# Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140

91,718 questions, page 516
1. ## Physics

1) Please describe the structure of a hurricane,and how they work. Include a discussion of how energy is transferred from the warm ocean water up to the sky.

asked by Devynn on November 6, 2014
2. ## math

Find the volume of the solid formed by rotating the region enclosed by y=e^4x+3 y=0 x=0 x=0.7 this is my work V = ∫ e^4x dx {between x=0 and x=0.7} = 1/4 e^4x {between x=0 and x=0.7} = 1/4 (e^2.8 - e^0) = 1/4 (e^2.8 - 1) however i am etting the wrong

asked by sonia on October 29, 2009
3. ## Physics

How much work is done to move a 1400 kg car from rest to 25 m/s.If this takes place over a distance of 130 m, what is the average net force?

4. ## to ms.sue

today we are coming up with 5 fractions that has 3 different prime numbers. will 56/84, 93/99, 45/65, 73/64, or 84/92 work. which one? P.S- can you be my private tutor? If you say yes, can we you help me every Fridays at 4:00. If Im not online on Friday at

asked by Celest on March 21, 2012
5. ## to ms.sue

today we are coming up with 5 fractions that has 3 different prime numbers. will 56/84, 93/99, 45/65, 73/64, or 84/92 work. which one? P.S- can you be my private tutor? If you say yes, can we you help me every Fridays at 4:00. If Im not online on Friday at

asked by Celest on March 21, 2012
6. ## Physics

Two uncharged metal spheres, spaced 20.0 cm apart, have a capacitance of 28.0 pF. How much work would it take to move 14.0 nC of charge from one sphere to the other? *Please report answer in Joules.

asked by JOTHEY on March 3, 2010
7. ## science

How do uneven heating of the planets surface and the coriolis effect work togahter to produce global wind patterns

asked by kayla on January 19, 2010
8. ## voc 3

She worked really hard on the project. The suffix -ed in the italicized word in the sentence above illustrates that the work happened in the past tense.

asked by desha on March 7, 2012
9. ## statistics

Assume you want to estimate with the propoportion of student who commute less than 5 miles to work(20) with in 2%, what sample size would you need. Total in survey is 233

asked by kathy L on February 28, 2013
10. ## Writing

Is there a contest when you make your own literay maganzine (full of their art work and stories or poems they wrote) and the winner get it publish????

asked by Lauren on December 17, 2011
11. ## Pre Calc

Find the work done by a force F of 30 pounds acting in the direction (2,3) in moving an object 3 feet from (0,0) to the point in the first quadrant along the line y = (1/2)x.

asked by Em on May 25, 2011
12. ## sentence

can u tell me what this means. i don't under stand it, the home work sheets say they want the kids to " write one sentence about your favorite dr.seuss center "

asked by rene on March 2, 2010
13. ## To Jordan, Brittany, and Kate ~

Your umpteen posts have been removed. Here’s the way this website works: You post a question you have about your assignment, and then tell us what you think about it all so far. Then we can tell what help you need and work with you on your answers.

asked by Writeacher on November 15, 2011
14. ## science

25. Perform the following conversions. (Do your work on scratch paper and then type answer.) A. 105 m = cm B. 2000 mL = L C. 3400 g = kg D. 0.985 km = m E. 2345 mm = m F. 34 kg = g

asked by katie on September 1, 2016
15. ## Physics

Calculate the work required to pull a wagon along a horizontal road for 4.0x10^2 m at a constant speed of 3.0 m/s if the force of friction is 8.0 N.

asked by Richard on April 28, 2015
16. ## Physical Science

While rearranging a dorm room, a student does 310 J of work in moving a desk 1.5 m. What was the magnitude of the applied horizontal force?

asked by Anonymous on September 18, 2016
17. ## American History

In the 1840s, the Spanish recruited _______ laborers to work on plantations in Cuba. A. Chinese B. Vietnamese C. Japanese D. Indonesian

asked by Victoria on January 21, 2014
18. ## physics

a car is pushed along at 2.50 times 10^3 kg from rest creating 5000 joules of work. It moves 25 meters. what is the horizontal force ?

asked by tee on October 27, 2011
19. ## Literature

Yesterday Ms. Sue gave me wikipedia so i can find What is a tragic mulatto? Is there anyway someone can give me that definition because I can't get the website to work on my computer. Thank you.

asked by Unknown on November 1, 2009
20. ## Psychology

I am doing a journal review paper. What are the implications of this work (i.e. what light does it shed on the particular topic related to psychology)? I do not understand the question. What is it asking me to do?

asked by Ana on November 14, 2012
21. ## Physics

friction force does -200 J of work on a baseball player of mass 45.0 kg when she has stopped after sliding into second base. what was her initial velocity?

asked by Luke on October 24, 2018
22. ## English

I'm writing an easy about my hero. I need s strong into sentence with a a action work. So carving have "Taylor swift has impacted my life..''

asked by EnglishLove on March 9, 2011
23. ## Chemistry/Physics

When 1mol of a gas burns at constant pressure, it produces 2430J of heat and does 5kJ of work. Calculate change in H, q, and in kJ?

asked by Vanessa Ozuna on November 20, 2014
24. ## health

Which cells identify as the ones most likely to hold the key to increased human longevity and vitality and how might this work? Describe one alternative to cloning

asked by Linda on January 16, 2015
25. ## Functions & Trig

evaluate each function at the given value: f(n)=-n^6+31n^4+26n^3+20n^2+-33n-20 when n=6 I was thinking that I should do synthetic division, but I've tried it a few times and I can't get it to work out correctly. Please help!

asked by Kerry on January 26, 2016
26. ## Functions & Trig

evaluate each function at the given value: f(n)=-n^6+31n^4+26n^3+20n^2+-33n-20 when n=6 I was thinking that I should do synthetic division, but I've tried it a few times and I can't get it to work out correctly. Please help!

asked by Kerry on January 26, 2016
27. ## math

I'm trying to factor a problem and cannot seem to get it to work out --- 12a^3 + 10a^2 - 8a I first factored out the gcf of 2 to get 2a(6a^2 + 5a - 4) From there I keep coming up with answers that are incorrect when I check them -- any suggestions please?

asked by Carly on April 23, 2018
28. ## Operations Research

The Ploughman family farm owns and operates a 640-acre farm that has been in the family for several generations. The Ploughman’s always have had to work hard to make a decent living from the farm and have had to endure some occasional difficult years.

asked by Meme on April 22, 2013
29. ## Physics

if a 120-g mass is placed at the 25-cm mark and a 25-g mass at the 10-cm mark, where should a 500-g mass be placed to balance the system?

asked by Megan on December 7, 2010
30. ## physics

Find the center of mass of the three mass system given that m1 1.90 kg and m2 1.30 kg Specify relative to the center of the left mass "1.00 kg "

asked by ami on October 6, 2010
31. ## physics

The center of a 4.0 kg sphere and a 7.5 kg sphere are separated by a distance of 1.5 m where is the center of mass of the two sphere system

asked by melissa on February 4, 2008
32. ## Physics

If a 100-g mass was placed at the 25-cm mark, and a 20-g mass at the 10-cm mark, where should a 500-g mass be placed to balance the system?

asked by Lila on January 14, 2014

1. A positively charged test object is moving toward the positive source charge in an electric field. What happens next??? A. its potential energy decreases. B. Its potential energy increases. C. Its potential energy stays the same. D. Its potential energy

asked by HELP MEEEEE on December 4, 2014
34. ## ECONOMICS HELP

a draft system, whether professional sports or the military, enable those who are hiring to A.avoid paying a living wage B.produce what they produce at a lower cost C.educe the cost of labor D.transfer part of the cost of labor to someone other than

asked by Brittany on October 11, 2010
35. ## intro to economics

a draft system, whether professional sports or the military, enable those who are hiring to A.avoid paying a living wage B.produce what they produce at a lower cost C.educe the cost of labor D.transfer part of the cost of labor to someone other than

asked by Brittany on October 11, 2010
36. ## History

Which identifies the Department of Homeland Security’s online operation that monitors the Internet to detect cyber threats? Comprehensive National Cybersecurity Initiative Cybersecurity Resource Center Cybersecurity National Action Plan National

asked by Heather on August 5, 2018
37. ## Physics

Please help ~ Two blocks are arranged at the ends of a massless string as 3.21 kg (box hanging from table) 4.96 kg (box on table). The system starts from rest. When the 3.21 kg mass has fallen through 0.4 m, its downward speed is 1.27 m/s. The acceleration

asked by CR on February 21, 2011
38. ## physics

A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 4.6 kg m^2. A second student tosses a 1.5 kg mass with a speed of 2.9 m/s to the student on the stool, who catches it at a

asked by nikki on March 17, 2011
39. ## math

Jim wants to deposit money in an account to save for a new stereo system in two years. He wants to have \$4,000 available at the time. The following rates are available to him: 6.2% simple interest 6.1% compounded annually 5.58% compounded semiannually

asked by Sabrina on April 25, 2011
40. ## Chemistry

Consider the reaction N2(g)+3H22NH3(g). What is the effect of decreasing the volume on the contained gases The reaction shifts toward the product gas The system reacts by increasing the number of gas molecules*** the pressure on the gases decreases

asked by Jordan on May 4, 2016
41. ## physics

A block of mass 0.22 kg can slide on a frictionless incline (Ø = 30º) and is connected via a string to a vertical spring (k = 3.6 N/m). The system starts at rest with the spring at its natural length. (a) What is the maximum distance along the incline

asked by Jill on October 7, 2011
42. ## physics

A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 4.6 kg m^2. A second student tosses a 1.5 kg mass with a speed of 2.9 m/s to the student on the stool, who catches it at a

asked by nikki on March 18, 2011
43. ## Math/Management

FuelMotion is an oil company that owns two oil processing plants that produce gasoline from crude oil. Their Georgia Plant produces 2 thousand gallons of premium, 1 thousand gallons of medium, and 6 thousand gallons of regular gasoline every day it

asked by Carla on October 17, 2012
44. ## Turbulence

Hi there, In a turbulent motion the length scale (l) and the time scale (t) of the smallest eddy motions vary according to: length scale: l/L = Re^(-0.75) time scale t/(L/U) = Re^(-0.5) (actually there should b that symbol for proportionality rather than

asked by Akhtar on April 12, 2011
45. ## Algebra 1 A

I need some help with my Algebra project. I already finished task on but I'm unsure of how to solve my inequality. Please help. Task 1 Summary: You are going to decide on a summer business to start. Figure out what you will do, how much it will cost you,

asked by Cassidy on November 27, 2016
46. ## Physics

The system shown in the ﬁgure is in equilibrium. A 15 kg mass is on the table. A string attached to the knot and the ceiling makes an angle of 54◦ with the horizontal. The coeﬃcient of the static friction between the 15 kg mass and the surface on

asked by Hardy on November 1, 2012
47. ## Astronomy - help!

The earliest fossil records indicate that life appeared on Earth about a billion years after the formation of the solar system. What is the most mass that a star could have in order that its life-time on the main-sequence is long enough to permit life to

asked by anonymous on October 29, 2008
48. ## Law

Can anyone link me to a detailed list of possible careers in the legal system? I already have some of the basic knowledge down. Prisoner. Judge court clerk law clerk legal librarian legal reporter paralegal lawyer policeman, or trooper jailer probation

asked by Anonymous on January 21, 2007
49. ## Criminal Justice -rsearch and statistics

I have to write a description of an original research project at least 4 pages long. I have to formulate a theory based on any subject that is relevant to the criminal justice system. My theory should be a definitive statement . There are 3 sections;

asked by Lonni on June 21, 2012
50. ## Social Studies

Which of the following statements would describe a strength of the Articles of Confederation? A. The Confederation Congress could pass taxes. B. The federal court system handled all judicial matters. C. Any law passed by the Confederation Congress would

asked by Amber on October 28, 2015
51. ## physics

A cylindrical air duct in an air conditioning system has a length of 3.5 m and a radius of 5.00 X 10^-2 m. A fan forces air (ç = 1.8 X 10^-5 Pa·s) through the duct, such that the air in a room (volume = 242 m3) is replenished every 12 minutes. Determine

asked by elmira on December 12, 2010
52. ## physics

A cylindrical air duct in an air conditioning system has a length of 3.5 m and a radius of 5.00 m. A fan forces air (ç = 1.8 Pa·s) through the duct, such that the air in a room (volume = 242 m3) is replenished every 12 minutes. Determine the difference

asked by student on December 6, 2010
53. ## physics help

A cylindrical air duct in an air conditioning system has a length of 3.5 m and a radius of 5.00 10-2 m. A fan forces air (ç = 1.8 1 x0-5 Pa·s) through the duct, such that the air in a room (volume = 242 m3) is replenished every 12 minutes. Determine the

asked by peter on December 4, 2010
54. ## Bio

What is an advantage of using an organism's scientific name rather then its common name? A.The scientific name is always given in the native language B.The scientific name is based upon the organism's kingdom and phylum C.The scientific name does not

asked by Anonymous on April 21, 2016
55. ## Chem

Sodium cyanide NaCN is a solid which melts at 564C to give a liquid that conducts electricity, It also dissolves in water to give a conduction solution. Deduce the type of bonding that holds the compound together and why? Write a balanced chemical equation

asked by Anthony on March 12, 2007
56. ## Physics

1.)When do action and reaction forces within a system not cancel each other? a.)When the action force is double the resistance of friction =b.)When the reaction force is contained in separate events c.)Never, they always cancel each other d.)Only on

asked by Ariel on July 13, 2010
57. ## criminal justice

Police are what to the criminal justice process? Good question, I'm curious too. Good luck getting an answer! I imagine that you could call them the "mentors". The see that the rules are followed. Police enforce the laws of the criminal justice system.

asked by kim on February 22, 2007
58. ## physical chemistry

The system N2O4 2NO2 maintained in a closed vessel at 60º C & a pressure of 5 atm has an average (i.e. observed) molecular weight of 69, calculate Kp. At what pressure at the same temperature would the observed molecular weight be (230/3)

asked by kriti on May 12, 2013
59. ## Chemistry

Given the following reaction: 3 H2(g) + N2(g) 2NH3(g) + heat If the following changes were to occur what direction shift will it have (left or right) And what will be the reason of the shift Changes/Stress on system: Adding NH3 Decreasing the pressure

asked by Sarah foster on August 3, 2015
60. ## physics

Consider a stationary skater of mass 60 kg. Another skater of mass 40kg rushes and holds the first at a speed of 12km/hr. Both skaters hold together and move as one system (S) with a speed V. a) Determine V. b) Determine the kinetic energy of (S) before

asked by angy on October 4, 2016
61. ## Physics

The system shown in the following figure is in static equilibrium. Find the frictional force exerted on block (m1) given that the mass of block (m1) is 8.90 kg, the mass of block (m2) is 2.59 kg, and the coefficient of static friction between block (m1)

asked by Eric Sowell on June 9, 2016
62. ## physics

A 10 kg cart was observed moving north with a speed of 15 m/s before it collided with an identical cart at rest. The collision was observed to cause the carts to couple and move together as one. What is in Joules the kinetic energy of the system of both

asked by Elisabeth on September 20, 2011
63. ## Chemistry

Given the following reaction: 3 H2(g) + N2(g) 2NH3(g) + heat If the following changes were to occur what direction shift will it have (left or right) And what will be the reason of the shift Changes/Stress on system: Adding NH3 Decreasing the pressure

asked by Sarah foster on August 3, 2015
64. ## Research & Evaluation I

I have an airplane that has an ignition system that works like this. There are 2 energy producing devices, called magnetos that "fire" the spark plugs, 2 per cylinder. There is a 1 in a 1000 chance that one will fail. What is the chance that one or the

asked by Joan on May 29, 2010
65. ## college

Do some research into why the United States has been so slow to adopt metric measurements. What problems does this cause for the United States? What benefits might it bring the United States? How might you resolve the gap between the United States'

asked by ca on October 23, 2010
66. ## Chemistry (Equilibrium)

Consider the following equilibrium system at 900°C: H20(g) + CO(g) H2(g) + CO2(g) Initially 5.0 moles of H2O and 4.0 moles of CO were reacted. At equilibrium, it is found that 2.0 moles of H2 are present. How many moles of H2O remain in the mixture? Would

asked by Jessica on November 12, 2014
67. ## Physics

Could a simple machine such as a lever, a pulley system or a hydraulic jack be considered a heat engine? Explain your answer. I feel that its the hydraulic jack because if friction is created, heat is also created. I'm not sure though.

asked by Bunny on January 2, 2011
68. ## Physics

Could a simple machine such as a lever, a pulley system or a hydraulic jack be considered a heat engine? Explain your answer. I feel that its the hydraulic jack because if friction is created, heat is also created. I'm not sure though.

asked by Abida on January 2, 2011
69. ## Chemistry Equilibrium Constant

The initial pressures for I2 (g), H2(g), and HI(g) were Pi2 = 0.100 atm, Ph2 = 0.200 atm, and Phi = 0 atm, respectively. After the system came to equilibrium, the pressure of I2 (g) became very low, PI2 = 1.00 x 10^-5 atm. Calculate the equilibrium

70. ## Physics

a student attaches a mass to the end of a 0.80 m string. The system will be whirled in a horizontal circular path at 31.5 m/s. The maximum tension the string can withstand without breaking is 250 N. What is the maximum mass the student can use?

asked by Dee on November 1, 2011
71. ## physical science

A 6 kg bowling ball rolling at 5 m/s strikes a stationary 4 kg bowling ball. If ball #1 is moving forward at 2 m/s after the collision, what is the speed and direction of ball #2? What is the impulse of the system? If the collision last for .5 seconds, how

asked by junior on June 22, 2011
72. ## physics

A 6-kg bowling ball rolling at 5 m/s strikes a stationary 4-kg bowling ball. If Ball #1 is moving forward at 2 m/s after the collision, what is the speed and direction of Ball #2? What is the impulse of the system? If the collision last for .5 seconds, how

asked by ANN on June 29, 2011
73. ## Stats

A car rental agency currently has 43 cars available, 27 of which have a GPS navigation system. Two cars are selected at random from these 43 cars. Find the probability that both of these cars have GPS navigation systems. Round to four decimal places.

asked by Anonymous on October 21, 2013
74. ## Math - Algebra 1

Each cow eats 4.5 cups of feed a day and the bucket it comes in contains 250 cups. The buckets cost \$26.75 each. If a farm has 16 cows, how much will it cost to feed all of the cows for 1 week? (system of equations) Cost____________________

asked by Lauren on January 24, 2017
75. ## college chemistry

the normal freezing point of the element mercury, Hg(l), is a -38.9°C and its molar enthalpy of fusion, ΔHfusion=2.29 KJ/mol. What is the entropy change (J/K) of the system when 50 g of Hg(l) freezes at the normal freezing point. Hg= 200.59 g/mol

asked by Jamaal on December 6, 2010
76. ## physics

A small ball of mass 2.00 kilograms is moving at a velocity 1.50 meters/second. It hits a larger, stationary ball of mass 5.00 kilograms. What is the kinetic energy of the system after the collision if the collision is elastic?

asked by marie on October 10, 2012

a 4.0kg block is attached to a vertical rod by two strings.when the system rotates about the axis of the the rod,the strings extend.What is the tension in the lower cord if tension on upper cord is 60N ?

asked by Tasnia Elahi on October 17, 2014

ok, i tried to do what you told me but i cant solve it for c because they cancel each others out! the integral for the first one i got is [sin(c)cos(x)-cos(c)sin(x)+sin(x)+c] and the integral for the 2nd one i got is [-sin(c)cos(x)+cos(c)sin(x)-sin(x)+c] I

asked by K on November 29, 2010
79. ## chem

3.0 mol sample of KClO3 was decomposed according to the equation 2KClO3 = 2KCl + 3 O2 How many moles of O2 are formed assuming 100% yield? is it 3 moles? I don't want to work through the details of this problem completely. Tell me what you don't understand

asked by jill on July 17, 2007
80. ## Biology

In a population of jaguars, a gene with two alleles encodes the fur color. Allele B causes melanism (dark fur) and is dominant over allele b, which results in light colored fur. Suppose that there is a migration event, producing a population with 60% BB,

asked by Joe on January 28, 2013

1) Which statement below is correct (true)? a) Since HNO2 is a stronger acid than HF it must have a greater pKa. b) Since HOCℓ is a stronger acid than HCN, then OCℓ– is a stronger base than CN–. c) The dissociation (or ionization) of HOCℓ in

asked by Hannah on March 24, 2012
82. ## Physics

n early method of measuring the speed of light makes use of a rotating slotted wheel. A beam of light passes through one of the slots at the outside edge of the wheel, travels to a distant mirror, and returns to the wheel just in time to pass through the

asked by Mark on July 27, 2010
83. ## Accounting

The Dec. 31, 2001, balance sheet includes the following items: 9% bonds payable due 12/31/2010 \$800,000 Discount on bonds payable \$21,600 The bonds were issued on December 31, 2000, at 97, with interest payable on June 30 and December 31 of each year. The

asked by Cindy on February 13, 2009
84. ## Chemistry

Expt #1- Molecular Weight of Unknown Acid Unknown Acid: #2 Mass of Unknown solid acid transferred:0.414g Volume of volumetric flask: 100.00 mL Concentration of NaOH: 0.0989 M Aliqot of acid titrated with NaOH: 25.00 mL Average volume of Naoh from

asked by Rayana on October 10, 2010
85. ## physics

a golf ball of mass 0.045kg is moving in the x-direction with a speed of 9.0 m/s, and a baseball with mass 0.145kg is moving in a negative y-directionwith a speed of 7m/s. what are the magnitude and direction of the total momentum of the system consisting

asked by daisy jean on September 23, 2013
86. ## Health pe

The peripheral nervous system (select all that apply) . Is made up of the brain and spinal cord. . Links the body to the brain and spinal cord *** .is made up of sensory and motor neurons **** . Is responsible for thought and reason

asked by Anon on May 1, 2017
87. ## Physics

an ice skater with a mass of 80kg pushes off against a second skater with a mass of 32kg. both skaters are initially at rest. a. what is the total momentum of the system after the push off? b. if the larger skater moves off with a speed of 3m/s, what is

asked by Titi on November 10, 2009
88. ## Science ~ Astronomy

Which evidence provides support for the nebular theory: a) scientists have observed the formation of a distant solar system b) the nebular theory has been proven mathmatically c) astronomers have observed protoplanetary disks around distant newborn stars

asked by Zee on June 6, 2016
89. ## History

How does the federal court system decide which criminal cases to take? A) they take cases that have already seen state courts B) a grand jury decides if each case has merit •• C) they take cases that are being appealed D) a Supreme Court justice

asked by Hills on October 14, 2016
90. ## Physics

Two balls of different masses are set at a height of 3 m above the ground on a frictionless table. The ball on the left is of mass 2M and the ball on the right has a mass of 3M. They both are released simultaneously and slide onto the part of the table 2 m

asked by Irish on January 6, 2014
91. ## physics

suppose you want to design an air bag system that can protect the driver at a speed of 100 km/h if the car hits a brik wall estimate how fast the air bag must inflate to effectively protect the driver ?

asked by nour on November 19, 2011
92. ## Health and pe

The peripheral nervous system (select all that apply) Is made up of the brain and spinal cord Links the body to the brain and spinal cord Is made up of sensory and motor neurons Is responsible for thought and reasoning Is it b and c?

asked by Anonymous on January 29, 2016
93. ## health

The peripheral nervous system (select all that apply) Is made up of the brain and spinal cord Links the body to the brain and spinal cord Is made up of sensory and motor neurons Is responsible for thought and reasoning I think it could be b and c?

asked by Ashley on May 2, 2016
94. ## physics

A fly lands on one wall of a room. The lower left-hand corner of the wall is selected as the origin of a two-dimensional Cartesian coordinate system. The fly is located at the point having coordinates (1.80, 1.15) m. (a) How far is it from the corner of

asked by Nancy on October 4, 2009
95. ## physic

The star nearest to our solar system is said to be 3.8 ly away. How many km. away is this if a spaceship can travel at the speed 100 times that sound , how long armed it take that spaceship to travel from the earth to the nearest star. Express your answer

asked by presalie on July 24, 2011
96. ## Health and pe

The peripheral nervous system (select all that apply) Is made up of the brain and spinal cord Links the body to the brain and spinal cord Is made up of sensory and motor neurons Is responsible for thought and reasoning Is it b and c?

asked by Anonymous on January 29, 2016
97. ## Gen Chem 125

A process takes place at constant pressure. The volume changes and the temperature increases by 91.0oC. The heat capacity of the system at constant volume, CV, is 695.6 kJ/oC. What is ΔE in kJ? (Careful--pay attention to the units of the heat capacity.)

asked by dr on March 10, 2017
98. ## Physics

Little Norma has mass 20kg and wants to use a 4.0-m board of mass 10kg as a seesaw. Her friends are busy, so Little Norma seesaws by herself by putting the support at the system's center of gravity when she sits on one end of the board. How far is she from

asked by Ashley on June 8, 2010
99. ## Physics

A 35.41-g sample of Cu(s) at 96.73°C was added to a constant-pressure calorimeter containing 148.3 g of H2O(l) at 25.20°C. The final temperature of the system was 26.66°C. Assuming no heat loss to the surroundings, what is the calorimeter constant?

asked by cry baby on September 25, 2012
100. ## Economics

5. (Ch. 17 # 5) Sparkle is one firm of many in the market for toothpaste, which is in long-run equilibrium. a. Draw a diagram showing Sparkle’s demand curve, marginal revenue curve, average cost curve, and marginal cost curve. Label Sparkle’s

asked by Amanda on April 8, 2007