# becca

Popular questions and responses by becca-
## chemistry

When the following reaction is balanced in acid solution, the coefficient of H+(aq) will be: Cr2O72-(aq) + Sn2+(aq) --> Cr3+(aq) + Sn4+(aq)

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

Wes and Lindsay stand on the roof of a building. Wes leans over the edge and drops an apple. Lindsay waits, 1.25s afrer Wes releases his fruit and throws an orange straight down at 28 m/s. Both pieces of fruit hit the ground simultaneously. Calculate the

*asked on September 16, 2012* -
## Chemistry

What is the theoretical yield of PI3 from the reaction of 27.0 g of P and 68.0 g I2? 2P(s)+3I2(s) 2PI3(s)

*asked on December 8, 2010* -
## Chemistry

Calculate the energy of a photon of light with a wavelength of 360 nm?

*asked on December 8, 2010* -
## Physics

A 50.0 kg parachutist jumps out of an airplane at a height of 1.00 km. The parachute opens, and the jumper lands on the ground with a speed of 5.00 m/s. By what amount was the jumper's mechanical energy reduced due to air resistance during this jump? so,

*asked on December 5, 2006* -
## Chemistry

For another picnic, you want to make hamburgers with pickles, again without having any left over. You need to balance the number of packages of buns (which usually contain 8 buns) with the number of packages of hamburger patties (which usually contain 12

*asked on January 19, 2015* -
## chemistry

Find the molar solubility of BaCrO4 (Ksp= 2.1 × 10−10) in 3.5 × 10−3 M Na2CrO4

*asked on June 23, 2016* -
## English

PLEASE HELP!!! Please check my answers!! I'm not sure about a few of them, but i marked the answers that I think are correct. 1. In Act IV of Romeo and Juliet, what is Friar Lawrence’s advice to Juliet concerning her parents’ wishes that she marry

*asked on March 17, 2016* -
## Calculus I

A particle on the x-axis is moving to the right at 2 units per second. A second particle is moving down the y-axis at the rate of 3 units per second. At a certain instant the first particle is at the point (5,0) and the second is at the point (0,7). How

*asked on May 2, 2017* -
## Pre-calculus

Jana hit a golf ball with an initial velocity of 102 feet per second at an angle of 67° with the horizontal. After 2 seconds, how far has the ball traveled horizontally?

*asked on February 19, 2013* -
## Chemistry

A sample of unknown ore was analyzed and fgound to contain 12.7% Al, 19.7% N,and 67.6% O. What is the empirical formula of this ore?

*asked on December 8, 2010* -
## English

PLEASE HELP!!! I'm really confused about these question from Romeo and Juliet... I marked the answers that I "think" are right but I'm not sure. Please tell me which ones i got wrong and the correct answer!?!?! 1. Why doesn’t Juliet want to marry Paris?

*asked on March 15, 2016* -
## chemistry

If a swimmer has a lung volume of 6 at sea level, what would the volume of her lungs be when she is at the bottom of a pool that is 5 deep? Assume that the temperature and amount of the air in the lungs remain unchanged.

*asked on September 2, 2011* -
## economics

Which goods would be included in the calculation of GDP? A. toys made in China at a factory owned by a U.S. company B. cars made in Tennessee at a factory owned by a Japanese car company C. plastic made in Kentucky and sold to a toy maker in Ohio D. cotton

*asked on February 18, 2016* -
## Pre-calculus HELP PLEASE !

Find the coordinates of the center of the ellipse represented by 4x^2 + 9y^2 – 18y – 27 = 0. For 2x^2 + xy + 2y^2 = 1, find , the angle of rotation about the origin, to the nearest degree. Find the distance between points at (–1, 6) and (5, –2).

*asked on April 12, 2013* -
## Chemistry

At a certain temperature, the solubility of N_2 gas in water at 2.38 atm is 56.0 mg of N_2 gas/100 g of water. Calculate the solubility of N_2 gas in water, at the same temperature, if the partial pressure of N_2 gas over the solution is increased from

*asked on February 4, 2012* -
## Science

Quartzite and marble can look very similar. Why do you think artists carve sculptures out of marble more often than quartzite? Hint: Think composition and parent rock.

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

Please check my answers!! 1. A 75 kg. man steps off the end of a diving board, and hits the water at 7.7 m/s. Ignoring air resistance, what was the mans PE (potential energy) right before he stepped off the diving board? I got 2223.375 Joules after Damon

*asked on February 29, 2016* -
## English

Please help me with these question about Romeo and Juliet!!! They really are confusing me!! 1. In act 4 scene 1 of Romeo and Juliet, Paris tells Friar Laurence, "Immoderately she weeps for Tybalt's death, / and therefore have I little talked of love." What

*asked on April 7, 2016* -
## math

Find the area of the segment of the circle. Leave your answer in terms of pi. there is a circle with a shaded area that has a 90 degree triangle in it and a 3 next to one soide of the triangle

*asked on May 4, 2013* -
## AP Chemistry Born-Haber Cycle?

When using the Born-Haber Cycle for Na2S, do I double the ionization energy of Na since there are two Na ions for every S ion in Na2S? Also, the problem asked me to find the change in energy for S- (g) + e- => S2- (g). Assuming that you do double the

*asked on October 17, 2010* -
## math

The vertex of a parabola is(-2,-4). One x-intercept is 7. What is the other x-intercept?

*asked on March 22, 2010* -
## Math

A musician plans to perform 4 selections. In how many ways can she arrange the musical selections

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

A small farm field is a square measuring 230 ft on a side. What is the perimeter of the field? If you double the length of each side of the field, what is the new perimeter?

*asked on October 29, 2009* -
## English

Act 1 Scene 1 .. Romeo & Juliet I don't know the answer to two of my questions for Romeo and Juliet the first one . . . Although Rome and Juliet is a tragedy, much of the play is quite comic. Outline briefly the comic elements in this scene. To whatextent

*asked on February 13, 2007* -
## Physics

A 70.0 kg base runner begins his slide into second base while moving at a speed of 4.0 m/s. The coefficient of friction between his clothes and Earth is .70. He slides so that his speed is zero just as he reaches the base. How much mechanical energy is

*asked on December 5, 2006* -
## Elementary Statistics

Ten horses are entered in a horse race. How many permutations of 1st, 2nd, and 3rd place winners are there?

*asked on April 30, 2017* -
## Math

Lucy spends 4 hours a week babysitting.Her Sister Lily spends 7/8 as much time babysitting. Does Lily babysit for more or less than 4 hours? 7/8•4= 20/32 But then how do I break that down ?

*asked on February 17, 2016* -
## English 9

Please give me some advice!!!! Compare and contrast the poem "Mexicans Begin Jogging" to the story "Delfino II: Diez in the Desert". Both are written about similar themes, immigration, but the story has a more serious mood than the poem. ******** Both

*asked on January 19, 2016* -
## Physics

As part of a safety investigation, two 1200kg cars traveling at 24m/s are crashed into different barriers. Find the average force exerted on the car that hits a concrete barrier and takes 0.16s to stop.

*asked on December 7, 2014* -
## physics

98. On which of these hills does the ball roll down with increasing speed and decreasing acceleration along the path? (Use this example if you wish to explain to someone the difference between speed and acceleration.) 99. If you drop an object, its

*asked on June 11, 2014* -
## physiology

Pepsin would have the greatest activity... a.)when the pH of the chyme is greater than 3. b.)immediately upon entering the duodenum. c.)immediately upon secretion into the stomach. d.)when the pH of the chyme is less than 3.

*asked on December 10, 2011* -
## Art

What elements of painting are important to Renaissance artists?

*asked on September 17, 2011* -
## Math

A tourist in France wants to visit 10 different cities. How many different routes are possible?

*asked on October 29, 2009* -
## Social Studies!

2.) What is the name of the landform north of 40 degrees north latitude that juts out into the Atlantic like a giant fishhook? 3.) What flatlands extend south from the Cheapsake Bay to the east coast of Florida? 4.) From the top of which mountain range in

*asked on September 9, 2006* -
## US History

read the passage and answer the question below. “They expressed their great satisfaction, saying that no greater good could come to them than to have our friendship, and that they desired to live in peace with their enemies, and that we should dwell in

*asked on April 3, 2020* -
## Physics

A length 550cm of tin thread wraps around a cylinder exactly 25times. Calculate the circumference and the radius of the cylinder.

*asked on February 21, 2020* -
## Statistics

In a study of MP3 player popularity, 22% of people in a random sample of 1100 Americans age 12 and older indicated that they owned an MP3 player. The owners were 26% of the males and 18% of the females. Suppose that there were the same number of males and

*asked on May 2, 2018* -
## Chemistry

What is the value of [h3o] in a solution where [oh]=4.20x10^-6

*asked on November 14, 2016* -
## Math

Seth had a bag with 4 green, 5 yellow, and 6 blue marbles in it. If Seth draws a yellow marble and does not replace it, what is the probability that the second marble he draws is yellow?

*asked on November 5, 2014* -
## English

How could you use the words feel and turn as a linking verb?

*asked on January 14, 2014* -
## Physics

The equation of motion for an oscillator in vertical SHM is given by y=(0.60m)sin[(130rad/s)t]. Part A What is the amplitude of this motion? Part B What is the frequency of this motion? Part C What is the period of this motion?

*asked on December 10, 2013* -
## Algebra help!

1.) Solve the system by triangularizing the augmented matrix and using back substitution. -x-y+z=1 x-y-4z=-7 4x+y+z=6 2.) Perform the indicated row operation, then write the new matrix. -4 4 | 4 9 -6 | 5 -2R1+ R2 ---> R2 3.) Solve the system by

*asked on March 28, 2013* -
## Algebra

I need some help figuring these. Compute each product and simplify the result. I don't have the squareroot sign so put that meaning that's where it goes with the number after it. 1. (0.3 Squareroot of 5)^2 2. (2+ squareroot of 5)^2 3. (5+4Squareroot of

*asked on January 18, 2013* -
## Algebra

Rationalize each expression by building perfect nth root factors for each denominator. Assume all variables represent positive quantities. I don’t understand how to compute these. Also I don’t have the square root sign so I typed it out where it would

*asked on January 18, 2013* -
## Algebra

I need some help figuring these. Compute each product and simplify the result. I don't have the squareroot sign so put that meaning that's where it goes with the number after it. 1. (0.3 Squareroot of 5)^2 2. (2+ squareroot of 5)^2 3. (5+4Squareroot of

*asked on January 18, 2013* -
## Calculus

Let R be the region bounded by y=x^2, x=1, and y=0. Use the shell method to find the volume of the solid generated when R is revolved about the line x=-11.

*asked on January 29, 2012* -
## quadratic equations

Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour and your city is the first stop on the tour. You need to supply information about projected ticket sales to the box office

*asked on January 24, 2012* -
## Calculus

Find the volume of the solid generated by revolving the following region about the given axis. The region in the first quadrant bounded by the curve y=x^2, below by the x-axis, and on the right by the line x=1, about the line x=-2

*asked on January 24, 2012* -
## Calculus

Use the disk method to find the volume of the solid generated when the region bounded by y=15sinx and y=0, for 0

*asked on January 24, 2012* -
## Chemistry

A sample of steam with a mass of .550 g and at a temperature of 1 degrees C condenses into an insulated container holding 4.40 g of water at 5.0 degrees C. Assuming that no heat is lost to the surroundings, what will be the final temperature of the

*asked on January 24, 2012* -
## chemistry

How much energy (in kJ) is released when 16.4 g of steam at 121.5 degrees C is condensed to give liquid water at 60.5 degrees C? The heat of vaporization of liquid water is 40.67 kJ/mol and the molar heat capacity is 75.3 J/(K*mol) for the liquid and 33.6

*asked on January 24, 2012* -
## quadratic equations

can you solve the equation using the quadratic formula x2 + 3x = 7? Explain and provide an exact answer.

*asked on January 17, 2012* -
## calculus

find the slope of the tangent line at the point P(1,1) on the graph of e^x-y=2x^2-y^2

*asked on January 17, 2012* -
## physics

A propeller spins at 1850 rev/min. (a) What is the angular velocity in rad/s? (b) What is the angular displacement of the propeller in 4.10 s?

*asked on November 28, 2011* -
## math

sig figs for.. 1.399 x by 10-3 0.0763 m2 212.080 g 673.133 K 6.69808e+06 cm

*asked on October 2, 2011* -
## physics

A playground carousel (“merry-go-round”) is free to rotate frictionlessly in the horizontal plane (and air resistance is negligible). Without riders, the carousel has a moment of inertia of 152 kg·m2. But there is a single rider, initially standing

*asked on November 1, 2010* -
## poetry

i need help with 3 more lines: "two boys were playing bythe curb, a trail of ants close by did swerve, the blazing sun beat down from on high, ------------------------ ------------------------ ------------------------

*asked on May 17, 2010* -
## music help PLZ

i am on windows media player tryin to make a mix cd. i made a playlist but i wanna cut some parts into smaller pieces like if i only want a certain part of the song then it will continue to the next song does any1 no how to do that ..Like how to cut the

*asked on April 18, 2010* -
## Math

Deandre deposits into an account that pays simple interest at a rate of per year. How much interest will he be paid in the first years?

*asked on February 26, 2010* -
## Math

At the first tri-city meeting, there are 8 people from town A, 7 people from town B, and 5 people from town C. If a council consisting of 5 people is randomly selected, find the probability that 3 are from town A and 2 are from town B.

*asked on October 29, 2009* -
## science

An unknown metal has a volume of 20cm^3 and a mass of 54g. What is the likely identity of the unknown metal? could i please have some help with this? ur help is appreciated. :D

*asked on September 29, 2009* -
## introduction to business

cit an instance in which a surplus of a product led to decreased price.

*asked on July 15, 2009* -
## History

Why were Americans interested in expansion northward?

*asked on October 8, 2008* -
## Algebra

I am not sure what this question is asking. Please help. Find two consective postitve intergers such that the sum of their squares is 85.

*asked on October 7, 2007* -
## Physics

A 215 g particle is released from rest at point A (the middle of one side) inside a smooth hemispherical bowl of radium 30.0 cm. Calculate the gravitational potential energy at A relative to B. (B is in bottom-middle of the bowl) Ok, so PE_g=mgh. How would

*asked on December 5, 2006* -
## Physics

Two students are on a balcony 19.6 m above the street. One student throws a ball vertically downward at 14.7 m/s. At the same instant, the other student throws a ball vertically upward at the same speed. The second ball just misses the balcony on the way

*asked on September 25, 2006* -
## Physics

A train travels between stations 1 and 2. The engineer of the train is instructed to start from rest at station 1 and accelerate uniformly between points A and B, then coast with a uniform velocity between points B and C, and finally accelerate uniformly

*asked on September 17, 2006* -
## algebra

which of the options is a counterexample to the given conditional statement. conditional statement: if x^2=25, then x=5 the options are x=10 none,the statement is true x=-5 x=-10 i think it’s C

*asked on May 23, 2020* -
## math

Two circles meet at A and B. A chord CD of one circle is produced to meet the other circle at E and F so that CDEF is a straight line, as shown. The common chord AB is produced to meet the line CF at a point M between D and E. If M is the midpoint of CF

*asked on July 21, 2019* -
## social studies

what are all the answers to lesson 4 unit 4 in connexus? I am stuck on this question after an excerpt- According to the excerpt, who had more power under the Articles of Confederation? 1) it gave a majority of the power to the national government, and

*asked on October 22, 2018* -
## Math

How do you evaluate 16(2^-3 - 4^-2)?

*asked on August 25, 2018* -
## Math

The dome over the town hall has a parabolic shape. I measure 48 m across and rises 12 m at its center. Determine the quadratic equation that models the shape of the parabola. I have learned the formula y = a(x-s)(x-t).

*asked on August 1, 2018* -
## Math

In the Doubles Game, students can win carnival tickets to spend on games and food. A player pays one ticket to roll two number cubes(six-sided dice). If the numbers match, the player wins five tickets. If a player plays this game 20 times, about how many

*asked on May 29, 2017* -
## Chem

Given the reaction: Fe2SiO4 (s) + 2 H2CO3 (aq) ----> 2FeCO3 (s) + H4SiO4 (aq). How many grams of Fe2SiO4 are required to completely react with 55.0 mL of .500 M H2CO3 (aq)?

*asked on March 7, 2017* -
## K12

Is anyone in K12 here or FLCCA that could help me in Algebra 2???

*asked on December 6, 2016* -
## Math

the top of a rectangular table has a length that is two times it's width. The perimeter of the tabletop is 144 inches. What is the width of the tabletop?

*asked on November 17, 2016* -
## Social Studies

Why did Adams increase the size of the American Navy? He wanted to prepare for all-out war on Britain He hoped it would deter more attacks by French ships He needed to use tax money to fund an increase in military spending Congress passed a law that

*asked on October 17, 2016* -
## Physics

Two positive charged spheres, one with 2 times the charge of the other are 38 cm apart. The net force between them is 0.77 N. What is the charge on the lesser charged sphere?

*asked on May 25, 2016* -
## Math

The ratio of the length of a rectangle to the width of a rectangle is 5:2 if the link is 45 centimeters what is the width of the rectangle in centimeters

*asked on May 17, 2016* -
## Spanish

PLEASE HELP!! I'm confused because I know that the conjugated form for "yo" is digo, but I think it might be decir also because its translated as I have to tell the truth, and decir means "to tell." Yo tengo que _______ la verdad. decir dicen decimos digo

*asked on April 26, 2016* -
## Geometry (PLEASE HELP!!!)

Please Please HELP!!!! I need the answer to this and i've worked it out but I don't know if it is correct... Please check my answer!!!! The polygons are regular polygons. Find the area of the shaded region to the nearest tenth. I can't post a picture of it

*asked on April 14, 2016* -
## Geometry

Please Please HELP!!!! I need the answer to this and i've worked it out but I don't know if it is correct... Please check my answer!!!! The polygons are regular polygons. Find the area of the shaded region to the nearest tenth. I can't post a picture of it

*asked on April 14, 2016* -
## Physical Science

Please check my answer!! I would be great if you could explain this to me a little as well... To find the amplitude, measure_____ a. the horizontal distance between consecutive positions b. the horizontal distance between a consecutive crest and trough c.

*asked on April 8, 2016* -
## Trigonometry

PLEASE HELP!! I really don't understand this...I just started learning about trigonometry and SOH CAH TOA and I think this probably has to do with that but I don't know how to apply it... Please explain this to me!!!! I need to know how to do it and not

*asked on March 30, 2016* -
## Math

A girl stands 7 meters away from a building. The angle of elevation from where she stands is 25 degrees. How tall is the Building?

*asked on March 6, 2016* -
## Physics

Please help me with this!! I am really confused about it... 1. A 75 kg. man steps off the end of a diving board, and hits the water at 7.7 m/s. Ignoring air resistance, what was the mans PE (potential energy) right before he stepped off the diving board?

*asked on February 29, 2016* -
## English grammar.

Please check my answer! What is the capitalized phrase? TO SCORE ACCURATELY, bowlers must learn what the terms spare, strike, and split mean. Infinitive phrase**** Gerund phrase Adverb phrase none of the above I though that the capitalized phrase was an

*asked on January 14, 2016* -
## Social Studies

Which of these factors MOST shaped American identity? A: The United States is located in North America. B: Aristocratic royal governors oversaw the earliest British colonies. C: Early colonists grew cash crops and replied on natural resources to survive.

*asked on November 10, 2015* -
## Chemistry

A solution is prepared by dissolving 0.1 mol of ethanoic acid (CH3COOH) in 500ml of water at 25 C. pKa of ethanoic acid is 4.7. What is the pH of the solution? I'm assuming the equation is pH = pKa + log[Base]/[Acid] but can't get it to work?

*asked on October 21, 2015* -
## Statistics

How do you find the p-value??? Thanks! In the past, 35% of the students at ABC University were in the Business College, 35% of the students were in the Liberal Arts College, and 30% of the students were in the Education College. To see whether or not the

*asked on June 19, 2015* -
## Chem

You made 100.0 mL of a lead(II) nitrate solution for lab but forgot to cap it. The next lab session you noticed that there was only 80.7 mL left (the rest had evaporated). In addition, you forgot the initial concentration of the solution. You decide to

*asked on April 19, 2015* -
## Inorganic chem

What mass of baking soda (NaHCO3) would be required to neutralize 10.00mL of 12.1M muriatic acid remaining in a empty water bottle?

*asked on April 16, 2015* -
## algebra 1

A town is organizing a parade. There will be floats of only 2 sizes, 30ft. and 15ft. A space of 10 ft. will be left after each float. a. the parade must be at least 150 feet long, but less than 200ft long. what is the combinations of large and small floats

*asked on January 9, 2015* -
## algebra 1

You have $100 to go shopping. A store sells shirts for $15 and dress shirts for $22. You want to spend no more then the amount of money you have. You want to leave at most $10 unspent. you need to buy at least one dress shirt. What are all the possible

*asked on January 9, 2015* -
## Multiplying Polynomials

Use the distributive property to write (each of) the following expression(s) as the sum of monomials. M. (t - 1)(t + 1)(t^2 + 1) I already know that I must multiply across, but I am a bit confused regarding the order to multiply in and which variables to

*asked on January 9, 2015* -
## Math

My locker combination has three digits. None of the digits are 0. What is the probability that the first digit of my locker combination is less than 3?

*asked on November 5, 2014* -
## Algebra

What are two numbers that add to 615 but multiply to -90000? I'm trying to factor the quadratic x^2+615x-90000

*asked on October 23, 2014* -
## Physics

An artillery shell is fired at an angle of 67.4◦ above the horizontal ground with an initial speed of 1560 m/s. The acceleration of gravity is 9.8 m/s2 . Find the total time of flight of the shell, neglecting air resistance. Find its horizontal range,

*asked on October 23, 2014* -
## algebra

Determine the value of each expression 25% of 200

*asked on April 3, 2014*