# Posts by matt

Total # Posts: 2,399

A charge Q = +4.5 uC is located at the origin and is fixed so that it cannot move. A small object with mass m = 2.0 g and charge q = +8.0 uC is released from rest at point A on the x-axis at x = 2.0 cm. The small object moves without friction along the x-axis under the ...

world history
identify zhongguo

A charge of +Q and a charge of +2Q are separated by a distance r. The electric force of +2Q on +Q has a magnitude of F and is directed to the right. Which one of the following statements is correct regarding the electric force of +Q on +2Q? (A)The electric force of +Q on +2Q ...

algebra
6b+14=-7-b can u help me find out what b stands for in this problem.

Trigonometric
Given that sinx = 7 /25 pi/2 <or equal to x <or equal to pi Find the value of cos 2x

Calculus
A car traveling 132 feet per second decelerates at a constant rate to 60 feet per second in three seconds. A. what is the negative acceleration? B. How long after the brakes are first applied will it take to come to a complete stop? C. How far does it travel before coming to a...

Chemistry
1000/(1.6*10^-24) = 6.25*10^26 photons/sec

physics
a vending machine ate another students dollar. the student had enough. he dropped the vending machine off a 20 m cliff. at the same time his buddy at the bottom of the cliff throws a grenade straight up towards the vending machine. the grenade strikes the vending machine after...

phyicis
a vending machine ate another students dollar. the student had enough. he dropped the vending machine off a 20 m cliff. at the same time his buddy at the bottom of the cliff throws a grenade straight up towards the vending machine. the grenade strikes the vending machine after...

chemistry
It would be higher than the true value

Chemistry
Oh ok I thought I had to divide by the molecular weight of CaCO3 to find the moles of CO3. So I take the 0.54g CO3 and divide that by 60.01g which gives me 0.009 mol CO3 in 0.009 mol CaCO3?

Chemistry
I have 0.009 moles of CaCO3 and I needed to find how many moles of CO3 are in the CaCO3. I am just making sure I am doing this correctly. 0.009 mol CaCO3 x 60.01/100.09= 0.54g CO3 0.54g CO3/ 100.09g CaCO3 = 0.005 mol CO3

phyicis
Homer Hickham and his buddies launched model rockets in the late 1950's when the US was trying to get a rocket into space. If homer launches a rocket from rest and its engine delivers a constance acceleration of 8.2 m/s^2 for 5.0seconds after which the fuel is used up by ...

phyicis
After cruising at 75 mph down I-80 for 15 minutes on a roach trip, you hit traffic and travel at 15m/s for 15 minutes for the rest of trip. your average speed is 24.26 m/s. What if you were traveling at each speed for the same distance instead of time? What would your average ...

Social studies
how does geography affect the development of a civilization?

Math
the end point of a line segment is (-3,7) and the midpoint is (1-1) find the other endpoint

Let W1 represent the work required to accelerate an object on a frictionless horizontal surface from rest to a speed of v. if W2 represents the work required to accelerate the same object on the same surface from a speed of v to 2v, then which one of the following is the ...

chemistry
calculate the relativistic mass of 1.81x10^24 photons (3.00 mol) with wavelength of 450 nm.

Chemistry
I know, I don't understand. I don't know violet light or red light either, we haven't learned mass of those.

math
y=(w-5)270 for w

physics
A 5.20 package slides 1.57 down a long ramp that is inclined at 13.0 below the horizontal. The coefficient of kinetic friction between the package and the ramp is = 0.305 Calculate the work done on the package by friction. Calculate the work done on the package by gravity. ...

physics
A 5.20 package slides 1.57 down a long ramp that is inclined at 13.0 below the horizontal. The coefficient of kinetic friction between the package and the ramp is = 0.305 Calculate the work done on the package by friction. Calculate the work done on the package by gravity. ...

Precalc
how do I graph this function? x^2-xy+2x-1=0

science
On Earth, the ratio of the force (newtons) to the mass (kilograms) of an object is always the same

definition
CORRECT!!!! Somehow... i never thought of that word!!! thank u!

definition
what is a word that you don't choose when making a choice?

Earth Science
Does energy flows through the Earth's system by heat?

Earth Science
Can someone five me an example of how carbon cycles through the Earth's system?

Math - LCD
What is the LCD for x^2,x, and x?

math
is it true that you only have to check your solution in a rational equation if the solution is 0?

Algebra
All i know is the answer is 122.2%, i don't know what kind of problem this is or how to solve it haha

AP Chemistry
For the reaction ? Al + ? CuSO4 ↽⇀? Al2(SO4)3+? Cu a maximum of how many moles of Al2(SO4)3 could be formed from 5.95 mol of Al and 1.31 mol of CuSO4? Answer in units of mol.

AP Chemistry
For the reaction ? C6H6 + ? O2 ↽⇀? CO2 + ? H2O a maximum of ? moles of CO2 could be formed from 9 mol of C6H6 and 2.81 mol of O2. Answer in units of mol

AP Chemistry
So is it 1655.84?

AP Chemistry
What volume of 3.16 M HNO3 is required to prepare 524 mL of a 0.2 M HNO3 solution? Answer in units of mL.

AP Chemistry
How many grams of sucrose (C12H22O11) must be dissolved in 60 g water to make a solution in which the mole fraction of sucrose is 0.4? Answer in units of g.

Science
Which of the following is an organic molecule? A. Oxygen gas B. Sucrose C. Iron oxide D. Water

physics
A ping pong ball is rolling across a table top at 22 m/s. If it is 71 m away from the edge, how much acceleration does a person blowing on it need to apply to stop it from falling if they blow for 8.7 seconds?

physics
A ping pong ball is rolling across a table top at 22 m/s. If it is 71 m away from the edge, how much acceleration does a person blowing on it need to apply to stop it from falling if they blow for 8.7 seconds?

physics
202.8

Math
What is the smallest number with digits to the thousandths place that will round to 34.6?

Stats
Suppose X & Y are two independent stocks' returns with: E(X) = E(Y) =15% and V(X) = 144, V(Y) = 256 Problem 1. Buy half X and half Y, so w1 = w2 = 0.5 and Z = (X+Y)/2 Note: The answer says that the variance is 100 but I thought it would be 200. Since I would be adding half...

science
what is the density of liquid in a baloon that weighs 20N on a spring scale if the baloon has a volume of 0.75L what is the liquid density g/ml

Physics
Two 125 N forces pull on a 50 kg mass. One of the forces pulls to the right and the other pulls 90 degrees from the first force. What is the net acceleration of the mass?

Chemistry
oh I'm sorry it's a typo The question is this: Calculate the molality of a 0.410 molar aqueous glucose solution whose density is 1.15 g/mol

Chemistry
Calculate the molality of of a sol'n whose density is 1.15 g/ml

Algebra
48m^6

science
bromine and mercury are the only 2 liquids on the periodic table, could you predict this? why or why not?

econ
Suppose there are 1000 identical firms producing diamonds. Diamond miners receive the wage rate w. Assume that the short-run cost function for each diamond-producing firm is C(q) = wq + q2. a. If w = 10, what is the supply curve of an individual firm? What is the market supply...

Math
I am stuck with this logic problem: Logic – Jack of All Trades Trudy loves learning new things and is always taking some course or other forum the local college’s adult education program. She’s signed up for four upcoming classes – calligraphy, picture ...

Math
I am stuck with this logic problem: Logic – Jack of All Trades Trudy loves learning new things and is always taking some course or other forum the local college’s adult education program. She’s signed up for four upcoming classes – calligraphy, picture ...

Why?

Should only those who are trained lawyers allowed to be arbitrators for labor disputes?

math
339.97 x 48= 16318.56 16318.56+ 3260= 19578.56

Computer
How can I find information to develop an Excel spreadsheet using conclusions from my research about mulimedia tools that aid classroom instruction?

physics
Two identical diverging lenses are separated by 15 cm. The focal length of each lens is -8.0 cm. An object is located 4.0 cm to the left of the lens that is on the left. Determine the final image distance relative to the lens on the right.

geometry
determine the values of x and y for which ABCD is a parallelogram. AB = 3x + 7, BC = y +8, CD = 5x + 1, DA = 2y - 3

geometry
classify a triangle with side lengths 5, 9 and 12 as acute, right, or obtuse

geometry
ABCD is a trapezoid with median EF and bases AB and CD. AB = 18, EF = 28. Find CD

math
what is the inverse of: f(x) = 2(x – 4)^2 + 5

Math
This is how the question looks on the sheet?

Math
A rabbit population satisfies the logistic equation dy dt = 2x10^-7y(10^6- y); where t is the time measured in months. The population is suddenly reduced to 40% of its steady state size by myxamatosis. If the myxamatosis then has no further effeect, how large is the population...

Problem Solving
A 4oz jar of spice costs 92 cents. What is the unit cost per ounce.

writting out clock time
How do I write 1 minute 45.9 seconds? Is it 1:45.9 or is that one hour 45.9 seconds?

math
Records from buzz's sawmill show that workers have a 0.02 probability of losing an arm and a 0.03 probability of losing a leg in a year. What is the probability that a worker does not lose an arm? What is the probability that worker does not lose and arm or leg?

math
What is the number of ways 9 people from a group of 13 could be arranged in a line.

MATH
The probability that a voting-age adult in 2004 voted in the presidential election was 0.57. Five voting-age adults in 2004 were randomly selected. Find the probability that exactly 2 or the 5 adults voted in the presidential election.

statistics
11 are from Atlantis and 5 are from Zedonia

statistics
A group meeting is attended by 16 delegates. (a)If a 6-person negotiation panel is selected at random from the 16 delegates, what is the probability the negotiation panel consists of 3 delegates from Atlantis and 3 delegates from Zedonia?

physics
i am also stumped on this question The bounce periods y are measured for a set of masses x hung from a spring. Assuming the exponential form y = bx m, (log y) vs. (log x) is plotted, yielding a linear trendline equation of (log y) = 0.4796 (log x) + 0.1029, with R2 = 0.9991. ...

physics
A 2630-kg car drives up a hill 769 meters high in 41.0 seconds. Calculate the power exerted

bio
what do macrophages have to do with coplement proteins

english

english
(forth) is italicized

english
thank you and i have something different now: What part of speech is the italicized word in the sentence below? Four score and seven years ago, our forefathers brought forth upon this continent a new nation conceived in liberty and dedicated to the proposition that all men are...

english
so its complex??

english
is this a compound or complex sentence: They were lovely people, the kind you might meet anywhere.

Statistics
A large furniture store has begun a new ad campaign on local television. Before the campaign, the long term average daily sales were \$24,819. A random sample of 40 days during the new ad campaign gave a sample mean daily sale of x(bar)=\$25,910 with sample standard deviation s...

english

english
i have one more :The hero falls in love with a countess (who is very beautiful).

english
its past participial phrase

english
i think it could be: Headed by a senior,

english
so it would be nominative absolute??

english
senior

english
or prepositional phrase with a gerund

english
thank you and what about this one:Headed by a senior, the group drew up rules for School Spirit Week. i think its nominative absolute??

english
please help me!!!! Put the sizes on the uniforms while sorting them out. and the italicized is sorting them out,can only be: adverb clause infinitive phrase past participial phrase elliptical clause adjective clause

english

chemistry
The half life of phosphorus -32 is 14.3 days. What percentage of an original samples radioactivity remains after 57.2 days?

biology
What reactions go on in your brain when you fall asleep? If you could give me a website that goes INDEPTH as to what happens in the brain when you fall asleep that would be great!

statistics
The international olympic committe states that the female participation in the 2004 summer olympic games was 42%, even with new sports such as weight lifting, hammer throw, and modern pentathalon being added to the games. Broadcasting and clothing companies want to change ...

math
For the geometric series 50+48+... a. 867.373 is the approximate value of a partial sum of the series. How many terms were added to get this number? b. To what number does the serveries converge?

APUSH PLZ HELP!
In 1850 the South was in good political shape. Each of the following descriptions explains why that was true except? A. Zachary Taylor, the president, was a southern slave-owner B. The majority of the presidential cabinet were southerners C. Most of the justices on the US ...

APUSH
In 1850 the South was in good political shape. Each of the following descriptions explains why that was true except? A. Zachary Taylor, the president, was a southern slave-owner B. The majority of the presidential cabinet were southerners C. Most of the justices on the US ...

science
How do you think objects will fall when there is no air