with powers ...
February 25, 2011

Engineering Physics
A 1.0-kg block is released from rest at the top of a frictionless incline that makes and angle of 37 degrees with the horizontal. An unknown distance down the incline from the point of release, there is a spring with k=200 N/m. It is observed that the mass is brought ...
February 24, 2011

calculus
Suppose A is a positive real number and mA is the average value of (sin(Ax))3 on the interval [0; 2]. Compute mA. what is lim mA as A goes to infinite?
February 23, 2011

algebra
addition method:3x-5y=-2 and 5y-2x=-2 how would I solve it since they are not together?
February 21, 2011

Science. Please Help!
A completely liquid solution of KCl suddenly begins producing solid crystals (as precipitate) when one crystal of KCl is dropped into it. The original solution was
February 14, 2011

Science
What is the defenition of the word dissolve?
February 11, 2011

Physics
Engineers are trying to create artificial "gravity" in a ringshaped space station by spinning it like a centrifuge. The ring is 170 m in radius. How quickly must the space station turn in order to give the astronauts inside it apparent weights equal to their real ...
February 11, 2011

cultural diversity
what is acculturation
February 9, 2011

American Government
e. Its head is appointed by the president.
February 6, 2011

history
From where did early North Americans migrate and how did they reach North America? Describe the lifestyles of early North American men and women. Im not sure which way to answer this one. I have two answers. The first was coming from Asia and crossing the land bridge at the ...
February 5, 2011

Urgent!!! Physics
Andrea, I think you shouldn't have waited til the last minute for that mastering physics homework thats due at 11:59pm
January 26, 2011

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