Sunday
October 23, 2016

# Posts by joey

Total # Posts: 520

Physical
A motor car travelling at 14m/s on dry flat surface should be able to stop in 14m.Assuming the deceleration to be uniform. Given: its value and the corresponding bracking time is -7m/s^2 , 2 sec Calculate the distance travelled during the first second after the application of ...
October 22, 2016

Chemistry
24.5 g of H2SO4 (98 g/mol) is added with h20 to make up to 800 ml of a solution. If 50 ml of the H2SO4 is added with 100 ml of H20, what will be the molarity of the diluted solution? MaVa=MbVb (0.3125)(50)=(Mb)(100) Mb= 0.16 M No huh?
October 9, 2016

math
5x3=? A 8-- B 2 C 15 D 4
October 6, 2016

Math
Write an equation of the line that passes through (-5,-1) and is parallel to the line y=4x-6
September 1, 2016

Finance / Econ
Sorry, another part I forgot to write (mixed it up with a similar question right by this question): The real MARR (MARR_R) is given to be 6%. What I wrote for the answer choices and my attempt at a solution still apply though.
August 27, 2016

Finance / Econ
***Correction for the "Determine the inflation rate per half year": The question asked for the actual/current MARR per half-year, not the inflation rate.
August 27, 2016

Finance / Econ
A business invests \$8,000 into an account that has 5% interest per-year. Annual inflation is 3.5 % over the next 5 years. Determine the inflation rate per half year? I tried doing this: MARR_R = (1+MARR_C)/(1+f) - 1 --> 6% = (1+MARR_C)/(1+3.5%) - 1 --> MARR_C = 9.71 %/yr...
August 27, 2016

Chemistry
How many molecules are in 5.2L of carbon dioxide gas?
July 13, 2016

math
1. If AC=60 what is AB ? 2.If AB=9x=17 and BC=4x+27 find the following x=_____ an AC=______ ? 3.If m ∠ABD=20 find the following measurements M∠CBE=____ M∠DBC=_____ M∠ABE=_____ M∠DBE=_______
June 27, 2016

mathemarics
Given the point m(-3,-4) is the midpoint of XY and that X(7,4)answer the following ; A Find the coordinates of Y . B Find the distance between X and Y ?
June 27, 2016

geometry
1.)find the distance between A(-1,1) and b(7,-2) 2.) find the mid poiny of AB
June 27, 2016

geometry
find the distance between A(-1,1) and b(7,-2)
June 27, 2016

geometry
Find the value of x. x = 18x = 22.5x = 30x = 54 is like a like two line almost forming an X and on the left side it says (x+90) and on the right side it says 4x
June 24, 2016

geometry
find the value of each variable. A. x=38, y=76 B. x=52, y=76 C. x=38, y=104 D. x=52, y=104
June 24, 2016

geometry
FIND A POINT E ON CD SUCH AS THE RATIO OF CE TO CD IS 1/4.' ANSWER CHOICE A. -7 B. - 5 C. -3 D. -1
June 21, 2016

Math-Calc
Water is leaking out of an inverted conical tank at a rate of 14000.0 cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height 8 meters and the diameter at the top is 6.5 meters. If the water level is rising at...
May 24, 2016

Calculus
A bucket begins weighing 15 pounds, including the sand it holds. The bucket is to be lifted to the top of a 50 foot tall building by a rope of negligible weight. However, the bucket has a hole in it, and leaks 0.1 pounds of sand each foot it is lifted. Find the work done ...
April 29, 2016

Pre Calculus
A cylinder shaped can needs to be constructed to hold 200 cubic centimeters of soup. The material for the sides of the can costs 0.02 cents per square centimeter. The material for the top and bottom of the can need to be thicker, and costs 0.06 cents per square centimeter. ...
April 29, 2016

Pre Calculus
A piece of cardboard measuring 13 inches by 11 inches is formed into an open-top box by cutting squares with side length x from each corner and folding up the sides. a. Find a formula for the volume of the box in terms of x b. Find the value for x that will maximize the volume...
April 29, 2016

Calculus
A piece of cardboard measuring 13 inches by 11 inches is formed into an open-top box by cutting squares with side length x from each corner and folding up the sides. a. Find a formula for the volume of the box in terms of x b. Find the value for x that will maximize the ...
April 28, 2016

Math
I need help please. 11 1/9% of what number is 900?
April 18, 2016

Language
correct what u just read the question and said correct.
April 5, 2016

Algebra
A ladder is placed against the side of the house. The top of the ladder is 12 ft above the ground. The base wof the ladder is 5feet away from the house. Find the length of the ladde.
April 4, 2016

Physic
ON is the vertical plumb line.A horizontal force F applies at M to push the piston at O and N,with the help of rods MO,MN.The rods MO,MN have the same length,when the distance of ON is 200cm,the distance of M to the plumb line ON is 10cm.Assuming the weight of the piston and ...
March 28, 2016

Chemistry Dimensional analysis
A cyclist rides at an average speed of 18 miles per hour. if she wants to bike 212km, how long in hours must she ride? What I have so far.. 212km(10^3 miles
February 7, 2016

Science
jerk you didt even answer stupid u just said the question was rght lol
January 25, 2016

Math
20/100x40=8
January 17, 2016

language arts
Analyze how Mrs Watson tries to pit a positive spin on life in the south?
January 6, 2016

Chemistry
A 0.200 g sample of carbon dioxide, CO2, has a volume of 525 mL and a pressure of 473 mmHg . What is the temperature of the gas in kelvins?
November 27, 2015

Math
The quotient of two proper fractions is less than 1
November 19, 2015

Calculus
The volume V of a growing spherical cell is V =4/3πr^3, where the radius is measured in micrometers (1 µm = 10^−6m). Find the average rate of change of V with respect to r when r changes from 3 to each of the following. i)3 to 6µm ii)3 to 4µm
October 31, 2015

physics
A novice golfer on the green takes three strokes to sink the ball. The successive dis- placements are 7 . 7 m to the north, 1 . 9 m 45 ◦ north of east, and 8 . 7 m 76 ◦ west of south. Starting at the same initial point, an expert (lucky) golfer could make the hole ...
October 29, 2015

physics
Two identical charges, each -8.00 x 10-5 C, are separated by a distance of 25.0 cm. Find the electric force between them?
October 26, 2015

Calculus
Differentiate. g(x) = 5e^x√x
October 4, 2015

Vince
1/wavelength = 1.9678 X 10^7 m^-1 (1/1-1/n^2) 1/9.68 X 10^-8 = 1.09678 X 10^7 m^-1(1-1/n^2) Is this right , how to solve the rest ?
September 17, 2015

Vince
1/wavelength = 1.9678 X 10^7 m^-1 (1/1-1/n^2) 1/9.68 X 10^-8 = 1.09678 X 10^7 m^-1(1-1/n^2) Is this right , how to solve the rest ?
September 17, 2015

Vince
Please show work for Determine the final end (final) value of n in a hydrogen atom transition, if electron starts in n = 1 and the atom absorbs a photon of light with an energy of 2.044 X 10^-18J? thank you very much for your help
September 17, 2015

math
and steve i believe 54 is right
July 20, 2015

math
18 is not correct
July 20, 2015

math
42 is incorrect 294 is the correct answer sorry mat good try tho
July 20, 2015

Chemistry
Noble gases are the least reactive because they have a perfect 8 valence electrons. Or is it because they do not have any unpaired electrons like the rest of the elements.
July 3, 2015

Chemistry
If I were to explain to someone about how to find a charge of an element, would anyone agree with this: The charge of an element is determined by the gain or lose of electrons. Depending on how close they are to the left/right side of the periodic table concludes their charge...
July 2, 2015

Chemistry Subatomic particles
Two actually, for the "Data Supporting Discovery,"when it says data, does it mean I have to include a brief explanation about the experiment from the previous group? And for the calculations, is that the "official" way to calculate them, or is there another...
June 29, 2015

Chemistry Subatomic particles
Fill in the chart (Numbers correspond to each other[I.E 1 in 1st group connects with 1in 2nd]) Subatomic particle found 1.Proton 2.Neutron 3.Electron Scientist 1.Rutherford 2.Chadwick 3.Thomson Experiment 1.Gold Foil Experiment? 2.? 3.Cathode Ray Tube Data Supporting Discovery...
June 29, 2015

Chemistry
How come lead is denser than copper though more copper atoms can fit into a same size cube than lead atoms can?
June 29, 2015

chimistry
The molar heat of fusion of lead (Pb) is 1.140 kcal/mol. How much heat must be added to 97.0 g of solid lead at its melting point in order for it to completely melt? A 1.44 kJ B 10.18 kJ C 12.48 kJ D 25.04 kJ
June 24, 2015

math
v(t) = (5x-75)^2 + 4375 so the lowest value possible for v(t) is 4375 at x=15.
May 22, 2015

Chemistry
What is the pH, pOH, [H+] and [OH-] for a solution that contains 5.25 x 10^-3 moles of HCl dissolved in 3.25 L of water? I was gone the day my teacher explained this and I'm completely lost on what to do. An outline of steps needed to solve the problem would be helpful. ...
May 8, 2015

math
The volume inside a rectangular storage room is 2,025 cubic feet. The room is 9 feet high. Find the area of the floor.
April 28, 2015

math
The area of the base of a rectangular juice box is 4 1/2 square inches. If the volume of the box is 18 cubic inches, how tall is the box?
April 27, 2015

Physics
An object with a net charge of 20 µC is placed in a uniform electric field of 627 N/C, directed vertically. What is the mass of the object if it floats in the electric field?
April 20, 2015

Calculus
The management of the UNICO department store has decided to enclose an 870 ft2 area outside the building for displaying potted plants and flowers. One side will be formed by the external wall of the store, two sides will be constructed of pine boards, and the fourth side will ...
April 13, 2015

Physics
A 4.12 kg mass undergoes an acceleration along both the x and y directions. Ax = -2.60 m/s2 and Ay = 3.50 m/s2. Find the magnitude of the resultant force. Answer in units of N.
March 2, 2015

Newcastle auto plc has a current cash flow of 4.4 million and pays no dividends. The Present value of the company ´s future cash flows is 74 million. The company is entirely financed with equity and has 800.000 shares outstanding. Assume the dividend tax is zero. ...
February 9, 2015

Corporate Finance
Newcastle auto plc has a current cash flow of 4.4 million and pays no dividends. The Present value of the company ´s future cash flows is 74 million. The company is entirely financed with equity and has 800.000 shares outstanding. Assume the dividend tax is zero. ...
February 9, 2015

math
jeff has a big scoop of ice cream that is 10 inches tall it melts by 25% in a minute whats the height of the ice cream after one minute
February 8, 2015

math
jeff has a big scoop of ice cream that is 10 inches tall. it melts by 25%in a minute.whats the height of the ice cream after one minute
February 8, 2015

Math 120
Write 4logb(X)-1/3logb(y)+2logb(z)as a single logarithm Its log base b.
December 3, 2014

Chem
The acidic H is almost always attached to an Oxygen Why is that?
December 1, 2014

Physics
November 14, 2014

Physics
The graph shows the temperature versus time relationship for 2kg of particular substance. The substance is in the solid state at a temperature of 20 degrees Celsius b) If 200 joules of heat is added during the time interval B(20 degrees Celsius) to C(80 degrees Celsius), what ...
November 14, 2014

Physics
The graph shows the temperature versus time relationship for 2 kg of particular substance. The substance is in the solid state at a room temperature of 20 degrees Celsius. - The 100 joules of heat is needed to completely change the substance from a solid to a liquid state, ...
November 14, 2014

Chemistry 400/ Chem 1A
Assuming that the resolution of an electron microscope is equal to the deBroglie wavelength of the electrons used, what is the resolution of an electron microscope (in nm) when the electrons are accelerated to a speed of (5.60x10^5) m/s?
October 29, 2014

Principles of Accounting
Exercise 5-3 Analyzing and recording merchandise transactions-both buyer and seller LO P1, P2 Santa Fe Company purchased merchandise for resale from Mesa Company with an invoice price of \$26,300 and credit terms of 2/10, n/60. The merchandise had cost Mesa \$17,937. Santa Fe ...
October 22, 2014

NH4NO3 explosive?
Ammonia is used in its anhydrous form gas and the nitric acid is concentrated. This reaction is violent owing to its high exothermic nature.
October 6, 2014

NH4NO3 explosive?
Yes it is. it is used at mining
October 6, 2014

Calculus
A light is hung 15 ft above a straight horizontal path. If a man 6 ft tall is walking away from the light at the rate of 5 ft/sec, how fast is his shadow lengthening and at what rate is the tip of the man’s shadow moving?
October 6, 2014

Chem 400
Direct reaction of solid iodine (I2) and gaseous chlorine (Cl2) produces an iodine chloride,(IxCly), a bright yellow solid. 0.678 g of iodine (I2) is mixed with 0.851 g of chlorine (Cl2). After the elements react, some chlorine is left over along with a single compound that ...
October 1, 2014

Chemistry
M1V1=M2V2 so 0.1 M x 1.5 L= 2.52 x ?L ?L of 2.52 M stock solution= 0.05 L To find out how much water you need to add just subtract 1.5 L of original solution from 0.05 L. so 1.5 L - .05 L = amount of water in L then just convert you answers to mL.
October 1, 2014

Chem 400
What about microliter conversion to ml?
October 1, 2014

Chem 400
A 55 uL of hexane is injected in a mass spectrometer. how many protons are in the 55 uL injection? (density Hexane= 0.6548 g/mL)
October 1, 2014

Chemistry
Yeh its 14.9 lb/in^2
September 24, 2014

Chemistry
Assume that the width of your body (across your shoulders) is 50.8 cm inches and the depth of your body (chest to back) is 25.0 cm. If the atmospheric pressure is 14.9lb/in^2, what mass of air (lb) does your body support when you are in an upright position?
September 24, 2014

Science! Help
thx guyz
September 23, 2014

Chemistry 400/ Chem 1A
I got 4.854 g of H2SO4. Thank you so much. I did it right the first time just has trouble understanding the problem in my head. To find grams of excess reactant I just have to convert moles of ethanol to g right?
September 15, 2014

Chemistry 400/ Chem 1A
A chemist mixes 5.216 g of potassium permanganate, 2.318 g of ethanol, and excess sulfuric acid. These chemicals react as follows: 4 KMnO4 + 5 C2H5OH + 6 H2SO4 ---> 4 MnSO4 + 5 CH3COOH + 2 K2SO4 + 11 H20 What mass of sulfuric acid is consumed in this reaction, assuming that...
September 15, 2014

physics, math
Part A & B are 0.10m apart. A point charge of +3.0*10^-9C is placed at A and a point charge of +1.0*10^-9C is placed at B. X is a point on the straight line through A and B. If a third charge C or charge 1.5*10^-9 is placed at X, where must X be for the resultant force to be ...
September 14, 2014

algebra
1. x=Y/2+3 2. y= -y/2 - 1/3
August 21, 2014

Math Question
Five students measure their height using different units. Andrew is 176 cm, Brittney is 5'4", Calvin is 1.8 yards, Don is 54 inches, and Elisha is 1.6 metres. Arrange the students from shortest to tallest. I don't know how to deal with different units! A truck ...
July 18, 2014

science
A force of 20 n gives a ball an acceleration of 4.0 m/s3 on a lever frictionless surface. what is the mass of the ball?
June 17, 2014

Physics
A 250g wood block firmly attached to a horizontal spring slides along a table with a coefficient of friction of 0.40. A force of 30.N compresses the spring 20cm. If the spring is released from this position what will be the block's speed when it passes equilibrium position?
June 4, 2014

physics
help?
May 15, 2014

social studies
thx guyz
May 12, 2014

Math 6
You discussing little poopie scrub
May 10, 2014

sitcom analysis
raising hope: what does jimmy see in sabrina?
April 24, 2014

sitcom analysis
why does jimmy feel his relationship is doomed? raising hope:
April 24, 2014

statistics
only be is right! the other parts are wrong
April 15, 2014

Precalculus
The height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. When graphed, the function gives a line with a slope of -0.4 . Suppose that the height of the candle after 13 hours is 24.8 centimeters. What was the height of ...
March 24, 2014

trig
Find csc(theta), tan (theta), and cos (theta), where theta is the angle shown in the figure. Give exact values, not decimal approximations c=10 b=7 a=7.14 the right angle is locate between sides a and b and the theta angle is an acutle angle sides b and c. i have sin theta as ...
March 24, 2014

trig
Suppose that Magnus' blood pressure can be modeled by the following function {{{p(t)=83-18sin(71pi*t)}}} Magnus' blood pressure increases each time his heart beats, and it decreases as his heart rests in between beats. In this equation, p(t)is the blood pressure in ...
March 23, 2014

Applied Math (Biological application)
I basically need help finding the rest of the solutions.
March 19, 2014

Applied Math (Biological application)
The deformation y(t) of heart muscle from its rest position after t seconds can be modelled as a spring-mass system, described by the differential equation: my" + vy' + ky = F(t) where m, v, and k are positive constants denoting the mass of the myocardial tissue, and ...
March 19, 2014

Trigonometry
Looks like its a triangle within a triangle problem. Still researching to try to find out how to solve
March 18, 2014

Trigonometry
figures above are correct not sure why it has me listed as Stephen. Also, hypotenuse of CB is 2537.98496522845. they are two attached triangles. CAB is the outermost triangle. CD is the opposite side of both triangles. CAD with the angle of 32 degrees. CAD has a hypotenuse of ...
March 18, 2014

Trigonometry
Mountain officials want to build a new ski lift from B to C as shown in the figure below. The distance from A to C is 1480 feet. They measure angle DAC to be 32 degrees and angle DBC to be 18 degrees. What is the distance A from to B? Round your answer to the nearest tenth of ...
March 18, 2014

English
Thank you Ms. Sue... Thank you Emmanuel
January 25, 2014

English
I am 3/7 of a chicken,2/3 of a cat and 2/4 of a goat. What am I?
January 25, 2014

Science??!!! :/
sorry i don't know:(
January 23, 2014

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