# 1.3 /73.814 In significant digit notation, divid, and the answer to two significant digits. I will be happy to critique your work

71,152 questions, page 494-
## Physics

A projectile is launched with 200kg m/s of momentum and 1000 J of kinetic energy. What is the mass of the projectile. The answer is said to be 20 kg but I can't get it. I tried this but it didn't work: p=mv=200 m=200/v I plugged that into this equation:

*asked by Marisol on October 23, 2007* -
## physic

A 57 kg boy and a 42 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 3.4 m/s2, determine the magnitude of the acceleration of the boy toward the girl. Answer in

*asked by Wendia on September 22, 2010* -
## physics

a ray of light strikes a rough surface such that the angle of incidence is 40.0. what is the angle of reflection 1. 0 degrees 2. 20.0 degrees 3. 40.0 degrees 4. the angle of reflection cannot be determined. I am confused between 3 and 4 but I think the

*asked by paul on January 9, 2018* -
## science, physics

A 4 μC point charge is on the x-axis at 1.1 m, and a 3 μC point charge is on the x-axis at 2.7m. Find the magnitude of the net electric field at the point on the y-axis where y = 3.7 m . The value of the Coulomb constant is 8.98755 × 109 N · m2/C2.

*asked by Jami on July 22, 2014* -
## Algebra

A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.

*asked by Casey on April 23, 2013* -
## Calculus

A ladder 8 meters long is leaning against a wall. If the top of the ladder is slipping down at the rate of 8 meters per second, how fast is the bottom moving away from the wall when it is 7 meters from the wall? Please give your answer in , enter it

*asked by TraiShaun on October 24, 2011* -
## Math

PLEASE HELP: A bathtub has a capacity of 42 gallons and is completely full of water. Ten gallons of water are drained out. Enter the percentage of gallons of water left in the bathtub. Round your answer to the nearest hundredth.

*asked by jwalkerjess on September 17, 2015* -
## Algebra

A ranger spots a forest fire while on a 45-meter observation tower. The angle of depression from the tower to the fire is 12 degrees. To the nearest meter, how far is the fire from the base of the tower? IS THE ANSWER 212 meters

*asked by Anna on February 18, 2012* -
## Algebra

A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.

*asked by Casey on April 23, 2013* -
## Finance

Saturated Meat Corporation preferred stock is currently selling for $22 per share. The preferred dividend is $2.50 per share. If Jennifer requires a return of 10% on the preferred stock, should she invest in this stock? You must empirically support your

*asked by Teresa on January 30, 2011* -
## College Algebra

The length of a rectangle is 3 times the width . If the perimeter is to be at least 48 meters, what are the possible values for the width? (If the perimeter is at least 48 meters, then it is greater than or equal to 48 meters.) Enter the expression for the

*asked by Nancy on April 18, 2011* -
## Trig

Use the fundamental identities to simplify the expression: cot beta sec beta I used 1+tan^2u=secu since cot is the inverse of tan. I flipped the tangent, then so it was 1+ (1/tan). But the book's answer is the cosecant of beta. Where did this come from??

*asked by Tara on January 4, 2010* -
## Health

Body fat is defined as the proportion of fat that is in your body compared to your bone and muscle. True or False My answer is true because to me its the component that refers to the ratio of fat to lean body mass.

*asked by Faye on August 18, 2014* -
## maths

The enrollment of Kennedy High School dropped from 1200 to 1000 over a three-year period. What the percent of decrease during this time? A. 20 B 16 2/3 C. 25 D. 200 E. 2 My answer is 1200-1000=200 200/1200= 1/6 ( some wrong )

*asked by Tomas on August 15, 2013* -
## Physics

A 0.48 kg soccer ball approaches a player horizontally with a velocity of 18 m/s to the north. The player strikes the ball and causes it to move in the opposite direction with a velocity of 24 m/s. What impulse was delivered to the ball by the player?

*asked by Michael N. on January 24, 2011* -
## physics

A 58 kg boy and a 38 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 3.1 m/s 2 , determine the magnitude of the acceleration of the boy toward the girl. Answer in

*asked by Shareka on September 13, 2013* -
## Chemistry - Thermodynamics

Which one of the following reactions would you expect to have highest ΔS°? Answer A. C2H2(g) + 5/2O2(g) → 2CO2(g) + H2O(g) B. C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(g) C. CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) D. C2H6(g) + 7/2O2(g) → 2CO2(g) + 3H2O(g)

*asked by Anonymous on April 15, 2012* -
## Precalc

Find the values of x between (or equal to) 0 and 360 degrees to satisfy each equation. arcsin1/2=x I got 30 degrees as one angle, but how do I find the second one? arccot1=x Is the answer 45 degrees? Also, Find each value: arccos(-1/2) and sin(2 sin^-1

*asked by George on February 13, 2008* -
## Physics

A 57 kg boy and a 45 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 1.5 m/s2, determine the magnitude of the acceleration of the boy toward the girl. Answer in

*asked by Jessica on October 14, 2012* -
## Physics

Can you help me through this one? I don't want just the answer: A ball is thrown straight up and rises to a maximum height of 24 m above the ground. At what height is the speed of the ball equal to half of its initial value? Assume that the ball starts at

*asked by Logan on September 15, 2011* -
## Chemistry(Please check)

Which of the following four processes are accompanied by an increase in entropy? 1. I2 (s) -> I2 (g) 2. 2 I (g) -> I2 (g) 3. 2 NH3 (g) -> N2 (g) + 3 H2 (g) 4. Pb2+ (aq) + 2 OH – (aq) -> Pb(OH)2 (s) Answers: a. 1 & 2 b. 1 & 3 c. 3 & 4 d. 2 & 4 e. only 3 I

*asked by Hannah on April 23, 2012* -
## Spanish help

In spanish why are the present-tense verbs for yo complete considered to be stem-changing verbs? 1.Because in some of them, when the e is stressed, it is changed to ie 2.Because in some of them, when the o is stressed, it is changed to we 3. Because in

*asked by Alexander Dennis on September 14, 2014* -
## Biostats

I am having problems in this course with following the professor. Can anyone help me with this problem Thanks need to calculate 99% CI for true mean with the following data: n=100, mean is 126 with sample variance of 402. I have to know the answer,

*asked by Grace on June 7, 2007* -
## Chemistry

O.k. I am confused. So here is what I did. Mass of empty flask plus stopper: 37.34g mass of stoppered flask plus water: 63.67g Mass of stoppered flask plus liquid: 52.01g Mass of water: 63.67 - 37.34= 26.33 Volume of Flask(density of H20 at 25*C, 0.9970

*asked by Sara on August 22, 2007* -
## Pork in World Religions

Which religions ban the eating of pork? What is the reasoning behind each religion's decision not to eat pork? How has this effected the worldwide distribution of pork-related products?

*asked by Chris on May 30, 2007* -
## Microeconomics

We consider an exchange economy and i have to show in an edgeworth box that an allocation can be individually rational (meaning that no consumer prefers the initial bundle to the bundle obtained in the allocation) and pareto optimal without being a walras

*asked by Ansi on April 12, 2007* -
## statistics

if the null hypothesis is that the mean is 3218, the alternative hypothesis is that the mean > 3228, and the sample mean is x= 3342, the sample standard deviation is s=287, the sample size is n= 42, and α= 0.01 a. calculate the z test statistic. b. what

*asked by emily on April 29, 2012* -
## science

a hunter aims his gun and fires a bullet directly at a monkey in a tree. at the instant the bullet leaves the barrel of the gun,the monkey drops. will the bullet hit the monkey .substantiate your answer with proper reasoning.

*asked by jo1 on July 1, 2012* -
## Physics

A computer hard drive rotates at 5400 revolutions per minute. Starting from rest, what torque will get the hard drive up to that speed in just 150 revolutions? The moment of inertia of the hard drive is 1.3×10^-2 kg·m^2. I know the answer is 2.2 N.m, but

*asked by Devon on December 5, 2014* -
## physics

The density of liquid carbon dioxide is about 0.8 g/cm^3. What volume fraction inside the fire extinguisher (when full) is occupied by CO2? The density of CO2 gas is negligible compared to the density of liquid CO2. My answer was 75%. Please verify.

*asked by Alice on December 23, 2013* -
## physics

A 66.5 kg ice skater moving to the right with a velocity of 2.72 m/s throws a 0.104 kg snow- ball to the right with a velocity of 40.3 m/s relative to the ground. What is the velocity of the ice skater after throwing the snowball? Disregard the friction

*asked by Jill on December 5, 2012* -
## Physics

An 82.9 N box of clothes is pulled 28.2 m up a 20.7◦ ramp by a force of 117 N that points along the ramp. The acceleration of gravity is 9.81 m/s^2. If the coefficient of kinetic friction between the box and ramp is 0.29, calculate the change in the

*asked by Josh on December 10, 2014* -
## math

points) You arrive home to find that your 55 foot by 20 foot basement has 6 inches of water in it. a) If 1 cubic foot of water is about 7.48 gallons, how much water will you be pumping out of your basement? Express your answer rounded to the nearest tenth

*asked by joie on September 23, 2017* -
## math

San falls from a conveyor belt at the rate of 10 m^3/min onto the top of a conical pile. The height of the pile is always three-eighths of the base diameter. How fast are (a) height and (b) radius changing when the pile is 4 m height? Answer in cm/min.

*asked by ibranian on August 12, 2012* -
## Physics (URGENT)

Three wire-wound resistors have the following values: 30 ohms, 80 ohms, and 100 ohms. Each resistor has a voltage rating of 100V. If these three resistors are connected in series, can they be connected to a 240V circuit without damage to the resistors?

*asked by Anonymous on September 24, 2013* -
## physics

The density of a sample of air is 1.235 kg/m3, and the bulk modulus is 1.42 · 105 N/m2. a) Find the speed of sound in the air sample. b) Find the temperature of the air sample. Give answer in °C. Do not enter unit. Yanlýþ. Denemeler

*asked by Urgent on April 1, 2011* -
## please help

The Everton college store paid $1859 for an order of 49 calculators. The store paid $11 each for scietific calculators. The others, all graphing calculators, cost the store $55 eaach. How many of each type of calculator ws ordered? Please answer in detail

*asked by Shelly on July 26, 2011* -
## Physics

The co-efficient for static friction for a 5 kg box on a floor is .72. How much force if required to start the box sliding? I worked it as follows: Force of friction=Force normal * co-effic. of friction which is .72*5*9.8=35.28 but answer in back of my

*asked by CC on March 31, 2009* -
## Math

Please explain to me how to solve: A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.

*asked by Jane on January 25, 2012* -
## Math

A square, where s is an odd integer, is divided into unit squares. All the unit squares along the edges and the 2 diagonals of a square are discarded. Find a fully simplified expression, in terms of s, for the number of unit squares remaining answer.

*asked by Jamie on July 5, 2016* -
## Geometry

Jonathan is 3 ft from a lamppost that is 12 ft high. The lamppost and it's shadow form the legs of a right triangle. Jonathan is 6 ft tall and Is standing parallel to the lamppost. How long is Jonathan's shadow? I don't get how the answer is square root

*asked by Anonymous on January 11, 2012* -
## Physics

An electron is acted upon by a force of 3.50×10−15 N due to an electric field. Find the acceleration this force produces in each case: The electron's speed is 6.00 km/s . =3.84*10^15 The electron's speed is 2.60×108 m/s and the force is parallel to the

*asked by Bob on October 30, 2017* -
## History

I need HELP on my history homework about Christianity in Rome. The section is "The Missionary Work of Paul": 1. Why did Paul's early life contradict what he ended up doing later in life? I think the answer to 1 might be: In Paul's early life, he explicitly

*asked by Riona on May 14, 2018* -
## Probability.. HELP!

Three men were walking down a street talking when they met a fourth man. If the fourth man knew that two of the men always lied and the third always told the truth and he asked the three men a question, what is the probability that he got a truthful answer

*asked by KG on November 12, 2014* -
## Chemistry

What mass of KIO3 is needed to convert the copper in 0.200g of CuSO4.H2O to Cu(IO3)2? my answer is: 0.828g Cu(IO3)2 x (2*214.003 MolarM KIO3/ 413.36 MolarM Cu(IO3) = 0.857g KIO3 could you please check if i got it right

*asked by xavier on July 17, 2013* -
## chemistryyy

Answer the following two questions about the equivalence point for the titration of 27.8 mL of 0.235 M hypobromous acid (pKa = 8.64) with 0.214 M KOH. 1)Predict if the solution will be acidic, basic or neutral at the equivalence point. 2)Calculate the pH

*asked by Rachel on September 21, 2011* -
## first steps in using a personal computer

alphonus and larry are discussing start menu commands.alphonus will go to the control panel to see a display of all local and remore drives.larry will go to computer to make changes to some computer settings.who is correct a.neither b.both c.alphonus

*asked by susue on November 13, 2013* -
## physics

A loaded elevator with very worn cables has a total mass of 2200kg, and the cables can withstand a maximum tension 28 000N a) what would be the maximum upward acceleration for the elevator if the cables are not to break? b) what would be the answer to part

*asked by colleen on August 22, 2009* -
## chemistry

Which of the following properties is a chemical property of phosphorus? Answer a) it burns in air b) it is a white waxy solid c) it melts to form a viscous liquid at 44.1 oC d) Both a and c are both examples of chemical properties. e) a, b, and c are

*asked by Jack on September 6, 2010* -
## maths

A water tank has the shape of a rectangular prism of base 50 cm2. This tank is being filled at the rate of 12 liters per minutes. Find the rate at which the height of the water in the water tank increases; express your answer in millimeters per second.

*asked by LARA on February 3, 2014* -
## physics

An 85.7 N box of clothes is pulled 26.2 m up a 31.7 ◦ ramp by a force of 112 N that points along the ramp. The acceleration of gravity is 9.81 m/s 2 . If the coeﬃcient of kinetic friction between the box and ramp is 0.24, calculate the change in the

*asked by Anonymous on November 29, 2012* -
## chemistryyy

Answer the following two questions about the equivalence point for the titration of 27.8 mL of 0.235 M hypobromous acid (pKa = 8.64) with 0.214 M KOH. 1)Predict if the solution will be acidic, basic or neutral at the equivalence point. 2)Calculate the pH

*asked by Rachel on September 21, 2011* -
## Math

A square, where s is an odd integer, is divided into unit squares. All the unit squares along the edges and the 2 diagonals of a square are discarded. Find a fully simplified expression, in terms of s, for the number of unit squares remaining answer.

*asked by Jamie on August 15, 2016* -
## Math

Please explain to me how to solve: A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.

*asked by Jane on January 26, 2012* -
## Math

From a sample set of 10 colored balls--5 green, 3 red and 2 yellow-- 5 are chosen at random WITH replacement. What is the probability that the result will be: green, red, yellow, red, green? Write your answer as a four place decimal number. p(G,R,Y,R,G)

*asked by Jazz on March 13, 2016* -
## chemistry

A sample of Nitrogen(N2)& Helium has a volume of 250mL @ 30degrees celsius & a total pressure of 745 mmHg a)If the pressure is 32mmHg what is the partial pressure of the Nitrogen? b) What is the volume of the Nitrogen at STP? Did not understand previous

*asked by Connie on March 24, 2011* -
## Math differentiation

1. y = x^x 2. y = (sin^2xtan^4x)/(x^2+1)^2 3. y = x^(1/x) 4. y = 2^(-x^3) Okay, so I'm pretty sure 1 is done easily: ln y = ln (x^x) ln y = x ln x d/dx ln y = d/dx x ln x y'(1/y) = x(1/x) + ln x(1) = 1 + ln x y'(1/y) = ln x + 1 y' y(1/y) = (ln x + 1)y y' =

*asked by Marissa on August 27, 2008* -
## english

I have to make this sentence nonracist and nonagist can you help? 1. She is a very capable black woman. here is my answer: She is a very capable African American. 2. It's hard to believe that a woman her ago could accomplish so much. I think it is correct

*asked by jessica on August 23, 2006* -
## COM 220

in what ways are full sentence outlines more beneficial than topic outlines? if someone asked wouldnt it be simplir just to write your paper then to create a full sentence outline? how would you answer?Explain your response what steps will you take your

*asked by Stacie on May 7, 2009* -
## chemistry

A definite amount of nh4cl was boiled with 100ml of 0.8N naoh for complete reaction. After the reaction, the reactant mixture containing excess of naoh was neutralized with 12.5ml of 0.75N nh2s04. Calculate the amount of nh4cl takedn The answer 3.78g who

*asked by Fai on February 10, 2013* -
## Ed. Tech

Which definition below best describes the definition of theme within poetry? A. It is the pattern of rhyming lines within a poem. B. It is the underlying message that a poem conveys. C. It is the pattern of stressed and unstressed syllables in a poem. D.

*asked by Gwen on September 10, 2014* -
## math

A mobile shop sold one phone set everyday in the month of February and March of 2013. If each set costs $102, which of the following is closest to the money the shop earned in these two months? pick an answer that is right :/ (counfuesd) $5,000 $6,000

*asked by samantha on October 16, 2013* -
## chemistry

Concentrated hydrochloric acid has specific gravity 1.18 and 36% hcl weight. What volume of concentrated hcl must be diluted to give 50gm of 10 percent My calculation 50gm x 10% = 5gm 5gm x 36.46 =182.3/ 0.36 = 506 / 1.18 = 429 ml I am not sure answer. Who

*asked by Fai on August 11, 2012* -
## Physics

A pilot flies an airplane in a vertical circular loop at a constant speed õ = 160 m/s. If the pilot’s apparent weight at the top of the loop is one-third of his true weight when he is on the ground, find the radius R of the plane’s circular path.

*asked by Drew on March 19, 2010* -
## college algebra

An advertising agency conducted a survey and found that the number of units sold, N, is related to the amount a spent on advertising (in dollars) by the following formula: N = 2,500 + 400 ln a (a ¡Ý 1) How many units are sold after spending $1,000?

*asked by Tichie on March 8, 2013* -
## Chemistry

First two hw of 50 that I am trying to get a handle on. Any help would be appreciated. 3.What gaseous substance is driven off of succrose when it is heated? is the answer CO2? 7.What gaseous substance is driven off of succrose when it is reacted with acid?

*asked by Bobby on August 8, 2010* -
## physics

A 23.1 kg block is dragged over a rough, horizontal surface by a constant force of 95.0 N acting at an angle of angle 29.3 ° above the horizontal. The block is displaced 5.50 m, and the coefficient of kinetic friction is 0.341. Find the magnitude of the

*asked by Elisabeth on September 15, 2011* -
## Physics

A markman fires a .22 caliber rifle horizontally at a target the bullet has a muzzle velocity with magnitude 750 ft/s. How much does the bullet drop in flight if the target is (a) 50.0 yd away and (b) 150.0 yd away? for this question i was given the

*asked by Sarah on June 7, 2009* -
## pre lab Q on chromatography

suppose that there are two components, A and B, in a mixture. The chemical affinity of A for the stationary pahse is less than that of B and the chemical affinity of A for the mobile phase is greater than that of B. If the mixture is subjected to paper

*asked by Natash on April 19, 2009* -
## supply chain

Supply Chain Risk: Research information on the Internet to assess the risks of a global supply chain. How have companies in the Microsoft supply chain been aﬀected by disruptions to the supply chain due to events like strikes and natural disasters?

*asked by v on November 19, 2014* -
## The Curriculum

Which of the following is not a good technique for stimulating children to value the arts? A. Talking with children about beauty in nature and the arts B. Creating and sharing your own artistic projects C. Integrating art and music into the curriculum D.

*asked by Daniela on August 23, 2014* -
## Physics

A cube of mass m1 = 6.8 kg is sitting on top of another cube of the same size and mass m2 = 0.7 kg while they are both in free-fall. Ignoring any air resistance, what is the magnitude of the normal force with which the bottom cube is acting on the top

*asked by anon on February 23, 2015* -
## Chemistry

Nitric acid can be produced by the reaction of gaseous nitrogen dioxide with water. 3 NO2(g) + H2O(ℓ) −→ 2 HNO3(ℓ) + NO(g) If 916 L of NO2 gas react with water, what volume of NO gas will be produced? Assume the gases are measured under the same

*asked by Anonymous on May 1, 2015* -
## Calculus

The rate of growth dP/ dt of a population of bacteria is proportional to the square root of t with a constant coefficient of 9, where P is the population size and t is the time in days (0¡Üt¡Ü10). The initial size of the population is 700. Approximate

*asked by Beth on November 9, 2015* -
## Literature (Ms. Sue)(or Writeacher)

The short story is called Chicoria by Rudolfo A. Anaya. How does the server respond when Chicoria says he expects to be fed well at the rancher's table? My answer: The servant becomes rather surprised by Chicoria's statement, causing him to explain to

*asked by Anonymous on May 14, 2013* -
## Physics

A car, of total mass 1200 kg, is travelling at 90 km/h and strikes a tree. The front end of the car compresses and the driver comes to rest after travelling 0.80 m. (i)What was the average acceleration of the driver during the collision? Express the answer

*asked by Oisin on July 20, 2010* -
## Physics

A car, of total mass 1200 kg, is travelling at 90 km/h and strikes a tree. The front end of the car compresses and the driver comes to rest after travelling 0.80 m. (i)What was the average acceleration of the driver during the collision? Express the answer

*asked by Oisin on July 20, 2010* -
## Art

The picture is of colorful clogs. Through this collection, you can gain a better understanding of all of the following except. A. The history and traditions of a group of people. B. The diversity of a group of people during a specific time period. C. The

*asked by Gwen on September 12, 2014* -
## L.A

In the diary of anne frank act 2 why wont Mr. Frank answer the telephone A. he doesn't speak dutch very well. B. he is afraid that the caller will give him bad news. C. he prefers to speak to people face to face D. he doesn't want anyone to know that the

*asked by anonymous on March 24, 2015* -
## Algebra

An advertising agency conducted a survey and found that the number of units sold, N, is related to the amount a spent on advertising (in dollars) by the following formula: N = 1,500 + 200 ln a (a ¡Ý 1)How many units are sold after spending $1,000? (Round

*asked by Jim on May 14, 2013* -
## math Steve for your solution

0.224g sample that contained only bacl2 and kbr required 19.7ml of 0.1M ango3 to reach the end point. Calculate the percentage of each compound present in the sample. The right answer bacl2 32.4% KBR 67.7% You need to use 3 solution of drug H containing

*asked by Fai on December 28, 2013* -
## Algebra

An advertising agency conducted a survey and found that the number of units sold, N, is related to the amount a spent on advertising (in dollars) by the following formula: N = 6,500 + 400 ln a (a ≥ 1) How many units are sold after spending $1,000? (Round

*asked by Larry on May 9, 2013* -
## Physical Science

I need help answering these two questions, can someone please help? 1.How does energy transfer by waves differ from energy transer my moving objects? 2.Define amplitude and frequency as they relate to a wave. [I know amplitude is the height of a wave and

*asked by mysterychicken on May 4, 2009* -
## physics

A ball is projected horizontally from the edge of a table that is 1.2 m high, and it strikes the floor at a point 1.11 m from the base of the table.The acceleration of gravity is 9.8 m/s2 .How high is the ball above the floor when its velocity vector makes

*asked by monica on September 20, 2011* -
## MATH

A tree is "x"meters high. The angle of elevation of its top from a point P on the ground is 23degrees. Form another point Q, 10meters from P and in line with P and the foot of the tree, the angle of elevation is 32degrees. Find "x". (Please don't give me

*asked by Nazharia on March 5, 2008* -
## trig

The number of revolutions made by a figure skater for each type of axel jump is given. Determine the measure of the angle generated as the skater performs each jump. Give the answer in both degrees and radians. a. single axel: 1.5 b. double axel: 2.5 c.

*asked by meg on September 6, 2008* -
## chemistry

Nitric acid can be produced by the reaction of gaseous nitrogen dioxide with water. 3 NO2(g) + H2O(ℓ) −→ 2 HNO3(ℓ) + NO(g) If 900 L of NO2 gas react with water, what volume of NO gas will be produced? Assume the gases are measured under the same

*asked by Anonymous on December 3, 2016* -
## Math

There's a question I've been having difficulty solving, and I would really appreciate if you can show he steps to how I can achieve the answer. QUESTION: The numbers 1, 4, 10, 20, and 35 are called tetrahedral numbers because they are related to a four

*asked by Sarah on July 27, 2015* -
## Chemistry

In the process of separating pb2+ ions from cu+2 ions as sparingly soluble iodates, what is Pb2+ concentration when Cu+2 begins to precipitate as sodium iodate is added to a solution that is initially 0.0010M Pb(NO3)2 (aq) and 0.0010M Cu(NO3)2 (aq)? I know

*asked by Anonymous on January 29, 2015* -
## Chemistry

What is the pH of a solution prepared by mixing 50.0 mL of 0.010 mol/L HCl(aq) and 50.0 mL of 0.010 mol/L Ca(OH)2(aq)? Assume the temperature is 25 degrees Celsius. Additional information given: Kw = 1.0×10^−14 at 25 degrees Celsius. The possible

*asked by allie on May 4, 2016* -
## The Curriculum

Which of the following is not a good technique for stimulating children to value the arts? A. Talking with children about beauty in nature and the arts B. Creating and sharing your own artistic projects C. Integrating art and music into the curriculum D.

*asked by Daniela on September 12, 2014* -
## college math

The atmospheric pressure P in pounds per square inch (psi) is given by the formula below, where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 13.25 psi, what is its altitude? (Recall that 1 mi = 5,280 ft. Round your

*asked by joyce on July 10, 2011* -
## History

All of the following are examples of how a local jurisdiction may have tried to inhibit African-Americans from voting prior to the Voting Rights Act, except: Poll Taxes Literacy Tests Intimidation and Violence Skin Color Comparison Tests Is the answer poll

*asked by Jim on May 8, 2009* -
## 7th grade math

Jared wants to save $100 to buy a tennis racket. He saces $8 each week, and his mother gives him a extra $0.25 for each dollar he saves. Determine the number of week it will take Jared to save $100. I am pretty sure the answer is 12 weeks and he would have

*asked by Peyton on August 25, 2009* -
## statistics

A multiple choice exam has 20 questions; there are four choices for each question. A student guesses the answer to every question. Find the chance that he guesses correctly between four and seven times. Find the minimum score the instructor can set so that

*asked by m on February 10, 2014* -
## chemistry

Which of the following is true of the solubility product constant? A. It is the product of the initial concentrations of the ions in a solution. B. It is an equilibrium constant. C. It is an equilibrium position. D. Its value changes in the presence of a

*asked by jessie on September 11, 2016* -
## statistics

What is the alternative hypothesis for a null hypothesis stating that the average time a person keeps a cell phone is at most three years. Answer: Ha: mu > 3 State the null and alternative hypotheses for the following: You are investigating a complaint

*asked by Anonymous on January 26, 2012* -
## math

RATES OF CHANGE QUESTION A spherical balloon is being blown up so that its volume is increasing by 0.6 m^3 s^-1. Find the rate at which the radius is increasing when the radius is 0.1 m. So what I did was that I determined dV/dt =0.6 and dV/dr = 4/3 r^3

*asked by tina on June 13, 2010* -
## Microeconomics

Medical doctors earn higher incomes than people who have a Ph.D. in economics. This is partly because A. Medical doctors are more likely to face malpractice lawsuits. B. The costs of receiving necessary medical education are higher. C. A relatively small

*asked by Anthony on May 27, 2015* -
## algebra

The formula b=27a, is used in New England to estimate the minimum furnace output, b, in BTUs, for a modern house with a square feet of flooring. What is the minimum furnace output for BTUs? What is the answer to A? I have searched and listened to all kinds

*asked by Demi on January 8, 2011*

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