Friday

October 21, 2016
Total # Posts: 584

**Physics **

During takeoff, an airplane climbs with a speed of 180m/s at an angle of 42 degrees above the horizontal. The speed and direction of the airplane constitute a vector quantity known as the velocity. The sun is shining overhead. How fast is the shadow of the plane moving along ...

*September 14, 2016*

**Chemistry**

This was a multiple chocie question, so the possible answers are: A) 20,000 L B) 1000 L C) 10,000 L D) 2000 L E) 200 L D, 2000 L, is apparently the correct answer, but I don't know how to come to that conclusion.

*May 2, 2016*

**Math**

72

*May 2, 2016*

**programming and visual basics**

Using pseudocode or a flowchart write a program that does the following: Design the logic for the game Hangman, in which the user guesses letters in a hidden word. Store the letters of a word in an array of characters. Display a dash for each missing letter. Allow the user to ...

*March 30, 2016*

**Language Arts**

what is the participle or participial phrase in the following sentence: The art students, brought by bus, toured the museum.

*March 29, 2016*

**science**

How can i prepare a 100ml, 0.1M phosphate buffer solution (pH = 7) out of Na2HPO4 and NaH2PO4

*February 27, 2016*

**Math**

It's not 7 plus each. I know one of the answers is 6 because my teacher said its 7 days after the 28th on a calendar. Feb 28th + 7 days is march 6th. And another option is 35 because that is 28+7 but I still need 3 more possible answers, according to my teacher. It's ...

*February 25, 2016*

**Math**

Explain the attern generated by each of your answers. Find 5 different numbers that could be used to fill in the blank. 7,14,21,28,___ Please help me out if you could :)

*February 25, 2016*

**L.o**

Overport

*February 21, 2016*

**Physics**

what maximizes our ability to recover elastic potential energy?

*February 21, 2016*

**Science**

What impact does storage of elastic energy have on the efficiency of hopping?

*February 21, 2016*

**Quick calc question**

Determine the interval on which f(x) = ln(x) is integrable. (0, ∞) [0, ∞) (−∞, 0) U (0, ∞) All reals

*February 16, 2016*

**Quick calc question**

Given that the antiderivative of f of x equals 1 divided by x is F(x) = Ln|x| + C, evaluate the integral from 1 to 2 of the 1 divided by x, dx. ln3 1/2 -1/2 ln2

*February 16, 2016*

**Quick calc question**

Use geometry to evaluate the integral from 0 to 10 of the function f of x, dx for f of x equals 5 for x less than or equal to 5 and equals the quantity 10 minus x for x greater than 5 . 12.5 25 37.5 Cannot be found

*February 16, 2016*

**programming logic and design**

Using pseudocode or a flowchart write a program that does the following: Allow the end user to enter the category the ad will appear in (ex. Automobiles), Number of words and Customer Name Calculate the cost based on 50 cents per word for the first 15 and 25 cents for each ...

*February 15, 2016*

**Quick calc question**

Which of the following definite integrals could be used to calculate the total area bounded by the graph of y = 1 – x2 and the x-axis? the integral from 0 to 1 of the quantity 1 minus x squared, dx plus the integral from 1 to 2 of the quantity 1 minus x square, dx the ...

*February 12, 2016*

**Quick calc question**

If f(x) and g(x) are continuous on [a, b], which one of the following statements is false? the integral from a to b of the sum of f of x and g of x, dx equals the integral from a to b of f of x, dx plus the integral from a to b of g of x dx the integral from a to b of the ...

*February 12, 2016*

**Quick calc question**

Determine the interval on which f(x) = ln(x) is integrable. (0, ∞) [0, ∞) (−∞, 0) U (0, ∞) All reals

*February 12, 2016*

**Quick calc question**

Given that the antiderivative of f of x equals 1 divided by x is F(x) = Ln|x| + C, evaluate the integral from 1 to 2 of the 1 divided by x, dx. ln3 1/2 -1/2 ln2

*February 12, 2016*

**Quick calc question**

Use geometry to evaluate the integral from 0 to 10 of the function f of x, dx for f of x equals 5 for x less than or equal to 5 and equals the quantity 10 minus x for x greater than 5 . 12.5 25 37.5 Cannot be found

*February 12, 2016*

**Quick calc question**

Write the Riemann sum to find the area under the graph of the function f(x) = x2 from x = 1 to x = 5. 1. the summation from i equals 1 to n of the product of the quantity squared of 1 plus 5 times i over n and 4 over n 2. the limit as n goes to infinity of the summation from i...

*February 12, 2016*

**Physics**

Two identical charges repel each other with a force of 10-5 N when they are 20 cm apart. a.) What is the force on each when they are 5 cm apart? b.) When they are 100 cm apart?

*February 12, 2016*

**Quick calc question**

The Riemann sum, the limit as the maximum of delta x sub i goes to infinity of the summation from i equals 1 to n of f of the quantity x star sub i times delta x sub i , is equivalent to the limit as n goes to infinity of the summation from i equals 1 to n of f of the quantity...

*February 11, 2016*

**algebra**

simplify by removing factors of 1: 2p^2+10p+12/4p^2-4p-48

*February 5, 2016*

**Quick calc question**

Use the table below to evaluate the derivative with respect to x of g of f of 2 times x at x = 1. x 1 2 3 4 f(x) 6 1 8 2 f ′(x) 6 1 8 2 g(x) 1 4 4 3 g ′(x) 9 5 5 –4

*January 30, 2016*

**Quick calc question**

For f of x equals the quotient of the quantity 1 minus x and the quantity 1 plus x and g of x equals the quotient of the quantity x and the quantity 1 plus x, find the simplified form for f [g(x)] and state the domain.

*January 30, 2016*

**Quick calc question**

A particle moves on a line away from its initial position so that after t hours it is s = 4t^2 + t miles from its initial position. Find the average velocity of the particle over the interval [1, 4]. Include units in your answer.

*January 29, 2016*

**Quick calc question**

Find the x-coordinates where f '(x) = 0 for f(x) = 2x + sin(4x) in the interval [0, π].

*January 29, 2016*

**Calculus**

Find for dy/dx 4 – xy = y^3.

*January 29, 2016*

**calc**

A particle moves along the x-axis with position function s(t) = e^(cos(x)). How many times in the interval [0, 2π] is the velocity equal to 0? 1 2 3 More than 3< my nswer

*January 28, 2016*

**algebra**

A small garden measures 14 ft by 6 ft. A uniform border around the garden increases the total area to 209 ft2. What is the width of the border?

*January 24, 2016*

**Calculus**

The side of a square is measured to be 10 ft with a possible error of ±0.1 ft. Use differentials to estimate the error in the calculated area. Include units in your answer.

*January 8, 2016*

**Calculus**

Water is drained out of tank, shaped as an inverted right circular cone that has a radius of 16cm and a height of 8cm, at the rate of 4 cm^3/min. At what rate is the depth of the water changing at the instant when the water in the tank is 6 cm deep? Show all work and include ...

*January 8, 2016*

**Calculus**

The position function of a particle in rectilinear motion is given by s(t) = 2t^3 – 21t^2 + 60t + 3 for t ≥ 0. Find the position and acceleration of the particle at the instant the when the particle reverses direction. Include units in your answer.

*January 8, 2016*

**Calculus**

What is the maximum volume in cubic inches of an open box to be made from a 16-inch by 30-inch piece of cardboard by cutting out squares of equal sides from the four corners and bending up the sides? Your work must include a statement of the function and its derivative. Give ...

*January 8, 2016*

**Calculus**

Find the x-coordinates of any relative extrema and inflection point(s) for the function f(x) = 3x^(1/3) + 6x^(4/3). Please use an analysis of f ′(x) and f ′′(x).

*January 8, 2016*

**calc**

Given the position function, s of t equals negative t cubed divided by 3 plus 13 times t squared divided by 2 minus 30 times t, between t = 0 and t = 9, where s is given in feet and t is measured in seconds, find the interval in seconds where the particle is moving to the ...

*January 8, 2016*

**Science**

What's the difference between ambient temperature and body temperature?

*December 16, 2015*

**Mechanical Behavior on Materials / math**

the first one I have: sigma=-(P*l_AB^3)/(3*E*I)

*November 9, 2015*

**Mechanical Behavior on Materials / math**

The television coverage of the World Series showed several remarkable slow-motion views of the deflection of the bat as it hit the ball. Major league wood baseball bats are made of ash. A typical major league bat has a length of 0.95m and a tapering circular cross section. The...

*November 9, 2015*

**Chemistry**

A solution of ammonia and water contains 3.70×1025 water molecules and 7.10×1024 ammonia molecules. How many total hydrogen atoms are in this solution?

*September 9, 2015*

**geometry **

The midpoint of uv is (5 -11). The coordinates of one endpoint are u(3,5). Find the coordinates of endpoint of v.

*September 8, 2015*

**Physics**

After an average acceleration of 3.21 m/s2 during 2.41 s, your car reaches a velocity of 15.9 m/s. Find the car\'s initial velocity.

*September 3, 2015*

**English**

What does the light at the START of the tunnel mean? I know what the light at the end of the tunnel means, that there's always help, but I have no clue what to say for a speech about the light being at the start.

*July 23, 2015*

**Math**

159,103,47,

*June 6, 2015*

**Calculus**

A particle moves along the x-axis with position function s(t) = e^(cos(x)). How many times in the interval [0, 2π] is the velocity equal to 0?

*May 10, 2015*

**chemistry**

In a dry cell, MnO2 occurs in a semisolid electrolyte paste and is reduced at the cathode. The MnO2 used in dry cells can itself be produced by an electrochemical process of which one half-reaction is shown below. Mn2+(aq) + 2 H2O(l) MnO2(s) + 4 H+(aq) + 2 e - If a current of ...

*May 5, 2015*

**chemistry**

If 2.29 mL of a stock solution of acetic acid with a concentration of 0.723 M is mixed with 15.75 mL of water, what is the concentration of the diluted solution?

*May 5, 2015*

**Chemistry**

Someone help me with my titration molarity calculation please!? I have titrated 1.000 mL of Ca(IO3)2 with 2.197 ml of 0.022 M thiosulfate. First I found the moles of thiosulfate present with 0.002197 L x 0.022 M = 4.8388E-5. The mole ratio of S2O3^-2 and IO3- should be 6:1 (...

*April 23, 2015*

**Chemistry**

A solution is prepared by mixing 37.5 mL of 0.20 M (CH3)3N with 50.0 mL of 0.20 M (CH3)3NHC and then diluting the mixture to a total volume of 100.0 mL. Calculate the pH of resulting solution. So far I have been able solve the mols of the two chemicals. (CH3)3N being 0.20M/....

*April 15, 2015*

**chemistry**

It is found that an average volume of 24.25 ml of approximately 0.1 M NaOH is required to reach an endpoint in a titration with 25.00ml of 0.09917 M HCl solution. What is the NaOH concentration? Make sure to give answer to four significant figures.

*March 27, 2015*

**Math**

Is it 8 pails of water?

*March 25, 2015*

**Math**

A custodian pours1/8 gallon of cleaning solution into each pail of water that she uses. how many pails of water and cleaning solution can the custodian make using 16 gallons of cleaning solution?

*March 25, 2015*

**math**

Eric and Frank want to equally share 4/3 feet of rope. What length of rope should each friend get? Explain how to use a drawing to help solve the problem.

*March 17, 2015*

**Math**

A rectangular park has an area of 2_3 square mile. The length of the park is 22_3 the width of the park. What is the width of the park? this is the example of how they want them solving it The width of the room is 5/6 the length of the room. What are the dimensions of Kamal&#...

*March 17, 2015*

**Biology**

Are the p1 and p2 generations pure breeding?

*March 11, 2015*

**Social Studies**

HELP PLEASE!!! How important is India's geography to the beliefs of Hinduism?

*March 9, 2015*

**math**

Explain why an account balance less than -40 dollars represents a debt greater than 40 dollars.

*March 5, 2015*

**math**

Thank you Ms. Sue. I need help with this problem. The surface of Jupiter is made of colorful clouds created by various chemicals in the atmosphere. The temperature at the top of the clouds is -230 degrees F. The temperature below the clouds is 70 degrees F. Which temperature ...

*March 5, 2015*

**math**

lilt saw a jelly fish at 6 feet below sea level. She saw a blue fish at 10 feet below sea level. What is the distance between the blue fish and the jelly fish? Is the answer -4 feet?

*March 5, 2015*

**math**

Nathan deposited 7/9 of his allowance into his savings account. He spent the remaining amount, or $2.50. How much did Nathan deposit into his savings account? Should I multiply 7/9 *2 1/2 or 7/9 * 250

*February 27, 2015*

**Biology - Genetics**

If genes a, b, c, and d are genetically linked to each other, does it follow that a recombination experiment would detect genetic linkage between a and d?

*February 11, 2015*

**Math**

Thank you, Ms. Sue the answers are 3 and 4

*February 10, 2015*

**Math**

Ms. Sue, do you agree with Shimme about my answers

*February 10, 2015*

**Math**

A gallon of gasoline is more than ___ liters but a little less than ___ liters. I think the answers are 4 and 5. Am I correct?

*February 10, 2015*

**math**

In a recent survey 5/8 of pet owners say they allow their pet to go outside. Of these, 1/3 allow their pet outside without supervision. Does 5/8*1/3 express the fraction of the pet owners surveyed that allow their pet outside without supervision? My answer is yes. Did I do good?

*January 29, 2015*

**Math**

true or false- the product of two fractions that are each between 0 and 1 is also between 0 and 1

*January 29, 2015*

**Genetics**

Why are emerging f2 progeny frome crosses one, two, and three should be counted and phenotyped over a period of seven days? I have... for the first say of emergence, cultures produce more females than males. On successive days, the proportion of males increase until the sex ...

*January 28, 2015*

**math**

By what fraction would you multiply 8 1/2 so that the product is about 5? Plesae explain.

*January 25, 2015*

**Finance**

1. Following is the projected net income stream associated with the use of Zartek technology. (Note: this net income stream does not take into account that Zartek’s owners invested $2,000 to develop Zartek in Year 0.) Globus Maximus Enterprises would like to buy the ...

*December 28, 2014*

**Chemistry**

Thank you! I understand all except 2c. I did this way, is it true? M1V1= M2V2 M1= 15 M V1= ? M2= 1/100ml= 10/1000ml = 10 M V2= 100 ml And so I find V1= 67 ml .

*December 4, 2014*

**Chemistry**

My chemistry is bad. I know these are very easy but I cannot solve them . 1. a) Prepare 200 ml of 2 M HCl solution from stock bottle containing 37% w/w HCl and d = 1.2 (g/ml). MWHCl = 36.5 g b) Calculate M of 37% w/w HCl solution? d= 1.2, then solve the above problem 2. a) ...

*December 4, 2014*

**Please help**

I've done a decent job helping my daughter with this stuff, but it's been awhile since I was in school & just can't quite figure it all out.

*November 11, 2014*

**7th grade math**

Two step equations: Vincent started the year with $254 in his account at the health spa. Each time he uses the spa, $15 is taken out of the account. How many more times can he use the spa if he has already had $180 taken out of his account this year? I mostly just need to know...

*November 11, 2014*

**Math 112**

A student finds the value of square root of 3 on a calculator and says that this is the exact value of square root of 3 . How do you respond?

*November 9, 2014*

**Statistics**

Service times for customers at a post office follow some right-skewed distribution with mean 2.91 minutes and standard deviation 1.74 minutes. (a) Can you calculate the probability that the average service time for the next two customers is less than 2.64 minutes? If you can...

*November 4, 2014*

**Statistics**

haha im in your class and same name haha same question too

*November 4, 2014*

**Statistics**

Daily water intake (including water used in drinks such as coffee, tea and juice) for Canadian adults follows a normal distribution with mean 1.86 litres and standard deviation 0.29 litres. (a) Can you calculate the probability that the mean daily water intake for a random ...

*November 4, 2014*

**Calculus**

Find the value of a so that the tangent line to y = ln(x) at x = a is a line through the origin. I am unsure how to go about this.

*October 19, 2014*

**Math**

For f(x) = 2sinx + (sinx)^3 + tanx find f'(pi/3). Ok, so what I tried was... f'(x) = 2cosx + cosx(3(sinx)^2) + (sinx/cosx) pi/3 = (1/2, sqrt(3)/2) therefore, 2(1/2) + 1/2(3(sqrt(3)/2)(sqrt(3)/2) + (sqrt(3)/2 (2/1)) 1 + .5(3 (3/4)) + sqrt(3) 1 + .5(9/4) + sqrt(3) = 4....

*October 19, 2014*

**Calculus**

Ok thank you so much!

*October 19, 2014*

**Physics**

b.) A 33.3 N force is acting on a 285 kg slab. Determine the acceleration of the slab.

*October 2, 2014*

**Math plz check if correct**

B. negative The product of one positive and one negative term is negative. You could try it now, get a calculator and do any positive number times a negative number. Your result will always come out negative.

*August 31, 2014*

**Math check see if i;m coorrect**

Division has 4 parts: divisor, dividend, quotient and remainder. Since remainder is not an option, I would go with D. quotient.

*August 31, 2014*

**Check this please?**

Thank you guys.

*August 31, 2014*

**Check this please?**

I am writing about how different groups view the role of the government. I saw this online and wanted to use it to guide me through my essay, but wanted to check its accuracy because I thought Democrats weren't for higher taxes I thought Republicans were. Those in favor of...

*August 31, 2014*

**Check my answers?**

I am sorry to hear that, I hope things are well between you guys now. And thank you for checking my answers!

*August 30, 2014*

**Check my answers?**

Thank you. Also one more question was, Why did Washington and Nixon both believe that everyone was the loser in this situation? Now I wasn't too sure about this question but I responded with, We disliked both countries for years, and Washington said long ago that if you ...

*August 30, 2014*

**Check my answers?**

The passage: For decades, America has been locked in hostile confrontation with the two great Communist powers, the Soviet Union and the People’s Republic of China. We were engaged with the one at many points and almost totally isolated from the other, but our ...

*August 30, 2014*

**Math**

1 square mile

*August 29, 2014*

**Check my answers?**

Thank you!

*August 29, 2014*

**Check my answers?**

Ok my next guess was going to be C, because in my book it says how in 1981, Reagan he was cutting taxes, and in 1985, the nation was spending half a million dollars every minute on defense and these expenditures contributed to the growing budget deficits. But I wasn't sure...

*August 29, 2014*

**Check my answers?**

During the Reagan years, what happened to the overall course of the budget deficit? A. It rose. B. It fell. C. It increased by about $210 billion D. It increased, then fell back to its original level. I chose C. What was the major cause of deficit increases during the Reagan ...

*August 29, 2014*

**History**

Ok thanks again!

*August 29, 2014*

**History**

Thank you.

*August 29, 2014*

**History**

I already wrote about their economic and political structures I just want to make sure I didn't leave out any places they have settled.

*August 29, 2014*

**History**

Check my answer please I want to make sure I didn't leave something out, I was suppose to explain Spain, France, and England's settlements. In English colonies the earliest settlements were in Virginia and Massachusetts but soon spread all along the Atlantic coast, ...

*August 29, 2014*

**History**

Although settlers valued democracy, they often? A. rejected controls over government B. elected weak legislatures C. disregarded the rights of minorities D. failed to vote I chose D.

*August 28, 2014*

**History**

ok Thank you.

*August 28, 2014*

**History**

Is it because they're resistant to insecticides?

*August 28, 2014*