Friday
August 1, 2014

Posts by fred


Total # Posts: 311

PhysicsI
A puddle holds 150 g of water. If 0.50 g of water evaporates from the surface, what is the approximate temperature change of the remaining water? (Lv = 540 cal/g)

PhysicsI
A windowpane is half a centimeter thick and has an area of 1.0 m2. The temperature difference between the inside and outside surfaces of the pane is 15° C. What is the rate of heat flow through this window? (Thermal conductivity for glass is 0.84 J/s×m×°C.)

math
If 1/8" = 30' how many fractions of an inch is 24'

jacksonville
2NBr3+63NaOH--->N2+3NaBr+3hobr

PHYSICS(HELP)
I obtained: a) 0.86 atm b) 5503.4 Pa c) 7% But all are wrong and I don't know why!!! And I have only one submission more. Please help!!!

Physics Classical Mechanics Help ASAP
Thanks a lot!!!

Physics Classical Mechanics Help ASAP
Greco, thanks a lot!! I obtained this results for the problem above. a) 0.26 b) 54715.5 c) I am not sure

Physics Classical Mechanics Help ASAP
If you have a) you only need to rest from b) ..... but I am continue suffering with a) did you replace all the values without converting to other unid system???

Physics Classical Mechanics Help ASAP
Thanks a lot abc, and what about a) and b) I did it again and now I obtained a)0.83 atm b)3061.5 Pa But it's my last chance and I am not sure......

Physics Classical Mechanics Help ASAP
I obtained: a) 0.86 atm b) 5503.4 Pa c) 7% But all are wrong and I don't know why!!! And I have only one submission more. Please help!!!

Physics Classical Mechanics Help ASAP
Please help with this exercise, is the only one that I need......please.

calculus hw
so it should be 5/12+8/3=37/12?

calculus hw
so it should be 5/12+8/3=37/12?

calculus hw
What is the area bounded by y=x^2 and y=x^3-2x?

science
What can be inferred after performing the experiments in the Atomic Theory lab?

Chemistry
What molecular formula can you deduce from a mass spectrometry of 156 m/z. And how do you get that formula? Steps on how to get the formula is much appreciated! Thanks!

Mathjc
b(A+a)

Statistics
Which is true about a 99% confidence interval for a population proportion based on a given sample? I. We are 99% confident that the population proportion is in our interval. II. There is a 99% chance that our interval contains the sample proportion. III. The interval is wider ...

Math
Thanks so much #yolo

Math
How did you do it? :)

Math
How do I convert this decimal into a fraction? 3.083 (The last 3 is repeating by itself)

Chemistry
Thanks, but for the first one, I thought it'd be no reaction since they are both metals. Is it possible for Ca and Al to react with each other?

Chemistry
What kind of reaction is this (redox, precipitation, acid-base, or complex ion formation reaction)? 1. 3 Ca(s) + 2 Al^3+(aq) -> 3 Ca^2+(aq) + 2 Al(s) 2. LiHCO3(s) + heat -> Li2CO3(s) + CO2(g) + H2O(g) Complete the reaction: Ni(s) + 2 Na^+(aq) -> ?

quantum physics
all are struck with 8d you need 3a?

Chemistry
Need help with coming up with a extraction flow scheme for separating the compounds in this mixture: aniline, p-anisic acid, octanol, and NaCl Thanks!

MATH 117
What is the greatest common factor (HINT: It may help for you to show an example of how to find a greatest common factor)? How do you know when you have found the greatest one?

physics
An automatic dryer spins wet clothes at an angular speed of 4.4 rad/s. Starting from rest, the dryer reaches its operating speed with an average angular acceleration of 4.2 rad/s2. How long does it take the dryer to come up to speed?

math
the trip took 2 hours longer to cover the 160 miles than it took to come back. if the total time of the round trip was 6 hours, what was the rate going and what was the rate coming back?

Finance
A firm with 50% debt to equity ratio has a cost of equity capital of 15%, a cost of debt of 9% and a tax rate of 33%. The firm is considering a project costing 5,000 that will generate an annual cash flow of 1,000 for the next 8 years. What is the projects NPV?

Chemistry
what is the molarity of 28.9 g of cacl2 dissolved in water to make 0.78 l of solution

phy
A popular brand of pressure washer claims to deliver 330 litres per hour of water at a pressure of 80 bar, drawing 1400 W of electrical power in the process. Pressure washers of this type consist of an electric motor that drives a small compressor to pressurize water fed into ...

Physics
A van drive 17.5km north. Then it turns west and drives 9.1km. The van then drives 14.5km south. The entire trip takes 40 minutes. What is the average velocity of the truck? I know avg velocity is displacement/time elasped, but I can not figure out what the displacement it.......

MATHS
$169.50

MATHS
PAT FAMILY HAS 7 MEMBERS. EACH MEMBER SPENDS $10.00 TO ENTER A CINEMA.THEY MET 3 FRIENDS AND BOUGHT LUNCH FOR EVERYONE AT 9.95 EACH.CALCULATE THEIR TOTAL BILL.

MATHS
thanks anyway

MATHS
ms.sue can you practice me in maths for s.e.a like give me sites to do test then you will correct when i post the answers

Reading
Is these answers correct? devoid intimidate jeopardize sneer implore introvert sibling vivacious infuriate smug 1-2. The people I love best can __ me the most. No one can make me as angry as my parents and __s can. 3-4. Please don't __ me to help you with your term paper. ...

math
A telephone pole is 55 feet tall. Jeri stands in the shadow of the pole. She is 66 inches tall, gut her shadow is 12 feet long. How far away from the telephone pole is she standing?

math
Malcom designed the roof plan of a house and implement shed. The dimensions of the house's roof are 25 ft wide by 40 long. The length of the shed's roof is 140 feet. If the two shapes are similar, what is the width of the shed's roof?

Reading
thanks

Reading
Is these answers correct? condone, pathetic, feign, precedent, comtemplate gape furtive feasible, fiscal, punitive 1-2. "Would it be__ for us to buy a new copy machine?" Hal asked at the office budget meeting. The boss replied, "Unfortunately, our __situation is...

Reading
thank you

Reading
Is these answers correct? devoid infuriate jeopardize smug implore intimidate sibling sneer introvert vivacious 1-2. The people I love best can __me the most. No one can make me as angry as my parents and__s can. I guess close relationships are conducive to strong feelings, bo...

Physics
A proton and an electron enter perpendicular to the direction of the magnetic field. The speed of the proton is twice the speed of the electron. What is the ratio of the force experienced by the proton to the electron?

Physics
A proton and an electron enter perpendicular to the direction of the magnetic field. The speed of the proton is twice the speed of the electron. What is the ratio of the force experienced by the proton to the electron? Thanks for helping me out

Physics
A circular loop with 30 turns and area of 0.25 m2 rotates at 100 rad/s. The axis of rotation of the loop is perpendicular to the direction of the magnetic field of 0.04 Tesla. What is the maximum emf induced in the loop?

Physics
A proton experiences a force of 4 Newton when it enters perpendicular to the direction of the magnetic field with a speed 100 m/s. What is the force experienced by the proton if it enters parallel to the direction of the magnetic field with a speed of 200 m/s?

Physics
A conductor of length 2m carrying a 1.5A current experiences a force of 2.2 N. What is the magnitude of the magnetic field that acts perpendicular to the flow of current in the conductor?

algebra
approximately how far can bobby drivein 2,3,4,and 5 hours

chemistry
At elevated temperatures, sodium chlorate decomposes to produce sodium chloride and oxygen gas. A 0.8915-g sample of impure sodium chlorate was heated until the production of oxygen gas ceased. The oxygen gas collected over water occupied 57.2 mL at a temperature of 22°C a...

Statistics
The number of arrivals per period is distributed according to the poisson with the expected value of 0.75 unit per period. the cost of waiting per unit per period is $3.20. The facility cost for serving one unit per period is $5.15. What expected service rate should be establi...

Chemistry
A solution is 0.10M Pb(NO3)2 and 0.10M AgNO3. If solid NaCl is added to the solution what is [Ag+] when PbCl2 begins to precipitate? (Ksp PbCl2 = 1.7 x 10^-5; AgCl = 1.8 x 10^-10) The answers is 1.4 x 10^-8 How do I find the answer

Chemistry
Molarity of NaOH solution = 0.06115 Volume of NaOH used = 15.50 mL Volume of unknown Sample = 10.00 mL Find the Moles of NaOH used? Find the molarity of H3PO4? Thanks!

lit
in "A Pair of Silk Stockings" the silk stockings are a symbol of what?

Math
find the total number of square units the patio will cover if the width is 4,5,6,or 7 units

Math
find the total number of square units the patio will cover if the width is 4,5,6,or 7 units

Chemistry
For solution 1, 4.00mL of 0.0200 M Cr(NO)3 was added to 20.00ml of 0.0200 M Na2H2EDTA, then the a time and absorbance were taken every 5 mins. If at 5:00 min the absorbance was 0.039 how do I find [Cr3+]0, [CrEDTA-]t, and [Cr3+]t. The absorbance at 0:00 mins was 0.039 if it is...

biology
One in every 685 children born in the chicoutimi area of quebec province has tyrosinemia. It is cause by having two copies of the receissive allele. Under the assumptions of Hardy-Weinberg equilibrium, calculate the value of q required to produce this proportion of afflicted n...

lang arts
i dontknow help

math
Mr burr the head custodian is working on putting new numbers on 42 of the 81 classroom doors. He found two numbers for the 23rd door he was working on in the 6th grade hallway whose sum is 35 and their product is 306. What are the two numbers?

Math
Find the volume generated when the area bounded by the curve y^2 = 16x, from x = 0 to x = 4 is rotated around the x-axis.

Math
ok thanks alot

Calculus
Find the area bounded by y= -0.5x+6, y= !/4 x and the y-axis. Sketch a graph of the two functions and shade in the area.

help
i thought you were a helping site please help i read my lessons but i just coulnd answer some questions. help please i need to pass this test, i would really appreciate it your time. im new to this site

Neoclassicism I english 11
1. Which word does NOT describe Neoclassical literature of the 17th century? balanced religious elegant concise 2. In lines 17-20 of Annus Mirabilis, who is Carthage? Thus mighty in her ships, stood Carthage long, And swept the riches of the world from far; Yet stoop'd to ...

english 11 hardtimes novel
22. What connection can be drawn between Dickens's father and Tom? Both worked in a bank. Both favored straight facts. Both were irresponsible with money. Both had a gambling problem. 23. How do innovations in farming methods contribute to population growth? They results i...

Earth Science
How old is the Gneiss in Greenland?

Moanalua Middle School
One box contains six color cards: two blue, three yellow, and one orange. Another box contains four number cards, numbered 1, 2, 3, and 4. One card is picked at random from each box with replacement. find the probability of blue, then 1.

human resources
The R&D organization has decided it wants to promote total involvement and create a learning organization. The community-building meeting is the mechanism to move this forward. You have decided to bring in other consultants from the Working Better Group to help you plan this m...

College Algebra/Geometry
What size should the frame be?

College Algebra/Geometry
What size should be the frame be? Suppose an artist has a circular picture with a diameter 6 inches which she wishes to frame by a uniform width frame with covers 1/2 inch width uniformity of the painting and has total area equal to that of the exposed painted surface when the...

Math
Roger wants to carpet a rectangular room with the length of 8 ¾ feet and a width of 9 1/3 feet. If he has 85 square feet of carpet, how many square feet of carpet will be left after he covers the floor of the room?

english story
1 bicycles 2. b

Math
If f(x)= x^2 + 2x What is f(-x) What is f(1/a) Thanks!

statistics
a) b)1 c)standard deviation=

math
pete colored 1/2 of a poster. rebecca colored 1/3 of a poster. what fraction still needs to be colored?

math
George is making a circle graph of the basketball shots he made during the season. He made 16 foul shots, 29 two-point shots, and 5 three-point shots. What will be the measure of the angle he makes when creating the sector for foul shots?

Algebra
The profit made from the sale of tiles is found by subtracting the costs from the revenue. (This is the money you take in minus the money you spent.) g. Find the Profit Equation by substituting your equations for R and C in the equation . Simplify the equation. Suppose the rev...

Algebra
Suppose your tile company spends $ 195 each month, regardless of how many tiles are purchased as supplies. How much do you spend if you purchase 1000 tiles this month, taking into account this fixed cost? c. What is a possible reason for this fixed cost? d. Find the cost equat...

math
1. Suppose you are the owner of a tile company who purchases tiles from a supplier at a rate of $5 each. a. The variable cost is the cost that depends on the quantity, such as how many tiles are purchased. If you buy 100 tiles at $5 each, how much have you spent on tile? What ...

Ground School: airport operations
What is the best way for me to learn more about airport operations??

Ground School
I am taking a ground school class for my private pilot license and am having trouble with weather, what is the best way to go about learning this stuff????

math
Alex takes 3 hours longer to complete a certain job than Barry does. If they can complete the job by working together in 3.6 hours, how long would it take Alex to complete the job working alone? 3.

Chemistry
Hi I need help with a problem The accuracy of what measurement must be increased in order to increase the accuracy for the specific heat? Thank You!

business math
William Bennett earns $12,800 per year. He is paid 12 times per year and claims 1 exemption. His state taxes him at a 3% rate. How much tax is withheld per pay period?

spanish
so are you coming to my house tomorrow? Translate into spanish plzzz

Algebra 2
Simplify a(-2)power divided by b(6)power times c(-8)power so there are no negative exponents

math pre cal
What is the future, rounded to whole dollars, of $25,000 after 7 1/2 years, if money earns at an annual rate of 5.75% compounded continuosly?

Chemistry
What energy is associated with a photon in the infared region of the spectrum having a frequency of 4.5*10^12s^-1

us history
what is another word for nativism

Language arts/writing
An acrostic poem for the bill of rights?

algebra
which of the following expressions can be used to increase 8500 by 2.5%. a. 8500x1.025 b.8500x0.125 c.8500x0.025

Math
VF is a small accounting firm supporting wealthy individuals in their preparation of annual income tax statement. Every December, VF sends out a short survey to their customers, asking for the information required for preparing the tax statements. Based on 24 years of experien...

algebra
In your mathematics course, your final grade was twelve points from a B. Your total points for the course were 252. How many points were possible for the course? (Assume 80% of the course total was a B.)

trig
i can not figure out how to write the complex number in rectangular form the question is 4(cos 5Pie/6 + i sin 5 pie/6)

math
h4veyj 5rvjhvv4

english
I need to use at least five different pronouns in my sentences. Can you help? (I) recently asked (my) sister about (her) use of credit cards. (She) told (me) that (she) uses it to make everday purchases. (I) asked (her) if (she) was making any type of payment on them. (My) sis...

Physics
Hi, Which correctly expresses the relationship between wavelength (L), speed (V) and perios (T) of a sinusodial wavform ? a) L = T/V b) L= 2fxV/ T c) L= 1 / V x T D) L= V/T e) L = V x T f) L= V x T/ 2f I feel it is option (d) ..please check for me .. and thanx

Statistics Math Help
A distribution of 800 test scores in a biology course was approximately normally distributed with a mean of 35 and a standard deviation of 6. Calculate the proportion of scores falling between 20 and 40

Statistics
A distribution of 800 test scores in a biology course was approximately normally distributed with a mean of 35 and a standard deviation of 6. Calculate the proportion of scores falling between 20 and 40

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