# AJ

Most popular questions and responses by AJ-
## physics

Determine the resulting temperature when 150g of ice at 0°C is mixed with 300g of water at 50°C

*asked on March 9, 2011* -
## Maths

17. Atlanta, Georgia, receives an average of 27 inches of precipitation per year, and there has been 9 inches so far this year. How many more inches, p, of precipitation can Atlanta get and to stay at or below the average? (1 point) p + 9 > 27; p > 18 9 +

*asked on February 4, 2018* -
## math

Why Was the Engineer Driving the Train Backwards?

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

To demonstrate standing waves, one end of a string is attached to a tuning fork with frequency 120 Hz. The other end of the string passes over a pulley and is connected to a suspended mass M, as shown. The value of M is such that the standing wave pattern

*asked on October 5, 2012* -
## arithmetic

If you have 3 cups of pineapple juice and, how many total cups of punch can you make? Table: Ginger Ale - 40% OJ 25% Pineapple juice 20% Sorbet 15

*asked on November 3, 2014* -
## math

Oregon is about 400 miles from west to east, and 300 miles from north to south. If a map of Oregon is 15 inches tall (from north to south), about how wide is the map? PLEASE HELP AND EXPLAIN IT Set up a proportion: 15/300 (the ratio of inches to miles,

*asked on January 16, 2007* -
## Physics

a) The recommended daily allowance (RDA) of the trace metal magnesium is 410 mg/day for males. Express this quantity in ?g/s. Express this quantity in b) For adults, the RDA of the amino acid lysine is 12 mg per kg of body weight. How many grams per day

*asked on June 9, 2017* -
## geo

what are the human activities in the innuitian mountains?

*asked on January 9, 2010* -
## Geography

which demographic group is correctly matched with its issue A.religious people - farm subsidies B.midwesterners - farm subsidies C.single parents - affirnmative action D.all are matched correctly

*asked on March 16, 2016* -
## Spelling

Wordly wise 3000 book 7 lesson 7c vocab answers?

*asked on December 17, 2013* -
## physics

A gazelle is running in a straight line (the x-axis). The graph in the figure (Figure 1) shows this animal's velocity as a function of time. During the first 12.0 , find the total distance moved

*asked on October 9, 2012* -
## Physics

If you are wearing a watch, what energy changes are taking place in it right now?

*asked on March 16, 2010* -
## Algebra

Rene used a $4 off coupon to buy bows which cost $2 each. Write an inequality rene could use to determine the number of bows she can buy if she plans to spen more that $8. Then graph the solution set

*asked on April 16, 2016* -
## Math

If sin(x) = 1/3 and sec(y) = 29/21 , where x and y lie between 0 and π/2, evaluate the expression using trigonometric identities. (Enter an exact answer.) cos(2y)

*asked on September 23, 2013* -
## government

Which institution developed outside the limits of the written Constitution of the United States?

*asked on February 10, 2012* -
## Chemistry

Given H2(g) + (1/2)O2(g) ---> H2O(l), dH = -286 kJ/mol, determine the standard enthalpy change for the reaction 2h2O(l) ---> 2H2(g) + O2(g) 2H2O(l) ---> 2H2(g) + O2(g) H2(g) + (1/2) O29g) ---> H2O (l) : dH = -286 kJ/mols 2H2O(l) ---> 2H2(g) + 2O2(g) :

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

In a car gas tank, 46.0 g of gasoline burns consuming 173 g of oxygen. The resultant products are carbon dioxide are carbon dixide and water. What is the total combined mass of the products? Would it be 173g - 46.0g = 127g

*asked on February 4, 2008* -
## Chemistry

When .560 g of Na(s) reacts with excess F2(g) to form NaF(s), 13.8 kJ of heat is evolved at standard-state conditions. What is the standard enthalpy of formation of NaF(s)? Start off by balancing the equation: 2Na(s) + F2(s) ---> 2NaF(s) Then make it for

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

To demonstrate standing waves, one end of a string is attached to a tuning fork with frequency 120 Hz. The other end of the string passes over a pulley and is connected to a suspended mass M, as shown. The value of M is such that the standing wave pattern

*asked on October 1, 2012* -
## Science

The water in a beaker has a mass of 18g. Electricity is passed through the water for two hours. Afterward the water has a mass of only 16g. What happened to the missing mass? The water heated up due to the electrical current going through it, and some of

*asked on April 22, 2007* -
## Math

my divisor is 5 I'm greater than 4 X 5 I'm less than 5 x 5 my remainder is 1 what dividend am I

*asked on February 20, 2017* -
## physics

Two point charges are placed along a horizontal axis with the following values and positions: +3 µC at x = 0 cm and - 12 µC at x = 35 cm. At what point (the coordinate) along the x axis is the electric field zero? Expess the answer (in cm) with one

*asked on September 11, 2012* -
## reading

Who is the antagonist in "The Face on the Milk Carton"? Also, what is the climax and what is the type of conflict. Please and thank you. Please check this site. http://en.wikipedia.org/wiki/The_Face_on_the_Milk_Carton Thank you for the site, but it still

*asked on August 3, 2007* -
## English

What type of clause or phrase is italicized in the sentence below? The play, a three-act farce, amused everyone.

*asked on September 23, 2013* -
## Chemistry

Why do we assume 100% ionization for acetic acid (a weak acid)? This is a titration problem. The titrant is sodium hydroxide, if that helps.

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

A running track consists of two straight sections with semi-circular ends. If the straight sections measure 100 metres and one compete lap on the inside of the track measures 1/2 k, what is the distance x between the two straights?

*asked on August 15, 2016* -
## calculs

A page of 150 square inches is to have margins of 1 inch on either side and 1 1/2 inches at the top and bottom, as in the diagram. Find the dimensions of the page that maximize the print area.

*asked on March 4, 2018* -
## science

Bess filled a syringe with water and left it by the sink in the sunshine. Ten minutes later she saw a puddle of water under the syring tip so she thought it was broken, but it wasnt. What do you think caused the little puddle of water to appear under the

*asked on February 4, 2008* -
## chemistry

How many moles of Ca(NO3)2 are needed to make 0.250 liters of a 0.200 M Calcium nitrate solution?

*asked on April 29, 2012* -
## Math

Express the product (1−1/2^2)(1−1/3^2)(1−1/4^2)···(1−1/21^2) as a fraction a/b, where a and b are relatively prime positive integers.

*asked on November 11, 2018* -
## Physics

A baseball coach shouts loudly at an umpire standing 3.6 meters away. If the sound power produced by the coach is 2.2×10−3 W, what is the intensity of the sound when it reaches the umpire? Answer in units of W/m2.

*asked on October 21, 2012* -
## Physics

A pipe that is open at both ends has a fundamental frequency of 330 Hz when the speed of sound in air is 333 m/s. What is the length of this pipe? Answer in units of cm. What is the second harmonic? What is the third harmonic? Answer in units of Hz. What

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

A wire with a circular cross section and a resistance R is lengthened to 3.77 times its original length by pulling it through a small hole. After being pulled through the hole, the total volume of the wire is unchanged. Find the resistance of the wire

*asked on October 31, 2012* -
## math

(a). Determine the DFS tree of K3,3. (b). Determine the BFS tree of K3,3.

*asked on March 14, 2011* -
## Physics

A variable-length air column is placed just below a vibrating wire that is fixed at the both ends. The length of air column open at one end is gradually increased from zero until the first position of resonance is observed at 20 cm. The wire is 115.4 cm

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

A variable-length air column is placed just below a vibrating wire that is fixed at the both ends. The length of air column open at one end is gradually increased from zero until the first position of resonance is observed at 20 cm. The wire is 115.4 cm

*asked on October 5, 2012* -
## analytic geometry

A parabola y=ax^2+bx+c has vertex (4,3). If (3,0) is on the parabola, find a.

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

2/3>3/ number that makes the statement true.. I am confused

*asked on October 13, 2015* -
## Microecon

Using the midpoints approach to the cross elasticity of demand-calculate the cross eleasticity the demand for golf at all 3 prices. Price Demand1 D2 D3 50 15 10 15 35 25 15 30 20 40 20 50 D1 -Income $50k per yr, movies $9 D2 -Income $50k -movies $11 D3

*asked on November 1, 2012* -
## physics

The drawing shows a uniform horizontal beam attached to a vertical wall by a frictionless hinge and supported from below at an angle θ = 38o by a brace that is attached to a pin. The beam has a weight of 346 N. Three additional forces keep the beam in

*asked on July 16, 2013* -
## Biology

What law of thermodynamics explains the fact that if you drop an egg, the shell will not spontaneously repair itself? The second law

*asked on February 24, 2007* -
## Maths

Write an equation of the line that passes through (-5,-1) and is parallel to the line y=-3x+6

*asked on August 10, 2018* -
## physics

How much heat is absorbed by an electric refrigerator in charging 2 Kg of water at 15°C to ice at 0°C?

*asked on March 9, 2011* -
## Math

30-second oral question The expression 9(2018^2)+20180+4040 is a square of what positive integer?

*asked on February 10, 2018* -
## physics

A 500g block is released from rest and slides down a frictionless track that begins 2m above the horizontal. At the bottom of the track, where the surface is horizontal, the block strikes and sticks to a light spring with a spring constant of 20.0N/m. Find

*asked on August 10, 2011* -
## geometry

suppose the diameter of a circle is 20in. long and a chord is 16in. long. What is the distance from the center of the circle to the chord Draw a radius from the center to the end of the chord. THe draw a radius from the center perpendicular to the chord.

*asked on July 8, 2007* -
## algebra

there is a cylinder perfume bottle the height is 12.4 cm the radius is 6.2 cm the formula is v= h * 3.14 * r squared

*asked on January 31, 2019* -
## algebraic modeling

A toy manufacturer determines that the daily cost,C, for producing x units of a dump truck can b approximated by the function c(x)=0.005x^2-x+109 I got that the manufacturer must produce 100 units per day... What is the minimum daily cost?

*asked on May 13, 2015* -
## Physics

An ac generator supplies an rms voltage of 5.00 {\rm V} to an RL circuit. At a frequency of 21.0{\rm kHz} the rms current in the circuit is 45.0 {\rm mA}; at a frequency of 26.0{\rm kHz} the rms current is 40.0 {\rm mA}. Find value of L an R ?

*asked on July 30, 2012* -
## Language

In O Captain! My Captain! I need help finding out what are they comparing to the civil war

*asked on February 28, 2019* -
## Maths

There are 150 mangoes in basket p and basket q. 1/4 of the mangoes in basket p were yellow and the rest were green. 3/5 of the mangoes in basket q were yellow and the rest green. The number of green mangoes in both baskets were equal. How many yellow

*asked on February 14, 2017* -
## Physics

A dart is thrown horizontally with an initial speed of 14 m/s toward point P, the bull's-eye on a dart board. It hits at point Q on the rim, vertically below P, 0.19 s later. (a) What is the distance PQ? (b) How far away from the dart board is the dart

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

A firefighter of mass 73 kg slides down a vertical pole with an acceleration of 5 m/s2. The acceleration of gravity is 10m/s2. What is the friction foce that acts on him? Answer in units of N

*asked on January 7, 2014* -
## Math 5th grade

how is the number of zeros in the quotient of 420 divided 7 = 60 related to the number of zeros in the dividend

*asked on November 30, 2010* -
## math

A rich uncle wants to make you a millionaire. How much money must he deposit in a trust fund paying 8% compounded quarterly at the time of your birth to yield $1,000,000 when you retire at age 59?

*asked on March 11, 2018* -
## calculus

Marine ecologists estimate the reproduction curve for swordfish in a fishing ground to be f(p) = −0.01p^2 + 8p, where p and f(p) are in hundreds. Find the population that gives the maximum sustainable yield, and the size of the yield.

*asked on March 4, 2018* -
## Physics

A length of organ pipe is closed at one end. If the speed of sound is 344 m/s, what length of pipe is needed to obtain a funda- mental frequency of 70 Hz? Answer in units of m.

*asked on October 5, 2012* -
## Chemistry

The freezing point depression of a 0.100 molality solution of NaCl(aq) solution is 0.34 deg C. Calculate the % dissociation of NaCl(aq) (Kf for water = 1.86 deg Cm^-1)

*asked on August 30, 2009* -
## chemistry

How do you balance this redox rxn? Al + HNO3 ----> Al(NO3)3 + NH4NO3 +H2O

*asked on April 22, 2009* -
## Math

True or False. 1. Every function is a relation. 2. When you switch the inputs and outputs of any function, the resulting relation is a function.

*asked on February 3, 2018* -
## MATH HELP!!

SID WROTE 541,309 ON HIS PAPER. USING NUMBERS AND WORDS EXPLAIN HOW THE NUMBER WOULD CHANGE IF HE SWITCHED THE DIGITS IN THE HUNDRED THOUSANDS AND TENS PLACES

*asked on August 20, 2014* -
## Physics

A skyrocket explodes 77 m above the ground. Three observers are spaced 106 m apart, with observer A directly under the point of the explosion. Find the ratio of the sound intensity heard by observer A to that heard by observer B. Find the ratio of the

*asked on October 21, 2012* -
## Physics

The time needed for a water wave to change from the equilibrium level to the crest is 0.4185 s. What fraction of a wavelength is this? What is the period of the wave? Answer in units of s. What is the frequency of the wave? Answer in units of Hz.

*asked on October 21, 2012* -
## Physics

A length of organ pipe is closed at one end. If the speed of sound is 344 m/s, what length of pipe is needed to obtain a funda- mental frequency of 70 Hz? Answer in units of m.

*asked on October 1, 2012* -
## math college

A bank account earns 10 percent interest compounded continously. What annual amount of money must parents deposit each year in order to save 110000 dollars in 9 years for a child's college expenses? Assume the annual amount is added continuously over the

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

A bank account earns 10 percent interest compounded continously. What annual amount of money must parents deposit each year in order to save 110000 dollars in 9 years for a child's college expenses? Assume the annual amount is added continuously over the

*asked on March 14, 2011* -
## Math

If 1 pound, 12 ounces of fish cost $2.24, what is the cost of the fish per pound?

*asked on November 26, 2017* -
## Math Slope

Jose the plumber charges $65 per hour to fix your plumbing. He uses the equation C=65H+100 to determine the charge of his services, C, after working h hours. What is the Y intercept? What does it represent in the context of the problem.

*asked on December 30, 2016* -
## Science

Uranium-238 is less stable than oxygen-16. What accounts for this difference? (A) Uranium is a solid, while oxygen is a gas. (B) Unlike oxygen-16, uranium-238 has a nucleus in which repulsive electric forces surpass the strong nuclear forces. (C) Oxygen-16

*asked on November 20, 2013* -
## calculus SIMPSON RULE

Use Simpson's Rule and all the data in the following table to estimate the value of the integral . x -16 -15 -14 -13 -12 -11 -10 y -8 9 4 9 -5 -9 3

*asked on March 14, 2011* -
## college math

You won the lottery. They will pay you 1 million dollars a year for 20 years. Assuming 10 percent interest compounded continuously, approximate the present value of your winnings by assuming the money is paid to you continuously over the period of each of

*asked on March 14, 2011* -
## calculus

Find the value of $800 deposited in a bank at 10% interest for 8 years compounded in the following ways. (Round your answers to the nearest cent.) (a) annually_________$ (b) quarterly_________$ (c) continuously________$

*asked on March 7, 2018* -
## Social Sciences-Social Anthropology

Hi Please help me I am confused Am I a homo sapiens? or a homo sapiens sapiens? thank you so much.

*asked on November 30, 2017* -
## Chemistry

Write the balanced chemical reaction (showing appropriate symbols and states) for the chemical reaction with enthalpy change equal to and defined by the quantity dHformation [NH3(g)] N2(g) + 3H2(g) --> 2NH3(g) Is that all the question is asking for?

*asked on March 26, 2017* -
## 12 grade economics

describe four advantages of using price as an allocating mechanism?

*asked on July 14, 2009* -
## math -hw help

Determine whether the following regular tetrahedrons have an edge length that is a whole number, a rational number or irrational number. The surface are of a tetrahedron is given by the equation: SA = √ 3s^2 Surface are of regular tetrahedron A = 1.5

*asked on February 5, 2015* -
## Physics

A certain lightbulb has a tungsten filament with a resistance of 28 Ω when cold and 144 Ω when hot. If the equation R = R0 [1 + α ∆T ] can be used over the large temperature range involved here, find the temperature of the fila- ment when it is hot.

*asked on October 31, 2012* -
## math

(a). For any connected graph G, all internal nodes of the BFS tree on G have the same number of children. (b). For any connected graph G, the DFS tree on G and the BFS tree on G have the same number of edges.

*asked on March 14, 2011* -
## Algebra

Jack and Jill regularly run around an 800-meter track, but Jack runs 2 m/s faster. If they start from the same point on this track, and run in the same direction, Jack will eventually pass Jill in 6 minutes and 40 seconds. What is Jill's speed?

*asked on February 8, 2018* -
## Math

You are making cookies. One recipe calls for 4 cups of chocolate morsels for 3 batches of cookies.. A second recipe calls for 5 cups of chocolate morsels for 4 batches of cookies. Which cookies will contain more chocolate morsels?

*asked on January 25, 2018* -
## Chemistry

The enthalpy of formation for a substance corresponds to the enthalpy change for a reaction. Write the specific chemical reaction defining the enthalpy of formation of butane: Just checking to make sure this is correct: 4C + 5H2 ---> C4H10

*asked on March 26, 2017* -
## Algebra

The time, t, required to drive a certain distance varies inversely with the speed, r. If it takes 12 hours to drive the distance at 60 miles per hour, how long will it take to drive the same distance at 85 miles per hour? A. About 7.08 hours B. About 5.00

*asked on June 2, 2015* -
## Grammar

Before the items that are complete sentences, write S. Before those that contain fragments, write F. Before a run on sentence, write RS. 1. We often walk through the woods, picking berries and listening to the birds. Is this a run on sentence?

*asked on July 2, 2014* -
## algebra

Joseph always throws change into a can and takes it out every two weeks. This time it is all nickels and dimes. There are six times as many dimes as nickels, and the value of the dimes is $4.95 more than the value of the nickels. How many nickels and dimes

*asked on April 22, 2012* -
## algebra

Emily wants to buy turquoise stones on her trip to New MExico to give to at least 4 of her friends. The gift shop sells stones for either $4 or $6 per stone. Emily has no more than $30. What are the system of inequalities so I could be able to graph them?

*asked on January 27, 2008* -
## Science

A sample of water decomposes to make 4g of hydrogen gas and 32g of oxygen gas. What mass of water decomposed? How do you know? Hint: The water decomposes into ONLY hydrogen and oxygen, and the total mass does not change in the process. It's called the Law

*asked on April 22, 2007* -
## Math

A soccer field has a perimeter of 26 yards.if the width is 8 yards,how long is the length?

*asked on January 24, 2017* -
## Science

Describe the apparent motion of the stars and planets that is caused by the revolution and rotation of the earth.

*asked on March 11, 2013* -
## Physics

The lowest A on a piano has a frequency of 27.5 Hz. Assume: The tension in the A piano wire (of length 0.51 m) is 305 N, and one-half wavelength occupies the wire. What is the mass of m the wire? Answer in units of kg.

*asked on October 5, 2012* -
## Analytic Goemetry

Find the equation of the parabola with axis parallel to the x-axis and passing through (3/2,1),(5,0) and (-1,2).

*asked on March 23, 2011* -
## reading

Who is the antagonist in the book, Death Be Not Proud? Also, what type of conflict is it and what is the climax of the story? Is the climax when Johnny starts having a stiff neck and they discover he has a tumor in his brain?

*asked on August 30, 2007* -
## Chemistry

Calculate the pH of 175.0 mL of H2O following the addition of 0.57 mL of 1.39 M NaOH

*asked on October 3, 2017* -
## Math

The local health club is advertising a special for new members: no initiation fee to join and lnly $34.50 per month for the first year. If Andy joins the health club for one year, how much will he spend on membership?

*asked on September 14, 2015* -
## trig

the pendulum of a grandfather clock is 1.3m long. Determine the length of the arc through which the pendulum moves if it moves through an angle of 15

*asked on November 8, 2012* -
## Physics

The length of a string is 344 cm. The string is held fixed at each end. The string vibrates in two sections; i.e., the string has two antin- odes, and the string vibrates at 130 Hz. Find the wavelength. Answer in units of m. What is the fundamental

*asked on October 5, 2012* -
## Physics

The length of a string is 344 cm. The string is held fixed at each end. The string vibrates in two sections; i.e., the string has two antin- odes, and the string vibrates at 130 Hz. Find the wavelength answer in m What is the fundamental frequency? Answer

*asked on October 1, 2012* -
## Analytic Goemetry

Find the equation of the parabola whose axis is horizontal, vertex on the y-axis and which passes through (2,4) and (8,-2).

*asked on March 23, 2011* -
## college math

A business associate who owes you 3600 dollars offers to pay you 3360 now, or else pay you three yearly installments of 1200 each, with the first installment paid now. Assume that the interest rate will be 7 percent (compounded continuously). Find the

*asked on March 14, 2011* -
## Physical science

A player uses a hockey stick to increase the speed of a 0.200 kg hockey puck by 6 m/s in 2 seconds. How much did the hockey puck accelerate? How much force was exerted on the puck? How much force did the puck exert on the hockey stick?

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

A projectile was fired at 35 degrees above the horizontal. At the highest point in its trajectory its speed was 200 m/s. If air resistance is ignored, the initial velocity had a horizontal component of 0. How is this possible? Someone explain it for me

*asked on November 30, 2010*