Thursday
April 17, 2014

Posts by stephen


Total # Posts: 136

Physical Science 9
what part of the carbon process is responsible for the release of carbon at a p[power plant combustion photosynthesis digestion decomposition my answer is a combustion

Health
I would agree but that was all that was given for the question.

Health
a boy notices a special needs student sitting by himself during recess. How can he get the student involved in a meaningful way? a- coach one of the teams b- be the all time referee c- the game be modified to allow for 2 goalies d- the game be played by regular rules so the bo...

Science
What type of a bond is a metal cation likely to form?

Science
How did the discovery of neutrons change the atomic model?

Trigonometry
hyptotenuse AC= 1480 opposite CD= 784.28056 adjacent AD 914.7554

trigonometry
Use a sum-to-product formula to rewrite cos5w+cos2w as a product.

algebra
Forest ranger measure depth of 82 inches of snow on a mountain peak at 8am. Snow is expected to fall at a steady rate of 3/4 inch per hour. write an equation that approximates the depth "y" of snow on the mountain peak "x" hours after 8am.

economics
the performance of S.A economy from jan2009 to dec2011

Programming
I need help with debug Debug06-02 // Program lets user input scores on four tests // Average is computed and letter grade is determined // Letter grades are based on 90 for an A, 80 for a B, and so on start string name num score num NUM_TESTS = 4 num NUM_RANGES = 5 num RANGES[...

Science
At which point is more silt in the water in the mountains or on flatland why

Life orientation
Critically discuss 5 ways in which the environment problems impacts on the community.

CHEMISTRY
1.AN ORBITAL can have at the most two electrons of opposite spine can be called ?

Math-Help
Plug the slope of 61.6, y of 585 and an x of 30 to get the y-intercept of -1263 which is b. So your formula would be y = 61.6x - 1263 for this problem.

Chemistry
If you add 100 g of salt to 5 Kg of cooking water, how will it effect the boiling point? (molar mass of NaCl 58.5 g, Kbwater=0.51 degrees/m)

Chemistry
Given Zn(NO3)2 + (NH4)2S = ZnS + 2NH4NO3 (molar mass of Zn(NO3)2 189 g, molar mass of (NH4)2S 68 g), what is the molarity of a 250 ml solution if you have 123 g of zinc nitrate?

chemistry
How many Liters of a 5.00 M Zn(NO3)2 would be needed to react with 200 g of (NH4)2S?

CHEMISTRY
WHAT IS ATOMICRADIUS

chemistry
C2H6 + O2 -> CO2 + H2O How many g of carbon dioxide are produced at the same time as 360g of water vapor in the burning of ethane

phy
a watermelon seed has the following coordinates: x= -5.0, y = 8.0m, and z = 0m. find its position vector (a) in unit-vector notation and as (b) a magnitude and (c) an angle relative to the positive direction of the x axis (d) sketch the vector on the right-handed coordinate (3...

phy
D D A A B C D D D C

phy
D D A A B C D D D C

phy
D D A A B C D D D C

phy
a d a c d d d c c a a d b b d d a a a d

math help!
Solve using aritmetic progression and quadratic equation, how? Sum of AP = n/2(2a+(n-1)d) Where n is the number of terms, ie in your case the number of rows of seats, 'a' is the number in the first row (a=262) and 'd' is the difference in the next row (d=18). S...

Math
1. The curve y=10/2x+1 -2 intersects the x-axis at A. The tangent to the curve at A intersects the y-axis at C. (i) Show that the equation of AC is 5y+4x=8 (ii) Find the distance of AC 2. The equation of a curve is y=1/6(2x-3)^3-4x (i) Find dy/dx (ii) Find the equation of the ...

math
which of the following illustrates direct variation?and the number and its reciprocal.

trigonometry
How do i do them? :l 7. At 2:00 P.M., the angle between the hour and minute hands on a clock is 60° (approximately 1.05 radians). The arc length formed by the two hands is 2.63 inches. What is the radius of the clock in inches? (Round to the nearest tenth.) 10. A pulley wi...

College Physics
14) Given the following vectors, find the magnitude and direction: • A = 47 m and the angle is 0° • B = 62 m and the angle is 35° This is relative to the x-axis Magnitude: 401 m 140 m 104 m 0 m 503 m Direction: 20° 45° 55° 220° 90°

math
what is the volume of a rectangular prism l=7in.w=5in.h=3in.

math
what is the volume of a rectangular prism l=7in.w=5in.h=3in.

math 121
Henry will reject a cookie with less than 8 raisins.In the past, one out of every 100 cookies had less than 8 raisins. Find theprobability that the first cookie Henry rejects is the 5th cookie on the line.

chemistry
I have been knocking around this question for what seems to be an eternity. We have not gotten that far in this class so this is for extra credit. I have managed to get myself confused about something that should be easy. 25mLof tartaric acid solution is titrated against 31mL ...

chemistry
25mL of tartaric acid solution is titrated against 31mL of NH4OH. What is the normality of the NH4OH? Please explain how to work this problem.

chemistry
2,3-Dihydroxybutanedioic is tartaric acid HOOCCH(OH)CH(OH)COOH MOL WT> 150.09 What is the result of using 75g of this tartaric acid in one liter as a titration. I am not told what the one liter solution is for the titration.

chemistry
what is the result of using 75g of dihydronoxybutanedioric acid in one liter of H2O in a titration? I do not have a answer.

chemistry
25 milliliters of tartaric acid solution is titrated against 31 milliliters of NH4OH. What is the normality of the NH4OH?

Maths
A perfectly cylindrical container standing upright with a top and bottom(an oil drum or coke can for example) of area A has an empty mass of M and a height of H. It is filled with a liquid of uniform density(p)up to the height of h. When the container is full the centre of gra...

ap physics
A 650N man jumps out of a window into a fire net 8m below. The net stretches 1.5m before bringing the man to rest and tossing him back into the air. What is the maximum potential energy of the net compared to its unstretched potential energy?

physics
When an object is moving downwards its weight is 0kg.Because is in free-fall experiences the gravitational force.

Calculus
y = √3x + 2 cos(x), 0 ≤ x < 2π Find a derivative y'.

Trigonometry
The expression log(x^n/ radical y)is equivalent to 1. n log x - 1/2 log y 2. n log x- 2 log y 3. log (nx) - log (1/2y) 4. log (nx) - log (2y)

math
-4

College Algebra
What is the answer to: The plane was purchased new in 2006; therefore, x = 0 represents the year 2006. X - axis (horizontal)= years starting from 0= 2006 and increasing by 0.5 years X - axis (vertical)= price in $ amounts from 24,000 to 240,000 a). List the coordinates of two ...

chemistry
Find the amount of solute deposit when 200 cm 3 of the solution is cooled from 55oc to40oc.

Physics
A horizontal force of 234 N causes a 350 N object to accelerate across a horizontal floor. if the coefficient of friction is 0.15, what is the value of the frictional force opposing the acceleration?

Geometry
a parallelogram has the vertices (0,3), (3,0), (o,-3), and (-3,0). determine what type of parallelogram and find the perimeter and area

math
what is the GCF of 300 and 225 using prime factorization

translat english to french
what ido after school when i close from school i eat my snack and itake my bath for the afternoon then i rest for some thirty minutes atfer taking my short rest i join my mother in the kitchen toprepare dinner on days that i do nothave private studies but on days that i have s...

physics
A car has a mass of 1.34 × 10^3 kg. If the force acting on the car is 6.46 × 10^3 N to the east, what is the car’s acceleration?

MATH
I am a number between 0.23 and 0.31. I have 3 digits. All of my numbers are the same. What number am I?

math
I am a number between 0.23 and 0.31. I have 3 digits. All of my numbers are the same. What number am I?

Physics
A flowerpot falls from a window sill 37.6 m above the sidewalk.? A) What is the velocity of the flowerpot when it strikes the ground? The acceleration of gravity is 9.81 m/s2 ? B) How much time does a passerby on the side-walk below have to move out of the way before the flowe...

Physics
Whoops, the question is: A flowerpot falls from a window sill 37.4 m above the sidewalk.

Physics
A) What is the velocity of the flowerpot when it strikes the ground? The acceleration of gravity is 9.81 m/s2 ? B) How much time does a passerby on the side-walk below have to move out of the way before the flowerpot hits the ground?

french
what is the french of I love you?

Math
a/b + b/a = x a/b - b/a = y in the equation above, if a is (not equal) to 0 and b is (not equal) to 0, which of the following must be equal to x^2-y^2? a. 2 b. 4 c. ab/2 d. a^2 b^2/2 e. 4a^2b^2

Math
AB+BA = 1A4 In the correctly worked out addition problem above, A and B represent two different digits. What digit does A represent? a 3 b 4 c 5 d 8 e 9

Math
The sum of two numbers that differ by one is x. In terms of x, what is the value of the lesser of the two numbers? a. x+1/2 b. x/2 c. x-1/2 d. x/2 -1 e. 2x+1/2

Math
so whts the answer

Math
a/b + b/a = x a/b - b/a = y in the equation above, if a is (not equal) to 0 and b is (not equal) to 0, which of the following must be equal to x^2-y^2? a. 2 b. 4 c. ab/2 d. a^2 b^2/2 e. 4a^2b^2

calculus
find the most general antiderivative of the function f(t)=8t-3sec^2t

Physics
A 70 kg man carrying a 10 kg suit case climbing a ladder of 5 m in two minute, power developed by the man is (g=10 m/s2 ).?

Maths calculus
A rectangular box has a square cross-section and the sum of its length and the perimeter of this cross-section is 2 m. If the length of the box is x m, show that its volume V m^3 is given by V = [x(2-x)^2]/16. Hence find the maximum volume of the box.

science , chemistry
Is lowering of vapour pressure also a colligative property? since mathematically p*a - pa/p*a=xa =>p*a-pa=p*aXa => p*a-pa~xa

Computer Science
Cell formulas are usually displayed in the cell, while the contents are displayed in the name box T or F ??

ap chemistry
Arrange the following 0.10 M solutions in order of increasing H+ : HClO4 , H2SO4, NH4Br , KCN, KBr, KOH

chemistry
How can precipitates be dissolved? never? by adding constituent ions to the solution? by complexing one of the constituent ions in a soluble form?

chem
What mass of hydrochloric acid (in grams) can be neutralized by 2.3g of sodium bicarbonate? (: Begin by writing a balanced equation for the reaction between aqueous sodium bicarbonate and aqueous hydrochloric acid.)

physics
a .1kg particle with velocity of 5m/s comes in to contact with a solid cylinder at rest of mass 1kg and radius .2meters. what is the final angular velocity

chemistry
When 15.3g of NaNO3 was dissolved in water inside a constant pressure calorimeter, the temperature fell from 25.00 °C to 21.56 °C. If the heat capacity of the calorimeter (including the water it contains) is 1071 J/°C, What is the enthalpy change for dissolving 1 m...

college algebra
2/3(5/4+2d) + 1/3=2/5

college algebra
5+2(4y-4)=3(2y-1)solve

science
how does(what is the chemistry involved) k2so4 raise the boiling point of h2so4

chemistry
How many moles of calcium bicarbonate are needed if 10.0 grams of sodium bicarbonate are used?

8th Grade Chemestry
Helping my child study. Are there any online guides that can help me teach how to predict the products of a reaction. i.e. _ Ag(NO3)+ _ CaCl2 yields Really want to be able to teach my child how to do this rather than have the answer. Thanks

8th Grade Chemestry
Helping my child study. Are there any online guides that can help me teach how to predict the products of a reaction. i.e. _ Ag(NO3)+ _ CaCl2 yields Really want to be able to teach my child how to do this rather than have the answer. Thanks

8th Grade Chemestry
Helping my child study. Are there any online guides that can help me teach how to predict the products of a reaction. i.e. _ Ag(NO3)+ _ CaCl2 yields Really want to be able to teach my child how to do this rather than have the answer. Thanks

math
A ship is 400 miles directly north of the tahiti and is sailing south at 20mi/hr. another ship is 300 miles east of tahiti and is sailing west at 15mi/hr. at what rate is the distance between the ships changing?

math
suppose you are drinking root beer from a conical cup. the cup has a diameter of 8 cm and a depth of 10 cm. as you suck the straw, root beer leaves the cup at the rate of 7 cm^3/second. at what rate is the level of the liquid in the cup changng when the liquid is 6 cm deep?

math
A baseball player hits a line drive to center field. As he rounds second base, he heads directly for third, running at 20 ft/sec. How fast is the distance from the rnner to home plate changing when he is halfway to third base?

math
Bacteria are growing in a circular colony one bacterium thick. the bacteria are growing at a constant rate, making the area of the colony increase at a rate of 12mm^2 per hour. How fast is the radius changing when the radius is 3mm?

Math
Add parentheses to 9+8*7-6*5+4*3+2 so that the value of the expression is 105

Math HELP
The table below shows the measured dimensions of a prism, and the maximum and minimum possible values based on the greatest possible error. Dimensions l w h Measured 9 5 3 Maximum 9.5 5.5 3.5 Minimum 8.5 4.5 2.5 a. Find the measured volume. b. Find the maximum volume. c. Find ...

Microeconomics
In a patent-driven market, using the concept of minimum efficient scale of production, explain what would happen to competiton and to price when the patent expires? I don't see how I can interweave the minimum efficient scale of production into this question. I know that i...

physics
during 4.0 min a 5.0 a current is set up in a wire,how many coulombs and the electrons pass through any cross section across the wire?

Chemistry
8.9

math
write an expression whose value equal 10

math
782

science
What do you call a high island that rises from the deep ocean floor on a volcanic foundation?

science
What do you call a high island that rises from the deep ocean floor on a volcanic foundation?

english
when writing an essay about a nonfiction book what tense should i use

Chemistry
Three gases (8.00 of methane, , 18.0 of ethane, , and an unknown amount of propane, ) were added to the same 10.0- container. At 23.0 , the total pressure in the container is 3.90 . Calculate the partial pressure of each gas in the container.

math
where does cos(x) and sin (x) intersect in the first quadrant? Thanks

math
simplify 1/x+h - 1/x

Finance
If I invest £25,000 a year each year for 16 years and get a 5% return what will my total capital be ?

Chemistry
Given the reaction shown below, calculate: (a) The amount of NO2, in grams, generated from reactants if 300.23 kJ of heat energy is released during the course of the reacton. (b) The heat energy released if 33.23 grams of O2 is consumed in the reaction. 2 NO(g) + O2(g) „_...

Chemistry
Given the enthalpies of formation for the following substances, determine ƒ´Hrxn for Cl2(g) + C2H2Cl2(g) „_ C2H2Cl4(g) Substance ƒ´H (kJ/mol) Cl2 0 C2H2Cl2 4.27 C2H2Cl4 ¡V155.6

Chemistry
What will be the final temperature of a 22.0 g piece of iron (Cp = 25.09 J/K • mol), initially at 25°C, if it is supplied with 28.2 J from a stove?

Chemisty
In an experiment, 230 kJ of heat energy are released to the surroundings when steam is converted to liquid water. Calculate the number of grams of water condensed. The following data may be of use: vap = 2260 J/g; Hfus = 334 J/g; Cp(ice) = 2.06 J/g ...

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