# Angel

Popular questions and responses by Angel-
## Math

By default, your numerical entry is scored as correct if it is within 1% of the correct answer. A rule of thumb is always to enter at least 3 digits for numerical questions. If the correct answer is 7.48809, which of the following entries would be counted

*asked on September 28, 2011* -
## Chem

What is the enthalpy for the following reaction? overall: C2H4+H2O--->C2H5OH is -1411kJ correct??

*asked on November 4, 2010* -
## Statistics

Twelve different video games showing substance use were observed and the duration times of game play ( in seconds) are listed below. The design of the study justifies the assumption that the sample can be treated as a simple random sample. use the data to

*asked on March 24, 2014* -
## Linear Algebra

Let L be the line with parametric equations x = 2+3t y = 3−2t z = 2+t Find the shortest distance d from the point P0=(−5, 1, −4) to L, and the point Q on L that is closest to P0. Use the square root symbol '√' where needed to give an exact value

*asked on November 26, 2017* -
## Chemistry

How many milliliters of 5M H2SO4 are required to make a 1500ml of a .002M H2SO4 solution. I used the formula M*L=M * L so mL *5 = 1500 * .002 I got .6mL is this right?

*asked on September 18, 2011* -
## calculus

If 1300 square centimeters of material is available to make a box with a square base and an open top, find the largest possible volume of the box.

*asked on February 28, 2020* -
## geography

Explain the effects of the poor service delivery. There must evidence that i actually investigate the poor service delivery physically where possible. Explanation must be with regard to social or Economic or Environmental problem

*asked on April 29, 2017* -
## Algebra

Justine earned $26,000 during the first year of her job at city hall. After each year she received a 3% raise. Find her total earnings during the first five years on the job.

*asked on April 13, 2016* -
## english

Choose the sentence in which the verb has a direct object. A. George was furious. B. I walked away. C. They won the game. D. She is insecure.

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

can anyone help with this problem please..... Potassium chlorate decomposes according to the following equation: 2KClO3 (s) → 2KCl (s) + 3O2 (g). If a 3.00 g sample of KClO3 is decomposed and the oxygen is collected at 24.0 °C and 0.991 atm, what volume

*asked on November 12, 2015* -
## Math

A retired couple needs $12,000 per year in income to supplement their Social Security. They have $150,000 to invest to obtain this income. They have decided on two investment options: AA bonds yielding 10% per annum and a bank CD yielding 5%. (a) How much

*asked on July 7, 2005* -
## Physics

1. Two people are pushing a disabled car. One exerts a force of 200 N East, the other a force of 250 N East. What is the net force exerted on the car? 2. Two hockey players strike a puck simultaneously from opposite sides. Red #3 hits it with 40 N of force

*asked on October 11, 2018* -
## science

A coach tells his little league players that hitting a 0.275 batting average, within 7% percentage error, means that they had a really great season. Seven year old Tommy ended the season hitting a 0.258 batting average. According to his coach, did he have

*asked on August 22, 2017* -
## physics

A motorcyclist is trying to leap across a canyon by driving horizontally of the cliff that is 70.0 m high at 38.0 m/s. Ignoring air resistance, use energy conservation to find the speed with which the cycle strikes the ground at a height of 35.0m on the

*asked on July 14, 2011* -
## Drug addiction substance

Human factors that cause ill health.accidents,crises/disaster and an appropriate way to deal with these

*asked on May 16, 2011* -
## HVAC

Two HVAC/R technicians are discussing the tape used in HVAC/R repairs. Technician A says that cloth duct tape is preferred for use in attics. Technician B says that UL 181 tape is normally required for duct closing systems. Which one of the following

*asked on June 13, 2017* -
## Analytical chemistry

Calculate the expected concentrations of vitamin B6 and caffeine in the stock solution assuming exactly 0.0506 g of pyridoxine hydrochloride (vitamin B6) and 0.1253 g of caffeine are dissolved in a 100 mL volumetric flask.

*asked on November 23, 2016* -
## Math

The temperature in the morning was -23.9 degrees farenight. It rose 30.3 degrees by noon and dropped 7.5 degrees by evening. What were the noon and evening tempertures ?

*asked on January 2, 2016* -
## Physics

A small cork with an excess charge of +6.0 µC is placed 0.25 m from another cork, which carries a charge of −3.2 µC. What is the magnitude of the electric force between the corks? The Coulomb constant is 8.98755 × 10 9 N · m2 /C 2 . Answer in units

*asked on April 29, 2012* -
## Chemistry (PLEASE HELP ME)

1. According to the phase diagram for water, how is the state of water determined? a. proceed up a vertical line at any given temperature b. read the phase at the intersection of any given temperature and pressure c. at a given pressure, proceed

*asked on October 13, 2011* -
## Math

A rectangular garden plot 16 by 24 meters is to be bordered by a strip of uniform width x meter so as to double the area. Find x.

*asked on August 1, 2017* -
## English

Which are features of myths? Check all that apply. supernatural gods or animals fantastic settings humorous elements that entertain the reader an attempt to explain the origin of the universe characters found in everyday life conflicts between worlds,

*asked on October 6, 2016* -
## chemistry

a first order reaction has a rate constant of 7.5 x 10^-3/s. The time required for th reaction to be 60% complete is

*asked on June 17, 2008* -
## analytical chemistry

Calculate the concentration of the initial nitrate stock solution (in ppm) if exactly 0.361 g of KNO3 is dissolved in a 1 L volumetric flask with distilled water. Here I want the concentration of nitrogen in ppm.

*asked on September 22, 2016* -
## statics

Walleye is a common game fish. Adult walleye have a length with a mean of 44 cm and a standard deviation of 4 cm and the distribution of lengths is approximately Normal. What fraction of walleye are longer than 52 cm in length?

*asked on June 22, 2015* -
## math check

Posted by TchrWill on Thursday, July 14, 2005 at 5:44pm. 2.)The sum of four consecutive odd integers is -336. Set up an equation AND solve for all of the integers. Two ways to approach this. -336/4 = -84 making the 4 consecutive odd numbers -81, -83, -85

*asked on July 17, 2005* -
## Chemistry

Suppose that a device is using a 5.00-mg sample of silicon that is doped with 1 × 10-5% (by mass) phosphorus. How many phosphorus atoms are in the sample?

*asked on March 6, 2018* -
## algebra

write an explicit formula for the nth term an for 17,20,23,26

*asked on October 17, 2016* -
## analytical chemistry

Calculate the concentration of the initial nitrate stock solution (in ppm) if exactly 0.361 g of KNO3 is dissolved in a 1 L volumetric flask with distilled water.

*asked on September 21, 2016* -
## Math

A balloon 150 meters from the observer is rising vertically at constant rate. After 1 minute the angle of elevation is 28 degrees and 29 minutes. What is the angle after 3 minutes?

*asked on June 22, 2016* -
## math

A 10-foot ladder is leaning against a wall. The base of the ladder is 2 feet from the base of the building. How far up the building does the ladder fall?

*asked on March 22, 2016* -
## science

Which of the following represents a heterogeneous mixture? A.saltwater B.air C.bleach and water D.chicken noodle soup I think the answer is D. Chicken noodle soup. I don't know exactly.

*asked on February 2, 2015* -
## chemistry

A man pushes on a trunk with a force of 250 newtons. The trunk does not move. How much positive work is done on the trunk?

*asked on January 27, 2015* -
## A thanks to Writeacher

THANK YOU lol thank you very much i now understand wat shes sayin myteacher don't really get it either lol wen i asked him in class so thank you very very much

*asked on November 10, 2010* -
## geometry

If EF = 2x – 12, FG = 3x – 15, and EG = 23, find the values of x, EF, and FG. The drawing is not to scale.

*asked on September 8, 2010* -
## Chemistry Titration Lab HELP!

Hi everyone! I just got a new lab that I MUST complete today, and it's about titration- I have absolutely no clue how to do it, it just doesn't make sense to me! I hope that someone can help explain to me how to do it so I can finish ASAP!! Thanks a lot,

*asked on June 11, 2008* -
## physics

The radius of the planet Venus is nearly the same as that of the earth, but its mass is only 80% that of the earth. If an object weighs W on the earth, what does it weigh on Venus? Calculate the value of 'g' on Venus

*asked on November 26, 2019* -
## Physics

A charge +q is at the origin. A charge -2q is at x = 6.30 m on the +x axis. (a) For what finite value of x is the electric field zero? (b)or what finite values of x is the electric potential zero? (Note: Assume a reference level of potential V = 0 at r =

*asked on January 20, 2018* -
## MATH

A dietician is planning a snack package of fruit and nuts. Each ounce of fruit will supply zero units of protein, 3 units of carbohydrates, and 2 unitss of fat, and will contain 20 calories. Each ounce of nuts will supply 2 units of protein, 11

*asked on October 19, 2016* -
## English

Which of the following sentences uses a preposition properly? A. Connor waited in line while Ava parked the car. B. Where is David at? C. There was a big argument between Megan, Abira, and Lena. D. I might of lent him the book, if he had asked

*asked on June 26, 2012* -
## Physics

A balloon rubbed against denim gains a charge of −2.0 µC. What is the electric force between the balloon and the denim when the two are separated by a distance of 5.0 cm? (Assume that the charges are located at a point.) The value of the Coulomb

*asked on April 29, 2012* -
## AiMS MATH

-5 Is A Member Of Which Subset Of Real Numbers. a) natural numbers b) whole numbers c) intergers d) rational numbers e) irrational numbers

*asked on January 20, 2011* -
## Math

x is a partly constant and partly varies with y when y =3, x=7 and when y=6, x=9, find the relationship between x and y.Hence find x when y=4. solution?.

*asked on December 24, 2018* -
## linear algebra

Let L1 be the line passing through the point P1=(9, 0, 0) with direction vector →d1=[3, 2, −2]T, and let L2 be the line passing through the point P2=(−10, 8, 4) with direction vector →d2=[3, 0, 2]T. Find the shortest distance d between these two

*asked on December 1, 2017* -
## Geometry

The Design for a Mural is 16 in. Wide and 9 in High. What are the Dimensions of the largest possible complete mural that can be painted on a wall 24 ft wide by 14 ft wide? And Can you Please Explain. I understood how to do it. but which height or width

*asked on December 12, 2011* -
## Chemistry

I'm confused on this problem A gaseous mixture inside a rigid steel vessel contains 75% CO2 and 25% H2O by volume at 175 degrees C and 225 kPa. The mixture is then cooled to 0 degrees C, thereby condensing the water vapor. What is the pressure of the CO2

*asked on November 27, 2011* -
## Chemistry 111

How many moles of methane are produced when 8206 moles of carbon dioxide gas react with excess hydrogen gas?

*asked on July 14, 2011* -
## math

which of the following expressions shows the equation to use in the finding the dimensions of a cube N by N by N with a volume 125 1) n3=125 2) n2=125 3) 3n=125 4) n=125/3 5) not enought info given need help with this problem!!

*asked on August 24, 2010* -
## chemistry

A drop of oil (volume 0.05cm3) is released from a medicine dropper on to the calm surface of a pond where it spreads out to cover an area of "40m2". Assume that the oil film has a uniform thickness equal to the diameter of a oil molecule. Calculate the

*asked on March 9, 2007* -
## physics

A negative charge Q1 = -20.0 mC is located at a point X1 = -2.00 m, a positive charge Q2 = 10.0 mC is located at a point X2 = 3.00 m and a positive charge Q3 = 30.0 mC is located at a point X3 = 9.0 m.a. Draw free body diagrams for the electric force

*asked on June 8, 2020* -
## algebra

is the sequence geometric if so identify the common ratio 2 -4 -16 -36

*asked on February 28, 2020* -
## math

A gardener has 720 feet of fencing to fence in a rectangular garden. One side of the garden is bordered by a river and so it does not need any fencing.What dimensions would guarantee that the garden has the greatest possible area?

*asked on September 27, 2019* -
## social studies

1. Drag each idea to the thinker that would agree with it the most. Ideas can be used once or not at all. The best way for a nation to increase wealth is to remove all barriers to trade. added to The power to rule a country is given by God alone, and the

*asked on September 19, 2019* -
## Math

Find the slope of the following graph

*asked on July 17, 2019* -
## geometry

Quadrilateral ABCD is transformed according to the rule (x, y) → (y, –x). Which is another way to state the transformation?

*asked on June 13, 2019* -
## Math

Pradip and pam each have apple slices and orange slices. The ratio of apple slices to the total number of slices is 4 to 11. The ratio of the total number of slices to orange slices on Pam's plate is 13:6. Neither person has more than 20 total slices. Who

*asked on October 16, 2017* -
## Living Waters private school

Can I choose Human resource or safety officer when am doing maths literacy, economic,business and tourism

*asked on July 29, 2015* -
## Statistics

Assume that a procedure yields a binomial distribution with n=3 trials and a probability of success of p= 0.90. Use a binomial probability table to find the probability that the number of successes x is exactly 1.

*asked on December 2, 2014* -
## math

Farmer john has hens, geese, ducks, and two goats the number of hens equals the number if geese and ducks combined . There are 5 fewer geese than ducks. If the total number of animals is 40 how many are ducks

*asked on September 25, 2014* -
## Chemistry

A sample of gas occupies 100ml at 27 degree Celsius and 740mm pressure. The temperature the gas will have,when its volume is changed to 80ml at 740mm pressure is?

*asked on May 19, 2014* -
## Chemistry/Math

I'm not sure how to approach this problem. The teacher wants volumetric flow rate (in cm). A commonly used rule of thumb is that average velocity in a pipe should be about 1 m/s or less for "thin"(viscosity about water). If a pipe needs to deliver 6,000

*asked on August 31, 2012* -
## english

Which sentence below contains a correctly used modifier in italics? A. Joe looked sad at his broken bike. B. The sauce tasted bitterly, and I couldn't swallow it. C. He spoke sharply to his sister. D. I feel badly because I lost the race.

*asked on June 26, 2012* -
## physics

A girl throws a water-filled balloon at an angle of 50.0 degree(s) above the horizontal with a speed of 12.0 m/s. The horizontal component of the balloon's velocity is directed toward a car that is approaching the girl at a constant speed of 8.00 m/s. (See

*asked on May 17, 2012* -
## chemistry

what type of reaction is Al+S8=Al2S3

*asked on March 14, 2012* -
## Physics

When a rattlesnake strikes, its head accelerates from rest to a speed of 26 m/s in 0.3 s seconds. Assume for simplicity that the only moving part of the snake is its head of mass 100 g. How much (average) power does the rattlesnake need to accelerate its

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

Please answer these problem for me.Thanks so much. 1. Border's Bookstore ordered 800 art books. On verifying the order, only 160 books were actually received. The percent of the order missing was: 2. The net price equivalent rate of 9/15/18 is: 3. If the

*asked on October 19, 2011* -
## Chem

1. According to the phase diagram for water, how is the state of water determined? a. proceed up a vertical line at any given temperature b. read the phase at the intersection of any given temperature and pressure c. at a given pressure, proceed

*asked on October 13, 2011* -
## physics

A satellite explodes in outer space, far from any other body, sending thousands of pieces in all directions. How does the linear momentum of the satellite before the explosion compare with the total linear momentum of all the pieces after the explosion?

*asked on June 28, 2011* -
## legal terminology

Defamation through speech or another heard medium is known as A. libel. B. slander. C. damage. D. damage. my answer B

*asked on March 23, 2011* -
## English (Romeo and Juliet)

Where juliet says: "O romeo, romeo!Wherefore art thou Romeo? Deny thy father and refuse thy name; Or if thou wilt not,be sworn my love, And ill no longer be a Capulet" i don't understand what she is sayin and i don't understand what she means

*asked on November 10, 2010* -
## CALC

why is the surface area of a cube not the derivative of a volume?

*asked on October 7, 2010* -
## Physics

A propeller spins at 1880 rev/min. the equals 197 rads/sec b. What is the angular displacement of the propeller in 2.50 s ?

*asked on December 6, 2009* -
## word problem

13.

*asked on July 16, 2005* -
## Statistics

A committe of 5 members will be chosen from a group of 10 teachers and 5 students. What is the probability that the committee will have A) all teachers? B) 3 teachers and 2 students? C) 3 or 4 teachers?

*asked on January 5, 2018* -
## English

When summarizing the of a plot, one should notice the key ideas about how the conflict builds.

*asked on October 6, 2016* -
## Math look for patterns

Marvin counts six $5 bills. Write each value that he counts. What patterns do you see in the ones digits of the values he counts?

*asked on February 10, 2016* -
## Language Arts

What is the main message of the words that the Statue of Liberty speaks in "The New Colossus" by Emma Lazarus? Key: *** is my answer A. I am a tired, old woman, but I am still strong. B. Welcome to needy immigrants in search of a new home.*** C. America is

*asked on February 9, 2016* -
## Algebra

Simplify the expression. Assume that all variables represent positive numbers. Write your answer without using negative exponents. (343x^-6y/8y^-8x^6)^-2/3

*asked on September 21, 2015* -
## Chemistry

The formula for magnesium carbonate is MgCO3. What is the charge of the cation in Ag2CO3? Would it be +1 or +2 because there are two of Ag?

*asked on July 29, 2015* -
## algebra need help

The highest temperature ever recorded in a certain town was 88 Fahrenheit . the lowest temperature ever recorded there was -24 Fahrenheit what is the difference between the two temperatures.

*asked on April 29, 2015* -
## Social Studies

Until the 1700s, the mayan calendar was much more accurate than any calendar used in... A. the United States B. Europe C. China D. the Middle East

*asked on March 13, 2015* -
## math

To make 4 1/2 gallons of ice cream, it takes 6 3/10 gallons of milk. How many gallons of milk does it take to make one gallon of ice cream? Do I divide 6 3/10 by 4 1/2

*asked on February 27, 2015* -
## Physics

A baseball with mass of 0.145 kg is thrown straight down at the ground. At a particular speed, it has a drag force of 0.4 N acting on it. What is its acceleration at that time? -2.8m/s^2

*asked on December 21, 2014* -
## Physics

a BATH CONTAINS 100 KG OF WATER AT 60 DEGREES CELCIUS. HOT AND COLD TAPS ARE THEN TURNED ON TO DELIVER 20KG PER MINUTE EACH A TEMPERATURE 70 DEGREES CELSIUS AND 10 DEGREES CELSIUS RESPECTIVELY. HOW LONG WILL IT BE BEFORE THE TEMPERATURE IN THE BATH HAS

*asked on March 10, 2014* -
## English

Identify the comma splice. A. Sheema applied for a summer internship she accepted a volunteer position at the hospital. B. Sheema applied for a summer internship, she accepted a volunteer position at the hospital. C. Sheema applied for a summer internship

*asked on October 9, 2013* -
## social studies

how many oceans surrond asia?

*asked on February 12, 2013* -
## collegemathwordproblem

When a number is decreased by 30%of itself, the result is 28. What is the number?

*asked on October 22, 2012* -
## Science

I not sure what formula to use for KE or how to find the mass for the equation. Water is flowing through a 2-inch diameter pipe with a velocity of 3 ft/s. Part A What is the kinetic energy of the water in (ft)(lbf)/(lbm)? (lbf) pound force (lbm) pound mass

*asked on August 25, 2012* -
## math

The total hang time T in seconds, is given by T(h)=^h/2. Where h is the maximum height. If a person jumps 6 ft off the ground, determine for how many seconds the person is in the air.

*asked on April 19, 2012* -
## Physics

An object 3.35 cm tall is placed 10.8 cm in front of a mirror, which creates an upright image that is 5.61 cm in height. a) What is the magniﬁcation of the image?

*asked on April 1, 2012* -
## Physics

The image of a crayon appears to be 20.6 cm behind the surface of a convex mirror and is 1.64 cm tall. The mirror’s focal length is 54.3 cm. a) How far in front of the mirror is the crayon positioned? Answer in units of cm I keep on getting it wrong so

*asked on April 1, 2012* -
## Physics

A concave makeup mirror is designed so that a person 25.3 cm in front of it sees an upright image at a distance of 54.0 cm behind the mirror. a) What is the radius of curvature of the mirror? Answer in units of cm

*asked on March 29, 2012* -
## Statistics

Suppose a basketball player, Player A, made 80% of her free throw attempts last season and that she continues to shoot free throws at the same rate. Assume that free throw attempts are independent. Let the random variable X be the number of free throws

*asked on March 2, 2012* -
## World History

The world's oldest recognized monarchy is found in _____. a. Kush b. Egypt c. Nubia

*asked on October 13, 2011* -
## Algebra 2 math

What is the 32nd term of the arithmetic sequence where a1 = 12 and a13 = –60?

*asked on September 19, 2011* -
## Chemistry 111

what is the molar mass of Butane,C7H10?

*asked on July 14, 2011* -
## Chemistry 111

How many moles of nitrogen N are there in 71.0g of Nitrous Oxide(N2O)?

*asked on July 14, 2011* -
## Chemistry 111

What is the mass of 7080 moles of magnesium chloride (MgCl2)?

*asked on July 14, 2011* -
## physics

Two identical cars have the same speed, one traveling east and one traveling west. Do the cars have the same momentum?

*asked on June 28, 2011* -
## Chemistry

Can an acidic solution be made less acidic by adding an acidic solution?

*asked on May 11, 2011*