
Physics
A locomotive pulls 12 identical freight cars. The force between the locomotive and the first car is 150.0 kN, and the acceleration of the train is 2 m/s2. There is no friction to consider. Find the force between the eleventh and twelfth cars. (Express your
asked by Tim on February 8, 2017 
math
The length of a rectangular room is two feet less than three times its width. The area of the rectangle is 176 square feet. a) Write an algebraic equation to model this problem. b) Solve the equation to find the dimensions of the rectangle.
asked by Aspen on January 27, 2018 
Math
From a point 120m from the foot of a building, the angles of elevation of the top and bottom of the flagpole are 49 degrees and 46 degrees respectively. Find the height of the flagpole (answer 13.8m) I couldn't get the answer because I thought the question
asked by Anonymous on May 21, 2015 
math
A standard deck of playing cards had 52 cards. These cards are divided into four 13 card suits: diamonds, hearts, clubs, and spades. Find the probability of drawing a heart or a club at random from a deck of shuffled cards.
asked by Anonymous on March 9, 2016 
linear algebra
A signal lac has six flags of which 1is blue ,two z white,3 ar red.it sends messages hostin flags in a flagpole.d messages ar being conveyed by d order in which d colours ar arranged find hw many mesaages it can send.......a.using exactly six flags,b.using
asked by victor on August 31, 2016 
Pre Cal
An open box is formed from an 80cm by 80cm peice of metal by cutting four identical squares from the corners and folding up the sides. Express the volume of the box in terms of x. Then describe how you could find the maximum possible volume.
asked by Jen on January 9, 2010 
math
A researcher wishes to estimate the proportion of college students who cheat on exams. A poll of 490 college students showed that 33% of them had, or intended to, cheat on examinations. Find the margin of error for the 95% confidence interval.
asked by jennifer on May 6, 2012 
College Chem
Calculate the enthalpy of reaction from the standard enthalpies of formation of the reactant and product molecules. 2C2H6+7O2>4CO2+6H20 I am using the back of my book for the standard enthalpies of formation, but cannot seem to find the HoF for C2H6?
asked by Betsie on May 8, 2011 
math
Find the maturity value of the undiscounted promissory note that states that Phillip Esterey borrowed $4,000 for a period of 7 months with ordinary interest at 7%. The date of the note was December 17, 2008. The maturity date was July 17.
asked by Taylor on October 13, 2013 
Physics
a pilot must fly a destination 520 km away in a direction of N30 degree E. The air speed of the plane is 320Km and the wind speed is 85 km/h E20 degree Suth. Find the heading of the plane and the time for the trop.
asked by Jessica on October 4, 2009 
economics
you find out that your aunt works for a defense manufactuing compnay that has several defense contracts with the government. she tells you that she works for a team that is producing a communications satellite. what kind of good is that; individual, merit,
asked by Anonymous on July 14, 2010 
math
500 people invited for a function. Tickets for male, female and children are rupees 748, 712 and 45 respectively. The total amount collected is 3 lakh. Find the number of male, female and children. Pls help!!
asked by sharmi on July 12, 2015 
Algebra 2
The height h(t), in feet, of an airborne teeshirt t seconds after begin launch can be approximated by h(t)= 15t^2+120t+10,0
asked by CC on October 18, 2012 
Math
Find the lateral area of the cone. Use 3.14 fo pi and round result to the nearest whole unit. radius: 15cm Side unit: 28cm Please help!! A) 1,319 cm squared B) 2,639 cm squared C) 707 cm squared D) 2,026 cm squared is the answer B?
asked by Help PLEASE on January 13, 2015 
Help with math
I am stuck on a probability question. Please help and tell me the easiest way to find the answer to this.. I am confused and keep getting 5/6 A fair die is rolled..what is the probability of rolling an odd number or a number less than 3? the actual answer
asked by HM on November 2, 2011 
Math
Each table in the cafateria seats 8 people. Find the total number of people that can be seated at 7,8,9, and 10 tables.if the average bill per person is $12, how much money can the cafeteria expect from 7,8,9, and 10 tables that have no empty seat? All I
asked by Unknown on September 17, 2012 
Physics
Two boxes are stacked in an elevator that is accelerating downwards at 3.49m/s/s. A smaller 3.06kg box is on top and a larger 9.93kg box is on bottom. Find the magnitude and direction of the force that the smaller mass exerts on larger.
asked by Josh on November 4, 2016 
phys
Heat Q flows spontaneously from a reservoir at 481 K into a reservoir at 298 K. Because of the spontaneous flow, 2760 J of energy is rendered unavailable for work when a Carnot engine operates between the reservoir at 298 K and a reservoir at 249 K. Find
asked by Redgy22 on December 2, 2012 
BIOLOGY
Botulism (a toxin produced by bacteria that causes food poisoning) and curare (a natural poison) inhibit the action of acetylcholine. What symptoms would you expect to find in someone exposed to botulism or curare? Provide an explanation for the symptoms.
asked by Lucy on October 3, 2009 
math
You are surveying students to find out their opinion of the quality of food served the school cafeteria. You decide to poll only those students who buy hot lunch on a particular day. Is your sample random? Explain? Can you explain me this im not sure if it
asked by FluttershyK22 on April 26, 2016 
calculus
The beacon on a lighthouse makes one revolution every 20 seconds. The beacon is 300 feet from the nearest point, P, on a straight shoreline. Find the rate at which the ray of light moves along the shore at a point 200 feet from P.
asked by fati on June 16, 2012 
PHYSICS
A velocity selector consists of electric and magnetic fields described by the expressions vector E = E k hat bold and vector B = B j hat bold, with B = 0.0140 T. Find the value of E such that a 670 eV electron moving along the negative x axis is
asked by bad at physics on November 2, 2013 
HELP MATH
I am stuck on a probability question. Please help and tell me the easiest way to find the answer to this.. I am confused and keep getting 5/6 A fair die is rolled..what is the probability of rolling an odd number or a number less than 3? the actual answer
asked by HM on November 2, 2011 
math
from the top of a vertical mast 150m high,two huts on the same ground level are observed. One due east and the other due west of the mast. Their angles of depression are 60° and 45° respectively. Find the distance between the huts. Solutuons with diagram
asked by Folorunsho on January 17, 2017 
statistics
The following are all quiz scores of a student in a statistics course. Each quiz was graded on a 10point scale. 10,6,7,6,5,8 Assuming that these scores constitute an entire population, find the standard deviation of the population. Round your answer to at
asked by apple on December 19, 2011 
Math
A monument consists of two cubical blocks of granite, the smaller resting on the larger. The total height of the monument is 5 feet, and the area of the exposed surface is 61 square feet. Find the dimensions of the blocks. Help please>.< Thank you in
asked by Lina on June 1, 2014 
math (explanation and answer)
A conical drinking cup is made from a circular piece of paper of radius R inches by cutting out a sector and joining the edges CA and CB. Find the radius, height and volume of the cone of greatest volume that can be made this way
asked by Linda on April 9, 2015 
calc (with through steps)
A conical drinking cup is made from a circular piece of paper of radius R inches by cutting out a sector and joining the edges CA and CB. Find the radius, height and volume of the cone of greatest volume that can be made this way
asked by Linda on April 9, 2015 
Math
This is on the 2008 Free response AP Calc AB exam #4a. Let f be the function given by f(x)=(lnx)(sinx). The figure above shows the graph of f for 0
asked by Cindy on April 12, 2016 
calc (plz, with steps and explanations)
A conical drinking cup is made from a circular piece of paper of radius R inches by cutting out a sector and joining the edges CA and CB. Find the radius, height and volume of the cone of greatest volume that can be made this way
asked by Linda on April 9, 2015 
Family and Consumer Sciences
I am doing a sewing project. I need to decide what project to do. I have four choices. I need find pros and cons. I am having trouble finding the right format for these pros and cons. they need to be written like " I chose the bunny because it costs less
asked by Fluffy_Bunny on November 29, 2016 
Calculus
(This problem uses a TI89 calculator) Find the largest and smallest values of the following function on their given intervals: y=(cos x)^x [1.5, 4.75] This is what I put in the calculator (home screen): fMin((cos(x))^x,x I 1.5 < x < 4.75 (I = "with"
asked by Anonymous on June 8, 2009 
math(trig)
1) What's the linear velocity of a point on the tip of a 6ft propeller turning at 1200 revolutions per min? 2) A gear is driven by a chain that travels 90m/min. Find the radius of the gear if it makes 50 revolutions per minute.
asked by confused on December 6, 2010 
Math
Janice and Thomas are roller blading around Sampson Pond. It takes them 4 minutes to complete a lap. Write and solve an equation to find how many laps they can complete in one hour if they continue roller blading at this pace.
asked by Anonymous on September 6, 2018 
Calculus (repost)
This problem uses a TI89 calculator) Find the largest and smallest values of the following function on their given intervals: y=(cos x)^x [1.5, 4.75] This is what I put in the calculator (home screen): fMin((cos(x))^x,x I 1.5 < x < 4.75 (I = "with"
asked by Anonymous on June 8, 2009 
geometry
Draw the unit circle and a firstquadrant ray from the origin that makes an angle theta with the positive xaxis. Let B be the point on this ray whose xcoordinate is 1, and let A = (1, 0). Segment AB is tangent to the circle. In terms of theta, find its
asked by yadlay on April 13, 2010 
physics
A 28.6g bullet is fired from a rifle. It takes 2.36 × 103 s for the bullet to travel the length of the barrel, and it exits the barrel with a speed of 710 m/s. Assuming that the acceleration of the bullet is constant, find the average net force exerted
asked by michelle on December 5, 2012 
Physics
The human ear can detect sounds with frequencies between 20 Hz and 20kHz. Find the largest and smallest wavelengths the ear can detect, assuming that the sound travels through air with a speed of 343 m/s at 20°C. smallest ___m largest____m
asked by Steve on April 16, 2012 
Algebra
The height h in feet of an object after t seconds is given by the function h=16t^2+70t+5. How long will it take the object to hit the ground? Round your answer to the nearest thousandth. If that is the function, you need to have a value for the height to
asked by Angela on July 12, 2007 
maths
from a certain spot, the top of a triangle had an angle of elevation of 40 degree. move 15meter in a straight line towards the flag pole.Now to the top has an angle of elevation of 60degree.Find the height of the flagpole and it's distance from the second
asked by basit on May 26, 2016 
algebra
Ryan Left The science Museum and drove south Gabriella left three hours later driving 42 km/h faster in an effort to catch up to him . after two hours Gabriella finally caught up find ryans average speed
asked by Evee on November 16, 2010 
Math (Right Triangle Trig)
Suppose tan(theta)=5/7 and theta belongs to Quadrant III, find the exact value of sec(theta)? I already took the steps to solve this problem but I am confused if whether or not sec(theta)is positive or negative sqrt(74)/7 Any help is greatly appreciated!
asked by Giovanni on June 5, 2016 
college algebra
A propane tank has the shape of a circular cylinder with a hemisphere at each end. The cylinder is 6 feet long and volume of the tank is 5pie cubic feet. Find, to the nearest thousandth of a foot the length of the radius x.
asked by Missy on April 16, 2012 
Math (Statistics)
Hi! Can someone help me with these two questions? Thanks a bunch! :) 1.) What causes experimental probability to match theoretical probability? In theory heads and tails occur 50/50. 2.) Find a way to estimate the time to flip a coin 10,000 times; 100,000
asked by Becky on January 23, 2015 
physics
A 601kg car stopped at an intersection is rearended by a 1660kg truck moving with a speed of 14.5 m/s. If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of both vehicles after the
asked by stoicrider77 on November 2, 2012 
social studies
can someone help me find a website for this timeline, please. create a timeline tracking the following major themes/paradigm shifts in American history from the beginnings of the Cold war in 1945 to the end of the Cold war in the early 1900's
asked by dellaine on April 11, 2010 
physics
A 853kg car stopped at an intersection is rearended by a 1450kg truck moving with a speed of 16.0 m/s. If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of both vehicles after the
asked by ashlon on November 8, 2012 
math
A car dealer will sell you a used car for $6,298 with $798 down and payments of $165.51 per month for 48 months. i found the total amount paid which is 8742.48 and interest paid is 2444.48 how do i find the interest rate?
asked by gisela on September 29, 2014 
Chem 1
Why is this phrase, “Lewis Structure” a misnomer? I've googled it... and I can't seem to find an answer. Any suggestions as to where I can read some info on that? Lewis implies ionic bond, structure implies fixed covalent bonds. Screw you, that's
asked by Rossi on October 25, 2006 
physics
A conductor 400mm long moves at a uniform speed of 4 m/s at a right angles to a uniform magnetic field of flux density 4.7 Tesla. Find then induce emf? F=BIL sin degrees 4.7*0.4*4*sin 90 degrees = 7.52
asked by Eren A on June 4, 2015 
physics  i need A.S.A.P
An object of mass 1.5 kg is placed on a rough horizontal surface, as shown in Figure 1. Force F acts on the object. When the magnitude of F is 10 N, the object just begins to slide. Determine the coefficient of static friction between the object and the
asked by mimi on May 2, 2011 
math
Shane invests $11,000 in bonds that earn simple interst of 6%. The interest is payable at the maturity of bonds after 5yrs. Find the total amount that shane will receive after 5yrs. PLZ SHOW WORK
asked by paully on November 7, 2010 
Math
A particle is moving at some constant speed. Use the following information to answer the following questions. s(t)=100/t©÷+12; t¡Ã0; see represents feet and t represents seconds a)Find the velocity and acceleration equations for this particle. b)When
asked by Kelsey on March 6, 2008 
Physics
In an Atwood machine, one block has a mass of M1 = 520 g and the other has a mass of M2 = 320 g. The frictionless pulley has a radius of 4.6 cm. When released from rest, the heavier block moves down 51 cm in 1.00 s (no slippage). What is the tension T1?
asked by Spencer on November 5, 2011 
physics
Two point sources produce waves of the same wavelength and are completely out of phase (that is produces a crest at the same time as the other produces a trough). At a point midway between the sources, would you expect to find a node or an antinode? Why?
asked by silly on May 2, 2011 
Precalculus
Let z and w be complex numbers such that 2z2=25, z+2w=5, and z+w=2. Find z. I first squared both equations and expressed the square of the magnitudes in terms of the complex numbers and its conjugates. Next, I summed the equations together and
asked by majorbill on February 16, 2015 
Physics 11
A 62kg cyclist changes the speed of a 12kg bicycle from 8.2m/s to 12.7m/s. Determine the work done. I used change in energy = work to find work against inertia which was 3479.85 Then I used V^2=V.^2 + 2ad to get ad=47.025 I then used W=mad to get work
asked by Kayla on May 23, 2017 
Maths
Suppose you were to leave $100 to be equally divided between your great great grandchildren 100 years from now. Given that you can secure annual interest at 6% pa, what would this amount be? Find the compound interest, compounding monthly? Please show all
asked by Jannie on February 7, 2011 
Geometry
I've been working forever to figure out this problem! If two flagpoles are 10m and 70m tall and are 100m apart, find the height of the point where a line from the top of the first to the bottom of the second intersects a line from the bottom of the first
asked by Spencer on January 16, 2008 
physics
A 4m wooden platform weighing 160 N is suspended from the roof of a house by ropes attached to its ends. A painter weighing 640 N stands 1.2 m from the lefthand end of the platform. Find the tension in each of the ropes
asked by joy on March 3, 2012 
Math
Find the resultant in magnitude and direction of forces 10N, 20N, 30N, 40N, acting respectively in the direction 60,120,180 and 270. I tried drawing out the forces with the respective angles but the angles are more than 360.#confused
asked by Shade on November 26, 2016 
home economics
Use the Expenditure Equation for GDP (GDP = C + 1 + G + XN). Using your research skills, find the values for each sector for the years 1929 and 1933. Determine the percentage change for the two years. Explain the drastic change and what this meant for the
asked by Anonymous on February 23, 2014 
Mathematics
If Z= [tan 2x i(sin x+cos x)]/[1+i sin x] is completely imaginary, find x.(0
asked by Kimasha on May 20, 2017 
Physics
In an Atwood machine, one block has a mass of M1 = 520 g and the other has a mass of M2 = 320 g. The frictionless pulley has a radius of 4.6 cm. When released from rest, the heavier block moves down 51 cm in 1.00 s (no slippage). What is the tension T1?
asked by Morgan on November 5, 2011 
Chemistry
Chlourine monoxide reacts with flourine gas to give a new unknown gas that contains Cl, O and F. In an experiment you find that 0.15476 g of the new gas has a preasure of 17mmHg ina 1850 mo flak at 21ºC. What is thd identity of the unknown gas?
asked by Anonymous on November 1, 2017 
physics
A 18.5 g bullet is fired from a rifle. It takes 2.70 103 s for the bullet to travel the length of the barrel, and it exits the barrel with a speed of 660 m/s. Assuming that the acceleration of the bullet is constant, find the average net force exerted on
asked by Anonymous on September 21, 2011 
Math
The temperature dropped 18 in 6 hours last night. The equation below can be used to find n, the average number of degrees the temperature changed each hour during that period. 18/6=n 3 12 24 THIS ONE 108 2. In the following equations, a and b are
asked by HI on February 4, 2018 
Please Help!!!!!!
A hot hair balloon is rising vertically 20 ft/sec while the wind is blowing horizontally at 15 ft/sec. Find the speed v of the balloon and the angle x it makes with the horizontal. I know how to solve this problem, but I don't understand why or how you
asked by Desperate!!!! on November 21, 2011 
statistics
adult males have normally distributed heights with mean of 69.0 in and a standard deviation of 2.8 in. if a clothing manufacture decides to produce goods that exclude the shortest 12% and the tallest 12% of adult males, find the minimum and maximum heights
asked by kevin on April 24, 2013 
PHYSICS PLEASE HELP
This question has two parts: First: A typical steel Bstring in a guitar resonates at its fundamental frequency at 240 Hertz. The length of the string is 0.640 m. What is the wave velocity along the string?. Second: Find the wavelength of the third
asked by College student in need of help on March 31, 2011 
physics
a uniform weightless rod 8 meters long weighing 800N is supported horizontaly by two ropes hung 2 meters from its ends.Find the force in each rope when a painter weighing 700N stands from one ends.
asked by ryan naboa on August 1, 2012 
physics
The shell’s trajectory curves downward because of gravity, so at the time t = 0.217 s the shell is below the straight line by some vertical distance ∆h. Find this distance ∆h in the absence of air resistance. The acceleration of gravity is 9.8 m/s 2
asked by Noah on September 2, 2012 
math
you purchase an suv for $26,000. A year later the car is worth only $24,800. If the value of the car continues to depreciate at that rate, a. find the linear equation that determines the value of the car based on the number of years you own it. b. when
asked by jen on March 7, 2010 
Precalculus
The instruments with an aircraft show that it is headed east with an airspeed of 180 mph. After 2 hours, the aircraft is actually 375 miles east and 20 miles north of its starting point. Find the wind speed and its direction.
asked by Merry on March 26, 2017 
Math
Estimate the are under the curve f(x)=x^24x+5 on [1,3]. Darw the graph and the midpoint rectangles using 8 partitions. Show how to calculate the estimated area by finding the sum of areas of the rectangles. Find the actual area under the curve on [1,3]
asked by Jesse on November 18, 2010 
Physics
A 21.3g bullet is fired from a rifle. It takes 3.77 × 103 s for the bullet to travel the length of the barrel, and it exits the barrel with a speed of 779 m/s. Assuming that the acceleration of the bullet is constant, find the average net force exerted
asked by Kendall on October 11, 2012 
physics
Helium balloons are used regularly in scientific research. A typical balloon would reach an altitude of 45.0 km with an air density of 4.3×10−3 kg/m3. At this altitude the helium in the balloon would expand to 540000.0 m3. Take g=10 m/s2. Find the
asked by Anonymous on December 14, 2013 
College Algebra
Jen recently rode her bicycle to visit her friend who lives 12 miles away. On her way there, her average speed was 10 miles per hour faster than on her way home. If Jen spent a total of 1 hour bicycling, find the two rates.
asked by Jenn on September 30, 2014 
math
10/20 + 11/13 I know I have to first find the LCM which is 260. Then I found the equivalent fractions which were 130/260 and 220/260. When I add those I get 350/260 which is an improper fraction. Then I change that to a mixed number fraction. The answer I
asked by John on January 25, 2016 
calc 3
A woman walks due west on the deck of a ship at 4 mi/h. The ship is moving north at a speed of 15 mi/h. Find the speed and direction of the woman relative to the surface of the water. (Round your answers to one decimal place.)
asked by abby on September 1, 2012 
mathematics
a boat travels 12 km upstream and back in 1 hour and 45 min.if the speed of the current is 3 km/h throughout,find the speed of the boat in still water,giving your answer correct to 3 decimal place. NOTE:(Answer is 14.3 km/h,so can any one show me the
asked by alyshan on September 3, 2008 
math
the Nile River is the longest river in the world that 4160 miles a group of explorers travel along the entire now in xx days they traveled the same distance each day write an algebraic expression to find out each day's distance
asked by karla on October 1, 2015 
math URGENT!!!!!!
a 12x12inch square is divided into n^2 congruent squares by equally spaced lines parallel to its sides. circles are inscribed in each of the squares. find the sum of the areas of the circles... please answer and explain how you got this answer!!!
asked by dss on November 15, 2012 
Physics
Electrons are accelerated though a potential of 60V and then from a beam that hits two slits separated by 2.5x10^8m. (a) What is the wavelength of these electrons (hint: first find the momentum)? (b) How far is the second order bright spot from the center
asked by genius on April 28, 2012 
Physics
A lamp 10 cm high is placed 60cm in front of a diverging lens of focal length 20 cm. By means of a scale ray digram, locate the image and determine the height. I'm not too sure how i would find the distance of the image, as it is a diverging lens
asked by Sarah on June 4, 2008 
Physics
Hi, I have the following question: 1. The index of refraction for a prism is given by the equation: n = 1.58 − (6.41 x 10^4)λ where λ is the wavelength in meters. Light is incident at 28°. Find the exit angle ß for light of a) 800 nm b) 633 nm c) 540
asked by Joseph on March 7, 2010 
physics
Two gerbils run in place with a linear speed of 0.60m/s on an exercise wheel that is shaped like a hoop.Find the angular momentum of the system if each gerbil has a mass of 0.22kg and the exercise wheel has a radius of 8.5 cm and a mass of 5.0 g.
asked by Anonymous on December 1, 2010 
College Algebra & Trigonometry
A weight is attached to an elastic spring that is suspended from a ceiling. If the weight is pulled 1 inch below its rest position and released its displacement in inches after t seconds is given by x(t)=2cos(5ðt+ð/3). Find the first two times for which
asked by Lira on May 2, 2014 
geometry
A grain storage tank is in the shape of a cylinder covered by half a sphere. The height of the cylinder is 50 feet and its diameter is 80 feet. find the total surface area (including the base) and volume of the tank.
asked by Kristen on April 21, 2009 
Sciences
A model airplane whose mass is 875 grams flies in a horizontal circle of radius 3.46 m at the end of a string which is at an angle of 10.5o below the horizontal. Find: a) The tension in the string. b) The speed of the airplane. I have answers but I am
asked by TCC on July 2, 2013 
Statistics
The weights of male babies less than 2 months old in the United States is normally distributed with a mean of 11.5 pounds and a standard deviation of 2.7 pounds. Find the 80th percentile score for these weights. I don't have a table, I have to figure it
asked by Jeri Jackson on February 25, 2014 
physics
A swimmer can swim in stillwater at a rate 4 kilometre per hour. If he swims in a river flowing at 3 kilometre per hour and keeps his direction with respect to water perpendicular to the current,find his velocity city with respect to the ground
asked by dhandip on January 26, 2017 
Simple Interest
Hi guys, I'm new here, my name is Markus. Can you help me with one simple question? I think I know what it is, though. If any of guys respond back, thank you! $300 at 5 annual interest for 7 years. Find the simple interest earned in the account. a. $214.29
asked by Markus on January 2, 2016 
math
Find the maturity value of the undiscounted promissory note that states that Phillip Esterey borrowed $8,000 for a period of 8 months with ordinary interest at 10%. The date of the note was August 1, 2008. The maturity date was April 1.
asked by Anoymous on May 20, 2015 
physics
Heat Q flows spontaneously from a reservoir at 481 K into a reservoir at 298 K. Because of the spontaneous flow, 2760 J of energy is rendered unavailable for work when a Carnot engine operates between the reservoir at 298 K and a reservoir at 249 K. Find
asked by Redgy22 on November 30, 2012 
physics
A 15.7g bullet is fired from a rifle. It takes 3.00 × 103 s for the bullet to travel the length of the barrel, and it exits the barrel with a speed of 779 m/s. Assuming that the acceleration of the bullet is constant, find the average net force exerted
asked by trish on December 16, 2015 
chemistry
Data: SO2(g)+ 1/2O2(gas)forms SO3(g)Delta H = 99.1 kJ. Given the above data, calculate the enthalpy change when 89.6 g of SO2 is converted to SO3. Is this a grams to moles conversion or what? I can't find any examples of this type of calculation.
asked by lavonne on October 27, 2010 
algebra
a survey of 2,000 people was given to find their mode of transportation to work each day. the pie chart gives the results of people surveyed Bike 3.8% taxi 9.8% walk 3.4% bus 14.6% drive 68.4% how many traveled by bike to work?
asked by lisa on October 31, 2015 
Calculus
a police helicopter is flying at 200 km/hr at a constant altitude of 1 km above a straight road. The pilot uses radar to determine that an oncoming car is at a distance of exactly 2 km from the helicopter, and that this distance is decreasing at 250 km/hr.
asked by Alex on November 8, 2010 
Chemistry
Using the total volume at endpoint (51.98mL) and the fact that the concentration of CrO4 ^2 due to Mohr's indicator is 0.26 M, find the actual concentration of CrO4^ 2 at the endpoint (or at the instant just before Ag2CrO4 begins to form). Any help I am
asked by josh on April 2, 2012
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