Sunday
April 20, 2014

Posts by Simon


Total # Posts: 128

Math
the larger angles of a rhombus are twice the smaller angle of the rhombus. if the shorter diagonal is 20, find the perimeter of the rhombus

Hypothesis Test
A test of hypothesis is performed to determine whether the proportion of Montrealers (population 1) who want the decriminalization of marijuana is greater than the proportion of Torontonians (population 2) who want decriminalization of marijuana. A random sample of 120 Montrea...

American history
The religion that is sometimes called Central America is actually apart of what continent.?

MGMT303
1. (TCO 2) Organizations have both an internal and an external environment. Describe the general environment and give at least one specific example of each dimension, other than the examples given in the text and in the lectures

physics
A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 4.4 x 1020 m, and the angular speed of the star is 7.3 x 10-15 rad/s. How long (in years) does it take for the star to make one revolution around the center?

physics
In the figure the man hanging upside down is holding a partner who weighs 535 N. Assume that the partner moves on a circle that has a radius of 6.50 m. At a swinging speed of 3.75 m/s, what force must the man apply to his partner in the straight-down position?

physics
A 17-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 29 N. Starting from rest, the sled attains a speed of 2.1 m/s in 9.6 m. Find the coefficient of kinetic friction between the runners of the sled and the snow.

ECONOMICS
WHAT ARE WELFARE PAYEMENTS OR CONSUMERS SUBSIDIES

math
A stadium is divided into 8 sections. Each section has 72 rows and each row contains 25 seats. How many seats are in the stadium.

Pharmacy
You have a 10 percent solution and your wanting to treat a patient weighing 4.5 pounds and the dose is 5mg/kg/ml. What is the dose?

Calculus
Use the limit process to find the area of the region between the graph of the function and the x-axis over the indicated interval. Sketch the region. y=2x-x^(3), [1,3]

Calculus
On the moon, the acceleration due to gravity is -1.6 meters per second per second. A stone is dropped from a cliff on the moon and hits hits the surface of the moon 20 seconds later. How far did it fall? What was its velocity at impact?

Life orientations
Discuss 5 impacts due to lack of infrastructure

economics
WHAT ARE WELFARE PAYMENTS OR CONSUMERS SUBSIDIES

Life orientation
Five practices that are in Contravention of the Basic conditions of employment Act

math
a box contain 60 oranges.3/5 of the oranges were equally shared among 4 boys.how many oranges did each boy received.

Math
Tiles is 2000cm bt its ans is wrong

Math
In evening my test plz help me to solve it A room length 3m,20m wide and 6m height. Find the floor is to be tiled.if each tile measures 60cm*50cm,find the no. Of tiles required.

Math
Bt its ans 6166.16cm^3

Math
The cross section of a pipe of length 49cm.the thicknes of the pipe is 1cm4mm and the outer diameter is 30cm.find the volume of the pipe.

Math
Water is poured into cuboidal container at the rate of 80liter per min. If the volume of container is 144m^3,find the no. Of hours it takes to fill the reservior.

Math
Plz help me

Math
Bt its ans is 1816.32cm^2

Math
A cylindrical tube is open at both ends.the internal diameter tube 10.4cm and its length is 25cm. If the thickness of the tube 8mm everywhere,find the total surface of area of the tube.

Math
A box measures 60cm*52cm*40cm.find the area of the cardboards required to make 280 such boxes.

Math
Thank you

Math
The radii of two cylinders 3:2 and height 7:4.find the ratios of their curved surface area.

Math
Please tell me how to solve it

Math
This is math qustn plz help me to solve it bcz tmrw my test soreply soon as soon A box measures 60cm*52cm*40cm.find the area of the cardboards required to make 280 such boxes.

Math
Thanx..

Math
This is math qustn plz help me to solve it bcz tmrw my test soreply soon as soon A box measures 60cm*52cm*40cm.find the area of the cardboards required to make 280 such boxes.

chemistry
Elemental zinc will react with acid to evolve hydrogen gas. This is a redox reaction. Write a balanced molecular equation for the reaction of zinc and hydrochloric acid, showing the coefficents and the phases of all reactants and products. Below is an example of the form of th...

chem
I2 + 5 Cl2 + 6 H2O 2 HIO3 + 10 HCl What is the reducing agent? In your answer give the element symbol and oxidation state.

chemistry
balance: Al2(CO3)3 --> Al2O3 + CO2 i dont know how to do the reactant side so i can figure out the product side...

math
started with= 5 min quarter= 75 min dime = 30 min nickle= 15 min add all the minutes then add to 9:00 am

chemistry HWK MAKES NO SENSE
Thank you!

chemistry HWK MAKES NO SENSE
balance: H3PO4 + Mg(OH)2 → Mg3(PO4)2 + H2O

chem
what is the number of moles of manganese (II) iodide in a sample whose mass is 650 g?

math exam tommrow review
-15p+6 solve for p? -15p+6=0 so 15p=6 p=6/15 or 2/5

physics
A 500N force is applied to a 25 kg block and accelerates it at 15 m/s^2. What is the force of friction?

science
A reaction took place between a magnesium and florine in a large empty container if attraction and repulsive between these atom are equal at a distance of 0.001*10^-10m, calculate the couloumbic force between two atoms.

Chemistry (Insulated Vessel, temperature and vol.)
Insulated vessel has two compartments separated by a membrane. One side is 1 kg of steam at 400 C and 200 bar. The other side is evacuated. The membrane ruptures filling the entire volume. The final pressure is 100 bar. Determine the final temperature of the steam and the volu...

Chemistry (Internal Energy)
5 kg of steam contained within a piston-cylinder assembly undergoes an expansion from state 1, where the specific internal energy U(1) is = 2710 [kJ/kg] to state 2, where U(2) = 2660 [kJ/kg]. During the process, there is heat transfer to the steam with a magnitude of 80 [kJ]. ...

physics
Calculate the power required of a 1190 kg car as it climbs a 11° hill at a steady 103 km h-1. The total friction and air resistance is 700 N. Answer in kW, to the nearest whole number.

physics
A skier travelling at 14 m s-1 reaches the foot of a steady upward 14° incline and glides 21 m along this slope before coming to rest. What was the average coefficient of friction?

physics
Total mechanical energy of a flying rubber ball is 2000 J. It has a velocity of 151 ms-1 and is 3.1 m above the ground. Find the mass of the ball. (2dp)

physics
A boy is sledding down a slope that is inclined at 30.0° with respect to the horizontal. A moderate wind is aiding the motion by providing a steady force of 108 N that is parallel to the motion of the sled. The combined mass of the boy and sled is 53.6 kg, and the coeffici...

science
how many seconds will it take for a saterllite to travel 450 km at rate of 120 m/s?

Chem-E / Chemistry
Calculate the rate of heat required to bring 1.80mol/hr of HBr gas from 37.0 C to 434.0C at atmospheric pressure (Heat capacity of HBr is described by eq.) Cp (kJ/mol * C) = a + bT + cT^2 + dt^3 T is in C and HBr - a = 2.910x10^-2, b= -2.27x10^-7, c= 9.887x10^-9, and d= -4.858...

Chemstry
Dry air is bubbled through 25 litres of water at a rate of 15 litres (STP)/min. The air leaving the liquid is saturated with water at 25 degrees celcius and 1.5 atm. How long it will take for all of the water to vaporize.

Chemistry
Find the volume, in L, of 100g gas mixture containing 10.0 mol% hydrogen in nitrogen at 30.0C and 5.00 atm. Use the avg molecular wt. what is the molar concentration of hydrogen, in mol/L, in the gas mixture? what is the average mass denisity in g/L

Chemistry
semibatch reaction: C6H6(l) +Cl2(g) ==> C6H5Cl(l) + HCl(g) C6H5(l) + Cl2(g) ==> C6H4Cl2(l) + HCl(g) C6H4Cl2(l) + Cl2(g) ==> C6H3Cl3(l) + HCl(g) \reactor contained 11.0 mole of benzene and a product mixture in which the amt of mono-chlorobenzene was 3x the amt of dichl...

Chemstry
For the reaction A(g) + B(g) <==> C(g) + D(g) the equilibrium constant K is defined as K = Y(sub y) * Y(sub D) / (Y (sub A) * Y(sub b)) where y is the molar fraction of the gas phase of a species At 620.00 K, the equilibrium constant is 1.100. Suppose the feed to a react...

Chemistry
Distillation Scale up: In an experiment 100 lb-mol of 47 lb-mol % ethanol, 53 lb mol % water sol'n is fed into distillation column and separated into two streams: 100lb-mol 0.470 lb-mol ethanol 0.530 lb-mol water goes to: steam 1: 17 lb-mol 0.890 lb-mol Ethanol 0.110 lb-mo...

math
ralph would like to make a spinner with three diffrent colored regions so that a person would expect to spin the first color half the time,the second color one-third of the time,and the third color one-fourth of the time.is it possibe to make a spinner?Explain

Life orientation
10-15 lines discuss 5 ways in which the human or environmental problem impacts on the community.

physics
Phy 124 – Chapter 22 Problems 1. Consider the following. A spot on a boat is 2.5 m above the water, and the light strikes the water at a point that is 8.0 m horizontally displaced from the spotlight. The depth of the water is 4.0 m. Determine the distance d, which locates...

equation
the smallest 3 consecutive integers is added to twice the largest , the result so obtained is fifteen less than four times the middle integer. find the integers

math
the distance between 2 station A and B is 230 km .two car start simultaneously from A and B in the opposite directions and the distance between them after 3 houra is 20 km. If the speed of one car is less than that of the other by 10 km per hour, find the speed of each cars. (...

Calculus
Greetings, This is a question about selecting courses for my semester. I was planning to take Calculus 3 (Mostly 3-Dimensional topics involving calculus) and a C++ programing course. If you have heard of these courses, can you please tell me your thoughts about me taking these...

Linear Algebra
Let v1= (1,1,2,1) v2= (0,1,3,3) v3= (1,-1,-4,-5) v4= (1,0,-2,-4) a) Let U=span{v1,v2,v3,v4}. Find the dimension of U b) Is span {v1,v2,v3,v4}=R4? c) Find a basis for U Very Much Appreciated!!!

Linear Algebra
A test Question: Find the parametric equations of the line through the origin that is orthogonal to the plane 2x+4y-z=0

Electricity and Magnetism
This was actually a test question: Additional Information: This question is based on the Hall effect in a wire. Question: I want you to build a magnetic feild sensor. You have all the properties of the materials and the dimentions of the sensor. a) derive a formula for a magne...

Linear Algebra
Find the basis for the following vector space. Please state the dimension of the vector space. S consists of all x in R3 such that x is orthogonal to n=(2,3,2)

linear math
Let u=(2,0,k,-1) v=(-4,0,-3,2) and w= (0,1,0,0). Each answer must be justified(there is no answer where k=nothing) a) find all values of k, (if any) for which u is orthogonal to v b) Find all values of k (if any) for which the set {u,v,w} is linearly independent. Find all valu...

Math
The length and width of a rectangle are (x+4) cm and x cm respectively. Write down expressions for: A. The perimeter of the rectangle B. The length of the side of a square with the same perimeter If the sum of the areas of the square and the rectangle is 94 cm^2 , find x. Expl...

Biology
Why (in detail please) in the carboxypeptidase mechanism, the weak bonds between an enzyme and a substrate will stretch the peptide bond of the substrate which lowers the bond energy? I just want to know why in detail this happens... Thank you.

Russian
a

maths
no worry found the solution to be 200000((t-7/10)^2+1/100) first by multiplying out as above to get 200000t^2-280000t+100000 then taking out the factor of 200000 to get 200000(t^2-7/5t+1/2) then using the formula x^2+2px=(x+p)^2-p^2 to get 200000((t-7/10)^2-49/100+1/2) simplif...

maths
(400t-300)(400t-300)+(200t-100)(200t-100) complete the square showing all steps

Social Studies
why greater responsibility is placed on the husband in marriage

Quantum Physics
I dont understand why you've used 4 pi in your answer, i assume your rearranged the uncertainty principle equation for delta Px, but isnt the reduced plancks constant h/ 2pi instead of 4pi ?

discreet math
verify that f(n) = 1 + 2 + 4 + 8+..+ 2^n has order 2^n

LIfe orientation
I think the community will encountor many problems due to substance abuse

Physics 30
I see now that my question was already answered.

Physics 30
It takes a plane flying at 150 km/h 3.0 minutes to circle around a cloud at an altitude of 3000m. What is the diameter of the cloud?

Physics HELP! QUICK!
So does that mean you can just use friction force without resolving it into its components, and so what you use in you equation would be: M V^2/R = M g sin A - M g cosA*mu (This is what you did in the previous example) So did you basically just ignore the vertical component of...

Physics HELP! QUICK!
A banked circular highway curve is designed for traffic moving at 55 km/h. The radius of the curve is 220 m. Traffic is moving along the highway at 38 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow cars to take the turn ...

English
Hey "drwls" can you explain to me how you solved a previous physics question that you answered? It's for the following question below, and it's already posted on here. Unfortunately, it didn't allow me to post the link to it, so you may have to search for...

English lit
Alright thank's!

English lit
Who would have thought...eheh last week I had a literature exam about ''The Necklace''. Thanks for the good, tragic, idea. By curiosity, why would the father kill himself? If other people have more ideas, be free to post. Thanks all.

English lit
Thank's for pointing that out Writeacher. I approve that Ms Sue's classic story is more in the spirit of Christmas, but I'm more in search of a story with a suprising ending. When you read the end, you're like : wow, who would have thought that...

English lit
So, for my english class, I'll have to write a Short story ( Exposition Rising Action Climax Falling action Resolution ) I'd like the story to be around the theme of christmas or horror during x-mas. So I need you guys to help inventing a story with a surprising ending...

Math
Reiny is right.

earth
? = 8 :D

physics
Also how did you just substitute mg in for the Normal Force. Cause when I solved for the normal force from the vertical components I got: FNcos A + mu*FNsin A = mg FN = mg / (cos A + mu*sin A) And I basically just substituted that into: FNsin A - mu*FNcos A = m*v^2/R I solved ...

physics
I know its been a while, but I'm just wondering how drwls solved the question without resolving friction into its x-component because isn't the centripetal acceleration directed horizontally instead of parallel to the incline and wouldn't the friction force be para...

Statistics
0.0213

Biology
thanks !

Biology
prokaryotes are not found in following kingdoms, except: (a) Monera (b) Protoctista (c) Animalia (d) All of these Help please!

Biology
prokaryotes are not found in following kingdoms, except: (a) Monera (b) Protoctista (c) Animalia (d) All of these Help please!

Chemistry
Opps... spelled Chemistry wrong.

Chesitry
Calculate the energy needed to melt 50.0 L of nitrogen (N2).

Algebra
(2*x)(4*y)=192

math
In a test, the average was 74 points/100 points. After the test, three of students relocate. Then the average was 75 points/100. The circumstances of the students were 6:5:3. How many points did the three students have? I know the answere is 45, 75 and 90, but can you write th...

math
In a test, the average was 74 points/100 points. After the test, three of students relocate. Then the average was 75 points/100. The circumstances of the students were 6:5:3. How many points did the three students have? I know the answere is 45, 75 and 90, but can you write th...

algebra
The countries "Drømmeland", "Erkerivalia" and "Fantasia" had a competition. Please tell me how maney gold medals the won each with these sentences. 1. They won 17 medals in all 2 "Erkerivalia" won three times more medals than &quo...

sicence
If you place a metal ring in a region in which a magnetic field is rapidly alternating, the ring may become hot your touch, why? be as specific as you can

Math
Barter question: name will give for a 1 marble 2 paper clips m 2 marker 1 pencil r 5 notepads 4 markers l 1 pencil 5 paper clips g 3 erasers 5 notepads Question how does a get erasers?

math
Logarithm!!! Select all of the following that are true statements: (a) log(2x) = log(2) + log(x) (b) log(3x) = 3 log(x) (c) log(12y) = 2 log(2) + log(3y) (d) log(5y) = log(20y) – log(4) (e) log(x) = log(5x) – log(5) (f) ln(25) = 2ln(5) (g) ln(1) = log(1) (h) ln(e) = ...

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