Friday

November 21, 2014

November 21, 2014

Total # Posts: 575

**Math**

What is 3.9 x 4.67 equal to?
*November 12, 2014*

**Physics**

Two objects are moving in the xy-plane. No external forces are acting on the objects. Object A has a mass of 3.2 kg and has a velocity of Va= (2.3 m/s)i + (4.2m/s)j and object B has a mass of 2.9 kg and has a velocity of Vb= (-1.8m/s)i + (2.7m/s)j. Some time later, object A is...
*November 12, 2014*

**Physics**

A mass of 2.0kg traveling at 3.0 m/s along a horizontal plane hits a relaxed spring 20cm away from it. The coefficient of kinetic friction is 0.3. The mass is slowed to zero velocity when the spring has been compressed. By how much the spring has been compressed, the spring ...
*November 9, 2014*

**Physics**

A mass of 2.0kg traveling at 3.0 m/s along a horizontal plane hits a relaxed spring 20cm away from it. The coefficient of kinetic friction is 0.3. The mass is slowed to zero velocity when the spring has been compressed. By how much the spring has been compressed, the spring ...
*November 5, 2014*

**Chemistry**

A concentration cell consists of two Sn/Sn2+ half-cells. The cell has a potential of 0.12V at 25 ∘C. What is the ratio of the Sn2+ concentrations in the two half-cells?
*November 3, 2014*

**English**

adjective
*November 3, 2014*

**Chemistry**

Hello. On the homework for my middle school chemistry class, one of the questions asks me to identify "the four classifications of substances". I am having difficulties with this problem.
*October 28, 2014*

**Math**

If the average cost per salaried employee increases by $4,000 in the Kitchen Department, what is the new average cost per employee in the department? (more info: Salaried Employees: Average # of employees: 2 Cost in Thousands: 52 Average Cost/Employee: 26 Hourly: Average # of...
*October 27, 2014*

**Math**

estimate the area of the rectangles 5 7/9 by 3 1/5 7 7/8 by 1 1/3 Estimate each product. 3/8 X 4
*October 16, 2014*

**Math **

A rancher with 750ft of fencing wants to enclose a large rectangle area and then divide it into four equal-sized pens to hold animals. If the maximum area is desired to ensure humane treatment of the anima, what should be the dimensions of the larger rectangle. What should be ...
*October 12, 2014*

**Financial Mathematics**

The Z Corporation needs $180,000 in 60 months. If they deposit $2,000 per month for the first 20 months, $2,500 for the next 20 months, and $2,000 + R for the last 20 months, what is R if they can invest at 7%(12)?
*October 2, 2014*

**Language arts**

At the end of her aunts story in the story teller the older girl asked whether the girl in the story would have been rescued even if she had not been good. what does she seem to think is the theme of her aunts story
*September 26, 2014*

**Social Studies (SS)**

What was the relationship between the popularity of rice in Europe and slavery in the Southern colonies?
*September 18, 2014*

**physics**

A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 57.3° above the horizontal. The rocket is fired toward an 11.0 m high wall, which is located 21.5 m away. By how much does the rocket clear the top of the wall?
*September 14, 2014*

**Science**

Thank You so much DrBob222!
*September 8, 2014*

**Science**

Does Earth rotate or orbit each day?
*September 8, 2014*

**AP Physics **

A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 16.5 m long. The bowler hears the sound of the ball hitting the pins 2.90 s after the ball is released from his hands. What is the speed of the ball? The speed of sound is 340 m/s. Answer ...
*September 5, 2014*

**Science independent variable**

A scientist designed an experiment to test the effect of temperature on bacterial growth. He grew three different cultures of the bacterium E. coli under three heat lamps at different temperatures. What was the independent variable in this experiment?
*September 3, 2014*

**SOMEONE HELP PLEASE..DUE AT MIDNIGHT**

Can't help. You will need to post one question at a time. Besides, we don't do homework for you. We help, not giving out answers sorry.
*September 3, 2014*

**math**

So is it 96? I don't want to get it wrong for my final score. Hi said that its wrong.
*August 8, 2014*

**math**

Mike gave Danny 4 more marbles than he already had. He now has 100 marbles. How many marbles did Mike give to Danny? I dont no the answer
*August 8, 2014*

**Math**

Find the number of units that produces a maximum revenue. The revenue R is measured in dollars and x is the number of units produced. R = 80x – 0.0001x^2
*June 8, 2014*

**physics**

An astronaut on Triton throws a 0.142 kg baseball straight up with a velocity of 24 m/s. How high does the baseball go?
*June 2, 2014*

**Math 8th Grade!!!!**

27 - (-9) (-2) ÷ 3 * (-4) - 0 - 33 - (-39)
*May 21, 2014*

**Math 8th gr.**

Tysm!
*May 20, 2014*

**Math**

In triangle PQR, <R=90 degrees, <Q=10 degrees and RQ=16 cm. Find PR.
*April 15, 2014*

**Quick Question**

Okay, thank you.
*April 11, 2014*

**Quick Question**

I am trying to find an online radio podcast that middle school students can use to host their own radio show. Can you help me research some?
*April 11, 2014*

**Math**

Oh okay. Thank you. I appreciate it.
*April 3, 2014*

**Math**

John spoke to his friend from 10:15am-11:00am. And then John spoke to that same friend again from 12:30pm-1:15pm. altogether, how many minutes did John speak to his friend? How do I figure this out?
*April 3, 2014*

**science(check answers)**

number nine should be air c
*March 21, 2014*

**Math**

For the graph y find both x-intercepts by solving the equation 3x^2 - 24x + 45 =0 a) Direction of opening b)y-intercepts c)Axis of symmetry d) vertex e) max or min
*March 8, 2014*

**math**

For the graph y find both x-intercepts by solving the equation 3x^2 - 24x + 45 =0
*March 8, 2014*

**Math**

the answer is 2 5/6
*February 6, 2014*

**College science**

Im in Chem. but looks like physics.. If a rock climber accidentally drops a 70.5 g piton from a height of 295 meters, what would its speed be just before striking the ground? Ignore the effects of air resistance.
*February 1, 2014*

**physics..**

What is the maximum height achieved if a 0.800 kg mass is thrown straight upward with an initial speed of 40.0 m·s–1? Ignore the effect of air resistance.
*February 1, 2014*

**Chemistry**

alright, thanks lol
*February 1, 2014*

**Chemistry**

Thats what it looks like.. but im taking chem. in college and have never had a physics course, im really lost.
*February 1, 2014*

**Chemistry**

What is the maximum height achieved if a 0.800 kg mass is thrown straight upward with an initial speed of 40.0 m·s–1? Ignore the effect of air resistance.
*February 1, 2014*

**Chemistry**

Thank you x)
*February 1, 2014*

**psychology**

where does spanking fall between punishment and discipline
*January 26, 2014*

**Geography HELP**

HOw do I explain how you would make a scale map of a room in your home.
*November 22, 2013*

**Calculus Fundamental Theorem**

Thank you!
*November 20, 2013*

**Calculus Fundamental Theorem**

Evaluate the definite integral. function: (t+8)(t^2+3) with respect to variable t lower limit: -sqrt(2) upper limit: sqrt(2)
*November 20, 2013*

**Calculus Fundamental Theorem**

Original problem was: absolute value x-13, because of absolute value I made it x+13
*November 20, 2013*

**Calculus Fundamental Theorem**

I tried that way, my answer was wrong
*November 20, 2013*

**Calculus Fundamental Theorem**

Evaluate the definite integral. function: x+13 with respect to variable x lower limit:0 upper limit:22
*November 20, 2013*

**Calculus Sigma Notation **

Find a and n such that: 8+16+32+64+128 (k=a) a=? n=?
*November 10, 2013*

**Calculus-Antiderivative **

Solve the following initial value problem: dr/dt=7cos(pi(t)), r(1/4)=14 r(t)=?
*November 8, 2013*

**Chemistry**

explain why glucose 1,6 bisphosphate would not be able to go through the aldolase reaction.
*October 20, 2013*

**Chemistry**

Explain using electron-pushing arguments why glycolysis must go through G6P to F6P step (C1 aldehyde to C1 ketone). Focus on the subsequent aldolase-catalysed reaction and explain why glucose 1,6 bisphosphate would not be able to go through the aldolase reaction.
*October 19, 2013*

**Chemistry**

Explain using electron-pushing arguments why glycolysis must go through G6P to F6P step (C1 aldehyde to C1 ketone). Focus on the subsequent aldolase-catalysed reaction and explain why glucose 1,6 bisphosphate would not be able to go through the aldolase reaction.
*October 19, 2013*

**Math, HELP!! UGENT!**

Find the value of k so that the line containing the points (−8,8) and (2,k) is perpendicular to the line containing the points (14,−8) and (9,−6).
*September 14, 2013*

**math**

the lengths of the three sides of a right triangle R have odd integer values and two of the three sides have lengths 3 and 5. What is one possible length of the third side?
*July 23, 2013*

**Calculus**

Evaluate ∬R xy dA, where R is the region bounded by x^2+y^2≤36, x≥0 and y≥0.
*July 7, 2013*

**Chemistry**

Calculate Activation Energy, Ea, for each of the reactions, above? ln(k)= -2.24x10^4(1/T)-1.8. The reactions are Step 1: 2H2 + N2 -> N2H4, Step 2: N2H4 + H2 -> 2NH3, Overall: 3H2 + N2 -> NH3. This is all the information i have. i Don't know how to solve for the ...
*June 4, 2013*

**Math**

(-3xy^2)^2(-2x^5y^3)^3
*June 3, 2013*

**Literature**

In order to get an idea of significant subject areas in a chapter, it is best to read the: A. subheads. B. graphics. C. captions. D. table of contents.
*May 21, 2013*

**Physics**

nearly everybody has witnessed a lunar eclipse, but relatively few people have seen a solar eclipse? why
*May 2, 2013*

**Math 7th Geometery**

yes hieght is 12m Yes 3 rectangles. yes two outside ones equal 31 by 23 Yes smaller one at the base is 23m Yes all right. your awesome! This was a tough one for me. But you helped me see where I was confused. Thank you so much.
*April 24, 2013*

**Math 7th Geometery**

I have a complex figure like a U shape. I understand the formula for this is l x w = a Can you show me the steps? 31m is parael to 31m this would be the height (sides of the U)?? or is this the width? Length 69m Width is on the right top of U 23m. Inside the middle of the ...
*April 24, 2013*

**Justice**

The correct answer is letter C
*April 10, 2013*

**chemistry**

What is the molar concentration of sodium ions in a 0.450 M Na3PO4 solution?
*March 30, 2013*

**Trig**

Thank you very much!
*March 28, 2013*

**Trig**

How exactly do you get there though? I tried to follow a similar homework problem and got: = (cos^2)*(67.5deg) - (sin^2)*(67.5deg) = cos(2*67.5deg) = cos135deg = -√2/2
*March 28, 2013*

**Trig**

Simplify (sin^2)*(67.5deg) - (cos^2)*(67.5deg) and then evaluate exactly.
*March 28, 2013*

**math**

you shared a pizza with two friends You ate 1/8 of the pizza.One of your friends ate 5/8 of the pizza and the other ate 1/8 of the pizza. What fraction of the pizza did you and your friends eat?
*March 18, 2013*

**US History**

What gave Andrew Jackson the power to remove the Cherokee from their land? Georgia state laws Acts of Congress two Supreme Court decisions treaties signed by the Cherokee Im thinking two Supreme Court decisions?
*March 1, 2013*

**US History**

What did the Supreme Court cases and the ultimate outcome for the Cherokee suggest about future dealings between the United States government and Native Americans? (3 points) The U.S. government would most likely follow the rule of law and abide by court decisions. The U.S. ...
*March 1, 2013*

**US History**

Im thinking its The British territory was smaller than that of the U.S?
*March 1, 2013*

**US History**

A treaty was signed in 1842 to end the border dispute between the United States and Britain in Maine. Which best expresses the end result for Britain? the British lost all the territory in Maine The British territory was bigger than that of the U.S. The British territory was ...
*March 1, 2013*

**US History**

countries
*March 1, 2013*

**US History**

so to warn the european colonies?
*March 1, 2013*

**US History**

I really don't know. I was taking Wold history before i moved and now i have a a review sheet on stuff i havent even learned. a?
*March 1, 2013*

**US History**

Which answer best describes the main purpose of Monroe Doctrine? to claim new United States territories in the West to warn European countries to stop colonization in the Western Hemisphere. to express that American politics and ideals were superior to encourage Americans to ...
*March 1, 2013*

**US History**

to establish a line between slave and non slave states?
*March 1, 2013*

**US History**

What was the goal of the Missouri Compromise? to create a slave state and a non-slave state to create a free state where fugitive slaves could live to establish a line between slave and non-slave states to settle a disagreement between Missouri and Arkansas
*March 1, 2013*

**US History**

What was the goal of manifest destiny? to expand America's borders to remove Native Americans to create an alliance with Mexico to move settlers west beyond the Appalachians
*March 1, 2013*

**US History**

the removal act isnt even an option. i honestly thought about it.
*March 1, 2013*

**US History**

Acts of Congress? Weren't the congress against the Indians and all that?
*March 1, 2013*

**US History**

What gave Andrew Jackson the power to remove the Cherokee from their land? Georgia state laws Acts of Congress two Supreme Court decisions treaties signed by the Cherokee
*March 1, 2013*

**Chemistry**

Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 17.3 g of biphenyl in 34.0 g of benzene?
*February 25, 2013*

**Physics HELP PLEASE**

If 10-kg of ice at 0 degrees Celsius is added to 2-kg of steam at 100 degrees Celsius, the temperature of the resulting mixture is? Use Joules. ANSWER: 40 Specific Heats: Ice = 2060 Steam = 2020 Latent Heats: Water melting = 3.33x10^5 Water boiling = 2.26x10^6
*February 11, 2013*

**math**

A family group of 6 went to a show. Tickets for adults are $6. Tickets for children are $4 dollars. The family spent $30 dollars on tickets. How many adult and children tickets did they buy?
*February 10, 2013*

**chemistry**

If 145 J of heat energy is applied to 34.47 g of an unknown metal, the temperature increases from 61.0 degree C to 78.5 degrees C. What is the specific heat capacity of the unknown metal?
*January 31, 2013*

**Chemisty **

If 1 gram of sugar is 4 Calories(kcal) how many calories are in one sugar cube
*January 30, 2013*

**math HELP!**

Kara's custom tees experienced fixed costs of $300 and variable costs of $5 a shirt. write and equation that can be used to determine the total expenses encountered by kara's custom tee's. Let x be the number of shirts and let C(x) be the total cost of producing x ...
*January 27, 2013*

**math**

evaluate f(x) at the given values of x. f(x)=2. x=-11,5/2
*January 27, 2013*

**math**

find the slope intercept form for the line satisfying the following conditions: y-intercept=2 y-intercept =2/3
*January 27, 2013*

**math**

a certain mountain has an elevation 19580 feet in 1907 the glacier on its peek covered 8 acres by 2002 this glacier had melted to 1 acre assume the glacier melted at a constant rate each year find this yearly rate
*January 27, 2013*

**art**

thnks
*January 26, 2013*

**art**

h t t p://w w w .s h u t t e r s t o c k . c o m / p i c -2 2 2 3 0 9 2 8/s t o c k -p h o t o-e a g l e-a n d-f l a g-o n-u n i t e d-s t a t e s-f l a g.h t m l it is eagle.
*January 26, 2013*

**art**

it has six stars
*January 26, 2013*

**art**

well it is not online. i cannot upload it.
*January 26, 2013*

**art**

do you know name of this picture? it is dragon flying and kind of holding the flag which is of united states and it has six flags. and up it has curve. it is symbol please help me.
*January 26, 2013*

**physics**

A wave travels 750 meters in 5 minutes. Its wavelength is 16.1 meters. What is its period?
*January 16, 2013*

**AP Physics B**

A 1.2 kg rectangular air mattress is 2.1 m long, 0.46 m wide, and 0.09 m thick. If it has a mass of 1.2 kg , what additional mass can it support in water?
*January 15, 2013*

**math**

invest 5% compounded semiannually I want to have 23,000 in the future how much I will deposit now to have that amount 5 years from now
*January 13, 2013*

**science**

list two things that car manufacturers do to improve a car's efficiency
*January 13, 2013*

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