Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 429

**chemistry**

6.022 x 1023 atoms. Thank you Dr Bob222

**chemistry**

How many atoms are in 95.96 g of molybdenum (Mo)

**Physics!**

The following four forces act on 4.00 kg object: F1 = 300 N east F2 = 700 N north F3 = 500 N west F4 = 600 N south What is the acceleration of the object?

**Physics**

A 1000-kg car is driving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to a rest in a distance of 140 m. What is the constant force applied to the car to bring it to rest?

**math**

What Is the ture math relationship using the numbers 1,1,1,10,7,8 ,5 to make it 1 or equal to one in fractions?

**Pre-Algebra**

suppose the projector is moved to a point 9 ft from the screen. what size will the picture be (width, height, and area) please help

**Home Insurance**

its D

**Math/Calculus**

After 5 days, a particular radioactive substance decays to 37% of its original amount. Find the half life of this substance. Is this right? Th= ln 2/ln(1/.37) x 5 days

**Accounting**

I have added Below my balance sheet and income statement now the statement of owners equity is the beginning capital 28,2800 plus the net income 21,550 which is 49,750 less withdrawals 5,000 equals 44,750 which does not equal my assets. I cannot figure out what I am doing wron...

**Accounting**

Sorry about that I have added Below are my balance sheet and income statement now the statment of owners equity is the beginig capital 28,2800 plus the net income 21,550 which is 49,750 less withdrawls 5,000 equals 44,750 which does not equal my assets. I cannot figure out wha...

**Accounting**

Statement of Owner's Equity I've tried to get it to balnce with the amount of on my balance sheet of $54,500.00 but can not can you help Cash… …… ……… … … … ………$21,500 Accounts Receivable………17,50...

**help please :-)**

Could be both a and B

**help please :-)**

its the supporting details

**math**

solve. (3k+4.2)+8.6 and (3s)x8

**Science economic**

Cesium 138 has a half life equal to 32.2 minutes. how long will it take for 2/4 of this sample to decay

**vocab**

i need hel because i dont know how to use indignation in a sentence and it make sense!

**math**

2. Simplify. Please be sure to show all of your work. -3(-9) – |-5 – 3 3. Simplify. Please show all of your work 9c^3+7c-(3c^3-12+c) 4. Solve 4x- 3(5x-8) =23-9(x+2) . Please show all of your work 5. Solve the following equation for z. Please show all of your work. x...

**math**

Solve. Please show all of your work. Find the length and width of a rectangular lot with a perimeter of 108 meters if the length is 8 meters more than the width.

**math**

Solve 4x- 3(5x-8)=23-9(x+2) . Please show all of your work

**math**

Simplify. Please show all of your work 9c^3+7c-(3c^3-12+c)

**math**

Simplify. Please be sure to show all of your work. -3(-9) – |-5 – 3|

**math**

Simplify. Please show all of your work. 12* 1/4 +2/-2^3

**math**

Write the slope-intercept equation for the line with the given slope that contains the given point m = 3/4 ; (0, 5)

**math**

Write a slope-intercept equation of the line whose graph is described Parallel to the graph of 3x + 2y = 5; y-intercept (0, −1)

**math**

Four-year -college tuition. The average tuition at a public four-year college was $3983 in 2001 and $5948 in 2005. Find the rate at which tuition was increasing.

**math**

Determine if(3/8-1 is a solution to 8x-7y=10. Please show all of your work

**math**

4. Translate to an equation: p $25 potted plants and s $20 shrubs total $300 Graph the equation and use the graph to determine three different combinations of potted plants and shrubs that total $300. Submit your graph through the dropbox.

**Math**

Find the x- and y-intercepts and graph the equation plotting the intercepts. Please show all of your work. Submit your graph to the Dropbox 2x-3y=9

**math**

(8/3-1) is a solution to 8x-7y=10 . Please show all of your work

**algebra**

Can you sketch the y=x+9 equation?

**maths**

Starting from one oasis, a camel walks 25km in a direction 30 degrees south of west and then walks 30km toward the north to a second oasis. What distance separates the two oases?

**english**

What correction should be made to this sentence? Today's hikers prefer a shoe that is six inches high, is made of leather, and thick sturdy composition soles.

**algebra 1**

determine whether the graphs will be parallel,perpendicular, or neither...... y=2/3x-6 2x-4=3y

**Science**

What are the theoretical molar ratio values for Ag:Cu and Ag:AgNO3? Compare these values to the values you got in your experiment and compute a percent error for your work.

**Math**

If two number cubes are rolled, what is the probability of getting at least one even number?

**MATH**

In the equation 4*ABCDE= EDCBA each letter represents a different nonzero digit. Determines the sum A+B+C+D+E i don't know how to do this

**Math**

Given a+b+c+d=45 and a+2=b-2=2c=d/2 compute a+b+c-d

**healthcare**

What effect will the current governmental initiatives that focus on expanding health care coverage to more Americans have on health care costs and health care services in the United States? What would you add or subtract from the recently approved healthcare bill?

**government**

Younger Citizens

**precalc**

dont know how to find the derivitive

**precalc**

find an equation of the tangent line to the parabola at the given point..show work y=(-2)x^2 (-1,-2)

**physics**

Why does a gas become hotter when compressed by a piston in a cylinder?

**calculus**

can you please help me solve this problem if dy/dx=ycosx and y=3 when x=0, then y=

**calculus**

if dy/dt=-3y and if y=1 when t=0, what is the value of t for which y=1/3?

**calculus**

is the answer to find an equation of the curve that passes through the point (1,1) and whose slope at (x,y) is y^2/x^3 is y=2x^2-1

**physics**

1.) A small sphere of charge 2.4 μC experience a force of 0.36 N when a second sphere of unknown charge is placed 5.5 cm from it. What is the charge of the second sphere? 2.) Two identically charged sphere placed 12 cm apart have an electric force of0.28 N between them. W...

**precalc**

Find the vector v with the given magnitude and the same direction as u. ||v||=7, u=3i+4j

**reading**

In 1984 by George Orwell, what do the 3 slogans (war is peace, ignorance is strength, freedom is slavery) mean? I would like to know what EACH suggests about the society. And how is the society able to get people to accept them as logical. I was thinking that they chose contra...

**PHYSICS**

A 70 kg student traveling in a car with a constant velocity has a kinetic energy of 1.4 104 J. What is the speedometer reading of the car in km/h?

**Maths - Calculus **

Can anyone help with this...I need to find the derivative of the functions below. If possible please show working so I can try and understand? f(t) =3-t^4 and g(t)=sin(4t) Then using the Quotient Rule differentiate the function k(t) 3-t^4/ sin(4t) (0<t< pie)

**Maths - Calculus **

Can anyone help with this...I need to find the derivative of the functions below. If possible please show working so I can try and understand? f(t) =3-t^4 and g(t)=sin(4t) Then using the Quotient Rule differentiate the function k(t) 3-t^4/ sin(4t) (0<t< pie)

**Physics**

Hey, I thought about it a little more and I have your answer here. B = mu(naught) * I / (2pi * r) You can solve for I in that equation. I hope it looks familiar. mu(naught) = vacuum permeability I = current r = radius of wire

**Physics**

I won't be able to answer exactly, but we know that the net force on the wire would be zero. So it means that Force(gravity) = Force(magnetic)

**English**

What is a characteristic to describe a person who always follows a schedule? What is a characteristic to describe someone who always follows the law?

**English**

What is a characteristic to describe a person who always follows a schedule?What is a characteristic to describe someone who always follows the law?

**geometry**

I have a perimeter of 15. I am not a square . Each of my sides is 3 units long. What shape am i?

**chemistry**

how long will it take to decompose 38% of A at 25 degrees celsius?

**Physics**

The gravitational potential difference between the surface of a planet and a point P, 10 m above the surface, is 8.0 J kg-1. Assuming a uniform field, what is the value of the gravitational field strength in the region between the planet’s surface and P?

**Physics**

Two objects of equal mass m are separated by a distance r. Which expression gives the gravitational potential at the point P mid way between the two objects? The answer shows as -4Gm/r, but I can't see where this comes from.

**Physics**

A block weighing 6.8 N requires a force of 2.5 N to push it along at constant velocity. What is the coeﬃcient of friction for the surface? A weight W is now placed on the block and 4.6 N is needed to push them both at constant velocity. What is the weight W of

**chem**

When an electric discharge is passed through boron trichloride a new compound is formed. what is its simplest formula if on analysis it is shown to contain .0878 g of chlorine and .0131 g of boron?

**chem**

a 6.54 g sample consisting of a mixture of silver nitrate and sodium nitrate is dissolved in water. this mixture then reacts with barium chloride to for 3.50 g of silver chloride. calculate the percent by mass of silver nitrate in the first mixture

**physics**

9 m/s2

**chemistry**

What would happen if 50 grams of carbon fully reacted to oxygen?

**Chemistry**

how do you do this problem?!

**Stats**

A car insurance company has determined that 7% of all drivers were involved in a car accident last year. The company randomly selects 200 drivers. Compute the mean and standard devistion of the random variable, x, the number of drivers involved in accidents last year.

**physics**

S=u^2/2µs(g) S=(20.1168m/s)^2/2*.602*9.8 S=34.298m

**physics**

45 mi/h = 20.1168 m/s ma= .100n a = .100(g) solving for time v=vo + at 20.1168m/s=0+.98(t) t=20.527s solving for distance d=do+vot+at^2/2 d= 0+0+.98(20.527s)^2/2 d= 206.469m

**chemistry**

Cu + 2AgNO3-->Cu(NO3)2+ 2Ag 3.50/2 <--3.50

**English---meaning??**

"Submit a myth, or story, whose origins stem from your specific culture." what does specific culture mean??? For that requirement, what do I have to do???

**trig**

Find the values of the trigonmeric functions of t from the given information cos t = -4/5 terminal point of t is in quadrant III

**chem--please help me check my answer!!**

write an ionic and net ionic equation for the following reaction between Fe3+ and NH4OH. Please check my answer!! Thank you. My answer is: ionic: Fe3+(aq) + NH4OH--> Fe(OH)3 + NH4+ net ionic: Fe3+ +OH- -->Fe(OH)3

**chemistry**

Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 Using the above table, determine the final temperature if 713.6J is released from a 48.2g sample of copper initially at 93.8o C. i keep coming up withthe wrong ...

**Chemistry**

How do you work this one problem? Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 Using the above table, determine the final temperature if 713.6J is released from a 48.2g sample of copper initially at 93.8o C.

**CHEMISTRY**

really really need help w/this problem I think i figured it out but i have to be sure i did it right in order to do others similar to it please help thanks Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A p...

**chemistry **

I really really need help w/this problem I think i figured it out but i have to be sure i did it right in order to do others similar to it please help thanks Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A ...

**Chemistry**

Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A piece of metal at a temp of 95.0oC and a mass of 67.0 g is dropped into a beaker of water containing 100 g at a temp. of 30.0oC. If the final temperature reac...

**Physics**

An object with a mass of 2.728x10^1 kg is subjected to a force of 1.31851x10^3 N directed at an angle of 1.056x10^1 degrees from the x axis. A second force of 1.93826x10^3 N acting in the negative Y directions is also applied to the object. To two significant figures what is t...

**physics**

a kid goes down a slide, accelerating at 1 m/s^2 for 3 seconds. if he starts at rest, how long is the slide ? this is the equation i have but i need Xi which i have NO clue what it is .. Xf= Xi+ 0m/s(3s)+1/2 (1m/s^2)(3^2s) solving for Xf ... need Xi

**chemistry**

What volume (in Liters) of oxygen must react to form 17.0L of carbon dioxide according to the following balanced equation: 2CO(g) + O2(g) --> 2CO2(g) 17.0 L CO2 x (1 moles O2/2 moles CO2) = 17.0 x (1/2) = 8.5 L did i do this problem correctly

**college chemistry**

What volume (in Liters) of hydrogen must react to form 17.0L of ammonia according to the following balanced equation: N2(g) + 3H2(g) --> 2NH3(g) Assume an excess of N2 and that all are at the same temperature and pressure.

**Physics**

space shuttle travels at about 7.4581x10^3 m/s. An astronaut takes about 1.5933x10^2 ms to blink an eye. How far does the space shuttle travel in that time, expressed to 4 significant figures?

**Physics**

A plane travels with a uniform velocity of 3.399x10^1 m/s for a period of 2.267x10^0 seconds. What distance is travelled during this time, in meters

**stats**

Mean is 60 and standard deviation is 7. what percentage is 73 and below.

**Physics**

A person walks 2.8597x10^1 m East, then turns around and walks 8.7898x10^1 m West. The total time to walk this distance was 4.4004x10^2 s. What is the velocity of the walker, expressed to 3 significant figures? Note: Your answer is assumed to be reduced to the highest power po...

**Physics**

A person walks 2.8597x10^1 m East, then turns around and walks 8.7898x10^1 m West. The total time to walk this distance was 4.4004x10^2 s. What is the velocity of the walker, expressed to 3 significant figures? Note: Your answer is assumed to be reduced to the highest power po...

**physics**

A block of mass 39 kg lies on an inclined plane, as shown. The horizontal and vertical supports for the plane have lengths of 36 m and 15 m, respectively, and the coefficient of kinetic friction between the plane and the block is 0.3. The magnitude of the force ~F necessary to...

**physics**

i got the correct answer but i still get any of the concept >.< i feel dumb ahhh oh oh any good sites to learn physics really good

**physics**

A descending elevator of mass 670 kg is uniformly decelerated to rest over a distance of6 m by a cable in which the tension is 8683 N.The acceleration due to gravity is 9.8 m/s2.Calculate the speed vi of the elevator at the beginning of the 6 m descent. Answer in units of m/s.

**Physics**

A mining operation excavates 5.482x10^4 metric tonnes of ore each hour. In an 12 hour production shift, how much ore is excavated in kg, to 2 significant figures?

**Physics**

A refinery recieves 4.23434x10^4 m3/h of crude oil. After the distillation process roughly 4.76216x10^1 % of the crude is converted to miltitary aviation fuel (JP4). What is the amount of JP4 produced in a day in L, expressed to 4 significant figures?

**Chemistry**

ok so 8.0x10^4 = 80000 tons 80000 = 176 369 809.75 pound =80 000 000 001 grams m = vxd = 80000x1.03g/mg

**Chemistry**

consider a neutral atom with 69 protons and 80 neutrons what is the atomic number of this element

**Chemistry**

A dose of asprin of 5.0mg per kilogram of body weight has been perscribed to reduce the fever of an infant weighing 8.0 pounds. One pound is 453.59g. What is the number of milligrams of asprin that should be administered

**Chemistry**

a dose of asprin of 5.0mg per kilogram of body weight has been perscribed to reduce the fever of an infant weighing 8.0 pounds one pound is 453.59g what is the number of milligrams of asprin that should be administered

**Chemistry**

a nugget of gold with a mass of 437g is added to 50ml of water the water raised to a volume of 90.0 ml what is the density of the gold

**Chemistry**

when is it appropriate to use gravity filtration and when to use vaccume filtration

**Chemistry**

when is it appropriate to use gravity filtration and when to use vaccume filtration

**Chemistry**

where would the safest location on the bench to set up and use a labratory burner explain why

**Chemistry**

when an object was weightedon a top loading balance the balance display read 13.730 the mass was recorded as 13.73g what is wrong with that explain the answer

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