Friday

October 31, 2014

October 31, 2014

Total # Posts: 2,820

**Physics**

PLEASE HELP! ITS URGENT!
*May 12, 2011*

**Physics**

A Saturn V rocket with an Apollo spacecraft attached has a combined mass of 2.1 105 kg and will reach a speed of 11.2 km/s. How much kinetic energy will it then have?
*May 12, 2011*

**Math**

Please help simplify this problem. Its Kinda hard. 8-5/8+1/2*6/9 Thanks
*May 11, 2011*

**Algebra**

I've tried and tried and just can't do it. Please help solve this problem. 16-2(8w-7)=3w-18(2-w)
*May 11, 2011*

**Physics**

What do you mean with the inverse?
*May 10, 2011*

**Physics**

A body of mass m moves under the influence of force F(r). Given it's trayectory r(t), find F(r).
*May 10, 2011*

**Physics**

Aristotle is sometimes quoted as claiming that a body falls at a speed proportional to its mass. Let us suppose that Aristotle’s experience was based on objects falling in air (with turbulent flow drag) essentially at their terminal speeds. a. If Aristotle were ...
*May 10, 2011*

**Physics**

A body of mass m moves under the influence of force F(r). Given it's trayectory r(t), find F(r).
*May 10, 2011*

**Physics**

Aristotle is sometimes quoted as claiming that a body falls at a speed proportional to its mass. Let us suppose that Aristotle’s experience was based on objects falling in air (with turbulent flow drag) essentially at their terminal speeds. a. If Aristotle were ...
*May 10, 2011*

**Physics**

A body of mass m moves under the influence of force F(r). Given it's trayectory r(t), find F(r).
*May 10, 2011*

**Physics**

Aristotle is sometimes quoted as claiming that a body falls at a speed proportional to its mass. Let us suppose that Aristotle’s experience was based on objects falling in air (with turbulent flow drag) essentially at their terminal speeds. a. If Aristotle were ...
*May 10, 2011*

**Biology 1**

What is a Biochemical cycle and why is it important? Give at least one example.
*May 9, 2011*

**chemistry**

the volume ratio between the two gases should have been exactly 2:1. What physical property of either gas might explain the difference between the observed ratio (before rounding) and the theoretical value?
*May 4, 2011*

**Math**

Kelsey has 6 coins. 1/3 of her coins are dimes. The value of the dimes is one-fourth the value of the coins. How much money does Kelsey have?
*May 2, 2011*

**Brief Calculus**

Thanks Guys!
*May 2, 2011*

**Brief Calculus**

Decide on what substitution to use, and then evaluate the given integral using a substitution. HINT [See Example 1.] (Round your decimal coefficients to four decimal places.) x/(2x^2 − 1)^0.4 dx
*May 2, 2011*

**Algebra**

solve the eauation check for extraneous solutions. log5 x=4
*April 30, 2011*

**Chemistry**

we were asked to find the enthalpy change because it is an exothermic reaction. Dont i have to convert cm^3 into dm^3 in the equation?when i divide the Heat energy with the number of moles in order to get enthalpy change do i put the moles of the limiting reagent?
*April 30, 2011*

**Chemistry**

So I am writing a lab report and Im stuck with calculating the enthalpy change of combustion of the following reaction: Mg+2HCl--> MgCl2+H2 .I am given the mass of Mg which is 5g and the concentration of HCl which is 2M and the volume of HCl which is 50 cm^3.I found the ...
*April 30, 2011*

**precalc**

How do you solve log5 sqrt125?
*April 26, 2011*

**Algebra 1**

-3t/t^3-t^2
*April 24, 2011*

**english**

Neither her associates nor the doctor __________ the surgery is necessary. thinks think
*April 22, 2011*

**geometry**

x^2=y^2-6x+8y=10 what shape is this?
*April 21, 2011*

**chemistry**

What is the lewis dot diagram for menthol? (C10H20O1)
*April 21, 2011*

**Physics**

I've been stuck on this problem for a while. Im not sure where to even begin. A bike wheel is rotating with an angular velocity of 3.1 rev/s. If the coefficient of kinetic friction between the wheel and brakes is .87, then find the revolutions the wheel makes in coming to ...
*April 21, 2011*

**algebra**

which expression is the equivalent of 3x+2y+8−9?
*April 20, 2011*

**Integrated Physics and Chemistry**

The internal energy of a material is determined by.. A)its temperature B)the kinetic energy of its molecules C)the potential energy of its molecules D)the combined amount of kinetic and potential energy of its molecules
*April 19, 2011*

**Integrated Physics and Chemistry**

a baby pushes a toy across the floor with a force of 5 newtons.which is this a example of balanced force,interia,ubalanced force,or velocity?
*April 19, 2011*

**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 ...
*April 19, 2011*

**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
*April 19, 2011*

**math**

Please more help
*April 18, 2011*

**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?
*April 18, 2011*

**math**

In triangle ABC if <A and <B are acute angles and sin 10/13 , what is the value of cos A?
*April 18, 2011*

**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
*April 18, 2011*

**chemistry**

What would be the best technique to separate a soluble solid from a solution, like separating salt from a mixture of salt water?
*April 17, 2011*

**Social Studies**

ICIZENTS-people who have the right to participate in goverment
*April 14, 2011*

**algerbra 2**

if the sum of the focal radii of this ellipse is 12 what is the value of a^2?
*April 13, 2011*

**algerbra 2 **

given that a parabola has a directix of =-3.25 and focus of (0,-2.75) find the vertex
*April 13, 2011*

**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 ...
*April 12, 2011*

**math**

how do you remember mixed numbers and improper fractions?
*April 11, 2011*

**hsm210**

What are some concerns about the current state of the human service industry?
*April 10, 2011*

**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?
*April 6, 2011*

**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 ...
*April 4, 2011*

**Hcs341**

Please someone help me this was due yesterday
*April 3, 2011*

**Hcs341**

I would love a reference for description of the process for tracking and evaluating training effectivness.
*April 3, 2011*

**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
*April 3, 2011*

**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.
*April 3, 2011*

**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
*April 3, 2011*

**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
*April 3, 2011*

**physics**

0.11
*March 31, 2011*

**Chem**

Sorry but i figured it out.
*March 31, 2011*

**Chem**

Still not understanding on how to set up the problem to get the answer.
*March 31, 2011*

**Math**

114
*March 29, 2011*

**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...
*March 28, 2011*

**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.
*March 27, 2011*

**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?
*March 24, 2011*

**6th grade math**

my answer is 5554 gallons
*March 24, 2011*

**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...
*March 23, 2011*

**geometry**

Given that BD Û AC, which of the following statements is NOT necessarily true?
*March 21, 2011*

**MATH**

DETERMINE WETHER (7,-2)IS A SOULTION FOR 3X-2Y=14
*March 18, 2011*

**Chemistry**

Waht is the mass in mg of 0.016 moles of glucose (C6H12O6)?
*March 15, 2011*

**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
*March 14, 2011*

**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.
*March 14, 2011*

**math**

30 - 19 1/3
*March 13, 2011*

**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 ...
*March 8, 2011*

**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 ...
*March 8, 2011*

**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 ...
*March 6, 2011*

**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 ...
*March 6, 2011*

**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
*March 6, 2011*

**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.
*March 3, 2011*

**COM / 220**

I need help with the DQ 2 week 2. Could someone help me please?
*March 1, 2011*

**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 ...
*March 1, 2011*

**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 ...
*March 1, 2011*

**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
*March 1, 2011*

**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
*March 1, 2011*

**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
*February 25, 2011*

**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)?
*February 24, 2011*

**math**

how doo i do my my math homeeework:congruence problems.
*February 24, 2011*

**Physics**

A proton has a mass of 1.672 X 10 -27 kg. What is its weight? (using 9.81 for gravity)
*February 23, 2011*

**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...
*February 23, 2011*

**spelling **

i need words that end with ant and ance but they have to be the same words like distant/distance
*February 23, 2011*

**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?
*February 22, 2011*

**Biology**

What did Darwin believe is the consequence of overpopulation in animals and plants?
*February 22, 2011*

**Biology**

Darwin believed that Malthus' ideas about human populations applied more strongly to animals and plants. Why?
*February 22, 2011*

**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?
*February 20, 2011*

**chemistry**

how many kg does h2o have
*February 19, 2011*

**Chemistry**

Number 4
*February 19, 2011*

**Physics**

Thank you!
*February 19, 2011*

**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 ...
*February 19, 2011*

**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 ...
*February 19, 2011*

**Physics**

Thanks so much!
*February 19, 2011*

**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 ...
*February 19, 2011*

**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...
*February 17, 2011*

**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?
*February 17, 2011*

**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?
*February 17, 2011*

**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.
*February 16, 2011*

**bookkeeping**

What is the total liabilities and owner’s equity in the balance sheet you prepared in Exam Figure 4?
*February 15, 2011*

**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
*February 13, 2011*

**general psychology**

how may psychology be understood as both an art and a science?
*February 13, 2011*

**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:
*February 13, 2011*

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