Friday
July 25, 2014

Posts by Angel


Total # Posts: 856

Chemistry 111
what is the molar mass of Butane,C7H10?

Chemistry 111
How many moles of nitrogen N are there in 71.0g of Nitrous Oxide(N2O)?

Chemistry 111
What is the mass of 7080 moles of magnesium chloride (MgCl2)?

physics
Calculate the quantity of heat required to raise the temperature of 2.00 g of water 4.00◦C.

physics
A system is provided 50 J of heat and work done on the system is 10 J. What is the change in internal energy

Physics
A spherical piece of metal has a radius of .250m and a mass of 503 kg. what is its specific gravity?

physics
A satellite explodes in outer space, far from any other body, sending thousands of pieces in all directions. How does the linear momentum of the satellite before the explosion compare with the total linear momentum of all the pieces after the explosion?

physics
Two identical cars have the same speed, one traveling east and one traveling west. Do the cars have the same momentum?

physics
thanks that wesite is very helpful

physics
Im sorry 3.45 meters

physics
Whats the force of attraction between a 15.0kg box and a 63.0kg person if they are 3.45 apart?

Life orentation
A clear explanation of how smoking is a human factor that may cause ill health, accidents, crises or disaster?

Math
Ben takes 6hrs to get a job done & Ted takes 11hrs to get the same job done. If they work together how long will it take them?

Statistics
What does the scope of the graph refer to?

Product of Terms [ 9th Grade]
Is this exactly the way the terms are presented in our text book?

8th grade math
-First find the cost per ounce: 2.80 divided by 20 = .14 per ounce -Then, multiply by 35 to find the price for 35 ounces: .14 x 35 = 4.90 -Therefore, a 35 ounce bag of popcorn would be $4.90! Hope this helped!

aleg/trig
two forces of 14and 30 act on a body forming an obtuse angle w/ eachother. if the resultant is 60, whats the angle betweeen the 2 forces?

alegbra/trig
x^2+2x-15=0 solve by completing the square

statistics
The table below shows the number of girls who ran certain distance. -------------|---|----|---|----|----|--Distance(Km) | 5 | 10 |15 | 20 | 25 | -------------|---|----|---|----|----|--No. of girls | 2 | 1 | 3 | 4 | X | -------------|---|----|---|----|----|-- Given that the med...

life orientation
5 ways in which alcohol abuse impacts the community

Drug addiction substance
Human factors that cause ill health.accidents,crises/disaster and an appropriate way to deal with these

Chemistry
Can an acidic solution be made less acidic by adding an acidic solution?

Physics
If mass=100 tones, speed=8kn/s,height above ground=100km. What is the mass in kg?

life orintation
Pollution

MATH
We want an estimate of the mean time required for ships of a particular class to cross the Pacific Ocean from San Francisco to Tokyo. Little is known about the distribution of the mean time for this class of ships to cross the ocean due to the age variation of the ships. It is...

Geology
Why isn't the land surface of Earth flat after millions of years of erosion by mass wasting as well as by other erosional agents?

Geology
If you were building a house on a cliff, what would you look for to ensure that your house would not be destroyed through mass wasting? Be thorough! Give me AT LEAST two things.

Geology
Describe the effect of shear strength on the following: a.) slope angle b.) orientation of planes of weakness c.) water in soil d.) vegetation Be thorough and THINK!

Geology
If you were building a house on a cliff, what would you look for to ensure that your house would not be destroyed through mass wasting?

science
please help.....i dont have my txt book with me an i need 2 kno everything bout Non-Vascular and Vascular plants....please rovide a website...........i cant find any

scirence
hpw do water and dissolved materials move through non-vascular plants?

Maths
The right rectangular prirm is the diagqam when x=7cm, y=5cm and z=1ocm

math help!
How many different 5-person subcommittees can be formed from a club having 13 members?

chemistry
why is it a bad idea to use lead in ceramic object that are used to serve food

Geology
PLEASE HELP By applying the various principles, draw a cross section of an area in which the following sequences of events occurred. The relative time relationship for all events should be clear to you from your single cross section that shows what the geology looks like at pr...

9th grade math word problems
i never can do word problems....please help... i got 7 of them.....these are word for word 1) Larry is 8 yrs older than his sister.In 3 yrs, hr will be twice as old as she will be then.how old is each now? 2) Jennifer is 6 yrs older than Sue. in 4 yrs, she will be twice as old...

math
i never can do word problems....please help... i got 7 of them.....these are word for word 1) Larry is 8 yrs older than his sister.In 3 yrs, hr will be twice as old as she will be then.how old is each now? 2) Jennifer is 6 yrs older than Sue. in 4 yrs, she will be twice as old...

algebra
a train leaves at 2pm heading due south at 60 mph. a second train leaves at 3:15pm heading due north at 80 mph. at what time will they be 250 miles apart?

Chemistry
Express the rate of the reaction 2C2H6 + 7O2 -> 4CO2 + 6H2O in terms of: a. Delta [C2H6] b. Delta [CO2] Show work please

Math>>>>if anyone could check my answer
this problem is difficutl for me i have an answer but im unsure so if someone could check my answer please. heres my problem: A light year is the distance that a light travels through a vacuum (space without matter) in one year. A light year is about 9.46 x 10^12km. The distan...

science
Replication is called "semi-conservative" because half of the orginal strand is? idk i been workin on the question 4 an hr!!

survey of science
if a automobile with a mass of 500kg hits another car that has a mass of 650kg produces a force of 1800n, find the acceleration

Managerial Accounting
The questions in this exercise are based on JetBlue Airways Corporation. To answer the questions, you will need to download JetBlue’s 10-K/A for the year ended December 31, 2004 (10K/A with a filing date of March 8, 2005). You do not need to print the 10-K/A to answer the...

math
ty

math
6n2-19n+15=o (the 2 is an exponent) idk how 2 do it the teacher told us how but didnt show us plz help

legal terminology
Defamation through speech or another heard medium is known as A. libel. B. slander. C. damage. D. damage. my answer B

algebra2
f(x)=3(x+18)(x-8)

chemistry
John has three bottle of mineral acid but does not know which is which since he did not label the bottles before filling them. Suggest a method to which could be used to identify the acids.

Math
Convert these unlike fractions to equivalent like fractions and add them. You must use the LCD to get the answer correct. If possible, reduce the final sum. 1/7 = ?/? + 3/14 = ?/? __________ ? - ??

MATH
-9 is a member of which subset of real numbers

English
also check for Capilization!!

ENGLISH
excuse me but I just wanted you to checka nd make sure that my commas was in the right place and if there is any other place I need to put some. I know that it is a little wordless but I am transcribing a message and that is what they said.

ENGLISH
Please read for errors and correct them. Thank you for your request for a credit card with our store. Before we can issue you a credit card, we must ask you to furnish the information on the enclosed credit application. When we receive it we will process your application as qu...

geometry
a cable attach to the top of a tv antenna is 100ft long if the cable is fasten to the ground 28 ft from the base of the antenna how tall is the antenna?

geometry
a cable attach to the top of a tv antenna is 100 ft. if the cable is fasten to the ground 28 ft from the base of the antenna how tall is the antenna?

Life orientation
Working on holidays. During lunch break.working when you are ill.

Life orientation
Working on holidays. During lunch break.working when you are ill.

math
how do i make this a true sentence? 3=4+3-1/2

Finance
This morning you purchased a stock that will pay an annual dividend of 1.90 per share next year. You require a 12 percent rate of return and annual dividend increases as 3.5 percent annually. What will be your capital gain be on this stock if you sell it 3 years from now?

English
I have to edit these. Add any words needed for grammatical or logical completeness 1. Very few black doctors were allowed to serve in the Civil War, and their qualifications had to be higher than white doctors. 2. Producers of violent video games are not capable or interested ...

chemistry
Analyze the chemical reactions that take place when a biological catalyst combines with a reactant (substrate) to form an unstable intermediate.

algebra
ty

algebra
i have 2 solve by elimination an i keep gettin fractions when the answer is (-3,-3) my teacher gave me the answer an problem but she wants me 2 work it out idk how i keep gettin fractions the problem is: -3x-4y=21 8x-5y=-9 please help

algebra
o ok ty

algebra
3x+5y=0 2x-5y=-9 idk how 2 solve it then graph it my teacher eont help me plzz help

chemistry
Analyze the properties of a sodium atom and a sodium ion. What are the differences in mass, stability, and reactivity that are caused due to the differences between the sodium atom and sodium ion?

AiMS MATH
i cant remember how to find the value of the squareroot of 484. can anyone give me some steps or something.

AiMS MATH
sorry accidently clikd submit

AiMS MATH
i cant remember how to find the value of the squareroot of

AiMS MATH
yeah. thx

AiMS MATH
-5 Is A Member Of Which Subset Of Real Numbers. a) natural numbers b) whole numbers c) intergers d) rational numbers e) irrational numbers

algebra
graph triangle rst with vertices r(-1,3),s(4,-2), t(2,-5) Draw the image triangle r's't' formed by rotating triangle rst 90 degree, 180 degrees, and 270 degrees about the origin. Give the coordinates of r',s', and t'.

math graphing the y-intercept
o ok thx

math graphing the y-intercept
the website helped but it dont have it for fractons how do i do it with fractions?

math graphing the y-intercept
it helps but how do i do fratcions?

math graphing the y-intercept
ty

math graphing the y-intercept
y=2/3=1 dont know how 2 solve it 2 get the y-intercept dont know how 2 graph it please help and explain it please

math graphing the y-intercept
2 y=- +1 3 dont know how 2 solve it 2 get the y-intercept dont know how 2 graph it please help and explain it please help

math graphing the y-intercept
y=2over3=1 dont know how 2 solve it 2 get the y-intercept dont know how 2 graph it please help and explain it please

math
o ok thx

math
8(4u-1)-12u=11(2u-6) 32u-8-12u=22u-66 -12 20u-8=22u-66 -20u -8=2u-66 -8 2u=74 u=37 i kno 1 messed up but idk where

Spanish 1-Please check and help
no problemo

math algebra 1a&1b
ty

math algebra 1a&1b
the problem is 2(9n-1)+7(n+6)=-60 i get how 2 do it but i get confused on wat 2 do and then i get mixed up and mess it up please help

math
the lenght of the hypotenuse of a right triangle is 4cm. the lenght of one leg iz 2m. find the lenght of the other leg.?

math
i thought you had to substract when you have to find the hypothenuse.? and add when you need to fid the lenght of a leg.

math
what is the lenghts of the hypothenuse if the lenghts of the legs of a right triangle are 5cm and 12cm.?

MATH please help!
which set is infinite? P = {positive numbers less than 60} Q = {whole numbers between 10 and 20} R = {intergers ge=reater than 18} S = {even numbers between 5 and 15} P, Q, R, or S

Aims Math
what is the contrapositive of this statement "If two polygons are congruent, then they are also similar"

Physics
Consider the resonant frequencies of a 1.78 m tube closed at one end at 24°C. a) Lowest resonant frequency = Hz HELP: You know the length of the tube. What else do you need in order to calculate the frequency of the lowest resonance of a tube that's closed at one end? ...

Physics
Ultrasound reflected from an oncoming bloodstream that is moving at 30 cm/s is mixed with the original frequency of 1.3 MHz to produce beats. What is the beat frequency? (Velocity of sound in blood = 1540 m/s.) Beat frequency = Hz HELP: This problem involves two Doppler shifts...

HSM/220
Why does it seem like nobody wants to help with this problem? I am lost here too, a simple answer could help soo many people!

College math
Analyze x²-6x-5y=1. Determine the vertex, focus, directrix, intercepts, axis of symmetry, and at least 2 other points on the graph.

college
Old Hickory rolled into Washington with such force that an era is named after him. Ending years of what he (and many Americans) considered to be elitist government, Jackson threw open the doors of power to the people, and remade the executive branch in the process. Previous to...

statistics
A large number of samples of size ‘n’ are selected from a population and the mean of each sample is determined. What can be said about the mean of the sample means

music
my school subject is music

math
multply to find an equivalent fraction 3/4

Physics
A cooling fan is turned off when it is running at 920 rev/min. It turns 1100 revolutions before it comes to a stop. What was the fan's angular acceleration? How long did it take the fan to come to a complete stop?

Math
Please help! x-2y+z=7 2x+y-z=0 3x+2y-2z=-2 a. Solve the above system of equations using Gaussian Elimination or Gauss-Jordan Elimination. You must show row operations. b. Solve the above system of equations using Cramer's Rule.

Qestion bout WH
how can i get a better gradfe wen i cant remember all the stuff only bits and pieces

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