# joshua

Most popular questions and responses by joshua-
## chemistry

Potential of a cell is 0.1776 volts Pb|Pb2+(??M)||Pb2+(1.0M)|Pb I know i have to use Nernst's equation .. i just have no clue how to attempt this :S

*asked on March 29, 2011* -
## Chemistry

Calculate the pH of (1)0.150M KC2H3O2: (2)0.200M pyridine chloride, C5H5NHCl: and(3) 0.500M NaCl

*asked on February 21, 2011* -
## chem

The dibasic compound B (pKb1 = 4.00, pKb2 = 8.00) was titrated with 1.00 M HCl. The initial solution of B was 0.100 M and had a volume of 100.0 mL. Find the pH at the following volumes of acid added and make a graph of pH versus Va; Va=0, 1, 5, 9, 10, 11,

*asked on January 22, 2018* -
## home economics

mention the types of disposal of fullness?

*asked on February 7, 2013* -
## Chemistry

how many molecules of sulphuric acid is needed to neutralize 5ml of potassium bicarbonate (iv)acid when calcium is heated at temperature 200 calcius using nickel as catalyst

*asked on January 6, 2018* -
## Math

Name the point with the given coordinates (4,-2).

*asked on March 5, 2017* -
## ss

the aztec capital of tenochtitlan stood on the present-day A.Los Angeles B.Panama City C.Mexico D.Tikal

*asked on April 17, 2015* -
## Pysics

A wooden bucket ﬁlled with water has a mass of 59 kg and is attached to a rope that is wound around a cylinder with a radius of 0.071 m. A crank with a turning radius of 0.29 m is attached to the end of the cylinder. What minimum force directed

*asked on December 7, 2012* -
## Math

Sierra spent 2/3 of her earnings on clothes and 1/5 on school supplies. She saved the rest. What fraction of her earnings did she save?

*asked on February 11, 2014* -
## Science math

Suppose a laboratory has a 38 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of polonium-210 occur in 1104 days? How much polonium is in the sample 1104 days later?

*asked on January 7, 2013* -
## physics

A student, late for class, ran up some stairs between landings, which are 11.3 m apart. The student’s mass is 62 kg and it took 6.02 s to do the run. What is the average power that the student generated during the run?

*asked on December 10, 2014* -
## Physics

A circuit employs a silicon solar cell to detect flashes of light lasting 0.25 s. The smallest current the circuit can detect reliably is 0.32 μA . Assuming that all photons reaching the solar cell give their energy to a charge carrier, what is the

*asked on May 6, 2016* -
## Ancient Civilization

What is a mixture of sand, lime and water and used as lubricant to move stones in ancient egyptian civilization? Slurry is a nice word.

*asked on May 22, 2007* -
## Science

A gun fires a shell at an angle of elevation of 30 degrees with a velocity of 2*10^3m/s. What is the horizontal and vertical component of the velocity? What is the range of the shell? how high will the ball rise

*asked on September 29, 2012* -
## Chemistry

A 100.0 g sample of water at 27.0°C is poured into a 77.4 g sample of water at 89.0°C. What will be the final temperature of the water?

*asked on March 14, 2013* -
## Math

If there are 600 people in a concert audience, 3/10 are male and 5/6 are older than 10 years of age,how many people in the audience are female

*asked on February 12, 2019* -
## Physics

Two identical loudspeakers are 2 m apart. A person stands 4.6 m from one speaker and 3.4 m from the other. What is the lowest frequency at which destructive interference will occur at this point?

*asked on November 22, 2016* -
## English arts 1 Nouns

Aaron plans to attend college once he completes this course workbook. im suppose to identify the nouns in the sentence the nouns are Aaron,college,workbook right? im debating on course idk? help lol

*asked on May 3, 2012* -
## Calculus

I wanted to confirm that I solved these problems correctly (we had to convert the polar curves to Cartesian equations). 1.rcos(theta)=1 x=1 2.r=2*sin(theta)+2*cos(theta) r^2=2rsin(theta)+2rcos(theta) x^2+y^2=2y+2x (a little unsure what do next if this is

*asked on March 13, 2009* -
## Pre-Calculus

Find all of the fifth roots of 32i?

*asked on March 29, 2018* -
## ancient civilization

what is a mummy shaped amulet that held farm tools.....it starts with the letter S? Thank you for using the Jiskha Homework Help Forum. It's interesting to note that this was a crossword puzzle word! Here's the answer: These statuettes would be placed in a

*asked on May 22, 2007* -
## PHYSICS

on a partime job you are asked to bring a cylindrical iron rod of legnth 85.8 cm and diameter 2.85 cm from a storage room to a machinist. will you need a cart? (to answer calculate the weight of the rod.)

*asked on July 22, 2016* -
## English

can someone who is knowledgeable in english literature please check my answers thank you. 1.)which of the following phrases from ''the rear-guard'' is an oxymoron? a.''blackening wound'' b.''stinking place'' c.''rosy gloom'' d.''unanswering heap'' i chose

*asked on March 17, 2019* -
## English

london by william blake poem i wander through each chartered street, near where the chartered thames does flow, and mark in every face i meet marks of weakness,marks of woe.in every cry of every man,inevery infant's cry of fear,in every voice,in very

*asked on March 19, 2019* -
## Physics

A 95 kg halfback makes a turn on the football field. The halfback sweeps out a path that is a portion of a circle with a radius og 12 meters. The halfback makes a quarter of a turn around the circle in 2.1 seconds. Determine the speed, acceleration and net

*asked on May 9, 2017* -
## physics

A motorcycle (mass of cycle plus rider = 3.0 102 kg) is traveling at a steady speed of 20 m/s. The force of air resistance acting on the cycle and rider is 1.8 102 N. Find the power necessary to sustain this speed under the following conditions. (a) the

*asked on October 26, 2010* -
## English

can someone please check my answers 1.what is the best way to figure out a poem's theme? a.look for a line in which the poet states the theme directly. b.infer the theme from details,images,and symbols. c.analyze the rhyme scheme and meter of the poem.

*asked on December 4, 2018* -
## Math

figure RSTU is a rectangle. if m of angle SUT = 3x + 6 and m of angle RUS = 5x - 4, find m of angle SUT

*asked on December 2, 2016* -
## English

can someone please check my answers 1.)what is the best way to figure out a poem's theme? a.look for a line in which the poet states the theme directly b.infer the theme from details,images,and symbols c.analyze the rhyme scheme and meter of the poem d.use

*asked on March 25, 2019* -
## English

can someone please check my answers 1.what is the best way to figure out a poem's theme? a.look for a line in which the poet states the theme directly. b.infer the theme from details,images,and symbols. c.analyze the rhyme scheme and meter of the poem.

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

to marguerite-continued by matthew arnold poem yes in the sea of life enisled,with echoing straits between us thrown,dotting the shoreless watery wild,we mortals live alone.the islands feel the enclasping flow,and then their endless bounds they know.but

*asked on March 22, 2019* -
## ENGLISH (ESSAY)

ESSAY ON THE TOPIC THE HARMATTAN

*asked on November 19, 2017* -
## History

What aspects of european society did the church dominate from 1100 to 1300?

*asked on October 20, 2007* -
## English

Which Of The Following Descriptions From ''The Mirror'' Is An Example Of Personification? A. The Mirror Is Silver And Exact. B. The Candles And Moon Are Liars. C.The Opposite Wall Is Pink With Speckles. D.A Women's Face Replaces Darkness. This Is From

*asked on March 18, 2018* -
## Further maths

The 7th term of an A.p is 20 and the 13th term is 38 find the ,1,70thterm ,2,11thterm

*asked on November 30, 2011* -
## ENGLISH

Which Of The Following Lines Best Demonstrates The Tone Of The Nymph's Reply To The Shepherd By Sir Walter Raleigh? a.the flowers do fade and wanton fields/to wayward winter reckoning yields. b.then these delights my mind might move/to live with thee and

*asked on July 12, 2018* -
## physics

a jet airliner moving initially at 3..00X10^2 mi/h due east enters a region where the wind is blowing 1.0 x 10^2 mi/h in a direction 30 degrees north of east. A) find the components of the velocity of the jet airliner relative to the air. b) find the

*asked on October 2, 2011* -
## Further math

The sum of the 3rd and 7th term of an AP is 38 and the 9th term is 37. Find the AP.

*asked on February 24, 2019* -
## Chem Uni. Urgent!!!

Have to find theoretical yield of recrystallization of acetanilide from water. 1 gram of crude product used (85% acetanilide, 14% Sodium chloride and 1% charcoal) I got 0.50 grams of purified product. With percent recovery of : (0.50g/1.00g)* 100% = 50%.

*asked on February 3, 2015* -
## Science

why would a piece of wood float on water and sink in methylated spirit

*asked on October 23, 2017* -
## Physics

A horizontal massless beam of length 1 m is supported at two points. One fulcrum is at one end of the beam, point "O", and the other at the 0.60m point "P". Two equal weights are placed on the beam, one at O and one at point Q at distance x from O. Find

*asked on June 20, 2011* -
## Physics

An infinite thread of charge density lamda lies along Z axis. The potential difference between the points A(4,3,4) and B (3,4,0)is?

*asked on March 21, 2011* -
## English

to marguerite-continued by matthew arnold poem yes in the sea of life enisled,with echoing straits between us thrown,dotting the shoreless watery wild,we mortals live alone.the islands feel the enclasping flow,and then their endless bounds they know.but

*asked on March 20, 2019* -
## Physics mechanics

Two identical 17.7-kg balls, each 23.9 cm in diameter, are suspended by two 35.0-cm wires as shown in the figure (Figure 1) . The entire apparatus is supported by a single 18.0-cm wire, and the surfaces of the balls are perfectly smooth. what is the

*asked on February 8, 2016* -
## Algebra

You earn $250 per month from your part-time job. You are in a kayaking club that costs $20 per month, and you save at least $100 each month. Write and solve an inequality to find the possible amounts you have left to spend each month.Can someone please

*asked on October 22, 2014* -
## college

A train is heading due west from St. Louis. At noon, a plane flying horizontally due north at a fixed altitude of 4 miles passes directly over the train. When the train has traveled another mile, it is going 80 mph, and the plane has traveled another 5

*asked on December 6, 2010* -
## Ancient civilization

What is a translucent stone used in floor slabs in ancient egyptian civilization? If you'll go to http://www.google.com and enter translucent stone egyptian, you'll find the answer. =) http://touregypt.net/magazine/mag06012001/magf5.htm

*asked on May 22, 2007* -
## English

1.)The Narrator's Attitude In ''The Girl Who Wouldn't Talk '' When She Begins To Antagonize The Quiet Girl Is That The Quiet Girl A. Is Deliberately Trying To Make The Girl Mad. B. Needs A Companion To Talk To. C.Is Not Very Intelligent. D.Is Weak And

*asked on March 18, 2018* -
## math

A snail climbs a wall that is 16 feet high. Each day the snail climbs 5 feet, but each night it slips back down 3 feet. How many days will it take for the snail to get to the top of the wall

*asked on May 19, 2010* -
## Math

If a negative number is raised to an even exponent, what's the sign of the answer? How do you know? d. If a negative number is raised to an odd exponent, what's the sign of the answer? How do you know?

*asked on August 28, 2018* -
## math

Manday read that the arm of the Statue of Liberty is 42 ft long. She would like to know how long the Statue of Liberty’s nose is. How would you advise her to proceed?

*asked on August 22, 2009* -
## math

Cynthia has a bag of jellybeans. There are two red jellybeans, one yellow jellybean, and two black jellybeans in her bag. Cynthia grabs two jellybeans and gives them to her friend, Pedro, and he eats them. What is the probability that she gives him two red

*asked on May 3, 2016* -
## English-metaphors

Is this quote a metaphor? "That's a bright direction, there's a glowing there." In context it seems like a metaphor since the direction she is looking in is not actually bright or glowing. there was a lot of text for the question but I thought it e too

*asked on February 20, 2012* -
## algebra

Two cars are driving toward each other from opposite directions. If one is driving 55 mph, the other is driving 60 mph and the cars are 500 miles apart, how long will it be before they pass each other? Round to the nearest tenth of an hour

*asked on January 2, 2011* -
## Phyics

A Rock Is Thrown Vertically upward with a speed of 12m/s. Exactly 1.00s later a ball is thrown up vertically along the same path with a speed of 18m/s. At what time will they strike each other? so far I got this but it does not seem to be working out for

*asked on September 16, 2009* -
## English

1.) In ''Game'' Donald Bartheleme Is Satirizing All Of The Following Except A .Nature B.Materialism. C.Politics D.Violence This Is From The Story Game By Donald Bartheleme I Chose C But I Think It Can Also Be A

*asked on March 18, 2018* -
## math

if 4.5 pounds of cherries cost $10, what is the unit price per pound

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

eva wants to make two pieces of pottery. She needs 3/5 pound of clay for one piece and 7/10 pound of clay for the other piece. She has three bags of clay that weigh 4/5 pound a piece. How many bags of clay will eva need? How many pounds of clay will she

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

A swimmer bounces straight up from a diving board and falls feet first into a pool. She starts with a velocity of 3.00 m/s, and her takeoff point is 1.10 m above the pool. (a) How long are her feet in the air? s (b) What is her highest point above the

*asked on September 17, 2014* -
## College Physics

1. In a region of two-dimensional space, there are three fixed charges: +1 mC at (0, 0), −2 mC at (18 mm, -3 mm), and +3 mC at (-8 mm, 12 mm). What is the net force on the −2-mC charge? Find the magnitude and direction (counterclockwise from the

*asked on July 9, 2013* -
## chemistry

is this the right anser? for this problem please let me know thanks calculate the amount of heat in kilojoules released when 50 grams of steam at 125 C are converted to 50 grams of ice at -125 C so 50 grams of H2O Ti= 124 C Tf= -125 C q=? J=? q=m *Cp * At

*asked on October 27, 2008* -
## English

can someone please check my answers 1.what is the best way to figure out a poem's theme? a.look for a line in which the poet states the theme directly. b.infer the theme from details,images,and symbols. c.analyze the rhyme scheme and meter of the poem.

*asked on December 13, 2018* -
## First Year Chemistry

I have a question that I don't understand from my first year chem lab. Calculate the minimum volume of water needed to decompose all the excess Ethanoic Anhydride. Recall: 1.0g of H2O = 1.0 ml of water. How do I go about doing this?

*asked on March 11, 2012* -
## English

can someone please check my answers 1.) which of the following is the best example of a paradox? a.death be not proud ,though some have called thee/mighty and dreadful. b.though art a slave to fate,chance,kings and desperate men. c.and death shall be no

*asked on September 10, 2018* -
## Algebra 1

Emmanuel was speaking with a friend from another country. His friend told him that the speed limit on most highways is 100 kilometers per hour in her country. This speed sounded fast to Emmanuel. Approximately what speed is this in miles per hour? Round to

*asked on September 26, 2016* -
## Physics

A steel ball is dropped onto a hard floor from a height of 1.80 m and rebounds to a height of 1.64 m. (Assume that the positive direction is upward.) (a) Calculate its velocity just before it strikes the floor. m/s (b) Calculate its velocity just after it

*asked on September 17, 2014* -
## Chemistry

Calculate the pH of (1)0.150M KC2H3O2: (2)0.200M pyridine chloride, C5H5NHCl: and(3) 0.500M NaCl

*asked on February 21, 2011* -
## science

The living plants that are most similar to the first plants to bear gametangia are the _____. a) charophyceans b) seedless vascular plants c) angiosperms d) gymnosperms e) bryophytes

*asked on September 22, 2009* -
## MATH

A G.PIS SUCH THAT THE 3RD TERM IS 9TIMES THE FIRST TERM,WHILE THE 2ND TERM IS ONE TWENTY FOURTH OF THE 5TH TERM.FIND ITS 4TH TERM

*asked on April 8, 2019* -
## Algebra

Dylan has 765 cards in his baseball card collection. He sells 153 of the cards. What is the percent of decrease in the number of cards in the collection?

*asked on November 14, 2017* -
## Physics 2 Please help

The figure below shows two points in an E-field: Point 1 is at (X1,Y1) = (3,4) in m, and Point 2 is at (X2,Y2) = (12,9) in m. The Electric Field is constant, with a magnitude of 68 V/m, and is directed parallel to the +X-axis. The potential at point 2 is

*asked on February 2, 2017* -
## chemistry

85.0 of is initially at room temperature (22.0). A chilled steel rod at 2.0 is placed in the water. If the final temperature of the system is 21.2, what is the mass of the steel bar? Specific heat of water = 4.18 Specific heat of steel = 0.452 My answer

*asked on March 26, 2013* -
## Chemistry

What is the concentration of a monoprotic weak Acid if its pH is 5.50 and its Ka= 5.7 x 10^-10?

*asked on July 28, 2016* -
## Math

A rectangular solid has a base area of 43.3 sq inches and a height of 50 inches a triangular prism has a base in the shape of an equilateral triangle and a height of 50 inches. the volumes for both shapes are equal. find the side of the equilateral

*asked on May 12, 2012* -
## Statistics and Probability

All printed circuit boards (PCB) that are manufactured at a certain plant are inspected. An analysis of the company’s record shows that 22% of all PCBs are flawed in some way. Of those that are flawed, 84% are reparable but the rest must be discarded. If

*asked on October 25, 2010* -
## Physics - URGENT

A boat travels at 3.8 m/s and heads straight across a river 240m wide at an angle of 145'. The river flows at 1.6 m/s. a. What is the boat's resultant speed with respect to the river bank? b. How long does ti take the boat to cross the river? c. How far

*asked on October 19, 2009* -
## calc.

I'm having a lot of trouble with this problem: Sketch the graph and show all local extrema and inflections. f(x)= (x^(1/3)) ((x^2)-175) I graphed the function on my graphing calculator and found the shape. I also found the first derivative: (7/3)(x^(4/3))

*asked on April 20, 2009* -
## Pysics

A mother and daughter are on a seesaw in the park. How far from the center must the 127 lb mother sit in order to balance the 49 lb daughter sitting 7 ft from the center?

*asked on December 7, 2012* -
## algebra

A train left Podunk and traveled north at 75km/h. Two hours later, another train left Podunk and traveled in the same direction at 100 km/h. How many hours had the first train travelee when the second overtook it?

*asked on January 8, 2009* -
## chemistry/please double check

Hi, I just need to know if I finally got this exercise right. Calculate the amount of heat in kilojoules released when 50 grams of steam at 125 Celsius are converted to 50 grams of ice at -125 Celsius. so, qw= 50*4.184J/g C (125 C-o)= 26.15 x 10^3 qi=

*asked on October 28, 2008* -
## History

Was pope gregory justified in excommunicating Henry? explain?

*asked on October 20, 2007* -
## Chemistry

Perchloric acid, HClO4, is a strong acid. What are the pH values of the following solutions: a) 3 M perchloric acid b) 0.1 M perchloric acid c) 0.001234 M perchloric acid d) 10-5 M perchloric acid e) 10-9 M perchloric acid is the pH -log(conc. ?

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

A car travels at a constant speed around a circular track whose radius is 3.1 km. The car goes once around the track in 280 s. What is the magnitude of the centripetal acceleration of the car?

*asked on September 30, 2010* -
## Physics

A boat travels at 3.8 m/s and heads straight across a river 240m wide at an angle of 145'. The river flows at 1.6 m/s. a. What is the boat's resultant speed with respect to the river bank? b. How long does ti take the boat to cross the river? c. How far

*asked on October 19, 2009* -
## English

''Son'' Is Told In A. Chronological Order. B. Fragments That Are Set In Different Time Periods. C.Segments, Each Told By A Different Character. D. Reverse Chronological Order, From Present To Past. This Is From The Story Son By John Updike Its Either B Or

*asked on March 18, 2018* -
## Physics

You get a summer internship working with a 589.2nm laser (an intense light source with a very well defined wavelength). You want to spray some oil with noil=1.25 on your glasses with nglass=1.50 as an additional safety feature to protect you from

*asked on March 4, 2017* -
## math

A student is attempting to factor a polynomial. Sample mathematical work is shown below. Which statement best applies to the sample mathematical work? Given 3x + 6, the factors of the first term are 3 and x, and the factors of the second term are 1, 2, 3,

*asked on September 22, 2014* -
## Algebra2

The area of a rectangular field is x^2-x-72 m^2. The length of the field is x+8 m. What is the width of the field in meters?

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

What is the greatest amount of money you could leave for a tip if... 1.no paper money is left 2.with the coins tat are left, change cannot be ;made for a quarter or for a dollar.

*asked on January 25, 2011* -
## physics

A projectile of mass 1.450 kg is shot straight up with an initial speed of 20.0 m/s. (a) How high would it go if there were no air friction? (b) If the projectile rises to a maximum height of only 13.9 m, determine the magnitude of the average force due to

*asked on October 26, 2010* -
## physics

A 47.0 g golf ball is driven from the tee with an initial speed of 60.0 m/s and rises to a height of 24.4 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 7.0 m below its

*asked on October 26, 2010* -
## Chemistry/please check

Calculate the amount of heat in kilojoules reased when 50 of steam at 125 C are converted to 50 grams of ice at -125 C. AHsteam = m * Cp steam * At q1= 50g * 4.184 J/g C * (125-100)C= 5.23 x 10^J q2= m * AH 50g * 5230 J/g = 2.61 x 10^5 J q3= 50g *4.184 J/g

*asked on October 27, 2008* -
## math

A segment with endpoints C(-3, 3)and D(7, 3) is the diameter of a circle. a. What is the center of the circle? b. What is the length of the radius? c. What is the circumference of the circle? d. What is the equation of the circle?

*asked on March 21, 2018* -
## Physics

The temperature of 2.0 g of helium is increased at constant volume by ΔT. What mass of oxygen can have its temperature increased by the same amount at constant volume using the same amount of heat? I know for constant volume I should use the equation:

*asked on December 2, 2015* -
## physics - need help right now.

A boat travels at 3.8 m/s and heads straight across a river 240m wide at an angle of 145'. The river flows at 1.6 m/s. a. What is the boat's resultant speed with respect to the river bank? b. How long does ti take the boat to cross the river? c. How far

*asked on October 18, 2009* -
## chemistry

I need to know if I have th right molecular formula for Sorbito 39.56g C 7.75g H 52.7g O Empirical Formula is CH2O 30.026 amu how I how calculate the molecular mass and how I figure out the melecular formula? please help

*asked on October 28, 2008* -
## Japanese (extramural: linguistics/culture/history)

Hallo, my name is Joshua. I'm currently doing my matric in south africa, which is most unfortunate, because south africa doesn't have much to offer in terms of "foreign languages/culture." (Moving to england in a month. Perhaps it has more to offer^^) I am

*asked on November 3, 2007* -
## Algebra

Find the unknown digit to make the sentence true 2.48>2.4__ 1>2.463 5.723

*asked on October 1, 2018* -
## English

1.) Main Theme Of ''A Noiseless Flash'' Is That A. Chance Alone Determined Who Survived The Attack. B. Many Individuals Anticipated The Nuclear Holocaust. C. People Respond Methodically In Emergencies. D. All People Suffer Equally In War. This Is From The

*asked on March 17, 2018* -
## Social Studies

How did native American groups influence each other‘s cultures

*asked on February 2, 2018*