Saturday

February 6, 2016
Total # Posts: 1,249

**Physics..PLZ HELP!! **

A rollercoaster reaches the top of the steepest hill with a speed of 6.0 km/h. It then descends the hill, which is at an average angle of ?=45 and is 45.0 m long. Estimate its speed when it reaches the bottom. Assume µk=0.18.
*October 8, 2012*

**Calculus...plz help!!**

find dy/dx of xsiny-ycosx=1
*October 7, 2012*

**CALCULUS help!!!=))**

find dy/dx (-x^2)(y)+2xy=3y^2-7
*October 7, 2012*

**CALCULUS help!!!=))**

find dy/dx -x^2y+2xy=3y^2-7
*October 7, 2012*

**CALCULUS help! =)**

find the derivative of f(x)=3x^2-x using the limit definition.
*October 7, 2012*

**calculus PLZ HELP!!**

find the equation for the line tangent to the curve at the given point. (x^2)(y^2)-2xy+x=1 at (2, 1/2)
*October 7, 2012*

**calculus =)**

find the derivative of g(x)=sin(cos(sin(pi*x)))
*October 7, 2012*

**calculus**

grain is being poured through a chute at rate of 8 ft^3/min and forms a conical pile whose radius of the bottom is always 1/2 the height of pile. How fast is circumference increasing when the pile is 10 feet high?
*October 7, 2012*

**Physics**

Centrifuges are commonly used in biological laboratories for the isolation and maintenance of cell preparations. For cell separation, assume centrifugation conditions that are 1.00 x 103 rpm using an 8.16-cm-radius rotor. What is the radial acceleration of material in the ...
*October 3, 2012*

**American Government**

I have went back and re read my chapter I'm still having problems with this question. I have changed my answer from B to C less accurate than the idea that Americans form many publics, which differ greatly in such things as the level of attention thy pay to politics. ...
*October 2, 2012*

**American Government**

The term "public opinion" is frequently used in reference to all of American society. This perspective is? A. accurate, since Americans are one people and indivisible B. less accurate than view of public opinion based on majority, since the political system operates ...
*October 2, 2012*

**American Government**

A member of Congress who wants to act on what the majority of his or her constituency thinks on a particular issue would be advised to respond to which of the following indicators? A. letters from constituents B. the editorial positions of newspapers in the country C. PUBLIC ...
*October 2, 2012*

**PHYSICS**

A projectile is fired from the surface of the Earth with a speed of 150 meters per second at an angle of 45 degrees above the horizontal. If the ground is level, what is the maximum height reached by the projectile?
*October 1, 2012*

**AP PYHSICS**

A projectile is fired from the surface of the Earth with a speed of 150 meters per second at an angle of 45 degrees above the horizontal. If the ground is level, what is the maximum height reached by the projectile?
*October 1, 2012*

**Computers**

Daily Life Magazine wants an analysis of the demographic characteristics of its readers. The Marketing Department has collected reader survey records containing the age, gender, marital status, and annual income of readers. Design an application that accepts reader data and ...
*September 30, 2012*

**Physics**

Luke stands on a scale in an elevator which has a constant acceleration upward. The scale reads 0.964 kN. When Luke picks up a box of mass 18.2 kg, the scale reads 1.202 kN. (The acceleration remains the same.) Calculate the acceleration of the elevator (enter first). Is it up...
*September 27, 2012*

**us history**

what are the political and social trends from westward expansion
*September 26, 2012*

**Physics**

If accerlation is constant, then that would show a straight line on the graph, correct? So that line has a slope=0.
*September 24, 2012*

**Physics**

When a baseball is tossed directly upward, what is the slope of a plot of its acceleration versus time during the upward flight? plot has constant positive slope plot has constant negative slope plot has zero slope I think it is zero slope
*September 24, 2012*

**us history**

what are the political and social trends from westward expansion
*September 24, 2012*

**physics**

A model sailboat is slowly sailing west across a pond at 0.342 m/s. A gust of wind blowing at 28.7° south of west gives the sailboat a constant acceleration of magnitude 0.305 m/s2 during a time interval of 1.87 s. If the net force on the sailboat during the 1.87-s ...
*September 24, 2012*

**physics**

The coefficient of static friction between a block and a horizontal floor is 0.414, while the coefficient of kinetic friction is 0.107. The mass of the block is 4.03 kg. A horizontal force is applied to the block and slowly increased. What is the value of the applied ...
*September 23, 2012*

**Physics**

A gull is flying horizontally 8.17 m above the ground at 6.35 m/s. The bird is carrying a clam in its beak and plans to crack the clamshell by dropping it on some rocks below. Ignoring air resistance, what is the horizontal distance to the rocks at the moment that the gull ...
*September 23, 2012*

**Physics**

1) On a plot of position x versus time t for an object’s motion, what corresponds to the object’s velocity at any given instant t1? A. slope at the point on the plot corresponding to t1 B. intercept on the horizontal axis C. inverse of the slope at the point on the ...
*September 21, 2012*

**Math**

A landscaper plans to cover a 9-by-18-foot rectangular flower bed with bark dust 3 inches deep.The bark dust he is using costs $26 per cubic yard.What will be the total cost of the bark dust for this job? A) $64 B) $49 C) $39 D) $54
*September 18, 2012*

**math**

How to use a number line to round 148 to the nearest ten.
*September 17, 2012*

**physics**

a uniform meter stick is balanced at its midpoint with a single support. a 50 N weight is suspended at the 30 cm mark. at what point must a 20 N weight be hung to balance the system
*September 16, 2012*

**physics**

a person weights 550 N rides a bike. the pedals move in a circle of radius 30 cm. if the entire wt acts on each downward moving pedal, what is maximum torque
*September 16, 2012*

**physical science**

A 136-lb. student races up stairs with a vertical height of 4.8 m in 6.0 s to get to a class on the second floor. How much power in watts does the student expend in doing work against gravity?
*September 9, 2012*

**physical science**

What is the kinetic energy of a 29 kg dog that is running at a speed of 8.8 m/s (about 20 mi/h)?
*September 9, 2012*

**physical science**

How much work does gravity do on a 0.140-kg ball falling from a height of 14.0 m? (neglect air resistance)
*September 9, 2012*

**Physical science**

A man pushes a lawn mower on a level lawn with a force of 192 N. If 50% of this force is directed downward, how much work is done by the man pushing the mower 7.3 m?
*September 9, 2012*

**Physical science**

A 6.2 "kil" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.31 m. above the counter?
*September 9, 2012*

**Computers**

The Romance World Cruise Line provides special gifts for passengers who are newlyweds, as well as for those who have been married more than 40 years. Design a pseudocode for a program that accepts a couple's last name, ship cabin number, and number of years married. ...
*September 3, 2012*

**Algebra**

What the general term a_n for the geometric sequence a_1= -5 and a_2= 15
*September 2, 2012*

**Math**

which is the easies,t Arithmetic Series or a Geometric Series? and why?
*September 1, 2012*

**earth**

The radius of the Earth is approximately 6370 km. If one could dig down straight towards the center of the Earth, one would find that the outermost 2890 km (the crust and the mantle) has an average density of about 4.5 g/cm3. Farther down is the core. If the average density of...
*August 26, 2012*

**Algebra**

How is a quadratic inequality different from a quadratic equation?
*August 23, 2012*

**Algebra **

please help me on how to complete the table and evaluate f(x) x=0, x=1, x=2, x=3, x=4 f(x)7/x-1 my answers were -7 for x=0 7/0 for x=1 7 for x=2 7/2 when divided 3.5 ?? for x=3 7/3 when divided 2.3 ?? for x=4 I am not sure if this is correct.. please HELP ME..!
*August 16, 2012*

**Algebra II**

Please help! I am stuck on this one. Need to simplify the expression. Assuming all variables are real numbers. ∛(27(x+2)^3) my answer =3x+6 not sure is this is correct.
*August 8, 2012*

**Algebra II**

thank you :)
*August 8, 2012*

**Algebra II**

simplify by factoring ã90 is this correct? ^3ã10
*August 8, 2012*

**Algebra **

please help. I am not sure if this is correct. I need to simplify this to the lowest terms a^2 - 4b ^2 _____ ______ a+2b a+2b my answer is: a^2-4b^2 _________ a+2b is this really to the lowest term?? for some reason I think I am doing this wrong. Thank you!
*August 5, 2012*

**Algebra 1B**

Thank you so much! Now I undersand .. :)
*August 2, 2012*

**Algebra 1B**

Please help I am so confused... Question: supposed that y is directly proportional to x. a) use the given info to find constant of proportionally k. b) then use y=kx to find y for x=6 y= -62 when x=5 Please help.. thank you this is all I have so far. not sure if I am correct. ...
*August 2, 2012*

**chem**

What volume in liters is occupied by 8.22 g of SO2 gas confined at a pressure of 1200.8 torr at 75.0*c?
*August 1, 2012*

**chem **

A 5.00 liter sample of gas measured at 27.0*C and 1.25 atm presure has a mass of 10.13 g. What is the formula weight of the gas?
*August 1, 2012*

**chem**

Calculate the formula wright of a 2.50 g sample of gas whose volume is 1.40l at STP.
*August 1, 2012*

**CHEM**

A GAS TAKES UP 25.2 L AT 25*C. AT 25*c THE GAS CAN ALSO TAKE UP 12.2lAT 1520 TORR. WHAT WAS THE PRESSURE IN ATM, OF THE ORIGINAL SAMPLE? I GOT 4.1S ATM. IS THAT RIGHT?
*August 1, 2012*

**CHEM**

yes, by adding 273.15 right?
*August 1, 2012*

**CHEM**

IF A SAMPLE OF GASE HAVE A VOLUME OF 8.20 L AT 25*C AND 2.00 ATM, HOW MUCH VOLUME WILL IT TAKE UP IF YOU DECREASE THE PRESSURE TO 1.50 ATM AND INCREASE THE TEMPERATURE TO 100*C?
*August 1, 2012*

**Algebra**

Is it possible to factor a sum of two squares by using real numbers?
*July 26, 2012*

**Us History**

The Treaty of Versailles, explain what it was and why the United States refused to sign it. Predict how the missing signature of the United States might affect Europe in the future.
*July 21, 2012*

**Calc**

Not a fraction, so 331.7 thank you!!
*July 19, 2012*

**Calc**

The U.S. population is approximated by the function P(t) = 556 1 + 3.72e−0.5t where P(t) is measured in millions of people and t is measured in 30-year intervals, with t = 0 corresponding to 1930. What is the expected population of the United States in 2020 (t = 3)? (...
*July 19, 2012*

**psychology**

how effective is classical conditioning in the long tem
*July 15, 2012*

**economics**

Why might management and economic theories not always work in the real world?
*July 13, 2012*

**economics**

A copy company wants to expand production. It currently has 20 workers who share eight copiers. Two months ago, the firm added two copiers, and output increased by 100,000 pages per day. One month ago, they added five workers, and productivity also increased by 50,000 pages ...
*July 13, 2012*

**Math**

Joe drank 4 liters of water on Monday and 4 deciliters of water on Tuesday. How much more water did he drink on Monday than on Tuesday?
*July 10, 2012*

**Calculus**

Find if the limit exists. lim tan(x)/x x->0 Please show how you determined this. Thanks!
*July 1, 2012*

**Calculus**

Find an equation of the line that is tangent to the graph of f and parallel to the given line. Funtion: f(x)=1/sqrt(x-1) Line: x+2y+7=0
*June 30, 2012*

**Calculus**

**Note** Please use the Epsilon-Delta Definition.
*June 27, 2012*

**Calculus**

I have two similar problems that I need help completing. Please show all your work. Question: Find the limit L. Then use the å-ä definition to prove the limit is L. 1. lim (2x+5) x->3 2. lim 3 x->6 Thank you for your anticipated help!!
*June 27, 2012*

**Algrebra 1**

What are the practical uses of scientific notation? Why is scientific notation so important in modern-day society?
*June 26, 2012*

**english**

They are going to the park and play or they are going to the park to play. Which one is correct.
*June 26, 2012*

**english**

There are never enough discipline on the playground: someone always is getting hurt. Subject verb agreement.
*June 26, 2012*

**Grammar**

Everything looks good except #3, it is supposed to be Was.
*June 21, 2012*

**reading**

You don't want to put your the title of the essay in the introduction. An introduction has to have a grabber, thesis statment and also an idea of what we'll be reading. Sometimes that idea is part of th egrabber and that makes it stronger. People would want to read it...
*June 21, 2012*

**reading**

It looks like there are supposed to be choices. maybe if you put the choices down we'll help.
*June 21, 2012*

**Chemistry (1Question)**

This is really confusing. I know how to do the equilibrium which also has to do with reaction rates but they didb't give it to me as a choice. Please Please help me. I post other questions that i answered already but no one answered me. I just needed someone to check them ...
*June 21, 2012*

**To DrBob222(Please check Chem)**

#4 is the last choice for sure. I googled exothermics and i even found examples. #'s 12 and 14 look wrong to me also but those are the only choices i got.
*June 21, 2012*

**To DrBob222(Please check Chem) **

(This homework question has been removed due to a copyright claim submitted by K12 Inc.)
*June 21, 2012*

**Algebra(please help)**

Will someone please help me withthis question I couldn't solve it. What is the length of the segment whose endpoints are A(2, 3) and B(10, 7)? a)2 Sqrroot29 b)2 Sqrroot41 c)4 Sqrroot2 d)2 Sqrroot5
*June 19, 2012*

**Calculus**

Find the volume of the solid generated by the region in the first quadrant bounded above by the 3x+y=6, below by the x-axis, and on the left by the y-axis, about the line x= -2.
*June 3, 2012*

**chemistry**

The data in the table show the amount of a 500 g sample of sodium-24 over time. Make a graph of the data (remember to label all axes and title the graph). What is the half-life of sodium-24? Explain how you determined your answer. Sodium-24 decays by beta emission. Write a ...
*May 29, 2012*

**English (quick Sentence)**

Thanks. I forgot the comma ansd i used tha present tense when it is supposed to be the past tense.
*May 29, 2012*

**English (quick Sentence)**

Hi Teachers, I wrote a sentence in which i think has a wrong sentence structure. Will you correct me with it, please? When his daughter told us of what he said we promised that we will all be in part of helping him and making him feel like family.
*May 29, 2012*

**Comm 215**

Part1 looks good to me. I have to go:( I hope you get help with the rest.
*May 29, 2012*

**English**

It would be at the end of the cited work.
*May 28, 2012*

**English (Check Please)**

Hi Teachers, will you please check my answers? The arrows indicate my answers. Am I right? 1. The speaker’s use of many exclamation points and imperative statements in “Beat! Beat! Drums!” helps readers feel the tone’s humor. urgency. <--- quiet calm. ...
*May 28, 2012*

**English**

Type this question in bing and when the results come up it is the first one. very helpful paper, trust me! Where would i put a parenthetical citation for a work that needs to be credited? This is what you should press on. Parenthetical (in-text) Documentation (citation)
*May 28, 2012*

**English (Check)**

Thank you again Ms. Sue.
*May 28, 2012*

**English (Check)**

Thank you so much for your help Ms. Sue. I had already told my sister that i think it is abundance and energy because in thos lines it talks about the coolness and sweetness of Ohio. It also talks about the flutering leaves in a moderate wind. She thought i was wrong. Thank ...
*May 28, 2012*

**English (Check)**

Would it be suffering and loss? I'm just confused by this question.
*May 28, 2012*

**English (Check)**

I'm sorry i forgot to tell you that the arrows means indicate my answers. Am i correct?
*May 28, 2012*

**English (Check)**

Hi Teachers, will you please check my answers? 1. The speaker’s use of many exclamation points and imperative statements in “Beat! Beat! Drums!” helps readers feel the tone’s humor. urgency. <--- quiet calm. high spirits. 2. With what kind of life are ...
*May 28, 2012*

**Religion**

Hi Rebecca, I am a Muslim and Islam promotes peace. May i ask, what made you ask this question?
*May 28, 2012*

**Calculus**

Find the volume of the solid of revolution by roating the region R about the y-axis. Write the answer as a multiple of pi. y= sqrt(x), y=x^2, in the first Quadrant
*May 27, 2012*

**Chemistry**

In a calorimeter, 100 g of ice melts at 0oC. The enthalpy of fusion of the ice is 334 J/g. How much heat was absorbed? 33.4 J 334 J 33.4 kJ 334 kJ
*May 26, 2012*

**English ASAP**

I have to choose the sentence that has no error in italics. (Italicized) a)Their lawyers are handling the case pro bono and not charging them a dime. b)Yes, of course you can use (and) instead of a comma here. c)Oh, I see the problem; this (three) should be an (eight) <-- I...
*May 23, 2012*

**chemistry**

a student determines the molar mass of methanol by the method used in this experiment. she found that the equilibrium temperature of a mixture of ice and pure water was .4 degrees Celsius on her thermometer. when she added 10g of her sample to the mixture, the temperature, ...
*May 22, 2012*

**Calculus**

A container is in the shape of an inverted right circular cone has a radius of 2 in at the top and a height of 6 in. At the instant when the water in the conatiner is 5 in deep, the surface level is falling at the rate of -.4 in/s. Find the rate at which the water is being ...
*May 17, 2012*

**Calculus**

Find the third Derivative of f(x)=x(3x-7)^3 The answer is 3x-1134 but I attempted the problem multiple times and I keep ending up with 648x-1134. What am I doing wrong?
*May 17, 2012*

**Algebra2 {ASAP}**

Hi helper, I used permutation for the following question. How can i use combination to find the answer? Help me please! There are 12 red checkers and 3 black checkers in a bag. Checkers are selected one at a time, with replacement. Each time, the color of the checker is ...
*May 17, 2012*

**social studies 9**

Wouldn't this be reading or Literature? I think that Dickens gave him his name because he looks a bit chubby and is short. More like a bumble bee with a fat stomach. It is just a good guess and that is how i visulized him whem i read Oliver Twist by Charles Dickens.
*May 17, 2012*

**Algebra**

thank you! u r awesome... I wasnt too sure.. again thank you!
*May 16, 2012*

**Algebra**

Use the formula d=rt to find the value of the missing variable d=42 feet, t=14 seconds then r= ft. second
*May 16, 2012*

**MAT 116 (algebra)**

Please help not understanding this question. If the cost of a cell phone has decreased 400% during the past 10 years, does that correspond to a cost decrease of four times? Make up your own numbers in an example and then explain your answer as though you were talking to ...
*May 15, 2012*

**8 th grade**

Good job.
*May 14, 2012*

**English**

The styles are different. The “ Theme for English B” is a free style and the “Ballad of Birmingham' has rhythm. The rhythm he uses is ABCB, ABCB and so on. The themes for both the “Theme for English B” and “Ballad of Birmingham” are civil...
*May 13, 2012*