Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 288

**Physics**

A bicycle is moving at a constant speed of 12m/s as it covers a distance of 200m. it then applies its brakes and stops over the next 350m. how much time doe sthis total motion take?

**Math**

?? huh

**Math**

6 ways

**Geometry**

how do you solve using midpoint equation if you only have one pair of points? like to use midpoint equation you usually get two points (4,3) and (5,2) but ive been given only one point (3,1). how do i solve for midpoint with only one set of points? help please

**science**

What keeps proteins within the bilayer?

**chemistry 1 **

From data below, calculate the total heat (J) needed to convert 0.757 mol of gaseous ethanol (C2H6O) at 151°C and 1 atm to liquid ethanol at 25.0°C and 1 atm. Boiling point at 1 atm 78.5°C cgas 1.43 J/g·°C cliquid 2.45 J/g·°C ΔH°vap 4...

**physics**

a quarterback throws a pass to a receiver. the release point for the football is 1.8 m above the ground. he projects the ball with a speed of 20 m/s at an angle of 40 above the horizontal. If the pass falls incomplete, how long is it in the air? If the pass falls incomplete, h...

**Math**

simplify 14/22

**Math**

simplify 64/76

**Math**

simplify 13/17

**Math**

Simplify -17/21.

**chemistry**

A piece of copper wire has a density of 8.9 g/cm3. What is the density of a chunk of copper that has a mass of 250 grams?

**geometry**

line segment AB and XY are congruent. if AB=5N-8 and XY= 2n+19 what is the legth of AB?

**chemistry**

what are some examples of suspensions?

**MATH**

20

**Chemistry**

Will you check this answer for me? the half-life of strontium-87 is 2.8hr. What percentage of this isotope will remain after 8 hours and 24 minutes? ?? 34%

**Pre-Calc**

A hall 200 feet in length is to be designed as an ellipse if the foci are 35 feet from the center. How high will the ceiling be from the center?

**Pre-Calc**

A mirror is in the shape of a paraboloid. If a light source is 6 feet from the base along the axis of symmetry and the opening is 12 feet across, how deep should the mirror be?

**math**

Colin is working to earn some money for a new cd player. On Saturday he earned half as much as he did on Sunday, but twice as much as he did on Friday. During those three days he earned $70. How much did he earn each day?

**5th grd math- metric conversion**

30m=6000

**5th grd math- metric conversion**

30m=6000

**probability**

I was asked to find the probaility if a board game uses the deck of 20 cards. And find how many have the number 3. I came up with 4/20 and was told that I'm on the right track but I need to find P(3 and 3) with replacement and without replacement. What does this mean?

**Probability**

How do I determine the probability of selecting a card greater than 9 or a black card?

** probability **

The odds against Paul Phillips winning the 100 yard dash are 7:2. Determine the probability that: • a) Paul wins. • b) Paul does not win. How do I set this up to find out the equation/answer?

**chemistry**

4. Use the pressure of the butane gas (your answer from question #3 above), along with the temperature and volume recorded in the lab, to determine the moles of butane gas collected in the lab. You will use the ideal gas law (and the ideal gas constant, R) for this calculation...

**Math**

Would the set up be [(p-->q)^~p]-->~q

**Math**

If you pass general chemistry, then you can take organic chemistry. You pass general chemistry. ˆ You can take organic chemistry. Let P = you pass general chemistry Let Q = you can take organic chemistry I came up with P - >Q P therefore Q But my set up is wrong,...

**precalc**

f(x)=Log1/3^(9x)find the domain and range.

**chemistry**

consider the following reaction: 2C2H6(g)+7O2 (g)-->4CO2(g)+6H2O (g) delta H = -3120kJ If 3.00g of ethane are burned, how many kJ of heat are produced?

**chemistry**

consider the following reaction: C3H8 (g)+ 5O2 (g)--> 3CO2 (g)+ 4H20 (g) Delta H = -2440kJ The heat of formation of CO2 is -390 kJ/mol and the heat of formation of H2O is -240 kJ/mol. What is the heat of formation of propane?

**chemistry**

the following reaction is carried out in a bomb calorimeter: 4NH3 (g) +5O2 (g)-->4NO (g)+6H2O (g) The calorimeter constant is 45.0kJ/K. when 34.0g of NH3 are reacted in the calorimeter, the temp rises by 10 degrees C. What is the change in energy, delta E, for the rxn?"

**Spanish**

when you are talking in past tense. for example: you went swimming yesterday.

**Chemistry-Help!!**

If I have 10mL of 1.0 M Ba(OH)2 solution and add it to 2.5L of water. What is the concentration of hydroxide ions in the diluted Ba(OH)2 solution?

**Chemistry-Confused!!**

You have 10mL of a 1.0 M Ba(OH)2 solution and add it to 2.5L of water. What is the concentration of hydroxide ions in the diluted Ba(OH)2 solution?

**Chemistry-urgent!**

Yes, but would that give me 63 mL or 250 mL. That's where I get confused.

**Chemistry-urgent!**

What volume of 2.5% (w/v) KOH can be prepared from 125 mL of a 5.0% KOH solution?

**Chemistry/Science - please help!**

An aqueous mixture containing starch (a colloid), NaCl, glucose, and albumin (a colloid) is placed in a dialyzing bag and immersed in distilled water. Which of the following correctly describes the location of the indicated substance after dialysis? A-albumin, inside B-starch ...

**Chemistry**

I'm having trouble with molarity. What is the molarity of a KCl solution made by diluting 75.0 mL of a 0.200 M solution to a final volume of 100.0 mL?

**Math**

Find the present value of the annuity necessary to fund the withdrawal of $600 per month for 10 years, if the annuity earns 2% per year and if there is to be $10,000 to be left in the annuity at the end of the 10 years. (Assume end-of-period withdrawal and compounding at the s...

**Math**

Find the present value of the annuity necessary to fund the withdrawal of $600 per month for 10 years, if the annuity earns 2% per year and if there is to be $10,000 to be left in the annuity at the end of the 10 years. (Assume end-of-period withdrawal and compounding at the s...

**socail studies**

new england colonies 2. what? what happend to the coloonists at roanoke? whta happend to the colony at sagadaco? 5. where? where was roanke? where was sagadahoc? where was james feild?

**math **

what is the perimater of a 90 degree angle multiply by 2 a 17 multiply that answer by 7 add 90 and subtract 23.

**writing**

My teacher said,write 10 sentences 5 for each Paragraph..she said here is your topic. If you would write a speech what would you write it about. Now im not writing a speech im writing i i would write a speech what would i write it on im havinc alot of trouble help please....???

**math**

if you used 2 hundreds, 18 tens, and 4 ones to model a number. what number did you model?

**Chemistry**

A 112 mL solution of 0.351 M HCl is added to 52.0 mL of 0.161 M HCl. What is the new concentration of HCl?

**Chemistry**

what is the concentration of Cl- after adding 250 mL of 0.10 M AlCl3 to 250 mL of 0.30 M Ca(NO3)2

**advanced history**

I need a website that will tell me everything about The Independence Debate:Consequences for the Colonies?

**English**

How do you fix this pronoun agreement. The first theme that the author demonstrates is to not let people with a disability feel abnormal, but for them to use the abilities that they have to help them build their self-confidence.

**Quick ?**

I doing a sample lesson plan for my english class. I want to show a movie that realtes to the book that were reading and the movie is 106 minutes. I teach each class for 50 minutes a day. How many days would it take to finish the movie and how long is 106 minutes?

**Art**

Why is important for children to draw pictures of things that scare them (otherwise what does the child learn from this?

**math**

If you had a fraction strip folded into tenths what fractional lengths could yu measure with the strip?

**math**

The tread life of a particular tire is a random variable best described by a normal distribution with a mean of 60,000 miles and a standard deviation of 2000 miles. What is the probability that a randomly selected tire of this brand will last longer than 58,000 miles? A.0.7266...

**alegebra**

i don't know any i need help asap!

**science**

A ball is dropped from a cliff and has an acceleration of 9.8 m/s2. How long will it take the ball to reach a speed of 24.5 m/s?

**Math**

Mike can mow a lawn in 3 hours. Paul can mow the same lawn in 2 hours. How long would it take both of them working together to mow the lawn? The answer is suppose to be 20/9. This is what I did and I get 9/20. What am i doing wrong? 1.4x+1/5x=1 which gives u 9/20. I'm so l...

**Math**

Solve each inequality algebraically. |2x-1|-2<3 I don't understand how the answer is -2<x<3

**Math**

A student scored 65, 80, 74 on the first three tests during the term. What does the student need to score on the fourth test to ensure and an average score that is above 75?

**math**

How do I start off this equation? Using correct mathematical notation and symbols, express the following in set builder notation: Z = {4, 5, 6, 7, 8, 9, 10, 11}

**math **

Given these sets: A = {1, 2, 3, 4} B = {3, 4, 5, 6, 7} C = {3, 5, 7, 9} List the elements of this set C ¿ (A u B) Do I list the numbers in C that is not in A and B?

**math**

Sealing a Gym Floor A gymnasium floor has an area of 2400 square yards. Each gallon of floor sealant covers an area of 350 square feet. How many gallons of sealant are needed to cover the gymnasium floor? should the equation be set as 2400 sq. yards = 7200 sq. feet 7200 sq ft....

**college mathematics**

how do I set up an equation for this? Lisa has $215 saved. She plans to save $125 every month so that she can have enough money to buy a new sofa. The sofa costs $1498, including tax. How many months will she need to save to be able to buy the sofa?

**college mathematics**

1-1=0 0-2=-2 -2-3=-5 -5-4=-9 -9-5=-14 (would it be this)

**college mathematics**

Use inductive reasoning to predict the next three numbers in the sequence. 1, 0, -2, -5, -9,

**algebra**

Use inductive reasoning to predict the next complete line in the pattern. 10 × 12 = 11 × 13 - 23 12 × 14 = 13 × 15 - 27 14 × 16 = 15 × 17 - 31

**algebra1**

The sears tower in Chicago is 1,454 feet high. suppose you take a sheet of paper and fold it once in half, than fold it in half again,and keep folding it over and over again. How many times would you have to fold it to create a piece of paper that is higher than the sears tower?

**social studies**

What three countries border Egypt?

**Math**

in a subdivison, 67% of the homes have detatched garages, 32% have a patio & 13% have both. What is the probability that a house has a patio if u know that it has a detached garage?

**physics**

im trying to find the speed of a tyrannosaurus rex by alexanders froude number. sp= (square root of)leg length x gravity/ froude number sp=(square root of) 3.5 x 9.8 / 11 i get 1.76 but a t rex cant run/ walk at 1.76 m/s or km/h nothing fits

**Math**

Ya it says How many ounces of each solution should be mixed to prepare the desired perscription? Why is there a 50 in parentheses next to the .54? So once I solve for x what do I do next?

**Math**

A pharmacist is to prepare a 50 fluid ounce solution that contains 54% glucose. The pharmacy has a 30% solution and a 90% solution on hand. How many ounces of each solution should be mixed to prepare the desired perscription?

**Math**

x/2-3=x/5+1 The answer is suppose to be 40/3... I don't know how do this

**English**

why is it important to know the story elements when reading a text and writing a narrative

**English**

How do text and word help me understand the meaning of words while I read and write?

**Math**

How do you solve this equation? The answer is suppose to be -0.7 Thanx for you help. Greatly appreciated -5x\9=7/18

**Science**

yes it is B

**linear system problems**

the base of an isosceles triangle is one third the lenght of each congruent sides the perimeter of the triangle is 84 cm how long is the base?

**French help part 2**

I have a few more if anyone could review them I would be so grateful!!!!! 11.Quand il finira ce cours, il ___D ira____ au Japon. A. va B. est allé C. irait D. ira E. allait 12.Hier, à 9 heures du soir, elle __A a fini______ son devoir. A. a fini B. finit C. finir...

**French help**

Thank you E.G. and Kanon!!!

**French help**

Are these answers correct? Thank you!! 1. Elle voit ses amis au cinéma. Elle ___la___ voit 2. Nous parlons souvent à nos professeurs tous les jours. Nous __les____ parlons tous les jours. 3.Martine va en Chine, Elle _le_____ va pour étudier la culture chin...

**geometry**

if 4, 6, and 10 and 14, 21, and x are the lengths of the corresponding sides of two similar triangles, what is the value of x?

**math**

greatest common factor of 12 numbers less than 40 list each pair

**French question**

Nous ________ cours vers 9 heures a. voulons b. faisons c. allons d. Commençons I can't decide between B and D. Thank you!

**French help please!**

Thank you!!!

**French help please!**

I need help with these two French 101 questions please. Thank you!! Je connais bien Mireille. Je _________ connais depuis 30 ans a. le b. la c. y.....I think this is correct d. lui Marie est une nouvelle étudiante. Hélène lui parle. Choisissez la forme cor...

**Social Studies**

What are the four main natural resources in the united states? and what does silt do to help farmland?

**English**

Can you please just check the grammar in this for me. Thank you Nella Larsen theme is to teach the readers that sometimes it is best to deny ones racial heritage rather than to accept it or identify with it. When it comes to certain situations when race is an issue, the ending...

**English**

What do you mean by one life lesson is strongly related to others?

**English**

Why do some authors have more than one theme to their novel? What is the significance of that?

**Chemistry 101**

Thank you Dr Bob!!!!

**Chemistry 101**

Are these correct? 1. A sample of gases contains three gases at the following pressures: 1.2 atm N2, 3.2 atm O2, and 0.56 atm Xe. What is the total pressure in the container? a. 5.0atm b. 1.4atm c. 2.2atm d. 1.0atm e. 1.7atm I am pretty sure it is A. Is that correct? 2. The mo...

**English**

what are the importance of taboos and why are they used in modern literature. Are taboos considered a characterisc of modernism

**English**

Why are taboos used by authors in their writing?

**French help **

Thank you very much Samantha and Kanon!!!

**French help **

Hi. There is a word missing in this sentence. Would it be pour? Thank you! Le week-end, j’aime aller à la plage ______ faire bronzer et nager mais seulement quand il fait chaud.

**English**

Can you please tell me what this means?I don't understand it at all. Thank you for your help. I hate this type of literature. Modernism is that if everything is based on perception, then history is false; therefore the society emerges from that history is also false. The p...

**French help part 2**

Thank you for the help. I don't understand the question for #1 either.

**French help part 2**

Hi. I am trying for an A in my French class and every point counts. I would appreciate any feedback on my answers. Thank you!! Complétez les phrases suivantes avec une forme d’un de ces verbes: croire, voir, recevoir. 1. Jean et Julien __________ Jean et Julien- I&...

**French help part 1**

Hello!!!! I am so close to an A in French. I would be so grateful if someone could review this and tell me if I am correct. Thank you!!!!! Complétez chaque phrase avec la forme appropriée d’un de ces verbes. Dire, lire, écrire. 1. Elle n’aime pas...

**French 101 help Part 2**

Hi. I would really appreciate it is someone could review my answers for these questions.I am horrible with accents and always lose points. Are those correct as well? Thank you in advance!!! Complétez avec la forme correcte de savoir ou connaitre 6) __________ -vous qu&#...

**French 101 help**

Hi. Would someone please review and tell me if these are correct? Thank you!!!! Remplacez le nom dans les citations avec un pronom d'objet direct ou indirect selon des cas. 1) Est-ce que vous “me” regardez? Oui, nous . . . A:Oui, nous te regardons. 2) Les mauvais...

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