Sunday

December 4, 2016
Total # Posts: 250

**Physics**

A pipe is open at both ends. The pipe has resonant frequencies of 655 Hz and 786 Hz (among others). Find the two lowest possible values for the length of the pipe. Use c = 343 m/s for the speed of sound. __ m __ m?

*November 18, 2016*

**Math**

What is the product of -1 3/8 and 2 4/5 expressed as a mixed number?

*October 17, 2016*

**Social studies**

Yes, 5 is C.

*October 11, 2016*

**Social studies**

1. yes 2. one is correct, the other isn't 5. no 8. no 9. yes 10. yes

*October 11, 2016*

**Math HELP!**

Use benchmarks to estimate the sum, difference, or product. 1.) 1 7/8 + 1/9 0 1 2 2 1/2 2.) 8 8/9 - 5 1/11 4 5 14 11 3.) 7 2/3 x 3 7/9 2 3/27 11 4/9 28 26/27 21 14/27 4.) Walter had 2/4 yard of string. He used 1/2 of the string for a school project. How many yards of string ...

*October 11, 2016*

**World History**

HYPOTHESISING Describe two inventions that helped spark the Scientific Revolution and their impact?

*September 26, 2016*

**Math**

There is a deck of 12 cards numbered 1 through 12. One card is drawn at random from the deck, look at it and then put it back in the deck. A total of two cards are drawn in this way. Define the following events: • A : get an even numbered card and an odd numbered card ...

*September 20, 2016*

**Math**

Logarithms 3^x-2=18 Work log(3^x-2)=log18 (x-2)log3=log18 xlog3-2log3=log18 x=log3/(log9-log18) e^3x+1=10 lne^3x+1=ln10 3x+1=ln10 I'm stuck here 8^x=5^2x-1 xlog8=(2x-1)log5 xlog8=2xlog5-log5 x=log10/(log5-log8) Are these right?

*September 5, 2016*

**Science work**

A reaction is thought to be second order with respect to the concentration of carbon monoxide. What evidence would support this? Answer options... A. Changing the initial concentration would have no effect on the rate. B. Any change in the initial concentration would cause a ...

*August 18, 2016*

**Pre Cal**

Hi, I've just tried to work through this as you have and am really struggling. When I multiply by (4-7i) I get negative numbers?

*August 17, 2016*

**Pre Cal**

I don't know how do to it. can you explain it to me?

*August 17, 2016*

**Pre Cal**

Simplify the expression in a+bi form. (3+i)(5-2i)(4-7i) a. 67-145i b. 75-123i c. 53-145i d. 61-123i

*August 17, 2016*

**Pre Cal**

Use Descartes’ Rule of Signs to find the number of possible positive, negative, and nonreal roots for the equation, 4x^3+7x^2+7x+3=0 a. 0 positive, 0 negative, 3 non real roots b. 0 positive, 1 or 3 negative, 0 or 2 non real roots c. 0 positive, 1 or 3 negative, 1 or 3 ...

*August 17, 2016*

**math**

the perimeter of a rectangle is 270 meters. find its dimension if the width is 3/4 of its length. <- our teacher gave us that question and whoever gets the correct answer gets extra credit AND I DON'T KNOW HOW TO DO IT HELP

*July 3, 2016*

**math**

Find all points (x,y) that are 13 units away from the point (2,7) and that lie on the line x - 2y = 10. Give your answer as a list of points separated by semicolons, with the points ordered such that their x-coordinates are in increasing order. So "(1,-3); (2,3); (5,-7)&...

*April 12, 2016*

**chemistry**

what is the approximate volume of gas in a 1.50 mol sample that exerts a pressure of 0.922 atm and has a temp of 10.0°C?

*April 6, 2016*

**chemistry**

A sample of gas at 42°C has a volume of 5.2 L and exerts a pressure of 1.00 atm. How many moles of gas are in the sample?

*April 6, 2016*

**Chemistry**

Please help?

*April 5, 2016*

**Chemistry**

What's the best way to calculate the answer with those values? I don't understand.

*April 5, 2016*

**Chemistry**

Oops, sorry. The Ksp for Al(OH)3 is given as 4.6×10^–33 and the Ksp for Pb(OH)2 is given as 1.43×10^–20.

*April 5, 2016*

**Chemistry**

Suppose a solution contains 0.21 M Pb2 and 0.41 M Al3 . Calculate the pH range that would allow Al(OH)3 to precipitate but not Pb(OH)2.

*April 5, 2016*

**Math**

How do i take out 2 or solve from: y=(2theta + pi)+3 Because i need to find the mathematical changes in the graph but i can't figure it out?

*March 2, 2016*

**Chemistry**

A 0.10M solution of a certain monoprotic weak acid has a pH of 2.44. Calculate Ka.

*March 1, 2016*

**Math**

Mrs. Walter buys 30 square feet of outdoor carpeting for her patio. If one side of the carpet is 6 feet, what is the length of the adjacent side?

*February 3, 2016*

**Math **

Mrs. Walter buys 30 square feet of outdoor carpeting for her patio. If one side of the carpet is 6 feet, what is the length of the adjacent side?

*February 3, 2016*

**World History**

HYPOTHESISING Describe two inventions that helped spark the Scientific Revolution and their impact

*January 28, 2016*

**Science physic**

What is the magnitude of the average force thet the athele exterts on a landing pad if it's 1.5 m high and deforms by 0.5 Mass of athele= 60kg Centre of mass is 1m

*January 21, 2016*

**physics**

When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1250 kg automobile traveling at 37.2 m/s comes to a halt after its brakes are applied, how much can the ...

*January 5, 2016*

**physics**

A 3.5 kg rock is initially at rest at the top of a cliff. Assuming the rock falls into the sea at the foot of the cliff and that its kinetic energy is transferred entirely to the water, how high is the cliff if the temperature of 0.88 kg of water is raised 0.10°C? (Neglect...

*January 5, 2016*

**Social Studies**

pro-french ideas

*December 4, 2015*

**physics**

What would be the orbital speed and period of a satellite in orbit 1.50 ✕ 10^8 m above the Earth?

*November 18, 2015*

**Physics**

The gravitational force of attraction between two students sitting at their desks in physics class is 2.23 ✕ 10-8 N. If one student has a mass of 52.0 kg and the other student has a mass of 57.4 kg, how far apart are the students sitting?

*November 18, 2015*

**Physics**

Tarzan tries to cross a river by swinging from one bank to the other on a vine that is 11.2 m long. His speed at the bottom of the swing is 7.0 m/s. Tarzan does not know that the vine has a breaking strength of 1.0 ✕ 103 N. What is the largest mass that Tarzan can have ...

*November 18, 2015*

**physics**

The bird perched on the swing shown below has a mass of 41.6 g, and the base of the swing, y = 7.88 cm below the hook, has a mass of 147 g. The swing and bird are originally at rest, and then the bird takes off horizontally at 1.94 m/s. How high will the base of the swing rise...

*November 8, 2015*

**Art help me please i need it soon**

thank you if i get it wrong I'm going to blame you though

*November 5, 2015*

**Art help me please i need it soon**

i chose it because i know its not a or b and c it says perspective and my definition of perspective is giving the illusion of depth and there isn't much depth in this piece of art work what do you think it is

*November 5, 2015*

**Art help me please i need it soon**

sorry i mean proportion

*November 5, 2015*

**Art help me please i need it soon**

haystacks in brittany by paul gauguin the artis most obviously showed experimentation through his use of perspective texture *** color line Achille de gas in the uniform of a cadet how was portion used in this image to create a mood of tranquility to create an optical illusion...

*November 5, 2015*

**ART CHECKING!!! PLEASE CHECK IT!!! :(**

you test said 7 was A mine said 7 was C weird to you go to connections 8th grade what state do you do

*November 5, 2015*

**ART CHECKING!!! PLEASE CHECK IT!!! :(**

whats number 7 and number 10 help please i am in a serious need

*November 5, 2015*

**ART CHECKING!!! PLEASE CHECK IT!!! :(**

so what were the answers

*November 5, 2015*

**Math**

THANKS YOU SO MUCH!!!!!!!

*October 10, 2015*

**Math**

In a figure, the radius of the inner circle of the tire is twice the width of the tire itself. To the nearest integer, what percent of the entire area is the area of the tire? My teacher told me the answer is 56%, by rounding the 55.5555...., but I don't understand how to ...

*October 10, 2015*

**What did I did wrong MATH**

The ratio of number of one-dollar coins to the number of fifty-cent coins in a box was 3:4. Six one-dollar coins were removed and some fifty-cent coins if the same amount were added. The ratio of the number of one-dollar coins to the number of fifty-cent coins to the number of...

*July 30, 2015*

**math**

THANKS

*July 29, 2015*

**math**

Someone help please!!!!

*July 29, 2015*

**math**

Eric is planning a 7-day resort vacation. He will play golf on four mornings. He also wants to play tennis but can only play tennis on days he does not play croquet. He will play croquet on any day immediately following a day that he plays golf. What is the greatest number of ...

*July 29, 2015*

**Physics**

A particle starts from the origin at t = 0 with an initial velocity of 4.8m/s along the positive x axis.If the acceleration is (-2.5 i^ + 4.3 j^)m/s2, determine (a)the velocity and (b)position of the particle at the moment it reaches its maximum x coordinate Express your ...

*March 28, 2015*

**chemistry**

Trying to calculate atoms of O in 2.00 moles of H3PO4.I used 2.00 mol h3po4÷4atoms O then × by 6.022 avrogados# My answer 3.011×10^23

*March 25, 2015*

**Career Explorations**

Caroline is in JROTC (Junior Reserve Officers’ Training Corps), which is an extracurricular program that trains and prepares students for becoming officers in the armed forces. Since she wants to join the Army after high school, this extracurricular activity is mostly ...

*March 18, 2015*

**chemistry**

how are moles and molarity related to volume? is it molx molarity or mol/molarity to get volume?

*November 18, 2014*

**chemistry**

The mass of solute per 100 mL of solution is abbreviated as (m/v). Mass is not technically the same thing as weight, but the abbreviation (w/v) is also common. How many grams of sucrose are needed to make 655 mL of a 36.0% (w/v) sucrose solution?

*November 17, 2014*

**chemistry**

What mass of precipitate will form if 1.50 L of concentrated Pb(ClO3)2 is mixed with 0.150 L of 0.190 M NaI? Assume the reaction goes to completion.

*November 17, 2014*

**Science Help!**

if you don't use your real name how do they now who's on here

*November 12, 2014*

**Chemistry **

What would cause the molecules of gas to get closer together?

*November 10, 2014*

**social studies**

some people use this site to actually help us learn so everyone get your pain ties out of a twist and help each other out this is ridiculous

*October 20, 2014*

**Language Arts**

B C C Is Correct Thank You!!

*September 22, 2014*

**Chemistry**

Please Help! Describe how water could be classified as either an acid or a base. Give an example of each (acid and base). What word describes substances that can be classified as acids or bases?

*May 8, 2014*

**chemistry**

aspirin is synthesized through the following reaction C7H603+C4H6O3=C9H8O4=HC2H3O2 a)Assuming the maximum yield that could be obtained is 76.8% what mass of Aspirin C9H8O4 could be obtained from this reaction when 2.00 * 10^2 grams of C7H6O3 reacts with 145.30 grams of C4H6O3...

*April 24, 2014*

**chemistry**

what is the theoretical yield

*April 24, 2014*

**chemistry**

Methanol CH3Oh can be produced by reacting carbon monoxide and hydrogen gas in the presence of a catalyst. If 75.00 grams of carbon monoxide reacts with 106.3 grams of hydrogen, 68.40 grams of methanol are produced. What is the percent yield of methanol? can someone help me ...

*April 24, 2014*

**Health**

There are ________ of muscles that are responsible for chewing movements or mastication.

*March 19, 2014*

**English**

Is this correct? The Iowa Senate approved the state lottery bill in a close vote taken this morning.

*February 24, 2014*

**English**

Need help changing passive voice to an active one.... Iowa’s state lottery bill was approved by the Senate in a close vote taken this morning.

*February 24, 2014*

**Geometry**

Describe the rotation and reflection symmetries in the Maple Leaf of Canada and the "Life" Ancient Egypt cross.

*November 25, 2013*

**Chemistry**

16g na+ (aq)

*October 19, 2013*

**CHEM 101**

What volume of a 0.726 M sodium hydroxide solution is required to neutralize 24.6 mL of a 0.298 M hydrobromic acid solution ?

*October 8, 2013*

**Sociology**

1. The express purpose of dating is eventual marriage. (Points : 1) True False Question 2. 2. Anticipatory socialization is learning the rights, obligations and expectations of a role in preparation for assuming that role at a future date. (Points : 1) True False Question 3. 3...

*September 17, 2013*

**Math**

Simplify (tan 4X+tan 2x)/(1-(tan 4X)(tan2X))

*September 6, 2013*

**Math**

Find the original price for a kitchen table and chairs selling for $799.99 at 40% off. Round to the nearest dollar

*September 1, 2013*

**life orientation**

provide recommendations on how to address ill health

*July 17, 2013*

**Chemistry**

I've calculated my % yield for 2 experiments, the second one using the final product of the first one. How would I calculate the "total % yield" like my T.A. wants? Would I just add both percentages up and divide by 200?

*July 17, 2013*

**life orientation**

money

*May 21, 2013*

**pre- algebra**

what is the simplest form ? 50x to the 4th over 12x

*April 15, 2013*

**Computer Programming**

Draw a structured flowchart and write pseudocode that describes the process of looking up a word in a dictionary.

*January 23, 2013*

**IT**

How would I write pseudocode that describes the process of looking up a word in the dictionary?

*January 23, 2013*

**science**

How can I find the physics behind why a wheel moves faster or slower than other wheels? Is this friction?

*January 16, 2013*

**HELP PLEASE!!!!!**

The cowboy rides into town on Tuesday and stays for three days then leaves on Tuesday how is this possible?

*January 7, 2013*

**Science**

what is the most common mineral?

*December 11, 2012*

**science **

what is an ion?

*December 11, 2012*

**science**

what is an isotope?

*December 11, 2012*

**science**

how are the elements on the periodic table organized?

*December 11, 2012*

**science **

where does bonding occur in an atom?

*December 11, 2012*

**Science**

where are electrons located on an atom?

*December 11, 2012*

**Science**

What is the most common state of matter?

*December 11, 2012*

**Science**

atomic # 5 atomic mass 10.81

*December 10, 2012*

**SCIENCE**

Thanks Mrs.Sue

*December 10, 2012*

**SCIENCE**

WHAT IS THE PURPOSE OF LIFE?

*December 10, 2012*

**Math**

Let f(x) = x - 5 and g(x) = 1/2x^3. Find g^-1(108). Write an expression for (f•g)(x). Solve equation (f•g)(x)= 27.

*December 9, 2012*

**Darin**

a teacher knows that 80 percent will score no more than 5 points above or below the class average 85 percent on the test which inequality represents the test score of 80 percent of her student.

*November 30, 2012*

**math**

how do u do B?

*November 14, 2012*

**Lang Atrs**

3. Read the following lines from “Fable for When There’s No Way Out”: “Despair tempts him / to just go limp.” What is the best interpretation of these lines? a. The chick is angry at how difficult it is to break free from his shell. b. The chick is so ...

*November 7, 2012*

**math**

Mary has 6 more pennies than Andy has. Together they have 28 pennies. How many pennies does each person have?

*November 3, 2012*

**physics**

A 45 g superball traveling at 28.0 m/s bounces off a brick wall and rebounds at 24.5 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3.60 ms, what is the magnitude of the average acceleration of the ball during this time interval? (Note...

*August 17, 2012*

**geometry**

Find the measure of 7.measure of angel 7=2x+15.measure. Of 8=3x

*April 15, 2012*

**geography**

thank you so much drwls

*April 9, 2012*

**geography**

I think the density of the iceberg is 900 kg/m^3. So how would I set up the problem to solve it?

*April 9, 2012*

**geography**

calculate the freeboard of a 10-m thick iceberg in saltwater (seawater density of 1025 kg/ m^3)

*April 9, 2012*

**U.S History**

thanks, anything else?

*March 26, 2012*