Sunday
April 20, 2014

Posts by Brittany


Total # Posts: 823

Chemistry
A 26.7 g sample of ethylene glycol, a car radiator coolant, loses 668 J of heat. What was the initial temperature of ethylene glycol if the final temperature is 32.5°C (c of ethylene glycol = 2.42 J/gK)?

Chemistry
One piece of copper jewelry at 101°C has exactly twice the mass of another piece, which is at 36.0°C. Both pieces are placed inside a calorimeter whose heat capacity is negligible. What is the final temperature inside the calorimeter (c of copper = 0.387 J/gK)?

Chemistry
A 26.7 g sample of ethylene glycol, a car radiator coolant, loses 668 J of heat. What was the initial temperature of ethylene glycol if the final temperature is 32.5°C (c of ethylene glycol = 2.42 J/gK)?

Trig
A force of 323 newtons makes an angle of 54 degrees and 20 minutes with a second force. The resultant of the two forces makes an angle of 39 degrees forty minutes with the first force. Find the magnitude of the second force. I have the answer, 814.3022, but I need to know how ...

HELP! INTRO TO ECO
Why do supply curves slope upward from left to right? Why don't we sometimes draw them sloping downward from left to right? Under what conditions would it be sensible to draw a supply curve that is horizontal(perfectly elastic)? Under what conditions would it be sensible t...

Intro to Eco Help
supply curves slop upward to the right because.. higher prices attract resources from other uses?

ECONOMICS HELP
a draft system, whether professional sports or the military, enable those who are hiring to A.avoid paying a living wage B.produce what they produce at a lower cost C.educe the cost of labor D.transfer part of the cost of labor to someone other than themselves isnt B the corre...

ECONOMICS HELP
a draft system, whether professional sports or the military, enable those who are hiring to A.avoid paying a living wage B.produce what they produce at a lower cost C.educe the cost of labor D.transfer part of the cost of labor to someone other than themselves isnt B the corr...

intro to economics
a draft system, whether professional sports or the military, enable those who are hiring to A.avoid paying a living wage B.produce what they produce at a lower cost C.educe the cost of labor D.transfer part of the cost of labor to someone other than themselves isnt B the corre...

Intro to ECONOMICS
the basic reason suburban stores are more likely than downtown stores to provide free parking for their customers is that.. the cost of using land is higher in the downtown area?

economics
i dont think it would

economics
oh okay that makes it a lot clearer to me and that means it would decrease the demand for corn

economics
so its a, it has no effect?

INTRO TO ECO
Opportunity-cost theory suggests that the cost to an airline of letting its employees fly at no charge... A.is greater around the Christmas holidays B.will depend upon the value employees place upon travel C.zero D.depends upon alternatives avaliable to the employees is it c?

Intro to Economics
c?

Intro to Economics
Past expenses are irrelevant to decisions to supply now, because A.people forget the past quickly B.it is esssential to avoid bankruptcy C.supply decisions depend on opportunities thst will have to be forgone, not opportunities already forgone D.expenses incurred in the past n...

college
it must claim something specfic so i chose the leaves, i wanna talk about how they change colors or what the change of colors mean

college
what is a good thesis about autumn leaves, so i can write my parpagraph

PHYSICS
90 degrees of a circle is 1/4 the Circumference. Therefore it takes 0.49s to travel 1/4 of the way. Multiply .49 by 4 to receive the total amount of time it takes to make one revolution. To find velocity, find the circumference (2*r*pi). Divide the circumference by the time to...

11th grade
How would I solve the following equation for x? 2 sin^2(x) + 3 tanx secx = 2 I've tried the problems from different approaches, but couldn't come up with a solution. Could you please provide your thought process. It would be greatly appreciated. Thanks!

Language Arts
four definitions of the word nice that you would use in a paragraph to develop this topic sentence: "The word nice is surprisingly ambiguous"

physics 2
In this case, because you are beyond the surface of the sphere you should be able to treat it like a point charge.

world history
whatt will cause a population to grow?

Real Estate Management
3. A 50 unit apartment building has 20 – 1bedroom units; 20 – 2 bedroom units; and 10 - 3 bedroom units. The market price for the units is $600, $700, and $850 respectively. There is currently one of each unit vacant. Late fees are $15 and concessions include one mon...

english
indentifying predicate nominatives and predicate adjectives in this sentence.. Do the strawberries on this vine look ripe to you?

organic chemistry
A solution of acetic acid (CH3COOH; Ka = 1.74 x 10-5) was titrated to a final pH of 4.76 by using NaOH solution. What % of acetic acid is converted to sodium acetate (CH3COO-Na+)? Show your method

Math
log(logx)=2

Math
e^2x+2e^x-15=0

Math
log(5x+1)=2+log(2x-3)

physics
10 n

physics
A ball of mass 200 grams is whirled in a circle at the end of a strong 100 cm long rope whose breaking strength is 10 N. Neglecting gravity, the maximum speed of the ball is approximately.

algebra
just plug in what x equals into the top equation and solve for what y equals then you can plug that answer in for y to get x

English Literature
its just worth ten points thank you=)

English Literature
Question: Explain why Beowulf is an epic poem and why Beowulf is an epic hero This is what i have: Beowulf is a national epic or a long narrative poem. It involves a hero, Beowulf, who is larger than life. The poem concerns eternal serious human problems. Beowulf represents na...

English Literature
This is the question:Disucuss three examples of the anglo-saxon belief in fate as shown in Beowulf. This is what i have The anglo saxons believe that fate is the grim view of life. You have no comtrol over life or destiny. Fate is the source that determines the result of event...

English lit.
Discuss history of the english language referring to major language families, branches,periods,changes, etc

English lit
how does achilles enemy differ from beowulfs and gilgameshs

English Literature
Explain why beowulf is an epic poem and why beowulf is an epic hero.

English Literature
Dicuss three examples of the Anglo-Saxon belief in fate as shown in beowulf.

physics
A student drops a ball from the top of a tall building; the ball takes 2.4 to reach the ground. What was the ball’s speed just before hitting the ground? (this is excluding everything like air resistance, etc)

Finance
Hello, I am doing a finance case, Twilight Acre Farms, and I am trying to determine cash flows. I was not given a revenue figure, only that productivity will increase 15% with the new machine. I do not know what to do. It says in the case that excess capacity is worth $35/hour...

geometry
find uw if vw is 5/8 inches

government
write several paragraphs stating advantages and disadvantages to the unitary, confederate, and federal systems of government.

Physics
We can reasonably model a 75 W incandescent light bulb as a sphere 6.0 cm in diameter. Typically, only about 5% of the energy goes to visible light; the rest goes largely to non-visible light infrared radiation. (a) What is the visible light intensity (in W/m^2) at the surface...

Physics
Calculate the power output of a 1.5 fly as it walks straight up a windowpane at 2.2 2 sig figs P= ___W

Physics
ok so this is how i just set up up: .0015(kg) * 9.81 *.0015(m/s)=.0003234 THANKS!

Physics
Calculate the power output of a 1.5 fly as it walks straight up a windowpane at 2.2 P=__W (2 sig figs)

Ethics
That wasn't even my writing. That was the topic given to me for my short paper. I'm pretty lost.. Can anyone help?

Ethics
I have a paper topic for my ethics class and I was wondering anyone could help me to understand it. Maybe dumb it down a bit? would be greatly appreciated. Social relationships are rooted in biological relationships Thus, Sexual relations and content should be carefully regula...

math
find the angle that is coterminal to 525 degrees and lies between 0 degrees and 360 degrees? 165 degrees 255 degrees 195 degrees 345 degrees

History
were can i find info on Washington DC's First Mayor Marion Barry? Other than Wikipedia... Help Please!

HISTORY
Thank You so much Ms.Sue your sites are doing me much help! & Writeteacher Me & My friend are in the same class I recommended this site for him to use for help but thank you for your assumption of "musical names" your very much so wrong. :)

HISTORY
The Civil War and its impact on the District in the late 19th century... Help Please I'm writing an essay and i need info!

accounting
Prepare a journal entry for the purchase of office supplies on October 14 for 9,000, paying $1,800 cash and the remainder on account????????? if anyone knows how to do this can you help me out please!!!! (this is accounting - journal entry for asset purchase)

SCI 162
Case Study: Gayle and Patrick Read the following case study about Gayle and Patrick. You may also click on the Audio: Thinking It Over if you prefer to listen to the case study. After reviewing the case study, answer the questions on below. Gayle and Patrick have been in a mon...

History
a lot died

Math Prob/solving
If a storm window has an area of 315 square inches, which equation can be used to find the dimensions when the window is 6 inches higher than it is wide (x represents height)?

math
$2700 at 9% interest compounded quarterlyfor 4 years

math
Do you go to Connectionsacademy?? i have this test too.. It so hard.... I need these answers if you get them please

english
keep high aspirations moderate expectations and small needs. whats does this means

Physics (Center of Gravity)
In a lab in my physics class, we were supposed to find the CG of my physics teacher. My partner and I had him lie flat on a wooden (assumed uniform) board that was resting on top of two PVC pipes at either end. Since the PVC pipes acted as the base of support, and since things...

PHYSICS- please help! i cant get my last problem
The compound eyes of bees and other insects are highly sensitive to light in the ultraviolet portion of the spectrum, specifically light with wavelengths between 300.0 nm and 400.0 nm. To what frequencies do these wavelengths correspond? (Assume that the speed of light to be 3...

math
If your first 3 exams are worth 60% you get a 70, 68, and 60. Your 4th exam is worth 30% and your attendance is worth 10% you have not missed any days. What is your grade in the class, if you make a 90 or 80 on the final?

spanish
Choose the correct singular form of “las universidades.” Choose the correct singular form of “los señores.” Choose the correct singular form of “ las mochillas.”

geometry
πd is the circumference of a circle, so with a diameter of 4 a single circle has a circumference of 4π. 1/3 of each circle is in contact with the belt, so that total part is still 4π. Then, the part of the belt connecting from tangent to tangent is 2 radii, so 3...

geometry
Three circles are externally tangent to one another. The radius of each of the circles is 2 cm. A belt fits tightly around the three circles. Find the length of the belt. Express your answer in terms of pi with an explanation.

english
identify is arrived at by the way in which a person faces and uses experiense what does this quote means

social studies
What title did the islams use for their highest learder?

last physics problem!
A ball of mass 522 g starts at rest and slides down a frictionless track, as shown below. It leaves the track horizontally, striking the ground a distance x = 0.93 m from the end of the track after falling a vertical distance h2 = 1.18 m from the end of the track. (a) At what ...

physics problem that i neeeed help with!
i dont understand

physics problem that i neeeed help with!
A person lifts a 3.8 kg cement block a vertical distance 0.9 m and then carries the block horizontally a distance 7.3 m. Determine the work done by the person and by the force of gravity in this process. ? J (by person) ? J (by force of gravity)

physics!!
A flight attendant pulls her 70.0 N flight bag a distance of 263 m along a level airport floor at a constant speed. The force she exerts is 41.0 N at an angle of 52.0° above the horizontal. (b) Find the work done by the force of friction on the flight bag. (c) Find the coe...

physics...
wait what would the answer be to part b im not getting the right answer

physics...
im sorry im having a off day, i see it now

physics...
where did you get the 3.26 in part b? i dont understand that part really...i get the first part though

physics...
Tarzan swings on a 26.2 m long vine initially inclined at an angle of 39° from the vertical. (a) What is his speed at the bottom of the swing if he starts from rest? (b) What is his speed at the bottom of the swing if he starts with an initial speed of 3.26 m/s?

another physics problem that i dont understnad..
oh haha! sorry didnt see it

another physics problem that i dont understnad..
your awesome! but where did you get the 95 in the first equation?

another physics problem that i dont understnad..
An 58.0 N box of clothes is pulled 5.2 m up a 30.0° ramp by a force of 95 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.

PHYSICS WORK PROBLEM due tonight!! please help!
A ball of mass 522 g starts at rest and slides down a frictionless track, as shown below. It leaves the track horizontally, striking the ground a distance x = 0.93 m from the end of the track after falling a vertical distance h2 = 1.18 m from the end of the track. (a) At what ...

11th grade
physics

11th grade
A flight attendant pulls her 70.0 N flight bag a distance of 263 m along a level airport floor at a constant speed. The force she exerts is 41.0 N at an angle of 52.0° above the horizontal. (a) Find the work she does on the flight bag. (b) Find the work done by the force o...

geometry
A ramp to a door is to rise one foot for every five of horizontal distance from the building must the end de placed if the door is 2.3 feet above the ground?

english
what it means to be a black family in the 21 centary

Chemistry
Enter the Net Ionic Equation including phases, for the reaction of AgNO3 and Ba(OH)2.

Social Studies
I need help looking for an interview with Amelia Earhart, written or audio/visual, for a research paper. This is the last citation I need, and I cannot find a direct interview. Please help.

spelling
man :woman :: curved

Medical Terminology
wow, you all are very rude

6th grade
Assume that the average speed of a moving object at 1 m was initial velocity and average spped of your cvart 5 m was its final velocity. calculate the change in velocity of your cart from 1 m to 5m. Show your work

chemistry
An alpha particle (mass = 6.6 × 10-24 g) emitted by radium travels at 3.4 × 107± 0.1 × 107 mi/h. What is its de Broglie wavelength (in meters)?

college philosophy (Mill)
how can mill say that “there is no parity between the feeling of a person for his own opinion, and the feeling of another who is offended at his holding it; no more than between the desire of a thief to take a purse, and the desire of the right owner to keep it”? whi...

12th grade
I need help paraphrazing a section from Robert Browning's poem "My Last Duchess" here it is : Fra Pandolf chanced to say "Her mantle laps Over my lady's wrist too much,"

chemistry
How do I write the skeleton equation representing the heating o f magnesium carbonate to produce solid magnesium oxide and carbon dioxide gas?

5th grade math
rachel was able to average 69 miles per hour on a 9 hour car trip which is the best estimate for the for the number of miles of the 9 hours car trip

hca 270
Lady, you are so rude. Why are you even on this "help" site if all you do is chastise people?

chemistry
If 100 mL of a 3 M solution of sodium hydroxide is diluted to a total volume of 600 mL with distilled water, what will the final concentration of sodium hydroxide be?

statistics
The first class in a relative frequency table is 50–59 and the corresponding relative frequency is 0.2. What does the 0.2 value indicate?

math
Factor the four-term polynomial. mn - 15 + 3m - 5n

Math
Use substitution to solve: 3x-2y=2 x-3y=4

Physics I
23m is wrong

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