Wednesday

September 28, 2016
Total # Posts: 229

**chemistry**

If the heat of combustion for a specific compound is -1310.0 kJ/mol and its molar mass is 75.45 g/mol, how many grams of this compound must you burn to release 708.60 kJ of heat?

*October 21, 2012*

**chemistry**

A 1.00 g sample of naphthalene (C10H8) contains 0.562 g of hydrogen. What is the mass percent of carbon in the compound

*October 10, 2012*

**Science**

umm it will be ionized because electrons have a bit of both sum positive and some negative and so kind of like neutrally ionized but i am not sure so like about 52%

*October 9, 2012*

**Math**

Ms. Sue or Steve can explain more.

*October 6, 2012*

**Math**

because 7 ran both times.

*October 6, 2012*

**physics**

A football is thrown directly toward a receiver with an initial speed of 15.8 m/s at an angle of 17Â° above the horizontal. At that instant, the receiver is 18 m from the quarterback. In what direction and with what constant speed should the receiver run to catch ...

*October 1, 2012*

**6th grade math**

thanks

*September 14, 2012*

**6th grade math**

the first word in the question is identify not entify

*September 14, 2012*

**6th grade math **

entify if the problem shown below is an example of the commutative, associate or distributive property. Explain your answer. (2 + a) + 7 = 2 + (a + 7) thanks

*September 14, 2012*

**Algebra..**

help? Give the slope and y-intercept of the given line and then graph it. 8. 2x-3y=6 9. y=-2x 10. y=3 11. x+2=0

*September 14, 2012*

**math**

Thanks!

*September 14, 2012*

**math**

Francis ate 2/3 of a large pizza. Janette ate 1/4 of the same pizza. How much pizza did Francis and Janette eat in all?

*September 14, 2012*

**Math**

my answers 1. a 2. c 3. d 4. b

*September 13, 2012*

**Math **

1. What is the product of (5.1 x 10^3) x (3.2 x 10^3)? a. 16.32 x 10^6 b. 1.632 x 10^7 c. 16.32 x 10^9 d. 1.632 x 101^0 2. What is the product of (7.28 x 10^-2) x (9.1 x 10^-2)? a. 6.6248 x 10^-3 b. 66.248 x 10^-4 c. 6.6248 x 10^4 d. 66.248 x 10^-3 3. What is the quotient of (...

*September 13, 2012*

**Lang. Arts**

no b

*September 13, 2012*

**math help**

1. Which of the following is greater than 4.3 x 10^9 a. 2.1 x 10^9 b. 3.2 x 10^9 c. 5.3 x 10^9 d. 7.4 x 10^8 2. Which of the following is less than 6.5 x 10^-5 a. 1.4 x 10^-3 b. 2.5 x 10^-4 c. 7.8 x 10^-5 d. 4.6 x 10^-6 3. According to the 2010 census, the population of ...

*September 12, 2012*

**math help**

1. Which of the following is greater than 4.3 x 10^9 a. 2.1 x 10^9 b. 3.2 x 10^9 c. 5.3 x 10^9 d. 7.4 x 10^8 2. Which of the following is less than 6.5 x 10^-5 a. 1.4 x 10^-3 b. 2.5 x 10^-4 c. 7.8 x 10^-5 d. 4.6 x 10^-6 3. According to the 2010 census, the population of ...

*September 12, 2012*

**20**

Cool!

*September 12, 2012*

**20**

What language is that?

*September 12, 2012*

**English**

thank you so much

*September 12, 2012*

**English**

2. d 3. a c. c

*September 12, 2012*

**English**

On number two the word was suppose to be sauntered

*September 12, 2012*

**English**

2. Read the following words: sautnterd, walked, danced What is the best way to group these words on a classification chart to help you understand their meanings? a. They all end in -ed b. They are all in the past tense c. They are all verbs d. They are all ways in which people...

*September 12, 2012*

**English 11**

In “Sinners in the Hands of an Angry God,” Edwards establishes various conclusions and then applies those conclusions to his congregation. What strategy does Edwards use to make the application of his conclusions seem very personal and relevant to his audience? (1 ...

*August 13, 2012*

**English 11**

Identify whether the underline pronoun is personal, intensive, or reflexive in questions 1–3. 1. In the early 1840s, adventurous settlers readied themselves for the overland trip to the West. (1 point) personal intensive reflexive 2. Life in the Oregon country held new ...

*August 13, 2012*

**math**

There are 2 cases: the 6 is rolled either on the 6 or 8 sided die. Therefore, we have ((1/6)(7/8))+((5/6)(1/8))=1/4.

*July 26, 2012*

**Physics**

A motorist traveling with a constant speed of 15m/s passes a school-crossing corner, where the speed limit is 10m/s. Just as the motorist passes, a police officer on a motorcycle at the corner starts off in pursuit with constant acceleration of 3m/s^2. (a)How much time elapses...

*June 29, 2012*

**Physics**

A motorist traveling with a constant speed of 15m/s passes a school-crossing corner, where the speed limit is 10m/s. Just as the motorist passes, a police officer on a motorcycle at the corner starts off in pursuit with constant acceleration of 3m/s^2. (a)How much time elapses...

*June 29, 2012*

**Physics**

Thank you. I got now the answer. :)

*June 22, 2012*

**Physics**

A jogger runs 145m. in a direction 20.0 degrees east of north (displacement of vector A) and then 105m. in a direction 35.0 degrees south of east (displacement of vector B). Using components, determine the magnitude and direction of the resultant vector C for these two ...

*June 22, 2012*

**math**

(-(4 to the 6)) divided by (-(4 to the 3)) = 64

*May 30, 2012*

**pre algebra help**

Well what info do you have? You have the height and volume. What formula does those fit into? V = (1/3) (pi) (r^2) (h) AKA Volume = 1/3 pi r squared multiplied by height SO. Plug in your numbers, 92.4 = 1/3 (pi) (r^2) 10 Now you want diameter, so r x 2 works as well since ...

*May 30, 2012*

**Introduction to Psychology**

short-term memory loss. :D

*May 30, 2012*

**Related rates**

i'm sorry, this is about optimization problems.

*May 20, 2012*

**Related rates**

A piece of wire 10 feet long is cut into two pieces. One piece is bent into the shape of a circle and the other into the shape of the square. How should the wire be cut so that the combined area of the two figures is as small as possible?

*May 20, 2012*

**related rates**

After blast-off, a space shuttle climbs vertically and a radar-tracking dish, located 1000 meters from the launch pad, follows the shuttle. How fast is the radar dish revolving 10 sec after blast-off if at that time the velocity of the shuttle is 100 m/sec and the shuttle is ...

*May 20, 2012*

**calculus**

thanks a lot!

*May 20, 2012*

**calculus**

Find the dimensions of a rectangle with perimeter 100m. whose area is as large as possible.

*May 20, 2012*

**calculus**

thanks guys!

*May 20, 2012*

**calculus**

i hope i got it right. The two numbers are 10 and 10?

*May 20, 2012*

**calculus**

Find two positive numbers whose product is 100 and whose sum is a minimum.

*May 20, 2012*

**calculus**

limit of ln(sin x) as x approaches pi to the left

*May 20, 2012*

**calculus**

The sum of two positive numbers is 100. Let one of the numbers be x and express the product P of the two numbers as a function of x.

*May 20, 2012*

**calculus**

thank you so much. :)

*May 20, 2012*

**calculus**

A rectangle has a perimeter of 10 meters. Express the area A of the rectangle as function of the width x.

*May 20, 2012*

**relaited rates**

thank you. :) you really did a big help. Godbless

*May 15, 2012*

**relaited rates**

uhm, just one more thing. Isn't it 5/144π ? :)

*May 15, 2012*

**relaited rates**

thank you so much! :)

*May 15, 2012*

**relaited rates**

A spherical balloon is being inflated so that its volume is increasing at the rate of 5 cubic meter per minute.At what rate is the radius increasing when the radius is 6 meters?

*May 15, 2012*

**Related rates**

thank you so much. :) you really help me a lot. Godbless!

*May 14, 2012*

**Related rates**

I'm very thankful for being kind to me. Last one thing, 8 meters is the height of the conical pile. Does it also mean that it is the same as the height of the sand?

*May 14, 2012*

**Related rates**

Thank you for answering my question. I just can't understand how it come up to the equation 10=2Π(64)dr/dt. I will be very thankful if you elaborate. :)

*May 14, 2012*

**Related rates**

Sand is being dropped at the rate of 10 cubic meter per minute onto a conical pile. If the height of the pile is always twice the base radius, at what rate is the height increasing when the pile is 8 meters high?

*May 14, 2012*

**6th Grade Christian History**

Elsa, its for help, not cheating. People ask for Ms. Sue or someone else to check their answers. That's that.

*March 10, 2012*

**english 11**

DBDBD. Just took the same quiz.

*March 9, 2012*

**6th Grade History**

i think your right with that answer

*March 5, 2012*

**Trigonometry**

Find the angle of elevation of the sun when a tree that is 10 yd tall cast a shadow 14 yds long

*March 5, 2012*

**Trigonometry**

A lookout spots a fire from a 36 meter tower the angel of depression from the tower to the fire is 21 degrees . To the nearest meter how far is the fire from the base of the tower

*March 5, 2012*

**Trigonometry**

an airplane over the pacific sights an atoll at a 11 degrees angel angle of depression. if the plane is 410 m above water how many kilometers is it from a point 410 m above the atoll

*March 5, 2012*

**Trigonometry**

a 30 feet ladder resting against a building makes a 60 angle with the ground . find the Height from the ground at which the ladder touches the building to the nearest foot

*March 5, 2012*

**Trigonometry**

Liola drives 13 km up a hill that is at a grade of 10 Degrees what horizontal distance to the nearest tenth of kilometer has she covered

*March 5, 2012*

**Trigonometry**

A side 2.8m long makes an angle of 25 degrees with the ground how high is the top of the slide above the ground .

*March 5, 2012*

**gemotry**

On a sunny day object A has a shadow of length 3 meters and a meter stick has a shadow 1.5 meters while object b has a shadow of length 6 meters how tall is object A AND B

*March 5, 2012*

**geometry**

Marc is visiting washington dc he wants to know the height of the washington monument the length of the monument shadow is 111 feet long at the same time that marcs shadow is 1 foot long Marc is 5 feet tall using this data find the height of the monument

*March 5, 2012*

**Medical Coding 2**

FINAL TAKE 882.0 890.0 881.0 12042 12004 E000.8 E001.1 E849.0 E888.0 E920.9

*February 8, 2012*

**Medical Coding 2**

FOR 2ND CPT 12002 CPT 12004

*February 8, 2012*

**Medical Coding 2**

for 2nd E001.1 E849.0 E888.0 E920.9

*February 8, 2012*

**Calculus (Parts A and B done, just help with C)**

Given: dr/dt = 0.05 m/s V = 4/3 πr³ dV/dt = 4πr² (dr/dt) A = 4πr² dA/dt = 8πr (dr/dt) - - - - - - - - - - - - - - - First question: What is dV/dt when r = 12? dV/dt = 4π(12 m)² (0.05 m/s) dV/dt = 28.8π m³/s dV/dt ≈ ...

*January 17, 2012*

**Calculus (Parts A and B done, just help with C)**

dr/dt = .05 v = (4/3)pi r^3 dv/dt = (4/3)pi(3) r ^2 (dr/dt) <---- this step is where the mistake was. you needed to have differentiated the volume with respect to time. to do this use the power rule on the right side. the derivative of (4/3)pi r^3 is (4/3)pi(3) r ^2 (dr/dt...

*January 17, 2012*

**Calculus ~ Related Rates**

-10/3

*January 5, 2012*

**Calculus**

Okay, letting x be height and b radius of smaller, then x/b=h/r, and volumeof smaller is 1/3pi(h-x)b^2, or 1/3pi(h-x)(x^2r^2/h^2= 1/3pi((x^2r^2/h)-(x^3r^2/h^2). Now differinate with respect to x, and set to 0, so ((2xr^2/h)-(3x^2r^2/h^2)=0, so you get x=2/3h. So, fraction is...

*December 16, 2011*

**Chemistry**

How many grams of CO are needed to react with an excess of Fe2O3 to produce 233.4 gFe? Fe2O3 (s) + 3CO (g) --> 3CO2 (g) + 2Fe (s)

*December 11, 2011*

**Chemistry **

If 26.4 L of H2 reacted with 13.2 L of O2 at STP, what is the volume of the gaseous water collected assuming that none of it condenses?

*December 11, 2011*

**geometry**

the ratio of the area of a smaller triangle to the area of a larger triangle is 1:4. if the are of the smaller triangle is 30, find the area of the larger triangle.

*November 8, 2011*

**MATH**

4*3*2*1*3 there are 4 possibilities for the first space... so u only have 3 options for the fifth spot because 1 car has already parked... now since two cars have parked in the first and last spots you have 3 cars out of the five that can still park.. so 3 can park in the ...

*July 27, 2011*

**english**

A. communist B. guerillas C. Marxist

*June 10, 2011*

**English-cry the beloved country**

An example I believe is for those who love and don’t seek power would be James Jarvis. Rather than seeking power he goes on and helps the villagers, at first he begins with donating ilk but then his rating with help goes higher and higher, not to mention the amount of ...

*May 2, 2011*

**math**

Thanks helped a lot

*April 8, 2011*

**math**

_ _ < 50 12 and 24 It's mental math.

*March 28, 2011*

**physics**

A 0.46 kg object connected to a light spring with a spring constant of 18.0 N/m oscillates on a frictionless horizontal surface. The spring is compressed 4.0 cm and released from rest. (a) Determine the maximum speed of the mass. unit = cm/s (b) Determine the speed of the mass...

*March 22, 2011*

**Science**

How do you reverse the expirement of a Iron Nail which is placed into a cup of Copper Sulfate????

*March 17, 2011*

**Physics**

1 Hz

*March 14, 2011*

**HiSTORY ....helpppppp **

YEllow journalism was important because it was a business move for the newspapers. By makiing the war more exaggerated in the media, it sold more newspapaers.

*March 13, 2011*

**physics**

Figure 6-43 shows a "conical pendulum", in which the bob (the small object at the lower end of the cord) moves in a horizontal circle at constant speed. (The cord sweeps out a cone as the bob rotates.) The bob has a mass of 0.060 kg, the string has length L = 0.90 m ...

*December 5, 2010*

**history**

Im on my school laptop and its not letting me get through to the links.

*October 25, 2010*

**history**

how do you think the Emancipation proclamation will affect people’s attitudes towards the war?

*October 25, 2010*

**1st grade**

a flip flop?

*October 6, 2010*

**Physics**

HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHHAHHAHAHA

*October 6, 2010*

**Grade 9 science: ecology**

They share cellular respiration but dint share photosynthesis

*September 20, 2010*

**algebra**

find algebraically the equation of the axis of symmetry and the coordinates of the vertex of the parabola whose equation is y=-2x^2-8x+3. explain the steps please. :)

*June 4, 2010*

**algebra**

(1) x^2 (2) x^9 (3) 4x^2 (4) 4x^9

*June 3, 2010*

**algebra**

in simplest form?

*June 3, 2010*

**algebra**

what expression represents (2x^3)(8x^5)/4x^6?

*June 3, 2010*

**science!!**

The element in an incandescent light bulb that releases light energy is _____. I think its C a thin tungsten filament. Am i right? below are the choices: A.a phosphor B.mercury vapor C.a thin tungsten filament D.a thick tungsten filament

*June 2, 2010*

**math**

I think its 63 miles per hour. How i got it: 12 hrs. minus 7 hrs. = 5hrs for the return trip. 45*7= r*5 315==r*5 315/5 = 63 miles per hour (i think that 63 is the answer. im not sure)

*May 31, 2010*

**science**

Hi it's me again. I realize that my last question didn't make much sense, so I will try to explain it again. Her it goes..... A long time ago the Mayans predicted that it took so many days( years even) for the sun to orbit the jupiter. This was without any sort of ...

*April 12, 2010*

**science**

I remember hearing something about how the Mayans predicted that it took so many days for the sun to orbit the sun and then Nasa recently figure out that they were only slightly off. Does anyone know about this? Thanks

*April 12, 2010*

**PLZ HELP!!!! communication**

THE ANSWER IS; False of course! :) Selective listening DOES focus on the most important parts of a message, but it isn't always effective!

*April 4, 2010*

**home economics**

macro nutrients = protiens,fat micro nutrients =minerals & vitamins

*January 14, 2010*