Thursday

April 28, 2016
Total # Posts: 657

**Physics - please help me..**

A 395.0 g block is dropped onto a vertical spring with a spring constant k = 252.0 N/m. The block becomes attached to the spring, and the spring compresses 0.29 m before momentarily stopping. While the spring is being compressed, what work is done by the block's weight? ...
*December 31, 2013*

**physics**

A 395.0 g block is dropped onto a vertical spring with a spring constant k = 252.0 N/m. The block becomes attached to the spring, and the spring compresses 0.29 m before momentarily stopping. While the spring is being compressed, what work is done by the block's weight? ...
*December 30, 2013*

**Physics Help..**

Thank you sooo much!
*December 30, 2013*

**Biology**

***I read the textbook assignment and I have read all the information on the lesson, however I cannot find the answer to this question. Nor can I find anything written about it anywhere in the lesson. Please help a girl out.*** True or False? There are many origins of ...
*December 19, 2013*

**Physics! Please help! :)**

A concave mirror with a radius of curvature of 0.61 m is illuminated by a candle located on the symmetry axis 2.61 m from the mirror. Where is the image of the candle? Answer in units of m
*November 20, 2013*

**physics**

A concave mirror with a radius of curvature of 0.61 m is illuminated by a candle located on the symmetry axis 2.61 m from the mirror. Where is the image of the candle? Answer in units of m.
*November 20, 2013*

**Chem**

Please help I have no idea how to do this. There are three different dichloroethylenes (molecular formulaC2H2Cl2), which we can designate X, Y, and Z. Compound X has no dipole moment, but compound Z does. Compounds X and Z each combine with hydrogen to give the same product: ...
*November 12, 2013*

**English**

Which words in the sentence make up the adjective phrase? Which word does the adjective phrase modify? The image on the previous page shows an outdoor mural that he painted. A. an outdoor mural; modifies shows B. on the previous page; modifies image C. the image; modifies ...
*November 5, 2013*

**college Algebra**

Reiny is right, this formula can't be right. Raising it to the power of x makes more sense.
*November 4, 2013*

**college Algebra**

Replace x with 50 and then multiply 78.5 x 1.001 x 50 to get your answer.
*November 4, 2013*

**Math**

Solve the system of equations. 2x - 4y = 3 -3x + 5y = 1
*October 25, 2013*

**physics**

A softball player hits the ball and starts running towards first base. Draw a motion diagram, using the particle model, showing her position and her average velocity vectors for the first few seconds of her run.
*August 30, 2013*

**51**

51
*August 8, 2013*

**geometry**

RS=8y+4 ST=4y+8 RT=15y-9 a.) what is the value of y? b.)find RS, ST, AND RT
*August 7, 2013*

**Math**

A corporation has 7 members on its board of directors. How many different ways can it elect a president, vice president,secretary, and treasurer?
*July 29, 2013*

**chemistry**

If you have 156g of SO2, how many molecules do you have?
*July 10, 2013*

**statistics**

the probability that a football game will go into overtime is 17%. In 240 randomly selected football games, what is the mean and the standard deviation of the number that went into overtime
*June 23, 2013*

**Writing **

can you check my grammar and spelling? and does it look better? Erin Oldham Calvin Brown 20 March 2013 ASL 2 ASL 2 Research paper I am writing about interviewing three Deaf Persons for my ASL research paper. The first person I interviewed is Christian DeGuzman. He has been ...
*May 18, 2013*

**math**

A hot air balloon descends at a rate of 320 feet per minute for 3 minutes. Whats the balloons total change in altitude?
*May 17, 2013*

**Social Studies**

The spread of the factory system resulted in: A. an increase in home production B. increased exports of British cotton good C. poorer quality of iron D. improved working conditions in factories. The industrial Revolution created new jobs in all of the following expect: A. ...
*May 14, 2013*

**Social Studies**

Which of the following contributed to Britain's Industrial Revolution? A. Large Labor force C. powerful monarchy B. Decreasing food supplies D. decreasing money supply. The textile industry met its last major challenge to full mechanization with the development of ? A. a ...
*May 14, 2013*

**statistics**

Consider a normal distribution with mean 20 and standard deviation 3. What is the probability a value selected at random from this distribution is greater than 20?
*May 12, 2013*

**Early Childhood**

For my early childhood education final exam/Ideas? My teacher said i have to create my child and choose 1 out? For my early childhood education final exam/Ideas? My teacher said i have to create my child and choose 1 out of 5 (ADHD,Aspergers syndrome, Cerebral Palsy, and ...
*May 9, 2013*

**organic chemistry isomers**

which of the following molecules has a conformational isomer? CHCH CH2CH2 CH3CH2CH2CH3 CH2CCCH2 I think its either 2 or 4 but leaning towards 4. I just need help being more confident in my answer.
*April 26, 2013*

**Chemistry**

1. Calculate the pH of a buffer solution that contains 0.32 M benzoic acid (C6H5CO2H) and 0.17 M sodium benzoate (C6H5COONa). [Ka = 6.5 × 10-5 for benzoic acid] Round your answer to two places past the decimal. 2. A solution is prepared by mixing 470 mL of 0.18 M Tris&...
*April 8, 2013*

**Chemistry**

1. Calculate the pH of a buffer solution that contains 0.32 M benzoic acid (C6H5CO2H) and 0.17 M sodium benzoate (C6H5COONa). [Ka = 6.5 × 10-5 for benzoic acid] Round your answer to two places past the decimal. 2. A solution is prepared by mixing 470 mL of 0.18 M Tris&...
*April 8, 2013*

**grammar English**

I am writing about interviewing Deaf Persons for my ASL research paper. The first person is Christian DeGuzman. He is profoundly deaf since birth, and about 2 or 3 years old later they found out that he was deaf that’s why. Christian grew up in Bay Area, went to ...
*April 6, 2013*

**Honors Chemistry**

what volume of solution does a 3.0 molar solution need to have in order to contain 1.8 moles of sodium sulfate?
*April 3, 2013*

**English**

Please help me!
*April 2, 2013*

**English**

American Life, stereotypes? Just like television, commercial, etc. When we are watching TV, it gives us a "snapshot" of American life. If you look at the commercials alone, what would this tell you about how we live? I ask you to pretend that you are from another ...
*April 2, 2013*

**Math**

Please help! 1. A taxi cost $2.25 for the first mile plus .15 for each additional tenth of a mile. For a 5.2 mile trip Eric paid $10 and told the driver to keep the change. How much was the drivers tip? 2. 2 trillion is how much more than seven hundred fifty billion. Write the...
*April 1, 2013*

**Physics please help!!**

A cart of mass M1 = 5.00 kg and initial speed = 3.00 m/s collides head on with a second cart of mass M2 = 3.00 kg at rest. Assuming that the collision is elastic, find the speed of M2 after the collision. I have tried the answer 5.0 m/s however it says it is wrong. Please help!
*March 23, 2013*

**english romeo and juliet**

I am writing an essay which has to have 3 character traits of romeo and 2 quotes to support each trait. I still need quotes for impulsive and fearless. Can you please help?
*March 20, 2013*

**Math**

Thank you
*February 25, 2013*

**Math**

You have 34 math and science problems for homework. You have 10 more math problems then science, how many of each do you have?
*February 25, 2013*

**Math**

Factor the polynomial 4x^2- 81
*February 25, 2013*

**Physics**

A bicycle wheel of radius 0.30 m is spinning at a rate of 60 revolutions per minute. What is the centripetal acceleration of a point that is 0.11 m from the outer edge of the wheel?
*February 17, 2013*

**maath HELPPPP**

a ball is thrown into the air at a speed of 96 feet/sec. The equation that expresses the height of the ball as a function of time is: h(t) = -16t2 + 96t + 5 How long does the ball stay in the air after it is thrown? (Round answer to the hundreths of a second)
*February 14, 2013*

**math **

a ball is thrown into the air at a speed of 96 feet/sec. The equation that expresses the height of the ball as a function of time is: h(t) = -16t2 + 96t + 5 How long does the ball stay in the air after it is thrown? (Round answer to the hundreths of a second)
*February 14, 2013*

**Languege arts**

1. Which is the BEST summary of "LAFFF"? (1 point) Angela used a time machine to win a writing contest. Peter and Angela invented a time machine. Peter used a time machine to travel to the future. 2. The author describes Peter's Halloween costume in order to (1 ...
*February 7, 2013*

**Physics**

It's definitly 1J
*January 23, 2013*

**math**

The area of a parallogram is 128 sq miles . Find its base &height . 2x-4. 2x+ 4
*January 23, 2013*

**math**

What is a negative 588 divided by two numbers that equal the sum of 7?
*January 23, 2013*

**help math**

A boat travels down the river in 3.0 hours. The return trip up river takes 3.6 hours. A one way trip down or up river is a distance of 23 miles. If the boat is traveling at maximum speed, what is the boats speed measured in waters with no current? You need to use systems to ...
*December 17, 2012*

**math quick help**

Bernie put in a garden in her back yard. The garden has a perimeter of 195 feet. She wants to know the total surface area of the garden and all she knows is the perimeter and that the width is 20% or (1/5) of the length. (Remember 20% and the fraction 1/5 is the same decimal ...
*December 17, 2012*

**help mathhh!!!**

which one would represent the water with no current?
*December 13, 2012*

**help mathhh!!!**

A boat travels down the river in 2.3 hours. The return trip up river takes 3.7 hours. A one way trip down or up river is a distance of 26 miles. If the boat is traveling at maximum speed, what is the boats speed measured in waters with no current? You need to use systems to ...
*December 13, 2012*

**math (precalc)**

Point S is 4 km west of point R, and point T is 4 km southwest of S. Find the bearing and distance from R to T. (If possible, show diagrams too, please! Thanks in advance.)
*December 13, 2012*

**Math**

Sue was in excellent shape in high school, she could ride her 10-speed bicycle 4.8miles to her grandmother's house in 11 minutes. Her return trip home took 14 minutes. The times are different due to there being a slight downhill slop on part of the trip to her grandmothers...
*December 9, 2012*

**Math**

How do you set this up? Solve the system using substitution: A boat travels 18 miles downstream in 1.5 hrs. It then takes the boat 3 hrs. to travel upstream the same distance. Find the speed of the boat in still water and the speed of the current. Thanks you!!!
*December 6, 2012*

**Chemistry**

What type of bonds(sigma or pi) and how many of each are used to form a triple bond?
*December 3, 2012*

**chemistry**

what theory describes how negatively charged electron orbitals orient around a positvely charged nucleus?
*December 3, 2012*

**English**

"I watched Hassan get raped," I said to no one. Baba stirred in his sleep. Kaka Homayoun grunted. A part of me was hoping someone would wake up and hear, so I wouldn't have to live with this lie anymore. But no one woke up and in the silence that followed, I ...
*December 2, 2012*

**English**

Sorry, "dozed" should be "dozen" in the quote .
*December 2, 2012*

**English**

"Well the two of us can have fun together," I said. Baba smiled. Winked. "Dress warm," he said. It should have been just the two of us--that was the way I wanted it--but by Wednesday night, Baba had managed to invite another two dozed people." (p. 87) ...
*December 2, 2012*

**Math 8R - HW Qs. Check**

(-2)2 = -4 (you said positive 4, I don't know if it was a typo, or...) Having said that, all should be correct... I'm confused. Did you copy the question correctly?
*December 2, 2012*

**College Physics 1**

A mass is oscillating on a spring with a period of 4.60s. At t=0s the mass has zero speed is at x=8.30cm. What is the value of t the first time after t=0s that the mass is at x=4.15 cm?
*November 28, 2012*

**social studies**

In early Korea what were the strongest influences?
*November 18, 2012*

**Math**

Can you please help me with this? Convert 36.7 lbs/in(3) to kilograms per cm(3). (There are 14.59 kilograms in 32.174 pounds and 61.02 in(3) in 1000 cm(3)). Thanks!
*November 18, 2012*

**social studies**

thank you so much!
*November 18, 2012*

**social studies**

what was Europe's major religion during the Enlightenment period?
*November 18, 2012*

**chemistry**

0.24 grams of benzene (C6H6) is dissolved into 4.9 grams of melted biphenyl. The freezing point of the mixture was determined to be 4.4 degrees below the freezing point of pure biphenyl. Based on these results, what is the Kf of biphenyl? (Use the standard units in your ...
*November 13, 2012*

**Chemistry**

If a 11.0 mL sample of vinegar (aqueous acetic acid ) requires 19.0 mL of 0.500 M NaOH to reach the endpoint, what is the original molarity of the acetic acid solution?
*October 29, 2012*

**Physics**

A roller coaster travels 29.1 m at an angle of 34.0 above the horizontal. How far does it move horizontally?
*October 23, 2012*

**Physics**

A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 38.8 m/s. At the same time, it has a horizontal velocity of 54.3 m/s.At what speed does the vehicle move along its descent path
*October 23, 2012*

**Chemistry**

Calculate the number of carbon atoms in 0.75 L of acetone (CH3COCH3). (density=1.3g/mL and boiling point=48.5 degrees)
*October 22, 2012*

**Can you help me make my thesis sound clear & good**

In the short story, "how much land does a man need," the author Leo Tolstoy would describe that human worth based on shallow measurements such as wealth and possessions make true love and humanity impossible because of greediness, the devil filling our minds with ...
*October 15, 2012*

**Algebra 2**

x+2y+5z=-1 2x-y+z=z 3x+4y-4z=14 solve the system using linear combination method.
*October 14, 2012*

**english/essay writing help**

Hello! So Im having trouble with my thesis statement for an essay. My teacher gave us three questions to answer and make the answers into a thesis statement. heres the questions and instructions: Does defining human worth based on shallow measurements, such as wealth and ...
*October 14, 2012*

**chemistry**

a glass jar containing .27 mol of Nitrogen with a leaky lid is heated from room temperature 22 celcis to 150 celcis. How many moles of Nitrogen remain? How many gtams?
*October 12, 2012*

**Chemistry**

What mass (g) of KHP is required to neutralize 10.00 mL of 0.1092 M NaOH?
*October 9, 2012*

**Chemistry**

How many mL of the 0.1029 M standard NaOH solution is required to titrate 0.2247 g sample of KHP to the phenolphthalein end point?
*October 9, 2012*

**Chemistry**

What mass of NaOH is required to prepare 500.0 mL of 0.1029 M stock solution?
*October 9, 2012*

**chemistry**

How many grams of Kl are required to prepare 500 mL of 0.04 M Kl?
*September 25, 2012*

**Chemistry**

A bottle of wine contains 11.4% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality.
*September 23, 2012*

**Chemistry**

density of water and the antifreezer is 0.9975 g/mL and 1.141 g/mL I got molality of 54.5 and molar mass 18.33g.
*September 23, 2012*

**math**

how to solve 2x-9/3=8-3x
*September 20, 2012*

**Social Studies**

mexico,canada,U.S
*September 20, 2012*

**math**

thnx
*September 20, 2012*

**math**

how do you solve 4(3d-2)=8d-5
*September 20, 2012*

**Math**

ask your teacher for tutoring or find out if there are any tutoring classes in ur school. (good luck)
*September 20, 2012*

**Biology **

Down syndrome or trisomy 21, in humans is caused by an extra copy of relatively small chromosome 21. if a male with down syndrome could have children what is the likelihood that his children will also have down syndrome? a. 0 b. 25 c.50 d. 75 e. 100
*September 3, 2012*

**English**

Thank you Ms. Sue!
*August 26, 2012*

**English**

Could you help me find the "simple subject" and "simple predicate" in the following sentence please? "It is going to rain tomorrow." Thank you!
*August 26, 2012*

**Math**

The area of a square is 10 square meter. what is the product of the lengths of the diagonals of the square?
*August 22, 2012*

**math problem**

I have to find the area of a 14 yd square...the answer is the number plus the units squared
*July 13, 2012*

**physics**

A 9.1 g ball is hit into a 98 g block of clay at rest on a level surface. After impact, the block slides 8.0 m before coming to rest. If the coefficient of friction is 0.60, determine the speed of the ball before impact.
*June 22, 2012*

**trigonometry**

an automobile tire has a diameter of 36 inch.how many revolution will the wheel make an arc the automobile travels 1 mile (5280 A)?
*June 21, 2012*

**chemistry**

I am given the concentration of HClO4 and a pressure for H2... how do i plug either of the givens into the equation youve shown??
*June 18, 2012*

**chemistry**

calculate the reduction potential for hydrogen ion in a system having a perchloric acid concentration of 2.00 x 10^-4 M and a hydrogen pressure of 2.50 atm.
*June 18, 2012*

**chemistry**

will fe3+ oxidize Sn2+ to Sn4+ in acidic solution?
*June 18, 2012*

**chemistry**

the time is supposed to be 4.6 hours. i am not having problems getting the mass of Cu, i am just struggling with how to find how long it will take.
*June 18, 2012*

**chemistry**

i get 4.76 x 10^-5 mol CaC2o4.. squaring the answer gives me a ksp= 2 x 10^-9 is this right?
*June 10, 2012*

**chemistry**

a liter of a solution saturated at 25C with CaC2O4 is evaporated to dryness giving a 0.0061 gm residue of CaC2O4. Calculate the concentrations of the ions, and the molar solubility and the solubility product constant for this salt at 25C. Show the balanced reaction.
*June 10, 2012*

**Elementary Statistics**

1) Construct a confidence interval of the population proportion at the given level of confidence. x=60,n=300, 99% confidence. The 99% confidence interval is (_,_) 2) A researcher wishes to estimate the proportion of adults who have high-speed internet access. What size sample ...
*June 6, 2012*

**World History**

Who ruled the Byzantine Empire?
*May 29, 2012*

**Chemistry**

Ammonia reacts with oxygen at 120 C to form NO and H20 in a sealed 40-L container. When 34 g of ammonia reacts with 96 g of oxygen, what is the partial pressure of the NO? What is the total pressure?
*May 20, 2012*

**English**

Well, Jacob, the deal is that this student is obviously enrolled in a K12, Inc school, and therefore, has a teacher who she could've contacted. Many times, the answers that students get from these sites are TOTALLY off. I'd rather the student come to a teacher (like me...
*May 13, 2012*

**English**

Thank you, Writeacher! This question comes from online schools affiliated with K12. I am constantly finding students who use these sites to copy answers. Liz, did you ever think of reading the lessons the school provides or of contacting your instructor?
*May 13, 2012*

**Math**

What is the x-coordinate of the image of P(5,11) under R-0,90*-?
*April 15, 2012*