# brianna

Most popular questions and responses by brianna-
## Physics

An Australian emu is running due north in a straight line at a speed of 13.0 m/s and slows down to a speed of 10.9 m/s in 3.70 s. (a) What is the magnitude and direction of the bird’s acceleration? (b) Assuming that the acceleration remains the same,

*asked on September 2, 2013* -
## Consumer Math

Your parents are buying a house for $187,500. They have a good credit rating, are making a 20% down payment, and expect to pay $1,575/month. The interest rate for the motrgage is 4.65%. What must their realized income be before each month and how much

*asked on February 28, 2013* -
## Physics based Calculus

Bob has just finished climbing a sheer cliff above a beach, and wants to figure out how high he climbed. All he has to use, however, is a baseball, a stopwatch, and a friend on the ground below with a long measuring tape. Bob is a pitcher, and knows that

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

Sort these species into isoelectronic groups. It doesn't matter which group goes in which box, so long as the correct species are grouped. Ne Mg2+ S2- Ti4+ K+ He Li+ Be2+ N3-

*asked on November 6, 2014* -
## Physics

What is common to all light sources, including incandescent, fluorescent, neon, halogen, laser, and sodium vapor devices?

*asked on April 11, 2016* -
## chemistry/physics

If a rock climber accidentally drops a 69.0 g piton from a height of 305 meters, what would its speed be just before striking the ground? Ignore the effects of air resistance.

*asked on February 6, 2013* -
## science

A car travels 240km in 2hr. And the sprinter travels 100m in 9.5 seconds. which one is traveling faster and by how much ?

*asked on August 29, 2011* -
## Language Arts

15. Read the following lines from the story “Forbidden Fruit.” Of course, in childhood there were occasions when I could have tasted pork in kindergarten or ate at the home of a friend, but I never broke the commandment. When we had rice and pork in

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

Calculate the volume of 1.0 M CuSO4 stock solution you should use to make 100 mL of a 0.010 m CuSO4 solution.

*asked on September 1, 2016* -
## English

Which of the following quotes spoken by Juliet shows the strongest example of how she changes over the course of Romeo and Juliet? A. Madam I am here what is your will B. I'll look to like if looking liking move: but no more deep will I endart mine eye

*asked on April 5, 2016* -
## Physics

A child is pushing a shopping cart at a speed of 1.5 m/s. How long will it take this child to push the cart down an aisle with a length of 9.3 m?

*asked on September 14, 2010* -
## math

Which is M=300J/P solved for J? A. J=300PM B. J=300M/P C. J=300PM D. J=PM/300

*asked on April 29, 2014* -
## science

Consider a 1.50-g mixture of magnesium nitrate and magnesium chloride.After dissolving this mixture in water,0.500M silver nitrate is added dropwise until precipitate formation is complete. THe mass of the white precipitate formed is 0.641 g. a)Calculate

*asked on January 2, 2008* -
## Math

Marge bought a computer for $699 on the installment plan. The terms of the plan were a down payment of $100, then payments of $58 a month for 12 months. How much was her total cost?

*asked on June 15, 2016* -
## Chemistry

For the following electrochemical cell, Co(s)/Co2(aq,.0155M)// Ag+(aq,2.50M)/Ag(s) 1.Write the net cell equation. 2.Calculate the following values at 25 degrees celcius. Eocell, Ecell, deltaGo rxn, and delta Grxn

*asked on July 25, 2013* -
## A.P Chemistry

Three volatile compounds X,Y, and Z each contain elements Q. The precent by weight of element Q in each compound was determined. Some of the data obtained are given below Percent by weight Molecular Compound of Element Q Weight X 64.8% ? Y 73.0% 104. Z

*asked on October 23, 2006* -
## algebra

Across a horizontal distance of 25 feet, a roller coaster has a steep drop. The height of the roller coaster at the bottom of the drop is -125 feet, compared to its height at the top of the drop. What is the average amount that the roller coaster's height

*asked on October 8, 2018* -
## Language Arts

Read the following passage. Then answer the questions that follow. THE OLYMPIC SWIMMER Who will be the winner bold? Athletes from both far and near Train and Strain to be the best. But who will win the medal gold? Swimmers swivel, splash, and kick Back and

*asked on December 5, 2016* -
## Physics

I need help solving this please! I think that for part (b) I can use energy and wavelength to solve for frequency and the one with the highest frequency is the most damaging, but I'm not sure what to do for part (a). You want to study a biological specimen

*asked on August 15, 2010* -
## Physics

You design an engine that takes in 1.5 x 10^4 J of heat at 650 K in each cycle and rejects heat at a temperature of 350 K. The engine completes 240 cycles in 1 minute. What is the theoretical maximum power output of your engine? can you please also show

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

1. Find the 11th term of the geometric sequence 64, -32, 16, -8, … . 2. Find the 1st term of a geometric sequence with a 10th term -1024 and r = -2. 3. Find the sum of each infinite geometric series, if possible. a. 10 + 2 + 2/5 + ..... b. 1.2 – 2.4 +

*asked on October 7, 2014* -
## science

A drinking glass at a crime scene contains a clear colorless liquid that may be water or alcohol. As the investigator, you know that the densities of alcohol, water, and ice are 0.79g/mL, and 0.92/mL. Design a simple method to determine the identity of the

*asked on September 16, 2014* -
## Chemistry-Urgent

The partial pressure of CO2 inside a bottle of soft drink is 4.0 atm at 25°C. The solubility of CO2 is 0.12 mol/L. When the bottle is opened, the partial pressure drops to 3.0 ✕ 10-4 atm. What is the solubility of CO2 in the open drink? Express your

*asked on February 19, 2017* -
## physics

It takes a runner 3 h, 32 min, 26 s to run a marathon. If the distance of a marathon is 42.2 km, what is the average speed of the runner?

*asked on August 31, 2017* -
## Spanish

Un amigo te pregunta quiénes están haciendo varios trabajos. Responde sus preguntas con frases completas. 1. ¿Quién saca fotos? 2. ¿Quién apaga el incendio? 3. ¿Quién investiga el crimen? 4. ¿Quién sirve comida en el restaurante? 5. ¿Quién te

*asked on February 27, 2013* -
## Chemistry

A hot air balloon is filled with 1.31 × 106 L of an ideal gas on a cool morning (11 °C). The air is heated to 129 °C. What is the volume of the air in the balloon after it is heated? Assume that none of the gas escapes from the balloon.

*asked on October 14, 2014* -
## Algebra

A jet leaves the Charlotte, North Carolina, airport traveling at an average rate of 564 km/h. Another jet leaves the airport one half hour later traveling at 744km/h in the same direction. Use an equation to find how long the second jet will take to

*asked on October 13, 2011* -
## Texas History

How is urbanization related to popular culture as seen in Texas in the 1920s?

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

A current of 3.94 A is pass through a Pb(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 5.40 g of lead?

*asked on July 24, 2013* -
## Chemistry

Separate this redox reaction into its component half-reactions. O2 + 2Mg----> 2MgO

*asked on July 24, 2013* -
## Math

Charlie wants to buy a $500 TV in 9 months. How much should he invest now at 8% simple interest to have the money in 9 months?

*asked on April 30, 2014* -
## Physics question help/ check my answers

The middle two question please check my answers and tell me if I am correct or if there is something I am missing. The first and the last question I need help to understand and complete it. Thank you in advance!!! 1. What is the electric force between a +2

*asked on May 8, 2014* -
## Calculus

If C(x) = 18000 + 400x − 2.2x^2 + 0.004x^3 is the cost function and p(x) = 2800 − 7x is the demand function, find the production level that will maximize profit. (Hint: If the profit is maximized, then the marginal revenue equals the marginal cost.)

*asked on October 21, 2013* -
## A.P Chemistry

A rigid 5.00 L cylinder contains 24.5g of N2(g) and 28.0g of O2(g). (a). Calculate the total pressure, in atm, of the gas mixture in the cylinder at 298 K (b) The temperature of the gas mixture in the cylinder is decreased to 280 K. Calculate each of the

*asked on October 22, 2006* -
## Physics: Sound Waves

Two organ pipes, open at one end but closed at the other, are each. 1.14 m long. One is now lengthened by 2.00 cm. Find the frequency of the beat they produce when playing together in their fundamental.

*asked on July 16, 2010* -
## English

Which responses accurately state a central idea of The Tempest? (Select all that apply.) The Tempest The power of magic can be a force for good, but it is also complicated and too great a responsibility for any single person. Some people in life will

*asked on October 19, 2018* -
## Chem 2

At 25 °C only 0.0570 mol of the generic salt AB is soluble in 1.00 L of water. What is the Ksp of the salt at 25 °C?

*asked on July 18, 2013* -
## Geometry

A model is made of a car. The car is 9 feet long and the model is 6 inches long. What is the ratio of the length of the car to the length of the model?

*asked on March 17, 2016* -
## physics

A truck travels up a hill with a 7.2◦ incline. The truck has a constant speed of 19 m/s. What is the horizontal component of the truck’s velocity? Answer in units of m/s.

*asked on September 18, 2010* -
## Calculus

If C(x) = 18000 + 400x − 2.2x^2 + 0.004x^3 is the cost function and p(x) = 2800 − 7x is the demand function, find the production level that will maximize profit. (Hint: If the profit is maximized, then the marginal revenue equals the marginal cost.)

*asked on October 21, 2013* -
## Math

a cell phone company offers the following plan: monthly charge (which includes 500 minutes) for $40 and a charge for additional minutes will be 5 cents a minute. write a piecewise function function putting x&y terms that can be used in any # or minutes. I

*asked on October 17, 2015* -
## chemistry

3CuCl2-2H2O + 2AL--> 3Cu +2AlCl3+6H2O what is the thepretical yield or copper? then what is the limiting reagent and excess reagent? whats the percentage yield?

*asked on November 25, 2010* -
## physics HELP

A sailboat starts from rest and accelerates at a rate of 0.18 m/s2 over a distance of 494 m. (a) Find the magnitude of the boat's final velocity. (b) Find the time it takes the boat to travel this distance.

*asked on September 19, 2017* -
## chem

A weather balloon is filled with helium that occupies a volume of 4.33 104 L at 0.995 atm and 32.0°C. After it is released, it rises to a location where the pressure is 0.720 atm and the temperature is -10.2°C. What is the volume of the balloon at that

*asked on March 23, 2017* -
## English

Canto VIII of the epic poem Beowulf is structured as a dialogue between Unferth and Beowulf. Which responses accurately describe the impact Canto VIII has on the overall meaning of the epic poem? (Select all that apply.) Beowulf A. The boastful dialogue

*asked on October 15, 2018* -
## math

Jose invests 3250 dollars at 6% interest compounded annually. What will be the balance in the account after 3.5 years? A. 3932.50 dollars B. 3985.23 dollars C. 4752 dollars D. 5200 dollars

*asked on May 1, 2014* -
## Kimpton

what is a repetitious, overwritten sentence called

*asked on January 19, 2009* -
## Math

A room measures 450cm by 350cm. Find the side if the largest square tile that can be used to tile without cutting

*asked on November 20, 2014* -
## History

What did Otto Von Bismarck do to help unify Germany? He sponsored the development of a nationalistic education focusing on the achievements of the German people. He helped create wars with neighboring countries to increase national pride among the German

*asked on October 18, 2018* -
## Algebra

Simplify (6x^-2)^2(0.5x)^4. I have no idea how to do this!, please help!

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

According to King, how did the Vietnam War affect U.S. policy at home?

*asked on April 20, 2013* -
## world history

Which of the following is true of the Antarctic Treaty System? A. It bans commercial mining in Antarctica. B. It's actually the Society for the Geographic Exploration of Antarctica. C. It was established specifically to enforce ecological regulations. D.

*asked on November 19, 2013* -
## science

I can travel where there are no molecules, but never through a brick. I can travel through space, but never around a corner. What am I?

*asked on September 26, 2007* -
## AP Physics

Two blocks are connected by a string over a frictionless, massless pulley such that one is resting on an inclined plane and the other is hanging over the top edge of the plane. The hanging block has a mass of 16 kg and the one on the plane has a mass of 8

*asked on October 15, 2015* -
## College Physics

A child swings a yo-yo of weight mg in a horizontal circle so that the cord makes an angle of 30 degrees with the vertical. Find the centripetal acceleration.

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

what are the component parts of modern fireworks? what does each part do?

*asked on September 18, 2014* -
## physics

The current in a lightning bolt is 1.6 105 A. How many coulombs of charge pass through a cross-sectional area of the lightning bolt in 0.70 s? I don't know how to set this up???

*asked on May 16, 2012* -
## English

Which responses explain how affixes change the world guise to another part of speech? (Select all that apply.) A. Adding the prefix dis- and the suffix -ly creates the adverb disguisedly. B. Adding the prefix dis- and the suffix -ment creates the adjective

*asked on October 15, 2018* -
## ECON

If you save $250 each year for the next 20 years, how much money would you have if you earned 9%?

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

It is estimated that in the United States (population 250 million) there is one electric clock per person, with each clock using energy at a rate of 3.5 W. Using this estimate, how much energy is consumed by all the electric clocks in the United States in

*asked on May 16, 2012* -
## American Government

Has anyone done the Memo to the president portfolio? I am like...really stuck on it.

*asked on December 1, 2016* -
## math

a rope is cut into three pieces P,Q and R.the lengths of the pieces are in the ratio 3:5:7.if the is 33 feet and 9 inches long,find the lengths of P,Q, and R

*asked on December 11, 2013* -
## chem

The pressure in an automobile tire is 1.89 atm at 24.0°C. What will be the pressure if the temperature increases to 38.0°C? i alreaddy got 1.89/24.0. i dont know where to go from there

*asked on March 21, 2017* -
## math

Laura drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 6 hours. When Laura drove home, there was no traffic and the trip only took 4 hours. If her average rate was 22 miles per hour faster on the trip home,

*asked on September 23, 2015* -
## science

The density of liquid oxygen at its boiling point is 1.14 \rm{kg/L} , and its heat of vaporization is 213 \rm{kJ/kg} . How much energy in joules would be absorbed by 4.0 L of liquid oxygen as it vaporized?

*asked on September 7, 2010* -
## math

Rihanna planned a rectangular courtyard for a park and made a scale drawing using inches as the unit of measurement. She originally planned for the length of the actual courtyard to be 54 feet, but she decided to change it to 72 feet. If the length of the

*asked on September 7, 2016* -
## Algebra

The variable Z is directly proportional to X. When X is 6, Z has the value 72. What is the value of Z when X = 13

*asked on July 24, 2016* -
## Pre algebra

what is another way to write to 72 - (-25) A. 72+25 B. -72 -25 C. 72 - 25 D. - 72 - (-25) what is the value of - 27 - 8 A. - 35 B.-19 C. 19 D. 35

*asked on August 21, 2019* -
## ASAP Physics

A small first-aid kit is dropped by a rock climber who is descending steadily at 1.6 m/s. (a) After 3.5 s, what is the velocity of the first-aid kit? (b) After the 3.5 s, how far is the kit below the climber?

*asked on September 27, 2017* -
## Physics

If ^235U (235.043930 u) is struck by a neutron it undergoes fission producing ^144 Ba (143.922953 u), ^89 Kr (88.917630 u) and three neutrons (1.0086649 u). (a) Calculate the energy in MeV released by each fission reaction. (b) Calculate the energy

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

In what proportion should you combine 2:5 soaking solution and distilled water to create 1:20 solution?

*asked on March 25, 2017* -
## Chemistry

What is the limiting reagent when 10.8 g water reacts with 4.7 g Na to produce NaOH and H2?

*asked on January 29, 2013* -
## Business 101

Carmen Santiago works for a number of businesses as a “consultant.” She has helped design accounting systems, provided accounting services, and analyzed the financial strength of her clients’ businesses. Carmen is working as a A.public accountant

*asked on February 6, 2012* -
## Algebra

The sum of two consecutive even integers is 118. A. Define a variable for the smaller integer. B. What must you add to an even integer to get the next greater even integer? C. Write an expression for the second integer. D. Write and solve an equation to

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

Determine the number of grams of oxygen in 13 grams of calcium acetate.

*asked on October 19, 2014* -
## Algebra

Ramiro earns $20 per hour during the week and $30 per hour for overtime on the weekends. One week Ramiro earned a total of $650. He worked 5 times as many hours during the week as he did on the weekend. Write and solve a system of equations to determine

*asked on December 10, 2013* -
## physics

A parachutist with a camera, both descending at a speed of 14 m/s, releases the camera at an altitude of 31.7 m. What is the magitude of the velocity of the camera just before it hits the ground? The acceleration of gravity is 9.8 m/s 2 and air friction is

*asked on September 12, 2013* -
## Spanish

Un amigo te pregunta quiénes están haciendo varios trabajos. Responde sus preguntas con frases completas. 1. ¿Quién saca fotos? 2. ¿Quién apaga el incendio? 3. ¿Quién investiga el crimen? 4. ¿Quién sirve comida en el restaurante? 5. ¿Quién te

*asked on February 27, 2013* -
## physics

A net charge of 47 mC passes through the cross-sectional area of a wire in 19.0 s. (a) What is the current in the wire? 1 A (b) How many electrons pass the cross-sectional area in 1.0 min? 2 . electrons I got 9.3e+22 for B but its wrong

*asked on May 16, 2012* -
## help physics

It takes a runner 3 h, 32 min, 26 s to run a marathon. If the distance of a marathon is 42.2 km, what is the average speed of the runner?

*asked on August 31, 2017* -
## History

Mark the statement if it describes Roman society during the time of Cincinnatus. A. Rome’s government was based on law in which many people had a voice. B. Rome was being surrounded and threatened by outside forces. C. People in Rome admired those who

*asked on May 5, 2014* -
## language arts

complete the analogies by selecting a pair of words whose relationship most resembles the relationship of the pair in capitol letters. BRUSQUE:BRUSQUENESS:: a. simulated:simulation b. foolish:inanity c. angry:tirade **i think its "a" but im not sure

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

Which one of the following sentences correctly uses a comparative adjective? A. Of the three girls, Janet is the better speaker. B. Alicia is a gooder swimmer than Marilynn. C. George has a bigger appetite than Harry. D. This is the worse picture I've ever

*asked on August 19, 2014* -
## chemistry

A certain rifle bullet has a mass of 6.45 g. Calculate the de Broglie wavelength of the bullet traveling at 1817 miles per hour.

*asked on November 1, 2013* -
## Chemistry

What is the [H3O] concentration in a 1.0M CH3COONa solution? (The Ka for CH3COONa is 2.0*10-5.)

*asked on February 24, 2012* -
## Math

What are the proceeds for a discounted loan for $300 repaid in 8 months at 17%?

*asked on April 30, 2014* -
## chemistry

A 2.50-g sample of powdered zinc is added to 100.0 mL of a 2.00-M aqueous solution of hydrobromic acid in a calorimeter. The total heat capacity of the calorimeter and solution is 448 J/°C. The observed increase in temperature is 21.1 °C at a constant

*asked on October 27, 2013* -
## AP World History

What reasons might there be for the timing, rapidity, and direction of Muslim territorial expansion? Ughhh, I searched the chapter in the textbook, the chapter outline on the packet and google and I'm getting so stressed out, someone please help me?

*asked on January 26, 2012* -
## Algebra

Using each of the following scales, find the dimensions in a blueprint of an 8ft-by-12ft room. 1. 1 in.:2ft 2. 1 in.:4ft

*asked on October 13, 2011* -
## A.P Chemistry

A different rigid 5.00L cylinder contains 0.176mol of NO(g) at 298 k. A 0.176mol sample of 02(g) is added to the cylinder, where a reaction occurs to produce NO2(g) (d) write the balanced equation for the reaction. (e) calculate the total pressure, in atm,

*asked on October 23, 2006* -
## 3rd grade math

what is standard form ? and What is expanded form ?

*asked on August 16, 2011* -
## physics

In ammonia (NH3) molecule, the three hydrogen atoms form an equilateral triangle, the distance between the centers of the atoms being 16.28x10^-11 m, so that the center of the triangle is 9.40x10^-11 m from each hydrogen atom. The nitrogen atom is at the

*asked on October 10, 2011* -
## Chemistry Stoichiometry

Sulfuric acid can dissolve aluminum metal according to the following reaction. Suppose you wanted to dissolve an aluminum block with a mass of 25.7 . How many grams of H2 gas would be produced by the complete reaction of the aluminum block?

*asked on October 27, 2012* -
## geography

cultural exchange between nations has been as a result of technological advances

*asked on December 20, 2011* -
## chemistry

The molar mass of magnesium carbonate, MgCO3, is 84 g/mole. How many moles are in 12.60 g of magnesium carbonate?

*asked on December 5, 2009* -
## algebra

mary wants to put square tiles on the kitchen floor. The tile she has selected is 12 inches on each side and comes in boxs of20 tiles for $54 per box. Her kitchen is 15 feet 8 inches log and 5 feet 9 inches wide. How many boxes of tile will she need and

*asked on September 2, 2014* -
## Calculus 1

Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about the specified axis. y=8-x^2, y= x^2 ; about x=2 V=?

*asked on November 24, 2013* -
## physics

A car starts from rest and travels for 4.1 s with a uniform acceleration of +1.4 m/s2. The driver then applies the brakes, causing a uniform acceleration of -1.8 m/s2. The breaks are applied for 1.80 s.

*asked on September 19, 2017* -
## Chemistry

The equilibrium constant for the reaction of the weak base aniline is Kb = 4.3e-10. C6H5NH2 (aq) + H2O (l) --> C6H5NH3+ (aq) + OH- (aq). Calculate ΔG at 298 K when [C6H5NH2] = 0.250 M, [C6H5NH3+] = 1.0E-5 M, [OH-] = 0.000480 M i used the equations dG=dG^o

*asked on March 25, 2014* -
## Calculus 1

Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about the specified axis. y=8-x^2, y= x^2 ; about x=2 V=?

*asked on November 24, 2013*