Monday

April 21, 2014

April 21, 2014

Total # Posts: 1,007

**Math **

ok sorry about that

**Kinesiology**

what is the torque generated to hold a 60N dumbell at 90 degrees? The dumbell is 0.6m from the shoulder, the centre of the mass of arm weighs 30N and is .25m from the shoulder, the moment arm is 0.05m?

**statistics**

we have a normal distribution with mean 76 and standard deviation 6.4, find the percent between 69.6 & 76?

**Living Environment**

Well, some abiotic factors in Ethiopia are: Volcanoes (lava) Sulfuric acid In Patagonia: Snow Volcanoes Wind Rockies: Snow Pakistan/Himalayas: Ice Snow Rocks Forests of China: Snow Wind

**calculus**

let f(x)= 9(x/(x-1)square)= 9x/ x square-2x+1 find the domain of f and compute the limit at each of its endpoint. then list all horizontal and vertical asymptotes

**medical**

accreditation affect the practical activities of record management in hospitals

**english**

thank you!

**english**

what's the difference between a major character and a minor? Is a minor like every other character besides the major characters?

**math**

find the area of a rectangle whose length is 3x and width is 4x +6

**religion**

what did hebrews do to please their gods?

**child day care**

of the forms used in a child care program which of the following would be required for the children?

**french**

I need help unscrambling these french words: srteelt, sbrtmie and eiuocrrl. thank you for helping :)

**Physics**

vf^2=2*9.8*520 vf=100.955 ??

**Physics**

A wrench falls out of the gondola of a balloon that is 520 m above the ocean. Assuming negligible air resistance, what was the wrench’s speed as it hit the water? The acceleration of gravity is 9.8 m/s2 .

**chem**

Use a temperature - composition diagram to explain why fractional distillation of two components is more easil? easily accomplished if the components have boiling points that differ by 20*C or more.

**algebra**

Thanks Ms. Sue

**algebra**

3/4 of a number is 1/2. Find the number in the lowest terms... please show work I am confused

**algebra**

Please help....struggling with word problems and please explain how to get the answer.... Max has a collection of 210 coins consisting of nickels, dimes, and quarters. He has twice as many dimes as nickels, and 10 more quarters than dimes. How many coins of each kind does he h...

**Physics**

A ball rolls off a table moving 3.6m/s in the horizontal direction. The table is 1.2 meters high. Find the amount of time needed for the ball to hit the ground.

**Human Resource Management**

Can someone give me an example of due diligence in human resources

**Math**

Jack is decorating for a party. He has 125 feet of paper streamers to use over 3 doorways. He will use the same amount for each door. How many feet will he use in each?

**Chemistry**

if one mole of gas occupies 22.4L at STP what is the volume at 25 degress C. and 3.05 atmosphere?

**physics**

A truck is stopped at a stoplight. When the light turns green, the truck accelerates at 2.5 m/s squared. At the same instant, a car passes the truck going 15 m/s. Where and when does the truck catch up with the car?

**chem**

a.What advantages does ligroin have over n-pentane as a recrystallization solvent? b. What advantages foes ethanol have over n-octanol as a recrystallization solvent?

**business**

Assignment Type: Individual Project Deliverable Length: 500–750 words Points Possible: 110 Due Date: 9/11/2011 11:59:59 PM CT You are a marketing manager interviewing for a new job at several different firms simultaneously. You expect to be asked the same questions in ea...

**chem (urgent)**

Can someone please explain to me in simple terms what the eutectic point and temperature are?

**algebra 1**

38/100=x/800 set it up as a proportion so you cross multiply and get (38)(800)=100x 30400=100x soooo 304 kids like chocolate

**Algebra**

y=29+.32x

**Tulane Physics**

a rock is thrown unward off a cliff at a 45 degree angle. THe rock falls back to the elevation it was thrown from after 3.56 seconds. It hits the water 5.31 seconds after it was thrown. How high is the cliff? what is the horizontal distance from the cliff to the point in the w...

**Math**

yes! cuz its the absolute value of that equation, the numbers are just inverses of one another. so if A is 4 and B is 5 then 4-5 is -1, which would become 1 5-4 is 1, which remains 1 10-5 is 5 5-10 is -5, which becomes 5. they always stay the same. without the absolute value t...

**Chemistry**

I am having trouble balancing the following equation using the Ion-Electron Method. Se(solid) + HNO3(aqueous) ----> SeO2(solid) + NO(gas) + H2O(liquid) Can you explain the steps that you have to take to solve it?

**physics**

How long does it take an automobile traveling 68.3 km/h to become even with a car that is traveling in another lane at 54.3 km/h if the cars’ front bumpers are initially 121 m apart? Answer in units of s.

**statistics**

a pouch contains 97 green beads 72 red beads and 7 yellow beads. how many blue beads should be added so that the probability of drawing a red bead is 3/10 ?

** science**

4.444444444444

**physics**

A motorcycle officer hidden at an intersection observes a car driven by an oblivious driver who ignores a stop sign and continues through the intersection at constant speed. The police officer takes off in pursuit 1.98 s after the car has passed the stop sign. She accelerates ...

**physics**

A passenger train is traveling at 30 m/s when the engineer sees a freight train 357 m ahead of his train traveling in the same direction on the same track. The freight train is moving at a speed of 5.9 m/s. (a) If the reaction time of the engineer is 0.43 s, what is the minimu...

**physicsHELP!!!**

Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 50 m apart. The train on the left accelerates rightward at 1.05 m/s2. The train on the right accelerates leftward at 0.93 m/s2. (a) How far does the train on the left travel bef...

**physicsURGENT!!!!!!**

Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 50 m apart. The train on the left accelerates rightward at 1.05 m/s2. The train on the right accelerates leftward at 0.93 m/s2. (a) How far does the train on the left travel bef...

**physics**

Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 50 m apart. The train on the left accelerates rightward at 1.05 m/s2. The train on the right accelerates leftward at 0.93 m/s2. (a) How far does the train on the left travel bef...

**physics**

A bus accelerates at 1.4 m/s2 from rest for 10 s. It then travels at constant speed for 26 s, after which it slows to a stop with an acceleration of magnitude 1.4 m/s2. (a) What is the total distance that the bus travels? (b) What was its average velocity?

**health**

How does technology improve our ability as health care organizations to market ourselves in our communities

**Calculus**

a) Find the Taylor series associated to f(x) = x^-2 at a = 1. Be sure to show the general term of the series. b) Find the radius of convergence of the series. c)Use Lagrange's Remainder Theorem to prove that for x in the interval of convergence with x > 1; the power ser...

**chemistry**

a compound x has a solubility of 79g/100 g h20. when 24 g of x are added to 68 g of water the resulting mixture is homogeneous or heterogenous

**algebra**

x^3+216

**CAL**

At noon, ship A is 30 nautical miles due west of ship B. Ship A is sailing west at 21 knots and ship B is sailing north at 15 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

**History**

What was the most important foreign policy goal of the United States between 1945 and 1990?

**History**

Why did some senators oppose the participation of the U.S. in the League of Nations following World War I?

**History**

Why did imperialism become popular again during the last quarter of the 19th century?

**chemistry**

the compound tin(II)fluoride,or stannous fluoride,once was a common ingredient in toothpaste.It is produced according to the following reactions: Sn(s)+2HF(g)->SnF2(s)+H2(g) if 45.0 grams og HF react with Sn,how many grams of stannous fluoride are produced?

**Chemistry 12**

how are we supposed to add them together when there is no I in the first equation?

**Chemistry 12**

wow thank you very much, that site is very helpful and you've been very helpful! Thank you!

**Chemistry 12**

i don't understand how i'm supposed to use the reduction potentials table to blance it

**Chemistry 12**

a) Use the standard reduction potentials table to balance the following redox equation: H2O2 + I + H = H2O + I2 b) Balance the following redox equation by the oxidation number method: Ag + HNO3 = AgNO3 + NO + H2O

**Chemistry**

A-A^+ D^2+ + C = No Reactions B^2+ + C = B C^2 A^+ + B = A + B^2+

**Chemistry**

This question is really making me upset i just can't get the answer right. i've tried so many times. If someone could help it would be muchly appeciated! Experiments were performed with four metals and solutions of their ions: A-A, B-B2+, C-C2+, D-D2+. the results of t...

**chem12**

that is helpful, i just don't get how to get the graph right, mine went up, how do i get the numbers and plot the graph correct?

**Intro to Psychology**

Thanks I reread that part and it's d! I always over think my answers

**Intro to Psychology**

I'm thinking personality test

**Intro to Psychology**

Although not considered high in reliability or validity, this type of psychological assessment, if used correctly and by well-trained professionals, can provide valuable insight into understanding a person's thoughts and feelins. a. intelligence test b. achievement test c....

**chemistry **

how many grams of h2o are produced when 50.0g znco3 reacts with c6h8o7

**chemistry**

i have another one i can't get the write answer for... Calculate the pH of the colution that results when 27.38 mL of 0.15 M H2SO4 is mixed with 18.50 mL of 0.19 M Ca(OH)2? Thank you guys so much!!

**chemistry**

Just keep getting different answers when i review this, i can't seem to get the correct one. Calculate [H3O] and [OH] for a sodium hydroide solution having a pH of 12.5

**physics**

A pen placed 13.0 cm from a concave spherical mirror produces a real image 13.5 cm from the mirror. a) What is the focal length of the mirror? Answer in units of cm. b) Calculate the magnification of the image. Assume the pen is placed 28.9 cm from the mirror. c) What is the p...

**Physics**

With an average acceleration of −2.2 m/s^2, how long will it take a cyclist to bring a bicycle with an initial speed of 14.5 m/s to a complete stop? Answer in units of s.

**Chemistry**

i have another one i can't get the write answer for... Calculate the pH of the colution that results when 27.38 mL of 0.15 M H2SO4 is mixed with 18.50 mL of 0.19 M Ca(OH)2? Thank you guys so much!!

**Chemistry**

Just keep getting different answers when i review this, i can't seem to get the correct one. Calculate [H3O] and [OH] for a sodium hydroide solution having a pH of 12.5

**chemistry**

Decrease in pressure

**hum**

Identify leaders of the Civil Rights and Black Power movements and their contributions to their respective causes.

**Calculus**

Thanks so much! :)

**Calculus**

This is the questions I have trouble with : Set up (do not evaluate) the integral that gives the surface area of the surface generated by rotating the curve y=tanhx on the interval (0, 1) around the x-axis. Anyone who can help? Not really sure how to even begin! Thanks

**algebra**

6sqrt (2) - 3sqrt (7) = ???

**Chemistry**

Teeth and bones are composed, to a first approximation, of calcium phosphate, Ca3(PO4)2(s). The Ksp for this salt is 1.3 10-32 at 25°C. Calculate the concentration of calcium ion in a saturated solution of Ca3(PO4)2. Please, help!

**Chemistry**

Magnesium fluoride dissolves in water to the extent of 8.0 10-2 g/L at 25°C. Calculate the solubility of MgF2(s) in moles per liter, and calculate Ksp for MgF2 at 25°C. I keep getting the same answer...please help!

**Physics**

A man jogs along at 1.2 m/s. His dog, playing 36 m behind him, waits for 5 s, then takes off after him at 3.1 m/s. How far apart are they when the dog starts after his master? Answer in units of m. How far will the dog run? Answer in units of m.

**physics**

How far will the dog run?

**physics**

A man jogs along at 1.2 m/s. His dog, playing 36 m behind him, waits for 5 s, then takes off after him at 3.1 m/s. How far apart are they when the dog starts after his master? Answer in units of m. If the man continues jogging, how long will the dog have to run to catch up to ...

**Physics**

The velocity of the transverse waves produced by an earthquake is 5.08 km/s, while that of the longitudinal waves is 8.3312 km/s. A seismograph records the arrival of the transverse waves 55.9 s after that of the longitudinal waves. How far away was the earthquake? Answer in u...

**physics**

How fast are the waves traveling?

**physics**

A fisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. It takes a time of 2.60 for the boat to travel from its highest point to its lowest, a total distance of 0.620 . The fisherman sees t...

**critical and creavtive thinking**

Assignment: Together We Stand Letter Suppose you live in a new suburban community. It offers all the amenities and benefits of a tight-knit small community, with the benefits of living close to the big city. Some years pass, and several children and adults in the community st...

**Chemistry **

m = 4.0/1200 = 300 T = 2*1.86 c/m*300 = 1116

**Chemistry **

I forgot to post this one with the other What is the freezing point of a solution containing 4.0 Mol of sodium chloride in 1200 grams of water? (kf for water is 1.86 C/M) I don't really want the whole answer, just where I would plug in the numbers. I keep forgetting what f...

**Chemistry **

Ok, I'm sorry. Not taking chemistry, but I'm taking a practice test, and I didn't know what to do. I want to be ready for next year. Thanks!

**Chemistry **

(5.0 g) / (90.03488 H2C2O4/mol) / 0.40m = 45.01744

**Chemistry **

How many Kilograms of water must be added to 5.0 grams of oxalic acid (H2C2O4) to prepare a 0.40 Molality?

**Pre Chem**

How much heat will be produced when 16grams of C2H6 burns? The reaction is 2 C2H6 + 7 O2 --> 4CO2 + 6 H20 triangle heat = -350kJ

**Chem**

Balancing equations? NaOH + H3PO4 ----> Na3PO4 + H2O C3H8 + O2 ----> CO2 + H2O

**Chem**

How much heat will be produced when 16grams of C2H6 burns? The reaction is 2 C2H6 + 7 O2 --> 4CO2 + 6 H20 triangle heat = -350kJ

**physics**

An electron in an electron beam experiences a downward force of 1.9×10^−14 N while traveling in a magnetic field of 6.4 × 10^−2 T west. The charge on a proton is 1.60×10^−19. a) What is the magnitude of the velocity? b) What is its direction?

**prep chem**

How many milliliters of oxygen 2(g) will be produced at 720mmHg and 17 celsius if 0.460 grams of KClO3 are reacted in the reaction? Formula is 2 KClO3 --> 2 KCl + 3 O2(g) I know to change temp into K

**Prep chem**

Thank you

**Prep chem**

A gas occupies 30L at 25 celsius. What volume will it occupy at 200 celsius at the same pressure?

**Chemistry**

Benzene (C6H6) is an organic compound that boils at 80.1°C. If 100.0 grams of liquid benzene at 18.5°C is given 16.88 kJ of energy, what is the final temperature (in °C) of the benzene? The ΔHvaporization for benzene = 31.0 kJ/mol and the specific heat of liqu...

**Science**

Consider a mole of CO2 and a mole of N2O each at STP. Which of the following statements are true? Check all that apply. ~Both gases will have approximately the same density at these conditions. ~When the volume is not held constant, raising the temperature will decrease the de...

**Grammar**

I need to make the below sentences parallel. To succeed in the new economy, workers will have to learn throughout their careers, adapt to changing circumstances, and self-motivation will be needed. My answer - To succeed in the new economy workers will have to learn throughout...

**Chemistry**

Determination of the solubility product of PbI2. From the experimental data we obtain [I-] directly. To obtain Ksp for PbI2, we must calculate [Pb2+] in each equilibrium system. This is most easily done by constructing an equilibrium table. We first find the initial amount of ...

**Chemistry**

Consider the reaction 2 SO2 + O2 in equilibrium with 2 SO3 . At 25°C Ho = -197.78 kJ and So = -187.95 J/K. Using this information, calculate the equilibrium constant for the reaction at 50°C. (R = 8.314 J/K) Enter your answer using TWO significant figures.

**billing and coding**

pick 3 firms to research. based on internet reseach on these companies write a 500-750 word reseach paper proposing at least three marketing opportunities that you would strongly suggest that each firm pursue

**physics 211**

A deep-sea fisherman struggles to bring in a big salmon (see figure below). Find the force each hand must exert on the pole if the tension in the line is 159 N. Neglect the weight of the pole and assume that the force exerted by the left hand is directed along the horizontal. ...

**Chemistry**

Imagine a titration starting with 25 mL of 0.1 M phosphoric acid, and titrating it with 100 mL of 0.1 M KOH. Please go look up the Ka constants for phosphoric acid, and then,explain why I asked for so much more KOH than would be needed for CH3CO2H.

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