Tuesday

February 21, 2017
Total # Posts: 76

**Physics**

Please help me! 1) Karen shouts across a canyon and hears an echo 5.7 s later. How wide is the canyon? The speed of sound is 343 m/s. Answer in units of m. 2) The distance between two consecutive nodes of a standing wave is 16.8 cm. The hand generating the pulses moves up and ...

*February 15, 2017*

**math**

suppose your friends parents invest 20,000 in an account paying 7% compounded annually what will the balance be after 6 years

*February 3, 2017*

**Physics**

I am really struggling with these 2 questions. Please help! 1)Mars has a mass of about 6.91 × 1023 kg, and its moon Phobos has a mass of about 9.8 × 1015 kg. If the magnitude of the gravitational force between the two bodies is 4.87 × 1015 N, how far apart ...

*January 22, 2017*

**Physics**

Please help! 1) While skiing in Jackson, Wyoming, your friend Ben (of mass 73.8 kg) started his descent down the bunny run, 23.9 m above the bottom of the run. If he started at rest and converted all of his gravitational potential energy into kinetic energy, what is Ben’s...

*December 7, 2016*

**Physics**

I am really struggling with these two questions. Please help! 1)Two ice skaters approach each other at right angles. Skater A has a mass of 61.2 kg and travels in the +x direction at 2.25 m/s. Skater B has a mass of 66.2 kg and is moving in the +y direction at 1.3 m/s. They ...

*December 7, 2016*

**Physics Urgent!**

Please help! This is due in three hours and I don't know how to do these! 1.A block accelerates at 3.1 m/s2 down a plane inclined at an angle 24.0?. Find ?k between the block and the inclined plane. The acceleration of gravity is 9.81 m/s2 . 2.Two blocks connected by a ...

*November 3, 2016*

**Physics**

1. A snowboarder of mass 60 kg is at rest on the top of a sand dune. The coefficients of static and kinetic friction are 0.55 and 0.4675, respectively. 60 kg ?k = 0.4675 ?s = 0.55 What is the angle the incline must exceed so that the snowboarder starts sliding? The...

*November 3, 2016*

**Physics**

A 1200 kg car moves along a horizontal road at speed v0 = 20.1 m/s. The road is wet, so the static friction coefficient between the tires and the road is only ?s = 0.189 and the kinetic friction coefficient is even lower, ?k = 0.1323. The acceleration of gravity is 9.8 m/s2 . ...

*November 2, 2016*

**Physics Urgent!**

A snowboarder of mass 60 kg is at rest on the top of a sand dune. The coefficients of static and kinetic friction are 0.55 and 0.4675, respectively. 60 kg ?k = 0.4675 ?s = 0.55 What is the angle the incline must exceed so that the snowboarder starts sliding? The ...

*November 2, 2016*

**Physics Urgent!**

1.You are driving at the speed of 28.7 m/s (64.2138 mph) when suddenly the car in front of you (previously traveling at the same speed) brakes. Considering an average human reaction, you press the brakes 0.427 s later. Assume that the brakes on both cars are fully engaged and ...

*November 2, 2016*

**Physics**

Thank you! That makes much more sense!

*November 2, 2016*

**Physics**

A hockey puck is hit on a frozen lake and starts moving with a speed of 12.1 m/s. Four seconds later, its speed is 6.7 m/s. What is its average acceleration? The ac- celeration of gravity is 9.8 m/s2 . Answer in units of m/s2. What is the average value of the coefficient of ...

*November 2, 2016*

**Physics**

A 83.0-kg person, hanging from a rope, is being pulled away from a burning building by a firefighter, as shown in the figure below.

*October 23, 2016*

**math 7+**

Trevor's sister is 1/8 the height of a 40-foot dinosaur. She is A. 6 feet tall B. 5.5 feet tall C. 5.3 feet tall D. 5 feet tall So that is my homework question i don't understand how to make a propotion to answer the question.

*December 15, 2015*

**Algebra**

Consider the following polynomial function F(x)=-2x^3-x^2+13x-6 to answer the following question. If (x+3) is a factor of f(x) rewrite f(x) in completely factored form and identify the zeros f(x).

*November 5, 2015*

**history**

What did the Judiciary Act of 1789 establish? How was this a compromise?

*October 29, 2015*

**Earth Science**

did you ever get answers?

*October 21, 2015*

**World History**

the correct answer is A just got my paper graded and the correct answer is A for those of you needing the correct answer pick A the reason as to why it wouldn't be C is because it is often difficult to distinguish fact from opinion because opinion is presented as fact too ...

*August 5, 2015*

**math**

Plz hurry for my answer I have a final exam tommorow and I wanna be ready plz

*June 9, 2014*

**math**

I need help explaing percentage s to my daughter such as a bike cost $250 but it is on sale for%25 off

*June 9, 2014*

**History**

i agree brianna

*May 5, 2014*

**Physics**

Consider a simple frictionless roller-coaster. It begins at x = 0, at a height of y = H. Then it drops into a dip, reaching a minimum at x = 100, with zero height (y = 0). Finally, it goes back up at x = 200, but only reaches a height of y = H/2. Assume the roller-coaster car ...

*March 12, 2014*

**Chemistry**

Balance KCLO3 ---> KCl + O2

*January 22, 2014*

**Algebra 1**

solve the inequality -3n<81

*January 18, 2014*

**math**

i have the same question as gabe

*December 2, 2013*

**Math**

if pencils cost 20 cents and pens cost 30 cents how much does r pens and p pencils cost? please help.

*August 21, 2013*

**Math**

if pencils cost 20 cents and pens cost 30 cents each how much does it cost for p pencils?

*August 21, 2013*

**math**

A.) graph the quadrilateral with the end points A(6,5), B(-3,-1), C(-1,-4) and D(8,2) B.) what type of quadrilateral is ABCD? use slope to justofy your answer Can someone please help me with ASAP thank you so much

*June 14, 2013*

**Physics**

Take an average 82 kg pet frog, what's it weight on earth? What is it's weight on the moon?

*May 20, 2013*

**physics**

the sounds of a cricket gets stronger as you get closer to it. if you get twice as close, how much louder will the sound be?

*April 4, 2013*

**Plz help math**

3n/(n2 -7n + 10) - 2n/(n2-8n+15)

*March 15, 2013*

**Help! stuck on this math question**

3n/(n^2 -7n + 10) - 2n/(n^2-8n+15)

*March 14, 2013*

**algebra 2**

3n/(n2 -7n + 10) - 2n/(n2-8n+15)

*March 14, 2013*

**science**

Th thermosphere is 415km deep. What percent of the atmosphere made up by the thermosphere if the total atmosphere extends 500km.

*January 24, 2013*

**statistics**

Use your data to make a frequency table by age, with 7 classes, starting at age 10 with a class width of 10.

*October 3, 2012*

**math**

The equation for: Judy and Linda agree to share the cost of a $21 pizza based on how much each one ate. If Judy ate 3/4 of the amount that Linda ate, how much should each pay? what is the formula please.

*September 9, 2012*

**Math**

Do your own homework. How do you think your learning if your copying from someone else. For one that is plagarisying and rude. You will never learn if you don't study and answer from your own brain. I've seen over 50 questions from just you. Seems to me like you don&#...

*September 5, 2012*

**Chemistry**

What concentration of aqueous NaOH solution freezes at negative 3.2 degrees celsius ?

*June 17, 2012*

**English Help**

Write the plural possessive form of each noun for questions 1–3 1. friend 2. box 3. house

*May 22, 2012*

**Algebra**

the denominator of a fractio is an integer that is one greater than the numerator. A second fraction is the reciprocal of the integer that is one less than the numerator of the first fraction. If the product of the two fraction is 3/8 identify the first fraction.

*February 11, 2012*

**algebra**

a trip of 120 miles required 7 gallons of gas. at this rate how many gallons would be needed at 180?

*February 7, 2012*

**chemistry**

whcih of the folllowing values is the amount of sodium nitrate that can be dissolved in 100mL of water of 40 degrees celcius? A- 0g B-40g C-100g D-130g

*November 28, 2011*

**IPS**

If I have 1.9 g of sulfur and need to do three trials using 0.030 mol of S each time, how do I find out if I have enough sulfur?

*October 12, 2011*

**Math**

The areas of two adjacent squares are 256 square inches and 16 square inches, respectively, and their bases lie on the same line. What is the number of inches in the length of the segment that joins the centers of the two inscribed circles? Express your answer as a decimal to ...

*April 23, 2011*

**physics**

it does not exist.

*January 24, 2011*

**chemistry**

what would be the amount of water that would be formed during the complete combustion of propane in the presence of excess oxygen?

*January 12, 2011*

**5th Grade Math**

Which ones are prime numbers. 43, 87, 59, and/or 73.

*October 13, 2010*

**5th Grade Math**

What is the communitive property.

*September 22, 2010*

**Language Arts**

sorry miss sue i made that mistake

*August 31, 2010*

**Language Arts**

Find one error. Window comes from one word that means "wind" and another that means "eye' We buy windows to keep an eye on the wind. We also use them to keep heat in when it's cold out side.

*August 31, 2010*

**4th grade math**

Sunbeam's group of close friends are going to fifth grade in September. All are going to Highway elementary school and their home rooms will be 12,14,or 16. All of her friends but 4 are going to room 12, all but 4 are going to room 14, and all but 4 are going to room 16. ...

*April 22, 2010*

**math 4th grade**

Leah liked to balance objects she found around the house using the science kits she got for Christmas. She found that 3 identical apples and a 5-gram weight exactly balanced with a 50-gram weight.Leah said she could tell how much each apple weighed by solving the equation 3a+5...

*April 15, 2010*

**Math**

You are playing a card game with a full deck of 52 cards. You win if you draw a red card that is a multiple of 5. What are your chances of winning on the first draw?

*April 15, 2010*

**math 4th grade**

3/50,3/7,3/4,3/3,3/2

*April 13, 2010*

**history**

Compare the colonial empires of Spain, France and England in terms of their settlements, economic structure and political control.

*March 16, 2010*

**Social Studies**

So far this semester, we have discussed topics such as Nationalism, Industrialization, the Rise of Democracy, and the effects of Imperialism. Use those topics to create a response to the following question: To what degree should European modernization be praised or condemned?

*March 9, 2010*

**Social Studies**

To what degree should European modernization be praised or condemned?

*March 9, 2010*

**social studies**

what was an assyrian attack like?

*January 20, 2010*

**scientist**

EXPLAIN WHAT HAPPENS TO A ROCK AFTER THEIR ELASTIC LIMIT IS PASSED.

*January 20, 2010*

**10th grade English**

I'm writing an essay for English class. I was just wondering if somebody could read over this sentence and tell me whether or not it sounds alright. Everybody wants to be happy, but we often forget how easy it can be to attain hold of that happiness due to tragedies in our...

*November 22, 2009*

**speech28394691283741290**

what does a speech need in order to do it in front of a press?

*October 16, 2009*

**Pre-Algebra**

its ok i cant figure it out i really hate algebra

*September 15, 2009*

**Pre-Algebra**

it is about math in algebra i don't know why but it is my teacher is wierd

*September 15, 2009*

**Pre-Algebra**

What do they call the International Hula Hoop Championships?

*September 15, 2009*

**7th grade**

how is that math?

*September 15, 2009*

**4th grade**

break up these two words into syllables? COAST ODD

*September 15, 2009*

**7th grade Pre-Algebra**

8(-5)=-40 i hate pre-algebra

*September 14, 2009*

**science**

Suppose you are testing the boiling temperature of several liquids. How would you use numbers during your investigation?

*September 10, 2009*

**3rd grade science**

What property does the waterproff synthetic material share with the water lillies' leaves?

*October 16, 2008*

**Georgia Studies**

In what way did colonists particate in governing themselves after Georgia became a royal colony?

*October 16, 2008*

**7th grade math(the metric system)**

Is the metric system (SI) better than the english system? why and why not?

*September 9, 2008*

**Algebra**

Expressions with Multiplication & Division. Evaluate each each expression for x = 3 7x ? 18/x ?

*March 18, 2008*

**author**

In tale of two cities, what does noisiest authorities mean?

*March 11, 2008*

**physics**

the sounds of a cricket gets stronger as you get closer to it. if you get twice as close, how much louder will the sound be?

*July 12, 2007*

**calc**

find the area between the x-axis and the graph of the given function over the given interval: y = sqrt(9-x^2) over [-3,3] you need to do integration from -3 to 3. First you find the anti-derivative when you find the anti-derivative you plug in -3 to the anti-derivative and ...

*April 18, 2007*

**Math**

Which is True? A 3/5 > 1/2 B 1/2 < 4/9 C 5/11 > 1/2 D 1/2 > 5/8 How do I determine? Thanks for the help! The shortcut for doing these is as follows: Cross-multiply by multiplying the numerator of the first times the denominator of the second. Then multiply the ...

*February 18, 2007*

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