# hey guys, i follow you up to the point of intergrating the final line. How would I intergrate [x^-2.e^-x] dx thx

49,088 questions, page 181
1. ## physics

lets say two capacitors C1 and C2 1uF each are connected in series with a voltage source 5v. One of the capacitors C2 has an initial voltage of 1v and the other has no charge on it initially.What is the final voltages across the capacitor C2?

asked by Venkatarama on September 10, 2012
2. ## Physics

A 1-kg ball initially moving with a speed of 3m/s strikes a stationary 2kg ball head-on. After the collision both balls stick together. What are the final velocities of the two balls?

asked by Nate on April 6, 2015
3. ## ssct

(phyics) question: calculate the final temperature of the water if 400grams of water at 80degress Celsius is poured into a 100grams pot at 30dgrees Celsius .

asked by arjet on December 6, 2012
4. ## physics

A 1.0 kg red superball moving at 5.0 m/s collides head-on with stationary blue superball of mass 4.0 kg in an elastic collision. What are the final velocities of the two superballs after the collision?

asked by anonymous on November 20, 2009
5. ## Math

5 2/3 - 5= 2/3. Use a division algorithm to find the quotient. State the final answer as a mixed number. Why is the fractional part of your quotient different from your answer in the original equation 5 2/3 - 5= 2/3?

asked by Shannon on December 14, 2016
6. ## Physics

Two identical boxcars (m = 14866 kg) are traveling along the same track but in opposite directions. Both boxcars have a speed of 5 m/s. If the cars collide and couple together, what will be the final speed of the pair?

asked by Cindy on October 20, 2016
7. ## physics

How many grams of KOH are required to neutralized 300ml of 5.0 N HN03 solution? final answer nyan 84 grams kailangan nalang namen ng solution

asked by jhon earl on April 10, 2012
8. ## physics

A delivery truck travels 20 blocks north, 15 blocks east and 18 blocks south. What is its final displacement from the origin? Assume the blocks are equal length.

asked by jake on August 28, 2012
9. ## physics

How much heat ( In calories)is needed to warm 200 grams of water from an initial temperature of 24 degrees celsits to a final temperature of 84 degrees celsuis

asked by teresa on September 24, 2013
10. ## Physics

A 400-g block of copper at a temperature of 85°C is dropped into 300 g of water at 33°C. The water is contained in a 250-g glass container. What is the final temperature of the mixture?

asked by Seth on November 29, 2011
11. ## Chemistry

The solubility product constant of Calcium hydroxide is 6.5 * 10^-6 . If 0.10 mo of sodium hydroxide is added to 1 L of 0.0001 M Ca(OH)2, what is the final concentration of the calcium ion? Show your work.

asked by Ian on May 18, 2016
12. ## chemistry

what is the final temperature of amixture containning 25 grams of ice at -20 degree celciusadded to water at room temperature 22oC mass of water is 50g

asked by treasa on May 8, 2014
13. ## physics

Suppose 2 moles of an ideal gas are enclosed in a container of volume 2.70·10^4 m^3. The container is then placed in a furnace and raised to a temperature of 390 K. What is the final pressure of the gas?

asked by maria on December 27, 2011
14. ## physics

Two identical boxcars (m = 14866 kg) are traveling along the same track but in opposite directions. Both boxcars have a speed of 5 m/s. If the cars collide and couple together, what will be the final speed of the pair?

asked by Sue on October 19, 2016
15. ## Physics

The same amount of heat entering identical masses of different substances produces different temperature changes. Calculate the final temperature when 1.50 kcal of heat enters 1.25 kg of the following, originally at 22.5°C.

asked by Nina on November 26, 2014
16. ## Physics

A 3.9 kg body is initially moving northward at 15 m/s. Then a force of 13 N, toward the east, acts on it for a time of 3.8 s. At the end of that time, what is the body's final velocity? (magnitude and direction)

asked by Dante on October 22, 2007
17. ## Chemistry

Can you find me a sample data of the experiment on the standardization of a basic solution, NaOH? (with initial and final readings for HCl buret and NaOH buret)

asked by Anonymous on April 20, 2007

pls, help! this is hard and confusing! 1. How does runoff affect a community? (1 point) Runoff can supply new homes and businesses with the water that they need. Runoff can provide the water that fish in streams and lakes rely on. Runoff can prevent

asked by TTR+S<3 on January 27, 2014
19. ## Physics for life scince

6.At the end of the 7th second the brakes are applied and the car slows down at a constant rate till it comes to rest in 5s. What is the acceleration? 7.Draw the v vs.t graph 8.find the final displacement: a)by using the graph b)by algebraic calculations

asked by Simeon on March 23, 2010
20. ## Science (Physics)

I need help with these. I'm so confused! Thanks! 1.) An F-14 Tomcat fighter jet goes from rest to a speed of 75m/s in 2.5 s. What is the acceleration? 2.) Preston tossed a red ball upward and it reaches a maximum height of 3.0m What is the final velocity

asked by Leah on October 16, 2014
21. ## college

What social, political, and economic changes pulled the North and the South farther apart? · What was the final determining factor that led to Southern secession? · What social and economical changes discussed in previous chapters fueled sectional

asked by Anonymous on December 3, 2009
22. ## Biomechanics/Physics

A 125 pound female is late for her biomechanics final and after arriving dashes up 40 steps each 15cm high in 1.65 seconds to take a seat and start the test. Hint: 1 lb = 4.47N How much work did she perform running up the steps?

asked by Frank on May 7, 2016
23. ## Finance

Business Investment A firm of attorneys deposits \$5000 of profit-sharing money at the end of each semiannual period for years. Find the final amount in the account if the deposits earn 10% compounded semiannually.

asked by Anonymous on June 10, 2010
24. ## Covenant polytechnic. Aba.

Two converging lenses having power of +2.0 and +20.0 diopter are used to give magnifications in an astronomical telescope. calculate the angular magnification of the telescope when (I).in normal adjustment. (ii).The final image is formed at the least

asked by Ewuosa Destiny on August 21, 2015
25. ## physics

A 600 kg dragster accelerates from rest to a final speed of 120 m/s in 400 m (about a quarter of a mile) and encounters an average frictional force of 1200 N. What is its average power output in watts and horsepower if this takes 7.30 s?

asked by Deborah on July 9, 2013
26. ## ssc

a student titrated a 1.0115 g sample of potassium hydrogen phthalate (hkc8h4o4 204.2285g/mol with sodium hydroxide. the initial buret reading was 1.16 ml and final reading 40.62 ml write a balanced equation

asked by soniyah on October 27, 2013
27. ## us history

What social, political, and economic changes pulled the North and the South farther apart? What was the final determining factor that led to Southern secession? What social and economical changes discussed in previous chapters fueled sectional conflict?

asked by amos on July 20, 2010
28. ## AP Chem

In a typical synthesis reaction, 0.142 g of chlorine gas is reacted with an unkown elemnt X to form a compound with the formula XCl3. If the final product has a mass of 0.178 g, what is the atomic mass of the unknown element?

asked by Anna on January 12, 2009
29. ## physical

Question 10 An airplane traveling north at 400 m/s is accelerated due east at a rate of 50 m/s2 for 6 s. If the effects of air resistance and gravity are ignored, what is the final speed of the plane? 1. 300 m/s 2. 400 m/s 3. 500 m/s 4. 700 m/s 5. 800 m/s

asked by Nhlanhla on August 9, 2010

In the final stages of the landing process, a spaceship decelerates at a constant rate of 5.3 m/s2 heading towards the Earth. A 3kg lamp is hanging straight down, attached to the ceiling of the ship cabin by a chain. What is the tension in the chain?

asked by Michael on November 4, 2012
31. ## chemistry

A gas sample contained in a cylinder equipped with a moveable piston occupied 300.0 mL at a pressure of 2.00 atm. What would be the final pressure if the volume were increased to 500.0 mL at constant temperature? Answer should include units.

asked by Kyra on February 18, 2016
32. ## Chemistry

A sample of helium gas initially at 37.0 degrees C, 785 torr and 2.00 L was heated to 58.0 degrees C while the volume expanded to 3.24 L. What is the final pressure in atm? a)1.79 b)3.21 c)0.681 d).517 e)none of the above please explain--I need to know how

asked by Coug on January 3, 2010
33. ## probability

Suppose that we have three engines, which we turn on at time 0. Each engine will eventually fail, and we model each engine"s lifetime as exponentially distributed with parameter λ. The lifetimes of different engines are independent. One of the engines

asked by Fay on November 28, 2018
34. ## Probability - 2

Suppose that we have three engines, which we turn on at time 0. Each engine will eventually fail, and we model each engine"s lifetime as exponentially distributed with parameter λ. The lifetimes of different engines are independent. One of the engines

asked by Noonan on November 29, 2018
35. ## Pre Calc

To determine the height of the Louisiana-Pacific (LP) Tower, the tallest building in Conroe, Texas, a surveyor stands at a point on the ground, level with the base of the LP building. She measures the point to be 320ft from the building's base and the

asked by Phillip on February 12, 2010
36. ## chemistry

A 7.00 g sample of KCl is dissolved in 81.0 mL of water. The resulting solution is then added to 28.0 mL of a 0.790 M CaCl2(aq) solution. Assuming that the volumes are additive, calculate the concentrations of each ion present in the final solution.

asked by JC on March 5, 2014
37. ## Chemistry

Hi I have a question So I have to determine the final concentration of NH4Cl in a calorimeter assuming reaction goes to completion. Given Measurements are: -delta T = 9.25 degrees Celcius -Density of NH4Cl = 1.013 g/mol -capacity of NH4Cl= 3.93 J/g*C

asked by Anonymous on November 20, 2012

How would you go about making 250ml of a 20X stock solution of NaCl to dilute later to a final concentration of 50mM? I know that the molecular weight of NaCl is 58.44 but I am not sure where to start. I need to figure out the amount of NaCl and water

asked by Anonymous on March 26, 2013
39. ## Math

How would you go about making 250ml of a 20X stock solution of NaCl to dilute later to a final concentration of 50mM? I know that the molecular weight of NaCl is 58.44 but I am not sure where to start. I need to figure out the amount of NaCl and water

asked by Anonymous on March 26, 2013
40. ## Algebra 2

I am creating a project for math in which I have to draw an object using: parabolas, hyperbolas, circles,etc. We use conic section equations to identify where they are on the graph. I have confusion about writing the equation of parabolas. I know the

asked by mariya on June 5, 2007
41. ## math

A basketball player makes an average of 10 points for every 15 shots taken. Each shot made by the player is a 2-point shot. The variables in this situation are the number of 2-point shots taken and the number of points made. What is the rate of change for

asked by scoot on June 9, 2013
42. ## Algebra 2

A UFO is first sighted at point A due east from an observer at an angle of 14 degrees from the ground. And at an altitude of 223 m. The UFO is next sighted at point B due east at an angle of 28 degrees and an altitude of 446 m. What is the distance from A

asked by Katy on February 13, 2012
43. ## algebra

A basketball player makes an average of 10 points for every 15 shots taken. Each shot made by the player is a 2-point shot. The variables in this situation are the number of 2-point shots taken and the number of points made. What is the rate of change for

asked by scoot on June 11, 2013
44. ## Physics

Buddy is unloading 7kg cans using a 45 degree downward ramp. The ramp was made slippery by the a detergent spill before. Buddy can push the cans off of his truck with an initial velocity of .2 m/s and it moves as 1.2 m/a by the time it reaches the lowest

asked by Steven on October 7, 2014
45. ## Social Studies

How was/is the law and order kept in the society? We're learning about the government of Ancient Rome. Full Question: How was/is the law and order kept in the society of Ancient Rome and how did the government ensure the society would follow the law?

asked by Tracey on May 24, 2008
46. ## Algebra

1. Evaluate. (8 – 3) (12 ÷ 2 • 2) – 20 Answer: I'm not sure if its -5 or 40 2. 6x – 7 = 5(x – 2) Answer: -3 3. Solve for y. 3x – 2y = 12 Answer: 3x-12/2 4. Solve. –3(x – 3) + 8(x – 3) = x – 9 Answer: 1 1/2 or 1.5 5. Find the slope of

asked by Loreal on December 23, 2007
47. ## Statistics

The following data set represents the repair costs (in dollars) for a random sample of 30 dishwashers. 41.82 52.81 57.80 68.16 73.48 78.88 88.13 88.79 90.07 90.35 91.68 91.72 93.01 95.21 95.34 96.50 100.05 101.32 103.59 104.19 105.62 111.32 117.14 118.42

asked by Josh on October 31, 2009
48. ## Science

Water and gasoline are both clear liquids at room temperature. Describe one physical property and one chemical property that might be used to distinguish between them. Plz help physical:smell chemical: pH value What about density? The density of water is

asked by Pam on September 13, 2006
49. ## Chemistry

What is the volume of Tin(Sn)? Mass of sample = 2.588g Initial vol. of water = 31 m/L Final vol. of water = 32 m/L

asked by Sierra on February 10, 2011
50. ## Biochemistry

You are asked to make 50 mM Tris-HCl pH 7.5. The pK of Tris is 8.1. What is the concentration of the components (Tris and Tris-H+) in the final buffer solution?

asked by Alberto on July 3, 2017
51. ## science

What is the final temperature when you mix 40ml of 40degree celcius water and 25ml of 20 degree celcius water?

asked by nim on November 24, 2010
52. ## math

16 persons need 56 kg of rice in 1 week. How much rice will be needed by 24 persons in four weeks? ^please anyone over here ryt now may you help me to arrive to the final answe^

asked by kelvin on June 29, 2017
53. ## Chemistry

How do I calculate the percent yeild of copper give the mass and concentration of Cu(NO3)2 and the final mass of copper

asked by Dan on November 8, 2015
54. ## Math

An object with initial velocity of 20 m/s accelerates uniformly at 5 m/s in the direction of its motion for a distance of 10 m. What is the final velocity of the object?

asked by Shane on September 27, 2016
55. ## Solution Making

Suppose you start with a 5X solution A, and you want a final volume of 10ul of 1X solution. How much Solution A do you need? Can you please check my work not sure. I need 2 ul of solution A to 8 ul of H2O. 5/1=.2*10=2

asked by frank on February 23, 2015

What is 25% of \$20.00. What is the total cost of the item? I multiplied 20 x .25 and my answer was 5.00 Then I subtracted 5.00 from 20.00 making my final answer \$15.00 for the item. Please tell me if this is correct.

asked by Lane on November 2, 2010
57. ## Physics

A car traveling at 34.7 m/s and barkes with an acceleration of -3m/s^2 for 5 secons. How far does the car travel during the acceleration and what is the final velocity? I really need help on these bad!

58. ## Chemistry

If 1.20g of steam at 100.0 celcius condenses into 38.5 g of water, initially at 27 celcius what is final temperature of water

asked by Rich on May 25, 2013
59. ## physics

a car accelerates with an acceleration of 2m/s2 for 5secs what is its final velocity at the end of 5secs if its initial velocity is 40m/s?

asked by gutema on June 21, 2014
60. ## Chemistry

The volume of a gas is increased from 100mL to 250 mL by heating it.If the original temperture of the gas was 15.0°c what will be the final temperture in °c

asked by Mayra on May 31, 2016
61. ## Problem Solving

John bought a shirt on sale for 25% off the original price and another 25 % off the discounted price. If the final price was \$16, what was the price before the first discount?

asked by Cris on October 9, 2011
62. ## fluids

60 cubic feet of air at 30 PSIG and 50 degrees F is compressed to 80 PSIG and 110 degrees F. What is the final volume?

asked by emma on March 31, 2015
63. ## Chemistry

If you take 3 mLs of a solution that is 4M acetic acid and add enough water to it to make 50 mLs, what is the molarity of the final solution? Thank you!

asked by Artemis on March 20, 2015
64. ## science/math

If a car can go from 0 to 60mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50mi/hr? don't know what equation to use. please help

asked by douglas on September 17, 2014
65. ## math

Decrease a number by 5, divide the result by 2, then add 17 and multiply by 5. If the final result is 100, with what number did you start?

asked by Laura on January 15, 2010
66. ## college

If 75 grams of ice at 0 degrees celsius were added to 1.5 Liters of water at 75 degrees celsius, what would be the final temperature?

asked by Anonymous on November 4, 2010
67. ## physics

A 5-kg block of ice is at a temperature of -27 °C. How much heat must be added to the ice to produce 5 kg of liquid water with a final temperature of 35 oC?

asked by franko on July 29, 2013
68. ## Oceanography

How much heat must be added to turn 3 grams of water at 100°C into a vapor and what will be the final temperature after this much heat is added

asked by Pat on July 7, 2011
69. ## Chemistry

A 10.0g sample of H2O(l) at 23.0degrees C absorbs 209 joules of heat. What is the final temp of the H2O(l) sample?

asked by Sabrina on January 19, 2016
70. ## physics

A truck covers m in 8 s while smoothly slowing down to a final speed of 2.8 m/s. (a) Find its initial speed. (b) Find its acceleration.

asked by david on April 5, 2012
71. ## science

If 1600cals of heat are added to 50g of water initally at a temperature of 10c what is the final temperature of the water?

asked by linece on December 7, 2012
72. ## Chemistry

Energy in the amount of 420J is added to a 35g sample of water at a temperature of 10.0 C . What is the final temperature of water ?

asked by Amy on October 22, 2014
73. ## physical science

for a constant acceleration "a", write an equation relating the final velocity vf and time tf to the initial velocity vi and time ti.

asked by krystal on April 20, 2009
74. ## Physical Science

A 40-kg skater moving at 4 m/s overtakes a 60-kg skater moving at 2 m/s in the same direction and collides with her. The two skaters stick together. What is their final speed?

asked by Jason on September 11, 2011
75. ## Chemistry

If a hydrate was found to contain 12% water and the original weight of the sample was 30g, what will be the final weight of the anhydrous sample?

asked by Ashley on February 23, 2012
76. ## science/math

If a car can go from 0 to 60mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50mi/hr? My answer was -10, is this correct. If not , I need help

asked by douglas on September 17, 2014
77. ## physics

60 cubic feet of air at 30 PSIG and 50 degrees F is compressed to 80 PSIG and 110 degrees F. What is the final volume?

asked by emma on April 2, 2015
78. ## COM 135

Post your response to the following: What is the most effective prewriting technique for your final project? Explain why you chose this prewriting technique.

79. ## Chemistry

How would I calculate this? 30.0 mL of pure water at 280. K is mixed with 50.0 mL of pure water at 307 K. What is the final temperature of the mixture?

asked by Mary on June 30, 2013
80. ## Physics

A force of 36.7 N acts on a ball for 0.3 sec. If the ball is initailly at rest (a) What is the impulse on the ball? (b) What is the final momentum of the ball?

asked by Anonymous on July 7, 2014
81. ## physics

what is the final temperature when 3 pound of water at 100 degree fahrenheit is added to 500 lb at 40 degree fahrenheit

asked by sarah on March 26, 2014
82. ## Alg 2

x^6-y^6 fist look at as a difference of squares: (x^3)2 - (y^3)2 =(x^3 + y^3)(x^3 - y^3) Now you have the sum of cubes and the difference of cubes, I assume you know the formulas for those. So you can keep going (x+y)(x^2-xy+y^2)(x-y)(x^2+xy+y^2) would be

asked by Bri on August 3, 2007
83. ## chemistry

Energy in the amount of 470 J is added to a 30.0 g sample of water at a temperature of 9.00 degrees C. What will be the final temperature of the water?

asked by Mary on January 16, 2012
84. ## Physics

A cart rolls down a hill, if the cart weighs 8.7kg and the cart starts at a height of 3.0m, what is the final velocity of the cart?

asked by Anonymous on February 17, 2014
85. ## Physical Science

A 40-kg skater moving at 4 m/s overtakes a 60-kg skater moving at 2 m/s in the same direction and collides with her. The two skaters stick together. What is their final speed?

asked by Jason on September 11, 2011
86. ## Chemistry

what is the wavelength of a photon emitted during a transition from the initial state(ni)=5 state to the final state(nf)=2 state in the hydrogen atom?

asked by masre man on November 23, 2018
87. ## Chemistry

The volume of a gas with a pressure of 1.2 atm increases from 1.0 L to 4.0 L. What is the final pressure of the gas, assuming constant temperature?

asked by Soojung on August 28, 2008
88. ## Physical Science

A 40-kg skater moving at 4 m/s overtakes a 60-kg skater moving at 2 m/s in the same direction and collides with her. The two skaters stick together. What is their final speed?

asked by Help on September 11, 2011
89. ## Math

when you have a final answer that is 5-4√5/10 can you reduce it? If so can you also reduce the -4?

asked by Anonymous on January 9, 2018
90. ## Math PLZ HELP

when you have a final answer that is 5-4√5/10 can you reduce it? If so can you also reduce the -4?

asked by Anonymous on January 9, 2018
91. ## com 155

Have I used good and well correctly? In my opinion, your book is very good. The text is extremely well written. You did well explaining the rules of grammar. I am a good reader and this book was easy to follow and understand. I especially like the

asked by blake on June 7, 2011
92. ## Math !!!!!!!!

Ok i have a Summer Math Assignment & i really need help on this qs. it's part B of the qs. so i'll show you the whole thing Part 2. Extended Reponse Qs. (2 points each) Answer each qs.. Show all Work Qs. 5 Adrian correctly solved two equations in math

asked by Gen on September 5, 2011
93. ## physics

A projectile, fired with unknown initial velocity, lands 18.4 s later on the side of a hill, 3290 m away horizontally and 409 m vertically above its starting point. (Ignore any effects due to air resistance.) (a) What is the vertical component of its

asked by yelya on August 25, 2011
94. ## Pre Calc

I do not see why I got two different equations for my answer A weight attached to the end of along spring is bounicng up and down. As it bounces, its distance from the floor varies sinusoidally with time. You start a stopwatch. When the stopwatch reads 0.3

asked by Joe on December 10, 2009
95. ## Physics

Two cars lost in a blinding rainstorm are traveling across a large field, each thinking they are on the road. They collide. If the distance between them is 174 meters and the red car is traveling at 6 mph at a 45 degree angle toward the impact point, and

asked by Jay on September 3, 2013
96. ## science help PLS

Scientists earlier believed that the lowest measurable temperature is the freezing point of ice. However, modern scientists believe that temperatures below the freezing point of ice can also exist. What best accounts for these different opinions?

asked by Oscar on January 13, 2016
97. ## Physics

A box slides from rest down a frictionless ramp inclined at 35.0° with respect to the horizontal and is stopped at the bottom of the ramp by a spring with a spring constant of k = 3.50 104 N/m. If the box has a mass of 12.0 kg and slides 3.00 m from the

asked by Anonymous on October 23, 2014

Point E(0, -2) is a vertex of square DEFG. After a 90* clockwise rotation of the square about the origin, which of the following is the location of E? A. (-2,0) B. (2,0) C. (2,2) D. (0,2) Point D(-3,5) is a vertex of triangle DEF. After rotation of the

asked by gavin on October 15, 2015
99. ## physics

A sphere has a radius of 0.20 meters and has a uniform surface charge density equal to 6.3 micro coulombs per meter squared. A second point charge has a magnitude of 0.58 micro coulombs and is 0.61 meters away from the center of the sphere. Find the

asked by doug on March 17, 2012
100. ## statistics

The accounting department at Weston Materials, Inc., a national manufacturer of unattached garages, reports that is takes two construction workers a mean of 32 hours and a standard deviation of 2 hours to erect the red barn model. Assume the assembly times