Monday

July 6, 2015

July 6, 2015

Total # Posts: 2,501

**Physics**

How far from the center of the earth must a satellite be placed so that the acceleration due to gravity is half the value at the surface? (Hint: the diameter of the earth is 1.3x107 m.)
*December 3, 2013*

**Physics**

Thank you so much, you hit it right on the nail
*November 27, 2013*

**Physics**

Traveling in the city its faster to take a bicycle than a bus, one reason for this is that a bike can accelerate faster than a bus. Let’s say a Bike and bus both stopped at a red light and both takes off an exact same time when the light turns green. The bike accelerates ...
*November 27, 2013*

**chem**

A 1-L flask is filled with 1.25g of argon at 25 ∘C. A sample of ethane vapor is added to the same flask until the total pressure is 1.35atm . What is the partial pressure of argon, PAr, in the flask? What is the partial pressure of ethane, Pethane, in the flask?
*November 25, 2013*

**Differential Equations**

There is no y(0) givien, so I'm not sure how to go from there.
*November 25, 2013*

**Differential Equations**

Use the Laplace Transform to solve this initial value problem. y'''' - 8y = 0, y'(0)=63, y''(0)=216, y'''(0)=297 I would really appreciate the help.
*November 25, 2013*

**5th Grade Math**

Her brother won 6 out of 15. 6/15 = 0.4 Multiply this by 100: 0.4*100 = 40% If there were only 10 prizes, and her brother won 40% of them, then he won 4 prizes. 10*0.4 = 4 Hope that helps!
*November 25, 2013*

**math**

A map has a scale of 3 centimeters = 4 kilometers. If two cities are 8 centimeters apart on the map, what is the actual distance between the cities, to the nearest tenth of a kilometer?
*November 20, 2013*

**Biology**

The half-life of carbon-14 is 5,700 years. If a sample originally had 26 g of carbon-14, how much would it contain after 22,800 years?
*November 19, 2013*

**Algebra**

t^9 x t^-8 I don't really understand how to do the whole negative exponent thing...
*November 18, 2013*

**math**

Input/output 6 18 7 21 8 24 9 27 question... if jack buys 12 toys, what is the cost?
*November 18, 2013*

**using expressions to describe patterns**

If jake buys 12 toys what is the cost
*November 18, 2013*

**American History!!!**

How was the development of interchangeable parts an example of the move to make work "less skilled" in the early 1800s?
*November 16, 2013*

**Math**

Copy and paste the link in your browser.
*November 15, 2013*

**Math**

C:\Users\Owner\Pictures\Graph.png Each square on this graph paper is 1/4 Scale: 1/4 inch = 18 inches What are the actual dimensions of the sofa in inches? a. 90x45 b. 90x36 c. 75x25 d. 80x30
*November 15, 2013*

**American History**

How did the textile mills develop in the United States?
*November 15, 2013*

**Science**

b d c c connexus studenta this is so rad with out this site i would be failing
*November 15, 2013*

**Evaluating Expressions**

3D+(5-D);D=4 ------ 2. 8+2G-G/2;G=6
*November 14, 2013*

**Earth and Environmental Science**

How much does the amplitude of the waves increase between an earthquake that measures 4.2 on the Richter scale and an earth quake that measures 6.2 on the Richter scale?
*November 12, 2013*

**Math**

Terrence normally uses one-fourth teaspoon of dried basil to make his own salad dressing. He decides to change the recipe and include extra dried basil. He decides that the flavor is perfect when including a total of five-eighths teaspoon. Write an addition equation that could...
*November 12, 2013*

**Science**

that what i was thinking i go to Florida virtual school
*November 6, 2013*

**4th grade math**

Rock band often stack their speakers in an array. One teen band has 24 speakers they stack them at least 2 high but no taller then 8 high what are all the different arrays they can make
*November 4, 2013*

**Math**

Determine whether each verbal description represents a linear function or not. Correct me if I'm wrong on any of these!! 6.The price for x pounds of cheese at $6.99 per pound (LINEAR FUNCTION) 7. A car accelerating on the highway to reach a speed of 62 mph then slowing ...
*October 30, 2013*

**Math**

Determine whether each verbal description represents a linear function or not. Correct me if I'm wrong on any of these!! 1. Jova walks quickly for 25 minutes then she rests for 5 minutes before continuing on for another 10 minutes. (NOT A LINEAR FUNCTION) 2 A rock that is...
*October 30, 2013*

**Earth and Environmental Science**

The solar wind can be thought of as evidence for which theory of light?
*October 28, 2013*

**Math**

find the value of x or y so that the line through the points has the given slope. (12,y) and (15,-8); slope: 2/3
*October 23, 2013*

**AP Macroeconomics**

3. You buy a certificate of deposit (CD) that pays a nominal rate of 12% annually. You have a tax rate of 25%, so if the interest on this CD is taxable (which it may not be) your after-tax nominal rate is (1 ñ 25%) • 12% = 9%. Since 10% equals .1, we can rewrite ...
*October 21, 2013*

**AP Macroeconomics**

I need help!!! I don't understand this at all, and neither does my history teacher. Please help explain it in a simpler way if possible. Thank you!!!! question: which of these is not a component of the interest rate on a 30 year us government bond? A.) Transaction costs of...
*October 21, 2013*

**AP Macroeconomics**

1. As an example of a price index, consider the A.C.D.P.I. (a fictitious price index). The associated basket of goods is: Good Quantity Price Coffee 3 lb $8/lb Bread 3 loaves $1/loaf Tea 1 lb $15/lb Aspirin 1 200-tablet bottle $2/bottle Cola 1 case $6/case A. If the price of ...
*October 20, 2013*

**AP Macroeconomics**

Which of these is a component of the interest rate on a 10-year inflation indexed US government bond? A.)Risk that the borrower will default B.)Positive rate of time preference C.)Expected inflation rate D.)general uncertainty about the future
*October 20, 2013*

**Science**

They're all correct!
*October 8, 2013*

**physics**

A superhero ﬂies 285 m from the top of a tall building at an angle of 15 ◦ below the horizontal. What is the horizontal component of the superhero’s displacement? Draw the vectors to scale on a graph to determine the answer. Answer in units of m Your answer ...
*September 30, 2013*

**Pre Calculus**

He needs two adjacent rectangular enclosures - he has 300 feet of fencing. a. find a function that models the total area of enclosures with respect to the width of the enclosures. b. write your function in vertex form using the vertex formula. c. what is the largest area that ...
*September 29, 2013*

**HEALTH HELP PLZ**

can you give me an example?
*September 27, 2013*

**HEALTH HELP PLZ**

You have just found out your friend has broken up with a boyfriend or girlfriend. You have always liked the ex-boyfriend (ex-girlfriend) and wonder if you should ask him (her) out. You're not sure how your friend would feel about that. You decide to ask another friend'...
*September 27, 2013*

**skills for health**

thanks, this really helped me out
*September 26, 2013*

**skills for health**

i need some help for ideas of positive feedback.
*September 26, 2013*

**Math**

A farmer wishes to enclose a rectangular region with 196 meters of fencing in such a way that the length is twice the width and that the region is divided along its length into two equal parts. What is the length and width in meters?
*September 17, 2013*

**Calc BC**

Figure out the 35th derivative for xsinx. You have to do a few derivatives by hand to figure our a pattern and then predict the 35th one
*September 11, 2013*

**Physics 2 **

An unknown substance has a mass of 0.125 kg and an initial temperature of 98.0°C. The substance is then dropped into a calorimeter made of aluminum containing 0.285 kg of water initially at 30.0°C. The mass of the aluminum container is 0.150 kg, and the temperature of ...
*September 9, 2013*

**Physics**

If a person can jump a maximum horizontal distance (by using a 45° projection angle) of 2.07 m on Earth, what would be his maximum range on the Moon, where the free-fall acceleration is g/6 and g = 9.80 m/s2?
*September 7, 2013*

**math**

i am confused
*August 29, 2013*

**math**

why would it be 36feet x 44 feet? i am confused.
*August 29, 2013*

**math**

are you sure
*August 29, 2013*

**math**

the blueprint for landscaping a yard has a scale of 1/2'' to 1 foot.If the blueprint is a rectangle 18 inches by 22 inches, what are the dimensions of the yard?
*August 29, 2013*

**math**

the blueprint for landscaping a yard has a scale of 1/2'' to 1 foot.If the blueprint is a rectangle 18 inches by 22 inches, what are the dimensions of the yard?
*August 29, 2013*

**Math **

1) evaluate without a calculator: a)sin(3.14/4) b) cos(-3(3.14)/4) c) tan(4(3.14)/3) d) arccos(- square root of three/2) e) csctheata=2 2) verify the following identities: a) cotxcosx+sinx=cscx b)[(1+sinx)/ cosx] + [cosx/ (1+sinx)]= 2secx c) (sin^2x + 2sinx+1)/cos^2x= (1+sinx...
*August 22, 2013*

**Math**

1) What is the amplitude, period, horizontal shift (relative to basic function), and vertical translation of the following: a) -3cos(x+ 3.14/4) and b) 2sin(x-3.14/2)+3 2) evaluate the following expressions: a) log2 cubed root of 16 b) log25 (1/125) c) e^2ln5 d) ln 1/the cubed ...
*August 22, 2013*

**chemistry**

what is the concentration of a 250 ml solution that contains 44 grams of magnesium fluoride
*August 21, 2013*

**chemistry**

during an experiment, 20 ml of 4 M hydrochloric acid is mixed with 30 ml of water. what is the concentration of your new solution
*August 21, 2013*

**Physics**

One long wire carries current 26.0 A to the left along the x axis. A second long wire carries current 68.0 A to the right along the line (y = 0.280 m, z = 0). Where in the plane of the two wires is the total magnetic field equal to zero?
*August 15, 2013*

**math**

what is the cost of 3 notebooks at 20% discount, a binder at 25% discount, and 2 pens. 1 notebook: $1.79 1 pen: $2.89 1 Binder: $3.19
*August 11, 2013*

**Math**

When a ball is thrown in the air at 15mps from a height of 1 ft, how long does it take for the ball to hit the ground?
*July 15, 2013*

**RE**

I have to draw upon the Christian parallels within the story of The Lion, the Witch and the Wardrobe. I have found information on all the characters other than the beavers. could anyone shed some light on this. thanks
*July 14, 2013*

**writing**

1)whose
*July 11, 2013*

**Written Communication**

I was stuck between bigamy and misogyny. I'm leaning more towards bigamy now, after some internet researching.
*July 11, 2013*

**Written Communication**

misogyny (hate against women; ex: domestic violence against women?) That's what I think.
*July 11, 2013*

**Chemistry AP**

The numbers are different, so I will remember to post them next time.
*July 11, 2013*

**Chemistry AP**

OH I GET IT NOW, the canceling of units This is great. Thank you again.
*July 11, 2013*

**Chemistry AP**

(Oh yeah, sorry about the sign, and I forgot a bracket after that perentices, I meant to say "what are the temperatures in Kelvin?".) I'm sorry for my slowness, I'm actually learning from the textbook without any teacher guidance, so I can't ask a teacher...
*July 11, 2013*

**Chemistry AP**

Oh and sorry, 10.12 mL or 10.12 cm^3
*July 11, 2013*

**Chemistry AP**

Yes. I understand the degree difference that they are asking for, but I'm having trouble with calculations. They give me the numbers 200.0 F and -100.0F and when I convert those to celcius, I think the significant numbers for each answer should have 4 significant answers. ...
*July 11, 2013*

**Chemistry AP**

Also it would be nice to see multiple ways, so do you think you could show me the other way in which the problem asks for the use of mass perecent of copper= (mass of copper/total) x100?
*July 11, 2013*

**Chemistry AP**

I don't quite understand why you multiplied 10.501 (density of silver) by (1-x). And what was the point of the problem talking about "assume that the volume of silver present plus the volume of copper.."? Thanks for your help Steve
*July 11, 2013*

**Chemistry AP**

I'm using Zumdahl 7th Edition Chemistry Book and I'm having trouble with some practice problems in the first chapter. Here are a few: 87: Sterling silver is a solid solution of silver and copper. If a piece of a sterling silver necklace has a mass of 105.0 g and a ...
*July 11, 2013*

**Math**

If 1 more than a certain number is 3 less than a second number, the larger of these numbers minus the smaller is equal to?
*July 1, 2013*

**Math**

Oatmeal Recipe: Water 3/4 cup Salt: 1/4 teaspoon Oats: 1/3 cup If the least possible multiple of the recipe above is prepared so that a whole number of cups of both water and oats are used, how many teaspoons of salt would be required?
*July 1, 2013*

**Math Gr 11**

"A rock is dropped from the edge of a 180 m cliff. the function f(x) = -5t^2 - 5t + 180 gives the height of the rock, h(t), in meters t seconds after it was released. How long does it take for the rock to reach a ledge 80 m above the base of the cliff?" I have no ...
*June 20, 2013*

**Math**

an algorithm word problem
*June 3, 2013*

**geometry**

450 cm3
*May 23, 2013*

**first additional language **

how did youth day came?
*May 19, 2013*

**math**

what is the rule of the input output table input 2 output 11 input 3 output 15 input 5 output 18 input 8 output? what is the rule?
*May 15, 2013*

**C/Justice**

it could be B.
*May 9, 2013*

**C/Justice**

The inmate code is: A. the set of rules for inmate behavior established by prison officials. B. an informal set of rules of inmate behavior that is part of the prison culture. C. a secret language inmates use to communicate with each other in the presence of guards or other ...
*May 9, 2013*

**C/J**

The role of the defense attorney is to: A. decide the innocence of the accused. B. get his or her client off by whatever means. C. give the client every resource available to defend himself or herself within the limits of ethics and law. D. act as a legal technician to get his...
*May 8, 2013*

**life orientation **

5 ways in which the human or environmental problem impact on the community on Hiv&aids
*May 8, 2013*

**help please **

Although its meaning may vary from one culture to the next, __________ appears to be an almost universal taboo. A. murder B. rape C. theft D. incest D am i correct?
*May 4, 2013*

**Physics 1**

A steel wire in a piano has a length of 0.5000 m and a mass of 3.800 10-3 kg. To what tension must this wire be stretched in order that the fundamental vibration correspond to middle C (fC = 261.6 Hz on the chromatic musical scale)?
*May 3, 2013*

**calculus**

Find the derivative y = e^(-5x) + cos^3 x F(x)= (x^2 -x+1)^3
*April 29, 2013*

**Chemistry **

A sample of argon gas at STP occupies 56.2 liters. Find the number of moles of argon and the mass in the sample
*April 27, 2013*

**Math**

How do you find the equation of a line with a slope of 2 and containing the points 1,5
*April 25, 2013*

**math**

An alcohol solution consists of 6 gallons of pure water and x gallons of alcohol, x > 0. Let f(x) be the ratio of the volume of alcohol to the total volume of liquid. [Note that f(x) is the concentration of the alcohol in the solution.] (a) Find a possible formula for f(x).
*April 23, 2013*

**landmark project**

thank you but can you help me think of 3 questions for palace of fine arts
*April 23, 2013*

**landmark project**

I am not impatient
*April 23, 2013*

**landmark project**

please
*April 23, 2013*

**landmark project**

i really need help
*April 23, 2013*

**landmark project**

did any workers die while building the palace of fine arts
*April 23, 2013*

**landmark project**

did any workers die while building the palace of fine
*April 23, 2013*

**math**

An alcohol solution consists of 6 gallons of pure water and x gallons of alcohol, x > 0. Let f(x) be the ratio of the volume of alcohol to the total volume of liquid. [Note that f(x) is the concentration of the alcohol in the solution.] (a) Find a possible formula for f(x).
*April 23, 2013*

**Math**

The invested in a bank savings accouint is coumpounded continousl, with an annual interest rate of 3%. If a deposit of $2000 is made, then determine the balance after 2 years
*April 22, 2013*

**physics**

Two speakers are wired to emit identical sounds in unison. The wavelength in air of the sounds is 6 m. Do the sounds interfere constructively or destructively at a point 10 m from both speakers? 1. Destructively 2. Neither 3. Constructively
*April 21, 2013*

**General Chemistry**

"How would you prepare 150. mL of 0.1M sodium hydroxide given a stock solution of 3.0M NaOH?" I made calculations and figured the process would be to dilute 5 mL of the 3.0M NaOH to 150. mL. Is this correct? For the ideal 150. mL of 0.1M NaOH, I calculated there to ...
*April 21, 2013*

**math**

Take an 17 by 11-inch piece of paper and cut out four equal squares from the corners. Fold up the sides to create an open box. Find the dimensions of the box that has maximum volume. (Enter your answers as a comma-separated list. Round your answer to three decimal places.)
*April 21, 2013*

**Calculus**

A University of Rochester student decided to depart from Earth after his graduation to find work on Mars. Before building a shuttle, he conducted careful calculations. A model for the velocity of the shuttle, from liftoff at t = 0 s until the solid rocket boosters were ...
*April 21, 2013*

**Physics**

A convex lens of focal length 2.5 cm is placed 4 cm from a small object of height 4 cm. Use a ruler and construct the image. Is the image real or virtual, upright or inverted? What is the image distance? What is the height of the image? What is the magnification?
*April 21, 2013*

**landmarks**

none of those tell me who named palace of fine arts
*April 20, 2013*

**landmarks**

ther are so many websites , i do not know which website do you want me to read about
*April 20, 2013*