Monday

July 28, 2014

July 28, 2014

Total # Posts: 2,696

**Integrated Physics and Chemistry**

Matching... Heat engine Heat pump Boiler Thermostat -a heating appliance that uses heat energy released from fossil fuels to warm water for use in radiant or convection heating systems -a appliacne that controls the maintenance temperature of a heating system -an appliance tha...

**Integrated Physics and Chemistry**

A thermostat is used for which of the following? A) Maintaining the temperature is a room B)Turning a heating system on C)Turning a heating system off D)All of the above

**math**

Please more help

**math **

In standard (x,y )coordinate plane,the graph of (x-2)^2 + (y+4)^2=9 is a circle.What is the area enclosed by this circle,expressed in square coordinate units?

**math**

In triangle ABC if <A and <B are acute angles and sin 10/13 , what is the value of cos A?

**Integrated Physics and Chemistry**

Some refrigerants used in air conditioners have been associated with.. A)somg B)destruction of the ozone layer C)thermal pollution D)power failures

**chemistry**

What would be the best technique to separate a soluble solid from a solution, like separating salt from a mixture of salt water?

**Social Studies**

ICIZENTS-people who have the right to participate in goverment

**algerbra 2**

if the sum of the focal radii of this ellipse is 12 what is the value of a^2?

**algerbra 2 **

given that a parabola has a directix of =-3.25 and focus of (0,-2.75) find the vertex

**Health**

For this Assignment, imagine that you are a policy analyst for your state human services department. You have been asked to write a short memorandum for the department director on a policy paper entitled Rising Health Care Costs: State Health Cost Containment Approaches. In yo...

**math**

how do you remember mixed numbers and improper fractions?

**hsm210**

What are some concerns about the current state of the human service industry?

**chemistry**

If you have 200. mL of a 0.50 M solution of KOH and you wish to dilute it to 0.30 M, how many mL of water should you add?

**HCS 320**

I am supposed to outline how to integrate communication from a central command area to all areas of the organization. The organization is FEMA. I am completely lost and I just need some help on how to get started. For instance what would be the central command area, and what a...

**Hcs341**

Please someone help me this was due yesterday

**Hcs341**

I would love a reference for description of the process for tracking and evaluating training effectivness.

**english**

identify one example of personification from dorothy aldis s poem snow and knikki giovannis poem the world is not a pleasant place to be

**english**

i have no clue how to paraphrase!!! paraphrase the quotation: the poets voice need not merel be the record of man it can be one of the props the pillars to help him endure and pervail.

**algebra 2**

please help i have done these problems 3 times now and always get them worng. find the first three terms of (a-b)^6 find the last three terms of (2x+y)^5 find the third fourth and fifth terms of (a+b)^9

**Algebra 2**

please help i seriously dont understand any of these!! solve by factoring: 1.x^3-12x = x^2 simplify 1.4c/12c^5 2. a^2x/a 3. x^3y^4/2 x^2y^6

**physics**

0.11

**Chem**

Sorry but i figured it out.

**Chem**

Still not understanding on how to set up the problem to get the answer.

**Math**

114

**physics**

THis can be found using the conservation of momentum. Pix + Pix = Pfx + Pfx Where P = mv The mass of the arrow is .3 kg, the target is .0225kg. The initial velocity of the target is -2.15 m/s and the initial velocity of the arrow is 38.0m/s. If the target is stopped, the final...

**Calculus.**

Given the function f with the restricted domain, find the points at which the tangent line is horizontal. f(x)=2sec(x)-tan(x) Domain: [-pi/2,pi/2] * I got (pi/6, square root of 3), but I am not sure if that is right, or if there is another point.

**Chemistry**

A solution consisting of 25.00 g Nh4Cl in 178 ml of water is titrated with 0.114M KOH. How many mL of KOH are required to reach the equivalence pt?

**6th grade math**

my answer is 5554 gallons

**statistics**

a simple random smaple of 55 mathematics teachers were timed as they completed sudoku puzzles. Their mean completion time was 20.3 minutes. The population standard deviation is assumed to be 12 mintues and times vary normally. Find 99% confidence interval for the mean time for...

**geometry**

Given that BD Û AC, which of the following statements is NOT necessarily true?

**MATH**

DETERMINE WETHER (7,-2)IS A SOULTION FOR 3X-2Y=14

**Chemistry**

Waht is the mass in mg of 0.016 moles of glucose (C6H12O6)?

**math college**

If the volume of a cone is 100cm cubed and the lateral surface area of the cylinder is 150cm squared, what is the height of the container

**math college**

If the volume of a cone is 100cm cubed and the lateral surface area of the cylinder is 150cm squared, what is the height of the container

**Statistics**

A survey found that 25% of pet owners had their pets bathed professionally rather than doing it themselves. If 20 pet owners are randomly selected find the probability that between 12 and 7 pet owners, inclusive, have their pets bathed professionally.

**math**

30 - 19 1/3

**Chem**

I want to see if i got my answer correct for #1 but I need help on #2 1.A 150g aluminum pan containing 500g of water is heated on a stove for 5 minutes. The temperature goes from 23.5C to 48.9C. How much heat was absorbed. (s for Al is .900j/g C, s for H2O is 4.184 j/g C) I go...

**Chemistry**

I want to see if i got my answer correct for #1 but I need help on #2 1.A 150g aluminum pan containing 500g of water is heated on a stove for 5 minutes. The temperature goes from 23.5C to 48.9C. How much heat was absorbed. (s for Al is .900j/g C, s for H2O is 4.184 j/g C) I go...

**Physics**

In 1996, the Fiberoptic Link Around the Globe (FLAG) was started. It initially involves placing a 27,000 km fiber optic cable at the bottom of the Mediterranean Sea and the Indian Ocean. Suppose the index of refraction of this fiber is 1.56. If all reflections occur at the cri...

**Physics**

In 1996, the Fiberoptic Link Around the Globe (FLAG) was started. It initially involves placing a 27,000 km fiber optic cable at the bottom of the Mediterranean Sea and the Indian Ocean. Suppose the index of refraction of this fiber is 1.56. If all reflections occur at the cri...

**history**

Mahanism emphasized: A. The importance of the navy in imperial expansion B. opposition to the new imperialism of the US C. The spread of Christianity to remote nations D. The equality of people who lived in imperial territories

**geometry**

You are given two segments, with AB = 4 and with CD = 7. Explain how you could use only the congruent-segments construction to construct with EF = 1.

**COM / 220**

I need help with the DQ 2 week 2. Could someone help me please?

**sociology **

The general trend of American's attitudes toward the unmarried has been from an attitude of _____ in the 1950s to an attitude of ______ in the 2000s A.) Non-acceptance; acceptance B.) Neutrality; non-acceptance C.) Non-acceptance; neutrality D.) Neutrality; tolerance I thi...

**sociology **

The general trend of American's attitudes toward the unmarried has been from an attitude of _____ in the 1950s to an attitude of ______ in the 2000s A.) Non-acceptance; acceptance B.) Neutrality; non-acceptance C.) Non-acceptance; neutrality D.) Neutrality; tolerance I thi...

**sociology **

The general trend of American's attitudes toward the unmarried had been from an attitude of _________ in the 1950s to and attitude of _________ in the 2000s

**sociology **

The general trend of American's attitudes toward the unmarried had been from an attitude of _________ in the 1950s to and attitude of _________ in the 2000s

**Physics**

a 45N lithograph is supported by two wires. One wire makes a 25 angle with the vertical and the other makes a 15 angle with the vertical. find the tension in each wire

**Math (Help This Will Be on My Test Tomorrow!)**

y= ax^2+bx-4. How would i find the equation of this parabola with the points (0,-4) (1,0) (2,2) (4,0) and 6,-10)?

**math**

how doo i do my my math homeeework:congruence problems.

**Physics**

A proton has a mass of 1.672 X 10 -27 kg. What is its weight? (using 9.81 for gravity)

**CHEMISTRY: DUE TONIGHT. CHECK MY ANSWER?**

1. For the simple decomposition reaction below, rate = k[AB]2 and k = 0.40 L/mols. AB(g) A(g) + B(g) If the initial concentration of AB is 1.60 M, what is [AB] after 13.0 s? ANSWER: (.4)(13)=5.2 1/1.6=.625 5.2-.625=4.575 1/4.575= .2185 I tried .22 & .21. They are both wrong. I...

**spelling **

i need words that end with ant and ance but they have to be the same words like distant/distance

**Stoichiometry**

1. Iron reacts with oxygen according to the following equation: Fe + O2→ Fe2O3 a. Balance the equation. b. Assuming you start with 15.0 g of iron, how many dm3 of oxygen are required to react? c. How many molecules of oxygen is this?

**Biology**

What did Darwin believe is the consequence of overpopulation in animals and plants?

**Biology**

Darwin believed that Malthus' ideas about human populations applied more strongly to animals and plants. Why?

**Physics**

A British company makes optical fibers that are 13.6 km in length. If a beam of light travels along one of those fibers, always reflecting at the critical angle, it will travel 20.3 km. What is the index of refraction of the fiber material?

**chemistry**

how many kg does h2o have

**Physics**

Thank you!

**Physics**

A vat in England nicknamed "Strongbow" is 19.7 m tall, but how wide is it? Suppose the vat is filled with water. A ray of light enters the water from the air at one end of the vat, reflects off the bottom at the vat's center, and exits at the opposite end of the ...

**Physics**

A vat in England nicknamed "Strongbow" is 19.7 m tall, but how wide is it? Suppose the vat is filled with water. A ray of light enters the water from the air at one end of the vat, reflects off the bottom at the vat's center, and exits at the opposite end of the ...

**Physics**

Thanks so much!

**Physics**

The maximum depth of Lake Baikal, in Russia, is 1637 m, making it the world's deepest freshwater lake. If a beam of light with an angle of incidence of 60.0 degrees enters the water from the air, what is the horizontal distance between the point where the light enters the ...

**marketing**

Your manager has asked you to investigate the Internet marketing strategies used by the company's major competitors. Use the library, the Internet, and any other resources to research competitors and prepare a presentation. Here are the questions to address for each of the...

**Math **

How many possible license plates are possible in which two letters are followed by at least 1 digit and no more than 4 digits?

**Physics**

On vacation, your 1200- car pulls a 540- trailer away from a stoplight with an acceleration of 1.50. What is the net force exerted by the car on the trailer?

**Math**

Mr.Jensen is buying 2 dozen donuts for $10.98. True or False. The expression 8.5 x 2/10.98 could be used to represent the cost of 8.5 dozen donuts.

**bookkeeping**

What is the total liabilities and owner’s equity in the balance sheet you prepared in Exam Figure 4?

**U.S History**

Which of the following caused a split in the womens's suffrage campaign? a.Alice Paul's aggressive strategy b.Carrie Champan Catt's "winning plan" c.The decision to press for a constitutional amendment d.world war 1

**general psychology**

how may psychology be understood as both an art and a science?

**Physics**

A 4.2-kilogram block sliding down a ramp from a height of 4.5 meters above the ground reaches the ground with a kinetic energy of 33 joules. The total work done by friction on the block as it slides down the ramp is approximately:

**chemistry**

An aqueous solution of nacl has a mole fraction of 0.21. What is the mass of NaCl dissolved in 100.0 mL of solution?

**Chemistry**

An unknown element Q has two known isotopes: 60Q and 63Q. If the average atomic mass is 60.5 amu, what are the relative percentages of the isotopes?

**Chemistry**

An unknown element Q has two known isotopes: 60Q and 63Q. If the average atomic mass is 60.5 amu, what are the relative percentages of the isotopes?

**chemistry**

the shape and nonding in a Br2 molecule is best described as

**chemistry**

if you mix 50ml of 0.1 tris acid with 60ml if 0.2m tris base, what will be the resulting pH?

**chemistry**

If the solubility of a particular solute is (10 g/100 g H2O) at 20°C, what solution concentration would represent a supersaturated aqueous solution of that solute?

**accounting**

Connection Station, an internet café, had the following operating activities during the month of May: 1. Bought 800 in jump drives and disks, which are available for resale from Office Depot on credit 2. Paid 900 in utilities for the month of may 3. Paid 2000 rent for t...

**Socials Studies**

The puritans had a long-lasting effect on English society and, to some extent, our own. What would be some aspects of society today that seem "puritan" in origin? I really need help on this.. Please, and thank you :-)

**intro to chemistry**

how to come come up with a significant digits poam

**chemistry**

how do i come up with POEM about significant digits please help

**algebra**

yes

**Physics**

4.407

**physics**

A football is kicked with an initial speed of 18 m/s at an angle of 36 degrees above the horizontal. (a) What is the maximum height that it reaches? (b) At what time does it land? (c) How far horizontally does it travel?

**physics**

A 59.0-Ω resistor is connected in parallel with a 116.0-Ω resistor. This parallel group is connected in series with a 15.0-Ω resistor. The total combination is connected across a 15.0-V battery. (a) Find the current in the 116.0-Ω resistor. ______A (b) Find...

**childcare**

ALL WRONG EXCEPT FOR A FEW !!!! WTF ITS CALLED HOMEWORK HELP FOR A REASON

**algebra**

1-2x-5=4x+2

**chemistry**

1. If a gaseous sample contains 73% N2 by volume, what is the solubility of N2 in water at 25°C and 1.0 atm (kH in H2O at 25°C = 7.0 10-4 mol/Latm)? 2. Calculate the vapor pressure of a solution of 0.60 mol of cholesterol in 4.5 mol of toluene at 32°C. Pure toluene...

**Physics**

how do i solve for time when i don't know initial velocity?

**Physics**

A ball is thrown horizontally from the top of a building 55.4 m high. The ball strikes the ground at a point 65 m from the base of the building. The acceleration of gravity is 9.8 m/s2 . Find the time the ball is in motion in seconds.

**Physical science**

A ball thrown upward reaches a height of 13m. How much time did it take to get to this height? How much time will take to fall to the ground?

**physics**

A car moving at 10m/s when it begins to be accelerated at 2.5m/s^2. (a)How long does the car take to reach a speed of 25m/s? (b) How far does it go during this period

**Chemistry**

A 0.75 L bottle is cleaned, dried, and closed in a room where the air is 20°C and 42% relative humidity (that is, the water vapor in the air is 0.42 of the equilibrium vapor pressure at 20°C). The bottle is brought outside and stored at 0.0°C. (See Table 5.2) (a) W...

**AP Chemistry **

The answer is 50.0 torr and I got 46.0 torr but idk what I did wrong. Find the vapor pressure of a solution of 164 g of C3H8O3 and 338 mL of water at 39.8 degrees Celsius. Water's VP at 39.8 degrees celsius is 54.74 torr; it's density is 0.992 g/mL.

**chemistry**

how do you find the rate of production when you already know the rate of consumption? kinetics questions

**English**

Can you tellion. me what to put in this sentence? (comma, semicolons, hyphens, colons) 1. Thank you Dr. Smith for seeing this patient in pulmonary consulat

**physics**

A steel ball is dropped from a diving platform (with an initial velocity of zero). Use the approximate value of g = 10 m/s2. (a) Through what distance does the ball fall in the first 1.5 seconds of its flight? (b) How far does it fall in the first 4 seconds of its flight?

**math **

after school chase spends 20 min reading 30 min practicing the piano 15 min cleaning his room, and 40 min doing his homework, chase is busy for 105 min what fraction of the time does he spend cleaning his room?

**MATH**

determine the sum of: 50 over Σ 8(.5)^n-2 n=1

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