# clara

Most popular questions and responses by clara-
## ap physics

Suppose that Superman wants to stop Earth so it does not rotate. He exerts a force on Earth F⃗ SonE at Earth's equator tangent to its surface for a time interval of 1 year. The mass of Earth is 5.98×1024kg, the radius is 6.37×106m. Assume that Earth is

*asked on March 7, 2017* -
## phyics

A Verdant Power water turbine (a "windmill" in water) turns in the East River near New York City. Its propeller is 2.5 m in radius and spins at 32 rpm when in water that is moving at 2.0 m/s. The rotational inertia of the propeller is approximately 3.0

*asked on March 9, 2017* -
## ap physics

Suppose that a person closes a car door. The person's fingers are in the door opening, that is located 0.50 m from the hinges. The rotational inertia of the car door is 5.0 kg⋅m2. The door closes in 0.1 s and the rotational speed of the door is 1.4 rad/s

*asked on March 7, 2017* -
## ap physics

A car leaves an intersection after a light turns green. It starts from rest and reaches a speed of 13.4 m/s in 5.0 s. The radius of a tire of the car is 0.25 mDetermine the average rotational acceleration of the tire.

*asked on March 7, 2017* -
## physics

A ballet student with her arms and a leg extended spins with an initial rotational speed of 1.2 rev/s . As she draws her arms and leg in toward her body, her rotational inertia becomes 0.80 kg⋅m2 and her rotational velocity is 3.9 rev/s .Determine her

*asked on March 9, 2017* -
## algebra

n a survey of 60 randomly-chosen employees, 15 said they would prefer an hour for lunch with no breaks each day. 45 employees said they would prefer thirty minutes for lunch with two other breaks each day. If there are 500 people employeed by the company,

*asked on August 4, 2014* -
## ap physics

A star the size of our Sun runs out of nuclear fuel and, without losing mass, collapses to a white dwarf star the size of our Earth. The radius of our Sun is 6.96×108m , the radius of Earth is 6.37×106m . If the star initially rotates at the same rate as

*asked on March 7, 2017* -
## algebra

The table below gives the value of a car over two years. Using an exponential best-fit model, after how many years is the car valued at 25% of the original value? Year 0 0.5 1.0 1.5 2.0 Value ($) 15,500.00 14,560.00 13,911.20 12,969.66 12,204.09

*asked on July 29, 2014* -
## Algebra pt. 2

Relating back to my question below I think I have it.. I multiplied the coordinates by 2 and got.. V 12 4 W -4 8 X -6 -4 Y 6 -10 Here is my question of the previous post.. The coordinates of quadrilateral VWXY Are given below. Find the coordinates of its

*asked on November 21, 2016* -
## Algebra

The coordinates of quadrilateral VXY Are given below. Find the coordinates of its image after a dilation with the given scale factor V(6, 2), W(-2, 4), X(-3, -2), Y(3, -5) scale factor of 2 Do I just multiply the coordinates by each other?? V(12 x 4) W(-4

*asked on November 21, 2016* -
## Chemisty

Balance TeO3^3- + N2O4 --> Te +NO3^- using oxidation numbers Need help A.S.A.P

*asked on June 15, 2015* -
## ap physics

A Verdant Power water turbine (a "windmill" in water) turns in the East River near New York City. Its propeller is 2.5 m in radius and spins at 32 rpm when in water that is moving at 2.0 m/s. The rotational inertia of the propeller is approximately 3.0

*asked on March 7, 2017* -
## physics

A star the size of our Sun runs out of nuclear fuel and, without losing mass, collapses to a white dwarf star the size of our Earth. The radius of our Sun is 6.96×108m , the radius of Earth is 6.37×106m If the star initially rotates at the same rate as

*asked on March 8, 2017* -
## ap physics

Determine the change in rotational kinetic energy when the rotational velocity of the turntable of a stereo system increases from 0 to 33 rpm. Its rotational inertia is 6.8×10−3kg⋅m2 .

*asked on March 7, 2017* -
## physics

A 10-kg disk-shaped flywheel of radius 9.0 cm rotates with a rotational speed of 320 rad/s. Determine the rotational momentum of the flywheel. With what magnitude rotational speed must a 10-kg solid sphere of 9.0 cm radius rotate to have the same

*asked on March 8, 2017* -
## physics

An extremely dense neutron star with mass equal to that of the Sun has a radius of about 10 km −about the size of Manhattan Island. These stars are thought to rotate once about their axis every 0.03 to 4 s, depending on their size and mass. Suppose that

*asked on March 9, 2017* -
## CHEMISTRY HELP PLEASE!!!

The cell potential of the following electrochemical cell depends on the pH of the solution in the anode half-cell: Pt(s)|H2(g,1atm)|H+(aq,?M)||Cu^2+(aq,1.0M)|Cu(s) what is the pH of the solution if Ecell is 375 mV? I first got .65 as my pH, but it said

*asked on March 30, 2013* -
## Math

The Fiedler family has up to $130,000 to invest. They decide that they want to have at least $40,000 invested in stable bonds yielding 5.5% and that no more than $60,000 should be invested in more volatile bonds yielding 11%. How much should they invest in

*asked on March 7, 2016* -
## Physics

The size of Rutherford's atom is about 0.1 nm. (a) Calculate the attractive electrostatic force between an electron and a proton at that distance. (b) Calculate the electrostatic potential energy of that atom. Express the result in unit eV. (c) The size of

*asked on March 13, 2016* -
## Math

An artist is creating a mosaic that cannot be larger than the space allotted which is 4 feet tall and 6 feet wide. The mosaic must be at least 3 feet tall and 5 feet wide. The tiles in the mosaic have words written on them and the artist wants the words to

*asked on March 7, 2016* -
## Math

If it takes 4 minutes to fill a bucket with one tap and 6 minutes to fill the bucket with another tap. Using both taps how many seconds will it take to fill the bucket?

*asked on February 4, 2013* -
## Physics

A 5 gram bullet is fired into a 7 kg ballistic pendulum suspended vertically from the ceiling. If the bullet embeds into the block and the two move as one to a new final height of 12 cm. What was the initial velocity of the bullet before impacting the

*asked on January 30, 2015* -
## US History

What recent election resulted in a variety of proposals to change the voting system?

*asked on October 30, 2018* -
## chemistry

Heating an ore of antimony (Sb2S3) in the presence of iron gives the element antimony and iron(II) sulfide. Sb2S3(s) + 3 Fe(s) 2 Sb(s) + 3 FeS(s) When 10.9 g Sb2S3 reacts with an excess of Fe, 9.84 g Sb is produced. What is the percent yield of this

*asked on March 31, 2010* -
## algebra

The manager of the school cafeteria is planning a plate lunch. She can spend no more than $2.00 per lunch and can choose servings from selections A and B. The table indicates the cost and the quantity of sugar and protein (in grams) per serving of each

*asked on March 30, 2015* -
## Math Finance

How much interest does $2560 earn in 17 months at a rate of 5 1/8 ?

*asked on January 2, 2012* -
## ap physics

A car leaves an intersection after a light turns green. It starts from rest and reaches a speed of 13.4 m/s in 5.0 s. The radius of a tire of the car is 0.25 m.

*asked on March 7, 2017* -
## Math

Five students equally share 1/2 of a pizza. How much of a whole pizza did each student eat

*asked on February 28, 2018* -
## ap physics

A 10-kg disk-shaped flywheel of radius 9.0 cm rotates with a rotational speed of 320 rad/s. Determine the rotational momentum of the flywheel. With what magnitude rotational speed must a 10-kg solid sphere of 9.0 cm radius rotate to have the same

*asked on March 7, 2017* -
## social studies

Barbara's due date was over 2 weeks ago. Dr. Sally told Barbara that her baby is postmature, so she wants to induce labor. What is probably Dr. Sally's greatest concern regarding the health of Barbara's baby? A. The baby might be brain damaged. B. Barbara

*asked on October 4, 2012* -
## business

If you think that your bill is wrong, you should first: A. contact the local credit bureau and inform it of the billing error. B. complain to the Better Business Bureau. C. contact your state consumer protection agency. D. notify the creditor in writing

*asked on September 26, 2012* -
## math

A local photocopying store advertises as follows. " We charge 9 cents per copy for 150 copies or less, 6 cents per copy for each copy over 150 but less than 210 , and 3 cents per copy for each copy 210 and above. " Let x be the number of copies ordered and

*asked on February 12, 2014* -
## Physics

A young girl with mass 39.5 kg is sliding on a horizontal, frictionless surface with an initial momentum that is due east and that has magnitude 85.5 kg⋅m/s . Starting at 0 s , a net force with magnitude F=( 8.35 N/s )t and direction due west is applied

*asked on October 26, 2017* -
## Physics

A 1800 kg mass car is traveling south at a velocity of 15 m/s through an intersection. It is hit by a 3500 kg mass car traveling east at 20 m/s. If the two cars collide and become one object (perfectly inelastic). What will be the final displacement of the

*asked on January 30, 2015* -
## maths

Given the demand function:p(x)=-0.5x+500 where p is price in RM per unit and x is the quantity demanded and the marginal costfunction C'(x) = -0.5-480, and the fixed cost =RM 900, find a) the level of production that will maximise profit b) the maximum

*asked on January 4, 2015* -
## Chemistry

In the reaction C(s) + 2S(s) ¨ CS2(l), the change of enthalpy (ƒ¢H) is 89.3 kJ. Calculate the amount of heat absorbed when 6.33 g of carbon disulfide is formed.

*asked on May 14, 2014* -
## math

Start with the integer 4. Subtract 8. From your answer subtract -2, and then subtract 17 from the last answer. What is your final answer?

*asked on November 10, 2016* -
## Science

consider a solid cylindrical disk rotating on an axis through its center. If the angular momentum of the disk increases, what can you conclude?

*asked on October 8, 2015* -
## Physics

A 2.0 kg ball moving with a speed of 3.0 m/!@#$%^&s, elastically, an identical stationary ball as shown. If the first ball moves away with angle 30° to the original path, determine a)the speed of the first ball after the collision. b)the speed and

*asked on July 17, 2014* -
## math

Help please >.< The Hotel Lakewell has 450 rooms. Currently the hotel is filled . The daily rental is $ 750 per room. For every $ 4 increase in rent the demand for rooms decreases by 7 rooms. Let x = the number of $ 4 increases that can be made. - What

*asked on February 9, 2014* -
## social studies

How many years can you expect to spend in retirement? A. 6 to 10 years B. 10 to 12 years C. 12 to 16 years D. from 16 to 25 years Is the answer C?

*asked on September 27, 2012* -
## math

Start with the integer 4. Subtract 8. From your answer subtract -2, and the subtract 17 from the last answer. What is your final answer?

*asked on November 10, 2016* -
## social studies

The esteemed Dr. Bookworm has just completed a study in which he found a +1.0 correlation between the number of cups of coffee his students drank right before class and the scores they earned on his final exam. This correlation means that: A. the less

*asked on September 27, 2012* -
## business

An account at a commercial bank designed for people who want to earn a higher savings rate is a(n) __________ account. A. regular savings account B. regular checking C. share draft D. money market account My answer is D. Am I right?

*asked on September 26, 2012* -
## phycology

Money management refers to: A. preparing personal financial statements. B. day-to-day financial activities. C. storing financial records for easy access. D. spending money on current living expenses.

*asked on September 26, 2012* -
## chemistry

Consider the following reaction: C6H5CL+C2HOCL3=>C14H9CL5+H20 If 1142 g of C6H5CL is reacted with 485 g of C2HOCL3, what mass of C14H9CL5 would be formed?

*asked on November 20, 2011* -
## physics

Calculate the mass of brass if the heat to rise it's temperature of 10k is 38000j and it's specific heat capacity Of water is 380j/kg

*asked on July 13, 2017* -
## algebra2

Scores on a test are normally distributed with a mean of 75 and a standard deviation of 8. Estimate the probability that a randomly selected student scored between 71 and 75.

*asked on August 4, 2014* -
## Chemistry

How many kilojoules of heat are absorbed when 1.2 L of water is heated from 24oC to 86oC?

*asked on May 14, 2014* -
## Chemistry

Co-ordination number of Cr in dibenzene chromium is ??

*asked on April 16, 2013* -
## business

If creditors give you no credit for payments made during the billing period, this is called the: A. APR method. B. discount method. C. previous balance method. D. adjusted balance method. My choice is A, but Im a little confused.

*asked on September 26, 2012* -
## business

Debt-to-equity ratio is: A. calculated by dividing total liabilities by net worth. B. calculated by dividing monthly debt payments by net monthly income. C. determined by dividing your assets by liabilities. D. rarely used by creditors in determining

*asked on September 26, 2012* -
## math

Please show steps and give me explanations! Thank you. 1. If x=1/2, what is the value of 1/x+1/x-1 ? The answer is 0. 2. The sequence ZWYX may be changed in either two ways. Either two adjacent letters may be interchanged or the entire sequence may be

*asked on July 26, 2012* -
## Chemistry

Consider the following reaction: C6H5CL+C2HOCL3=>C14H9CL5+H20 If 1142 g of C6H5CL is reacted with 485 g of C2HOCL3, what mass of C14H9CL5 would be formed?

*asked on November 21, 2011* -
## math

what is a communitative property

*asked on November 2, 2010* -
## Algebra

A picture frame is 20cm x 16cm. There is 192cm squared of picture showing. Find the width of the frame.

*asked on April 1, 2008* -
## math

Which three options are true about motion in a straight line. A. A particle which moves at an increasing velocity has a constant acceleration. B. If two particles always have the same velocity as each other, their separation does not change. C. A particle

*asked on May 12, 2007* -
## Physics

What is the wavelength of light that can cause a transition of an electron in the hydrogen atom from the orbit with n = 6 to n = 8?(answer in µm)

*asked on March 13, 2016* -
## math

how to change 25 in a mixed number

*asked on February 6, 2014* -
## algebra

1/3log(x)-log(10000)=4

*asked on November 3, 2012* -
## social studies

Fran's little girl, Fifi, is a real tomboy. Fran asks you to explain why Fifi prefers rough play, boys' clothing and toys, and the company of boys to the company of girls. You believe in the biological explanation of gender development, so you will tell

*asked on October 8, 2012* -
## social studies

Jasper, who already had 6 cookies, has just taken the last cookie from the jar after Mother told him, "No more cookies!" You saw Jasper take the cookie. You ask him how he feels about what he has just done. Jasper says that he likes cookies. You ask him

*asked on October 8, 2012* -
## social studies

Which one of the following babies is at greatest risk for SIDS? A. Alfred, who is 5 months old and had a difficult birth B. Mary, who is 2 weeks old and has irregular sleep patterns and an overweight mother C. John, who is 3 months old and has a teenage

*asked on October 4, 2012* -
## social studies

Mary Lou must complete a research project to get her associate degree. She has just one year left to finish her degree and must spend as little time and money as possible on her research. She plans to compare stress levels of 8th graders to stress levels

*asked on September 27, 2012* -
## social studies

Four-year-old Sergei can tell his Poppa how to wash the clothes. Yesterday, Sergei told Poppa, "First, get the dirty clothes from the basket. Next, put them in the washing machine. Now, add some soapy stuff. Close the washer lid and press the button. When

*asked on September 27, 2012* -
## business

The average management fee for all mutual funds is: A. less than 0.25%. B. 0.25% to 0.50%. C. 0.50 to 1.25%. D. 1.25 to 2.50%. The answer I found is C, but I don't know if it is right.

*asked on September 27, 2012* -
## algebra

lean can paint her new apartment 3 hours longer than his friend,carlos.if both can do painting in 2 hours,how long will it take each one to finish the job alone?

*asked on January 5, 2012* -
## math

least to greatest 0.75, 0.39, 0.2, 0.35 i think its 0.2, 0.35, 0.75, 0.39

*asked on December 11, 2011* -
## Math

The domain of a function, f(x), is all numbers between -1 and 6, inclusive. The range of this function is all numbers between 0 and 12, inclusive. a) What is the domain of .5f(3x)? b) What is the range of .5f(3x)?

*asked on November 14, 2011* -
## Statistics - College

Dealing with binomials. P(Possible Prize) = 1/1000 n=52 P(winning)=P(x=1)= P(x=1)=52! (1!51!) (.(.001)1 (1-0.001)51 Is the answer 0.050949 OR 5.0949%?

*asked on May 29, 2009* -
## Math

Julie scored 50 points in a game. How many points did Leonora score if she scored p points less than Julie in terms of p?

*asked on November 24, 2016* -
## global warming

What is the Cause of global warming

*asked on June 17, 2015* -
## Biology

How can the mass transfer kc and ultrafiltration solvent flux be increased? Select one: a. Another stream of fluid can flow adjacent to the membrane to accumulate solute at the membrane surface b. Another stream of fluid can flow perpendicular to the

*asked on May 23, 2015* -
## Biology

Hi, one more question to clarify: How can the mass transfer kc and ultrafiltration solvent flux be increased? Select one: a. Another stream of fluid can flow adjacent to the membrane to accumulate solute at the membrane surface b. Another stream of fluid

*asked on May 22, 2015* -
## Biology

What is the osmotic pressure of the salt solution in reverse-osmosis? Select one: a. An equilibrium state where the amount of solvent passing in opposite directions is equal b. An equilibrium state where the amount of solvent passing in one direction is

*asked on May 21, 2015* -
## algebra

what is the error and the correction in finding the difference? 3/4 - 9/2 = 3-9 (4-2) = -6 / 2 = -3

*asked on December 8, 2014* -
## Algebra 2

Solving By Factoring 4x(x-6)-x(x-2)=-24 Please show work!!!

*asked on November 8, 2014* -
## Algebra 2

Solving By Factoring 6x^2-13x=-6 (x-8)(x-5)=x 4x(x-6)-x(x-2)=-24 Please show work I want to learn!!!!!!

*asked on November 8, 2014* -
## physics

this is a physics qustion im stuck on: ingrid holds the womans record time for a marathon race of 2h 21min 6s for 42.195km. The mens record is held by Blake grison of 2h 6 min 50s. If they had been in the same race how much would blake win by.. find this

*asked on March 25, 2014* -
## Algebra

Find the number of decibels for the power of the sound. Round to nearest decibels. A rock concert, 5.21 x 10^-6watts/cm^2 D= dB

*asked on November 3, 2012* -
## math

a seismoraph 300km from the epicenter of an earthquake recorded a maximum amplitude of 5.4 x 10^2um. Find this earthquakes magnitude on the Richter Scale. (Round your answer to the nearest tenth). M=

*asked on November 3, 2012* -
## social studies

Because/Even though children’s understanding of AIDS increases with age: A. AIDS education should not be attempted before adolescence. B. relatively young children can still grasp complex scientific concepts about disease. C. children in grades K-6

*asked on October 8, 2012* -
## social studies

Pookie is listening to music through headphones so that no one else can hear it. When Pookie's sister walks into the room, he says, "Sissy, do you like this song?" even though she cannot hear the music. Pookie's question indicates that he engages in which

*asked on October 7, 2012* -
## social studies

Results of Renee Baillargeon's sliding carrot research may suggest that object permanence: A. may not be present until much later than Piaget believed. B. may be present at a much younger age than Piaget thought. C. cannot be tested with

*asked on October 6, 2012* -
## social studies

Treasure claims that her 6-month-old baby, Precious, can add and subtract small numbers of objects. Recent research on infants' understanding of numbers would: A. indicate that Treasure is nuts. B. prove that Precious can add and subtract up to 20 objects.

*asked on October 6, 2012* -
## social studies

The right to __________ is not one of the ethical guidelines for research specified by the APA. A. financial compensation B. informed consent C. privacy and confidentiality D. avoidance of deception I cannot find the answer to this question.

*asked on September 27, 2012* -
## social studies

Four-year-old Sergei can tell his Poppa how to wash the clothes. Yesterday, Sergei told Poppa, "First, get the dirty clothes from the basket. Next, put them in the washing machine. Now, add some soapy stuff. Close the washer lid and press the button. When

*asked on September 27, 2012* -
## social studies

An Li reached puberty at age 12, and John Smith retired at age 65. An Li's and John Smith's experiences are examples of: A. normative events. B. non-normative influences. C. critical periods. D. risk factors. I chose A. but now reading a little more into

*asked on September 27, 2012* -
## social studies

The people who are in the best position to save are: A. teenagers. B. young adults in their 20s. C. middle-aged. D. elderly I'm between C and D. Please help!

*asked on September 27, 2012* -
## business

Most people pay federal income tax by: A. paying the total amount owed by April 15. B. filing quarterly tax payments. C. having amounts withheld from income. D. earning tax credits for various deductions. I chose d. But I am not sure

*asked on September 26, 2012* -
## algebra

mean is 20; 6,22,7,36,x what is the value of x

*asked on March 22, 2012* -
## Nursing

functional health assessment on movie chareacter "my sister's keeper"

*asked on February 17, 2012* -
## wchs

A checkerboard measures 144 square inches. What is the length of a small square on its side? Hint: It has 8 squares per edge.

*asked on January 30, 2012* -
## math

Suppose you borrow $12,000, which you must pay back in 30 equal monthly payments, each of which includes a .8% interest charge on the unpaid balance. a) How much will you need to pay each month? b) How much money did the bank make on this deal?

*asked on November 14, 2011* -
## Englisch

Can somebody help me to write a summary? The article "Towards a greener Economy?, written in 2009 by friedman, deals about the economic system in unsustainable. The satirical newspaper decribe the americans are wasteful. Than i don't know how can i write

*asked on September 20, 2011* -
## Geography

You and your partner are considering opening eight new upscale department stores in Nicaragua. Would your stores most likely do well or fail in this region? Explain your answer.

*asked on May 4, 2011* -
## geometry

Find the length of the median of a trapezoid with vertices at C(3,1) D(10,1) E(7,9) and F(5,9)

*asked on March 16, 2011* -
## English

I'm writing a persuasive essay about how women with HIV should not be allowed to have children. Can you please help me find some reliable sources about my topic? Thank you.

*asked on February 22, 2010* -
## math

Krista has $0.85 in nickels and dimes. She has 2 more nickels than dimes. How many nickels does she have?

*asked on January 24, 2010* -
## E- commerce

Can I have asimpler explanation for this sentence Cybermediation which is the use of software (intelligent agents to facilitate intemediation and hypermediation which is the extensive use of both human and electronic intermediation to provide assistance in

*asked on May 24, 2009*

## Pages

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