Thursday
March 5, 2015

Posts by Maria


Total # Posts: 1,594

science
Coefficient of friction is 13.0? Am I correct?
March 2, 2015

science
A body with a mass of 490kg is pulled along a horizontal plane at a constant velocity.the pulling force is 1.2 kN is making an angle of 20degrees with the plane. A.determine the coefficient of friction
March 2, 2015

science
1 . A body with a mass of 490kg is pulled along a horizontal plane at a constant velocity.the pulling force is 1.2 kN is making an angle of 20degrees with the plane. A.determine the coefficient of friction
March 2, 2015

Organic Chemistry
So, eclipsed with the methane on C2 and the rest of the chain (CH2CH3) on C3 in the same relative "position"?
February 25, 2015

Organic Chemistry
Looking down C2-C3 of 2-methylpentane, is the first newman projection staggered or eclipsed?
February 25, 2015

Math
It's an irregular hexagon. The base of the hexagon is 12m, the length of one side is 9m, the length of the other sides are 5m, and 4m, the width of the other sides are 7m and 5m. What is the area of the hexagon ?
February 23, 2015

math
it's an irregular hexagon. the base of the hexagon is 12m, the length of one side is 9m, the length of the other sides are 5m, and 4m, the width of the other sides are 7m and 5m
February 22, 2015

math
it's an irregular hexagon. the base of the hexagon is 12m, the length of one side is 9m, the length of the other sides are 5m, and 4m, the width of the other sides are 7m and 5m
February 22, 2015

math
what is the area of a hexagon with sides 5m, 4m, 5m, 9m, 7m and 12m
February 22, 2015

math
0.6 divided by (0.4 x 0.5)
February 22, 2015

math
In a bag are three red marbles and three green marbles. If two marbles are drawn from the bag at the same time, what is the probability that both marbles will be red?
February 22, 2015

math
explain comparing fractions 21/25?
February 19, 2015

physics
if a 400g ball moving 1.2 m/s [north], receives an impulse that changes its direction and speed to 2.8 m/s [east], what is the change of momentum?
February 13, 2015

physics
a regulation golf ball has a mass of 45.0 grams. a golf ball is dropped from a height of .305 m and it strikes the floor with a velocity of 2.35 m/s [down]. if the velocity of the ball as it leaves the floor is 2.15 m/s [up]. determine the impulse applied to the golf ball.
February 13, 2015

Physics
1
February 12, 2015

Physics
Two people are holding up the ends of a 4.40-kg wooden board that is l = 1.95 m long. A m = 2.00-kg box sits on the board, 0.50 m from one end, as shown below. What forces do the two people exert?
February 12, 2015

science
If we added more mass to the blocks of wood during these lessons,how would that have changed the experiment?
February 11, 2015

Algebra 2
simplify each expression. rationalize all denominators. assume that all variables are positive (1-sqrt(3x))/(sqrt(6x)) Please show work!!!!
February 9, 2015

Algebra 2
Steve can't teach well
February 9, 2015

Algebra 2
solve each equation. check for extraneous solution. sqrt(3x+4)-sqrt(2x-7)=3 please show work!!!!!
February 9, 2015

Algebra 2
solve each equation. check for extraneous solutions. sqrt(2x+1)+sqrt(2x+6)=5 please show work!!!!!
February 9, 2015

math
Gabe went to the amusement park with $40 to spend. His ticket cost $26.50. Write and solve an inequality to show how much he might spend on souvenirs and snack. Please tell me how you got this answer to this question.
February 8, 2015

math
a service of juice is 250 ml. how many servings are in a doze liters of juice?
February 4, 2015

math
Aaron has 5 pounds of flour. He needs 1/8 of a pound of flour to make a single cupcake. how many cupcakes can he make?
February 2, 2015

Math
Netta faxed n pages from the library. The library charges $1.50 per page. Later the same day, Netta faxed n more pages from a local copy shop. The copy shop charges $1.25 per page plus a $2 convenience fee. Write and simplify an expression for the amount Netta spent on faxes ...
January 22, 2015

Chemistry
qs, don't we need the concentration of what's left when we use the equation? Or are they the same thing with moles?
January 18, 2015

Chemistry
What will the pH be if 15 mL of 0.1 M HCl are added to the buffer obtained by mixing 70 mL of 0.5 M CH3NH2 and 30 mL of 1.0 M CH3NH3+Cl-? (Kb for CH3NH2 is: 5.2 x 10-4 ) I'm having a hard time figuring out what to do first. is the ICE table come in handy for this? Can you ...
January 18, 2015

science
What are some arguments against extending human life? Please describe at least one objection and one objection from your research and experience.
January 16, 2015

Math
Find the vertex: -1/4x^2+9/5x+2
January 7, 2015

Math
so b) will be g3 and c) will be d represents dollars per gallon and g represent gallons of gas? What else? Can you please check my answers, thank you very much.
January 6, 2015

Math
Mia buys 3 gallons of gas that costs d dollars per gallon. Bob buys g gallons of gas that costs $3 per gallon. a) Write an expression for the amount Mia pays for the gas. b) Write an expression for the amount Bob pays for the gas. c) What do the numeral and the variable ...
January 6, 2015

businesss
what does franchiser and franchisee mean and what are their defintions
January 5, 2015

Bussiness
could you give me the definitions for these two and could tell me the disadvantages and the advantages -franchiser -franchisee
January 5, 2015

math
-1
January 4, 2015

ELEMEMTARY MATH
12 = √4 x √3 2. and because 4 is a square number it can be squared to 2 √12 = 2√3 3. and because 3 can't be square rooted you just leave it so your answer will be √12 = 2√3
January 1, 2015

Applied Chemistry Project Help!!!
Research and describe one current application of the knowledge of the atom. This application can be in any field of your choice. This means the field can be scientific, such as medicine, or nonscientific, such as entertainment. The purpose of this assignment is to learn the ...
December 30, 2014

physical science
For questions #14 – 16, write an equation for the reaction of magnesium oxide with sodium chloride to produce magnesium chloride and sodium oxide. 14. Show the formulas of the reactants. 15. Show the formulas of the products. 16. Write the balanced the equation for this ...
December 20, 2014

Finance
Fjord Luxury Liners has preferred shares outstanding that pay an annual dividend equal to $7 per year. If the current price of Fjord preferred shares is $94, what is the after-tax cost of preferred stock for Fjord?
December 11, 2014

math
A company rents its care for a daily fee, plus an additional charge per miles driven. Trip one is 4 days, 450 miles, and cost $244.50 for the rental. Trip two is 3 days, 200 miles and cost 149.00 for the rental. Find the daily fee, and find the mileage charge. I don't know...
December 5, 2014

GEOMETRY
THE area of circle B is 25 times greater than the area of circle A. The radius of circle A is 3. What is the radius of circle B?
December 4, 2014

physics
A weightlifter has a basal metabolic rate of 64.6 W. As he is working out, his metabolic rate increases by about 650 W. (a) How many hours does it take him to work off a 450 Calorie bagel if he stays in bed all day? (b) How long does it take him if he's working out? (c) ...
November 24, 2014

College Physics
Thank you i tried doing it a million different ways but kept making a mistake somewhere i really appreciate it this truly helped me understand.
November 24, 2014

College Physics
A weightlifter has a basal metabolic rate of 64.6 W. As he is working out, his metabolic rate increases by about 650 W. (a) How many hours does it take him to work off a 450 Calorie bagel if he stays in bed all day? (b) How long does it take him if he's working out? (c) ...
November 24, 2014

College Physics
(a) How many hours does it take him to work off a 450 Calorie bagel if he stays in bed all day? (b) How long does it take him if he's working out? 2 h (c) Calculate the amount of mechanical work necessary to lift a 126 kg barbell 2.10 m. 3 J (d) He drops the barbell to the...
November 24, 2014

physics
an ice skater applies a horizontal force to a 20 kg block on frictionless, level ice causing the block to accelerate uniformly at 1.4 m/s^2 to the right. after the skater stops pushing the block it slides onto a region of ice that is covered with a thin layer of sand. the ...
November 21, 2014

math
9i / -3+8i
November 21, 2014

Physics
A sample contains 3.5×1019 radioactive atoms with a half life of 10000 years. How many atoms are expected to decay in the first second? After waiting 10000 years, how many atoms are expected to decay in the next second?
November 20, 2014

Science 7th Grade
Ms. Sue, I promise if you help me I will never ask for help on anything ever again. I just really need help. see im in connections academy but im moving to texas and texas has wierd laws so i have to go back to public school, and i really need to get my grades up i mean i have...
November 19, 2014

math
Find all zeros. Real and Imaginary f(x)= 5x^4 + 16x^2 + 3
November 17, 2014

math
find the inverse. f(x)=√3+4
November 15, 2014

math
Find the inverse f(x)= -2+7
November 14, 2014

math
(2+3i) / (4-2i)
November 14, 2014

math
Find the inverse of f(x) f(x)=3-1/2x
November 14, 2014

college algebra
2
November 14, 2014

college algebra
Find Functions with Given Zeros √2, -√2, 3
November 14, 2014

College Algebra
-6 - radical 10 / 3+8 radical 10
November 13, 2014

Math
The percentage of people not covered by health care insurance in 2003 was 15.6% (Statistical Abstract of the United States, 2006). A congressional committee has been charged with conducting a sample survey to obtain more current information. a. What sample size would you ...
November 10, 2014

calculus
The Voltage v , Current I and Resistance R are related by the equation V=IR. Suppose that V is increasing at a rate of 2 volt/sec, while I is decreasing of the rate of 1/5 (amp/sec ). Let t denote time in seconds. Find the rate at which R is changing when V=40volts and 1=2 amp .
November 8, 2014

calculus
The Voltage v , Current I and Resistance R are related by the equation V=IR. Suppose that V is increasing at a rate of 2 volt/sec, while I is decreasing of the rate of 1/5 (amp/sec ). Let t denote time in seconds. Find the rate at which R is changing when V=40volts and 1=2 amp .
November 7, 2014

Global terrorism
What effect has the 1991 gulf war had on current day terrorism ?
November 5, 2014

Chemistry
The ionic compund sometimes called yellow uranium is used to produce colored glazes for ceramics. It is 7.252% sodium, 75.084% uranium, and 17.664% oxygen a. What is the empirical formula for this compound? b. This compound has a molecular mass of 1268.06 g/mol, what is the ...
November 3, 2014

chemistry
The ionic compund sometimes called yellow uranium is used to produce colored glazes for ceramics. It is 7.252% sodium, 75.084% uranium, 17.664% oxygen? a. What is the empirical formula for this compound? b. This compound has a molecular mass of 1268.06 g/mol, what is the ...
November 3, 2014

english help repost
The Trouble with Television by Robert Mac Neil It is difficult to escape the influence of television. If you fit the statistical averages, by the age of 20 you will have been exposed to at least 20,000 hours of television. You can add 10,000 hours for each decade you have ...
November 3, 2014

accounting 1
Ethic Case The Controller for Anderson Electric, Ron Foss, is reviewing the year-end adjusting entries prepared by the accounting staff for approval before they are posted to the general ledger. Angela Bennett, the company president, has suggested the December accrual for wage...
October 30, 2014

Math HELP!
98
October 28, 2014

english .... thinking question... please help!!
How do values and belief shape who characters are as individuals and influence their behavior? Our values and belief are strongly related and influence our behavior. It can bring to mind by certain communications or experiences. Our values therefore not only change at ...
October 28, 2014

English ... thinking question!!
How does viewing human behavior as good or evil shape a(n) individual’s/ society’s view of the world? Can you give me some thoughts about this question ? I have no idea!!! please help! Thank you so much
October 28, 2014

geometry
Quadrilateral Math has been dissected into squares. The area of the red square is 64 square units and the area of the blue square is 81 square units. Determine the dimensions and the area of Quadrilateral Math?
October 25, 2014

Chemistry
Calculate the value (calories) for the heat of solution. Mass of NaOH: 2.03 g ΔT for reaction A : 8 °C
October 24, 2014

accounting
I=prt I=9800*.02*15=$2,940
October 23, 2014

physics
An object slides on a level surface in the +x direction. It slows and comes to a stop with a constant acceleration of -2.45 m/s2. What is the coefficient of kinetic friction between the object and the floor? (please include explanation)
October 20, 2014

Geometry
The length of a table is 6 feet on a scale drawing the, length is 2 inches write three possible scales for drawing
October 19, 2014

Geometry
a game room has a floor that is 120 feet by 75 feet a scale drawing of the floor grid paper uses a scale of 1 unit:5 feet what are the dimensions o the scale drawing
October 19, 2014

geometry
a game room has a floor that is 120 feet by 75 feet a scale drawing of the floor grid paper uses a scale of 1 unit:5 feet what are the dimensions o the scale drawing ***Show steps please I need this by tomorrow***
October 19, 2014

Science
0.003mm
October 13, 2014

Science
Thank you
October 13, 2014

Science
a reasonable estimate for the size of a cell's nucleus is a. 0.003 b. 3 mm c. 0.003m d. 3m
October 13, 2014

calculus
ya i just didn't get the second part because its volume not the surface area and i got a big number I'm not sure about it
October 12, 2014

Sociel Studies
Hello, Thank you, so I was on the right track?
October 12, 2014

Sociel Studies
Hello, I keep coming the answer of sovereign immunity but I am unsure. I am trying to write a paper and here is the question: Why a government leader, politician, or special interest group invoke sovereignty?
October 12, 2014

Calculus
Use differentials to determine by approximately what percentage does the perimeter of a square table increase if its diagonal is increased from 30 centimetres to 31.245 centimetres
October 11, 2014

Physics
The potential difference between the plates of a capacitor is 335 V. Midway between the plates, a proton and an electron are released. The electron is released from rest. The proton is projected perpendicularly toward the negative plate with an initial speed. The proton ...
October 10, 2014

Chemistry
What is the wavelength of a photon having a frequency of 71.6 THz? So I know 1 THz = 10 to the power of 15 Hz And c= 3 x 10 to the 8th and h= 6.63 x 10 to the -34th
October 10, 2014

Math
On an airplane,there are two seats on the left side in each row and three seats on the right side. There are 90 seats on the right side of the plane. a. How many seats are on the left side of the plane? b. How many seats are there altogether?
October 9, 2014

Math
5/8 of the 64 musicians in a music contest are guitarists. Some of the guitarists play jazz solos, and the rest play classical solos. The ratio of the number of guitarists playing jazz solos to the total number of guitarists in the contest is 1:4. How many guitarists play ...
October 8, 2014

Electron transition
The electron in a hydrogen atom in level n= 8 undergoes a transition to a lower leve by emitting a photon of wavelength 956 mom. What is the final level of the electron? A) 4 B) 8 C) 9 D) 1 E) 3
October 8, 2014

Fraction
3/4 x 12= 9 eggs
October 2, 2014

Math
the temperature dropped 18 degrees F between 6 am and 6 pm. during the night the temperature fell another 8 degree F. at 6 am the temperature started rising. It rose 1degree F the first hour, 2 degree F the second hour, and 4 degree the third hour. The temperature rose another...
September 29, 2014

Math
the temperature dropped 18 degrees F between 6 am and 6 pm. during the night the temperature fell another 8 degree F. at 6 am the temperature started rising. It rose 1degree F the first hour, 2 degree F the second hour, and 4 degree the third hour. The temperature rose another...
September 29, 2014

ps 84
rewite you can bake a potato with the rays of the sun on a very hot day as an imperative sentence
September 25, 2014

Maths
a litre of orange fruit drink contains 22%orange juice.how many millilitres of orange juice must be added to produce a mixture containing 50% orange juice?
September 25, 2014

Physics
A quarterback is trying to throw a football to a stationary receiver. The receiver is not directly in front of him, so the total velocity of the ball and the velocity of the quarterback has to be 20 m/s at an angle of 21.4 degrees from the vertical direction as shown in the ...
September 24, 2014

Chem
Ohhhh Ok thank you sooo much :) makes more sense Thank you again
September 22, 2014

Chem
I am a little confused ... the previous questions were What is the concentration in W/V units? (23g/250ml)x100 = 9.2% w/v How many moles of NaCi were dissolved? (23g/1) x (1mol/58.54g)+ .39moles Then it was How many atoms were dissolved? and this is zero because there are no ...
September 22, 2014

Chem
I have a concentration of saltwater (NaCI) in that there was 23 g of salt dissolved in .025 L of water. How many atoms were dissolved? Is this how you set it up??? .39 x(6.022x10^23)
September 22, 2014

chemistry
Thank you :)
September 17, 2014

chemistry
I have 3 grams of CaCI2 and dissolve this into 0.5 L water. What is the concentration in g/dl (grams/deciliter)? I take 10 milliliters of this solution and add it to 990 milliliters of watet fo a total of 1000 milliliters. What is the concentration of this new dilution in ...
September 17, 2014

Math
helen purchased three books and received a 20% discount. She will pay $10 for shipping. Write an expression that can be used to represent the total amount paid for the three books and the shipping cost.
September 10, 2014

chemistry
calculate the molality, molarity, and mole fraction of NH3 in an 12.80 mass % aqueous solution (d=0.9651 g/ml)
September 8, 2014

geometry
what is the perimeter of a 12 * 15 pool with a 3ft non slip surface around it
September 4, 2014

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