Saturday
October 25, 2014

Posts by Emily


Total # Posts: 2,343

Physics
The work function for potassium is 2.24eV. If potassium metal is illuminated with light of wavelength 310 nm, find the maximum kinetic energy of the photoelectrons. I have tried everything and still keep getting the wrong answer. The speed of light is 3 × 108 and Planck...
April 13, 2010

fraction comparisons
Max did 19 situps. This is 1/7 as many as Isabel. How many situps did Isabel do?
April 12, 2010

chemistry
help me. i dont understand
April 11, 2010

chemistry
Excess florine, F2(g) reacts at 150 degrees celius with bromine, Br2(g) to give the compound BrF(n). If 423 mL of Br2 at 150 Degrees and 748mmHg produced $.20 g BrF(n), what is it? describe the bonding in the molecule, using valence bond theory.
April 8, 2010

grammer
Yesy the correct one is 3. The conjunction in that sentence is for. A conjunction links sentences together. There is always a comma before a conjunction.
April 8, 2010

geometry
y= 24
April 8, 2010

MATH
It is a well-known fact that homing pigeons fly faster over land than over water. Assume that they fly at 10 metres per second over land, and only 8 metres per second over water. A pigeon is located at the edge of a straight river bank, 500 metres wide, and must fly to its ...
April 8, 2010

geometry
If a circle has a diameter of 2 3/8 inches, then what is the length of the radius?
April 5, 2010

algebra
Find the minimum and maximum values of the objective function subject to the given constraints? Objective Function: C=4x+5y Constraints: x>=0, y>=0, x+y<=6
April 4, 2010

math
you work at a grocery store. your hourly wage is greater after 6pm than it is during the day. one week you work 20 daytime hours and 12 evening hours and earn $280. another week you work 30 daytime hours and 12 evening hours and earn a total of %276. what is your daytime rate...
April 2, 2010

math
during a recent telethon people pledged $25 or $50. twice as many people pledged $25 as $50. altogether, $18000 was pledged. how many people pledged $25?
April 2, 2010

Help me think of ideas for my essay?
My thesis statement for my synthesis essay to connect The Grapes of Wrath, The Great Gatsby and The Death of a Salesman is "It is impossible to maintain honor and also achieve success." Could anybody give me any ideas for my 3 body paragraphs I'm having trouble ...
April 1, 2010

Chemisty
calculate pH of 50.0 mL of a .100 M solution of the weak monoprotic acid HX
March 29, 2010

Chemistry
When you balance equations, do you treat polyatomic ions as one unit or treat the different elements in the ion separately? Because if you treat them as one unit, then what if the elements get separated in the products side of the equation?
March 27, 2010

Physics
i need help on this problem too
March 26, 2010

9th grade
soil dwelling insects are examples of invertabrates. explain why this statement is true and use examples of two soil dwelling insects
March 23, 2010

Civics
Are there any reliable websites that would give information and statistics on improvements that should be made to Immigration Canada?
March 21, 2010

science
I am doing a project on the Silurian time period and we need to know some organisms that were created during the time and some that went extinct. I found a bunch that were created but i didnt find any that went extinct!! Help!!
March 16, 2010

math
5 x (x + 2y) - (5x +2y) + y(2x + z) translate into a word phase.
March 12, 2010

physics
A 250. MW coal-fired power plant burns fuel with an energy density of 35.0 MJ kg-1. Water enters the temp reduction tower at 293 K and leaves at 350. K at a rate of 4200. kg s-1. 4. Calculate the energy removed by the water each second. 5. Calculate the energy produced by the ...
March 11, 2010

4gr math
6/87
March 7, 2010

4th grade math
write and solve a mixed number word problem
March 4, 2010

fractions
Claire cut some apples into eights. She ate all but 17 pieces. how many whole apples and parts of apples did she have left over?
March 3, 2010

fractions
Castor brought 6 3/4 cakes to share with 26 students. Did Castor bring enough for each student to have 1/4 of a cake? Explain your thinking and show your work
March 2, 2010

Math Analysis
From a ship off-shore, the angle of elevation of a hill is 1.1°. After the ship moves inland at 4.5 knots for 20 min, the angle of elevation is 1.4°. How high is the hill? (1 knot = 1 nautical mile = 6080 ft per hour) As I was just about to get the answer, I realized ...
March 2, 2010

4th grade
4/5682
March 1, 2010

science
I figured out the other three questions but im stuck on this one... If you digest an entire human genome with a restriction enzyme you get a blurry smear in the lane of the gel. Why?
March 1, 2010

science
What type of organism makes restriction enzymes? How did restriction enzymes evolve? How do scientists use restriction enzymes? If you digest an entire human genome with a restriction enzyme you get a blurry smear in the lane of the gel. Why? I have a quiz tomorrow on ...
March 1, 2010

6th grade
Cone u
February 24, 2010

english
"There" is defined as "at or in that place." ex. Sit over there. "They're" is a contraction of the two words "they are." ex. They're sitting on the bench. "Their" is the "possessive form of 'they'." ex...
February 23, 2010

Honors Chemistry
How does heating or boiling a substance affect its pH?
February 23, 2010

pre calc
You're correct about the numerator. You would simplify the denominator to be x(x-1). So now you have: x(x+2) ------- x(x-1) You can cancel out the x's on both the numerator and denominator, and so for your final answer you would have: (x+2) ------ (x-1) Does this make ...
February 23, 2010

Algebra 2
Both the numerator and denominator have the same bases for the exponents, right? So, dividing these two variables is the same as subtracting the exponents, like: n^(3-¨i)
February 23, 2010

Honors Chemistry
Ohhh I see. This makes more sense. Thank you! :)
February 23, 2010

Honors Chemistry
If 20 mL of 0.01 M aqueous HCl is required to neutralize 30 mL of an aqueous solution of NaOH, determine the molarity of the NaOH solution. ==> I got 0.01 M NaOH as my answer. Is this correct?
February 23, 2010

Honors Chemistry
I don't exactly understand this question -- can someone maybe explain it to me please? 6) Suppose you have an NaOH solution of unknown concentration. Name three possible substances that could be used in "known" solutions to titrate the NaOH solutions.
February 23, 2010

Math
In right triangle ABC, altitude CD is drawn to hypotenuse AB. If AD equals 4 and AC exceeds DB by 1, find DB. It is from a worksheet about proportions in a right triangle.
February 21, 2010

pre-Algebra
Sorry, struggling through pre-Algebra .. :-( .. How do i figure out 5x = -20 ?
February 19, 2010

Pre-Algebra ... again :-(
Thank you Miss Rose!
February 19, 2010

Pre-Algebra ... again :-(
How do i go about finding the integers of a product and quotient ... like, product of -20 whose quotient is -5 ..... thanks again
February 19, 2010

Math Pre-Algebra
Gotcha ... makes sense to me! :-) ... thank you! ... i may be back! :-)
February 19, 2010

Math Pre-Algebra
What is the value of 1 raised to a negative exponent? ... Maybe an example would help me better understand. Thank you very much ... I know it is like a fraction
February 19, 2010

Data management
The camera club has 5 members, and the math club has 8 members. There is only one member common to both clubs. In how many ways could a committee of 4 people be formed with at least 1 member from each group?
February 17, 2010

chemistry
is the correct answer 68.93kJ?
February 16, 2010

chemistry
Given that the specific heat capacities of ice and steam are 2.06 J/g°C and 2.03 J/g°C, the molar heats of fusion and vaporization for water are 6.02 kJ/mol and 40.6 kJ/mol, respectively, and the specific heat capacity of water is 4.18 J/g°C, calculate the total ...
February 16, 2010

chemistry
What quantity of heat is required to vaporize 32.5 g of liquid water at 100°C?
February 16, 2010

Ecology
How does the skin and life cycle of a frog help indicate the health of local ecosystems?
February 13, 2010

cal 2
Find the number b such that the line y = b divides the region bounded by the curves y = x2 and y = 16 into two regions with equal area. (Round your answer to the nearest hundredth.)
February 12, 2010

Science
Plants, cows and humans use the same amino acids to make up their proteins and yet the proteins are very different. Why?? Could a plant make a human protein if we could splice a human protein gene into the plant's genome? Why? ----Those questions are from a lab we did, i ...
February 11, 2010

English
We are doing this group project where we have to teach the class our vocab words. My job for the project is to make big flashcards with pictures of the words on it. One of the words is vignette, and I have no idea what picture to use, the definition is short verbal description...
February 10, 2010

gr. 10 physics
I must find the speed of an object, the infermation that is given to me is:n height: 0.10 kinetic energy: 0.50 time travel o.72 (m/s squared). i belive that speed = 0.3... is this correct?
February 9, 2010

Yr 10 English - Poetry
What were the hobbies (if any) of Nobel Prize winning poet Seamus Heaney? I searched everywhere and couldn't find anything. . .
February 8, 2010

algebra
x - = 12 3
February 3, 2010

English- Mrs.Sue Please
Hello Im am stuck on these sentence things and we have to say if it is a preposition, verb, pronoun, conjunction ect. what do I do?
February 1, 2010

Spanish
how do you make comparisions use equality and superlatives?
January 26, 2010

CP Science 9th grade
A Sample of Air at 35 degrees Celsius has a relative humidity of 15%. How do you find the dew point temperature?
January 26, 2010

FIN200- FV, PV and Annuity Due CP
Take the $95. Assuming you take the $95 and compound it daily at an annual rate of 12% for 50 years you would have $38,287.96 which is obviously more than $30,000.
January 26, 2010

Literary Analysis and Composition
Hey, I was trying to figure out some similarities between the Stories Barrio Boy by Ernesto Galarza and No Gumption by Russell Baker. I got some, but I am supposed to make a four paragraph essay out of it. It would be great if you could list some similarities and differences. ...
January 22, 2010

Literary Analysis and Composition
thanks! i got a B+ (88.2%)
January 21, 2010

Literary Analysis and Composition
Sorry, Apparently the last post i did didnt show my selections. Please check these answers for me. Thanks 1. Works such as "To Build a Fire" gave Naturalist writers such as Jack London a platform to argue that (Points: 5) human wisdom ingenuity can solve all problems...
January 21, 2010

Literary Analysis and Composition
Could you check my work for me? and please hurry, i have 40 minutes left to complete. Thanks so much! 1. Works such as "To Build a Fire" gave Naturalist writers such as Jack London a platform to argue that (Points: 5) human wisdom ingenuity can solve all problems. ...
January 21, 2010

Literary Analysis and Composition
Could you please check my answers? Thanks! 10. Identify how each gerund or gerund phrase is used in the sentence. All units will remain here for processing. (Points: 3) subject direct object predicate nominative X object of a preposition 11. Identify how each gerund or gerund ...
January 20, 2010

Literary Analysis and Composition
Please help me out with this question! I am still trying to understand participle phrases. Write the first and last word of the participial phrase. We studied the notes, including all the lectures and outlines.
January 20, 2010

social studies
how did geography affect the italian peninsula?
January 14, 2010

Precalculus
Can someone check my answers please? Thank you :) 30. What is Earth's rotational speed at (a) Bangor, Maine (latitude 45 degrees N) and (b) Rio de Janeiro, Brazil (latitude 23 degrees S)? (It's given in the problem also that Earth's rotational speed at the equator ...
January 13, 2010

Math Analysis
What is the approximate horizontal distance traveled by a soccer ball that is kicked at an angle of 30 degrees with an initial speed of 60 feet per second? a) 84 ft b) 88 ft c) 93 ft d) 97 ft e) 105 ft ==> I tried solving it by solving for x in the equation cos30 = x/60, x ...
January 10, 2010

algebra
How do you write equations for 4 lines that intersect to form the sides of a parallelogram? What must be true about such lines?
January 10, 2010

Geography
Ms. Sue sounds like she was having an off day... ^^^
January 7, 2010

MATH!!
The slope of a line segment AB is 2. The coordinates of the endpoints of the line segment are A(-2,11) and (X,7). Determine the value for X.
January 7, 2010

Math Analysis
Ohhhhhh I get it now! I was imagining the scenario in a completely different way. Thank you!
January 6, 2010

Math Analysis
What is the apparent size of an object 1 cm long held 80 cm from your eyes? ==> When they say "apparent size", they mean the angle from which one object is viewed by, say, a person (or in this case a pair of eyes). I thought I'd be able to find the angle by ...
January 6, 2010

English
Thank you so much Ms. Sue!!
January 5, 2010

English
I need help with prepositional phrases. I’m given sentences and I’m supposed to rewrite them changing the position of the prepositional phrases so that the sentences are not confusing. If they are already correct, I’m supposed to write correct. I made ...
January 5, 2010

English
I need help with prepositional phrases. I’m given sentences and I’m supposed to rewrite them changing the position of the prepositional phrases so that the sentences are not confusing. If they are already correct, I’m supposed to write correct. I was wondering ...
January 5, 2010

10th grade
I am writing an essay on things from the natural world and I need to think of categories for the things in order to write paragraphs. The sun, moon, sea, and sea shore are all things from the natural world. What one smaller category do they fit in?
January 3, 2010

English
I am writing an essay on things from the natural world and I need to think of categories for the things in order to write paragraphs. The sun, moon, sea, and sea shore are all things from the natural world. What one smaller category do they fit in?
January 2, 2010

Pre Cal
If log 3=A and log 5=B express Log 75 in terms of A and B. (using the Law of Exponents)
December 22, 2009

Precalculus
If f(x) = ab^x where a > 0, b > 0, and b is not equal to 1, then b is called the _______________ of the exponential function. Any help is greatly appreciated!! :)
December 14, 2009

Math
It helps to draw out what the photo in the frame will look like, so you'll draw a rectangle with length "L" and width of "L + 2" (because it says the width [think w] is 2 more than the length "L"). Now, it says a border of 1 in. is placed ...
December 14, 2009

Math -- HELP!!!!
y + 5y = 90 6y = 90 y = ? Divide each side by 6 and you get your answer.
December 10, 2009

Math Analysis
31. Radioactive decay of material is determined using the formula N = Noe^-kt. Find the constant k for Plutonium-239 given that its half-life is 24,390 years. ==> I don't really get where to start here because the problem does not give you how much Plutonium-239 there ...
December 10, 2009

math
What's your question?
December 10, 2009

math
You're welcome! :)
December 10, 2009

math
I mean the piece he has is 1/2 yard long, not half of the 3/4-yard one. oops sorry! lol
December 10, 2009

math
Yep! :)
December 10, 2009

math
Multiply 3/4 by 2/3 to get the piece Robert needs: (3/4) * (2/3) = ? If you don't have a calculator, cross multiply so the 3s cancel out and the 2 goes into the 4 twice...leaving you with an answer of?
December 10, 2009

math
An ordered pair consists of an x-coordinate and a y-coordinate, like (x,y). Sooo, you can just start picking random values for x and plugging it in to the equation to get a y value. For example, if you were to plug in 3 for x, you would get: y = 20 + x/3 y = 20 + 3/3 y = 20 + ...
December 10, 2009

9th grade
Convert milligrams to grams to make it easier: 1 milligram = 0.001 gram Convert kilograms to grams as well so you have the same units: 1 kilogram = 1000 grams Divide kilograms (1000 grams) by milligrams (0.001 grams) to get your answer.
December 10, 2009

algebra
In this case I would use the method of synthetic substitution, but since I never learned this technique 'til this year in Precalculus, let's stick with long division: 1) Write out the problem like an elementary division problem, with the bar over the 4m^2-9m^2...+7 and...
December 10, 2009

Physics
1-A car is lifted a certain distance in a service station and therefore has potential energy with respect to the floor. If it were lifted twice as high, how much potential energy would it have? Answer: twice as much 2-Two cars, one twice as heavy as the other, are lifted to ...
December 9, 2009

Social Studies?
What were churches like in England/Britan during the 1800's?
December 9, 2009

Physics
if a car travels at 50 km/h, it has kinetic energy. How much more kinetic energy does it have at 100 km/h? Answer=100 squared as much (10000)
December 9, 2009

Physics
1-A car is lifted a certain distance in a service station and therefore has potential energy with respect to the floor. If it were lifted twice as high, how much potential energy would it have? Answer: twice as much 2-Two cars, one twice as heavy as the other, are lifted to ...
December 9, 2009

Precalculus
Ohhh I see. Thanks Reiny this helped a lot!! :)
December 8, 2009

Precalculus
Solve the equation x^3 - 2x + 4 = 0. ==> I know the answer is -2, but I can't seem to remember how to solve these by hand without using a graphing calculator. Any help is greatly appreciated!! :)
December 8, 2009

english
good, great, nice, and wonderful.
December 8, 2009

Math
This is the question given: "Peanuts sell for $5/kg and cashews for $20/kg. Mary wants to sell a mixture of peanuts and cashews for $12/kg. How many kilograms of peanuts and cashews would Mary have to mix in order to make 30kg of the $12/kg mixture?" This is an ...
December 8, 2009

Precalculus
Ohh never mind, I found my error. I feel kinda stupid now though lol
December 7, 2009

Precalculus
Find the vertex, focus, and axis of symmetry of the parabola x^2-10x-8y+29 = 0. ==> I do it over and over and over, but I keep getting the same answers of (5,4) for the vertex, (5,6) for the focus, and x = 5 for the LOS, but according to this one website, everything except ...
December 7, 2009

English
I need help identifying verbs in a passive and active voice. 1. Masai, a people of East Africa, live in kraals, or small villages. (Verb=live, A) 2. The village is surrounded by a thick round fence. (verb=is surrounded, P) 3. The kraal contains about 10 to 20 small huts. (verb...
December 5, 2009

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