# Questions Asked onApril 25, 2011

1. ## math

what is the answer to What Do You Get if a Bunch of Bad Guys Fall in the Ocean?

2. ## Chemistry

A 500 mL metal cylinder holding 0.100 moles of helium gas is known to rupture at a pressure of 10 atmospheres. At what temperature, in °C, will the container fail? Here is what I came up with: T= (1.00mol x 0.0821 LxATM/KxMOL) / 10atm x 0.5L =0.01642K

3. ## Chemistry

Ideal gas law question A 4.0 liter container has two gases inside, neon and argon. It is known that at 18 °C, the total pressure of the combined gases is 0.850 atm. If it is known that there are 0.100 moles of neon in the container, how many moles of

4. ## Chemistry URGENT! I really need help!

Consider the following reaction occurring at 298K BaCO3(s)-> BaO(s) + CO2 (g) show that the reaction is not spontaneous under standard condition by calculating delta G rxn. I calculated delta G and got 219.7 kJ, now the question asks if BaCO3 is placed in

asked by Trista Nigh
5. ## Chemistry

PCl5 --> PCl3 + Cl2 (Kp = 630 at 546 K) A system is prepared by placing equimolar amounts of the three gases shown in the equation above in a suitable rigid container held at constant volume. Equilibrium is established at 546 K. (A) When equilibrium is

6. ## Calc

Use differentials to approximate the change in the volume of a cube when the side is decreased from 8 to 7.99 cm. (in cm^3) Thank you so much!!

7. ## physics

A 0.20-kg mass is hung from a vertical spring of force constant 55 N/m. When the spring is released from its unstretched equilibrium position, the mass is allowed to fall. Use the law of conservation of energy to determine (a) the speed of the mass after

8. ## Geometry

Both Trapezoids are similar. The area of the smaller trapezoid is 26 ft. square. Which is the best approximation for the area of the larger trapezoid if the base is 20 ft. in the smaller trapezoid base is 16 ft.

9. ## math

write 20 million,five hundred thousand in expanded form using exponents

10. ## physics

The figure below shows two examples of SHM, labeled A and B. (The vertical axis is marked in increments of 0.2 m and the horizontal axis is marked in increments of 0.5 s.) What are the following quantities for each SHM? A B (a) the amplitude 1 m 2 m (b)

11. ## chem.

How many grams of CO2 and grams of H2O are produced when 13.0g C2H2?

12. ## the parts of speech

1. In the following sentence, identify the part of speech of the italicized word. Large fish swim swiftly in the sea. A. Verb B. Noun C. Adjective D. Adverb 2. In the following sentence, identify the part of speech of the italicized word. Large fish swim

13. ## Chemistry

Calculate the solubility of calcium sulfate in grams solute per 100 grams of solvent. Assume that the volume occupied by the solute in the solution is negligibly small. (Ksp for CaSO4 = 2.4 X 10^-5)

14. ## chemistry

How many grams of O2 are required to burn 13.0g of acetylene?

15. ## math

a sidewalk is built 10 bricks wide by laying each brick side by side. How many inches wide is the sidewalk if each brick measure 3 5/8 inches wide?

16. ## math

Name the property that is illustrated. A. 7x6=6x7 B. 7+(1+9)=(7+1)+9

17. ## Spanish

6. Mi abuela tiene un abrigo de ____ en su guardarropa, pero casi nunca lo lleva. a. pelo b. madera c. piel d. algo C? 9. Dicen que el aire en el campo es más ______ que en la ciudad. a. contaminada b. puro c. guapo d. sucia Not sure.. 11. "¿Qué me

18. ## physics

A monochromatic light beam with energy 204eV is used to excite the Be+3 (H –like atom with Z=4) from its ground state to some excited state m. Neglect the finite nuclear mass correction. a) Find the quantum number m of this excited state. b) Following

19. ## algebra

If license numbers consist of 3 letters followed by 3 digits, how many different licenses could be created having at least one letter or digit repeated?

20. ## Chemistry

Suppose you had an unknown solution that contained either dissolved NaCL, or NaNO3. You added AgNO3 to the unknown solution and observed that no solid forms. What can be concluded about the unknown solution? (use the solubility rules

21. ## trig

what is angular velocity if 57 revolutions are completed in 8 minutes?

22. ## Calculus

A ostrich farmer wants to enclose a rectangular area and then divide it into four pens with fencing parallel to one side of the rectangle (see the figure below). He has 820 feet of fencing available to complete the job. What is the largest possible total

23. ## statistics

According to Beautiful Bride magazine, the average age of a groom is now 26.2 years. A sample of 16 prospective grooms in Chicago revealed that their average age was 26.6 years with a standard deviation of 5.3 years. What is the test value for a t test of

24. ## analogy

arson:crime rose:_________ It must be 7 letters long.

25. ## Calc

Use differentials to approximate the change in the volume of a cube when the side is decreased from 8 to 7.99 cm. (in cm^3) Thank you so much!!

26. ## Algebra

A farmer plans to plant 270 acres of his farm with wheat and soybeans. For every 2 acres of land planted with soybeans, the farmer wants to plant 7 acres of land with wheat. The farmer uses the following system of equations to determine how many acres of

27. ## physics

Hydrogen atom is initially in the ground state. It is excited by a photon bombardment and it then undergoes a transition from n = 3 to n=2 state. a) What is the frequency of the bombarding photon? b) What are the energy, momentum and the wavelength of the

28. ## Chemistry

How many milliliters of 18 M H2SO4 are required to react with 250 mL of 2.5 M Al(OH)3 if the products are aluminum sulfate and water?

29. ## Chemistry

I need the structural formulas for the organic compound 1,3,5 Trichlorocyclohexane

30. ## calc

The rate that an object cools is directly proportional to the difference between its temperature ( in Kelvins) at that time and the surrounding temperature (in Kelvins). If an object is initially at 35K, and the surrounding temperature remains constant at

The engine of a train has a mass of 5x10^4 kg. it can accelerate six railway cars having a total mass of 3x10^5 kg by 0.4 m/s^2 (the 6 railway cars have a combined mass of 3x10^5). what acceleration can the same engine using the same force give to four

asked by Jess J
32. ## math

State whether the events described are independent or dependent and determine the probability: A card is pulled from a well shuffled deck of standard playing cards and is not put back in the deck. A second card is drawn from the deck. What is the

33. ## chemistry

A 1.00-g sample of carbon from a modern source gave 15.3 disintegrations per minute. A sample of carbon from an “old” source gave 920 disintegrations per hour. What is the age of the “old” sample of carbon? The half-life of carbon-14 is 5.73×103

34. ## Calc

A particle moves along a path described by x=cos³t and y=sin³t. The distance that the particle travels along the path from t=0 to t=π/2 is... Thank you!

35. ## physics(help!!!!!!!)

A 1200kg car going 25m/s is brought to a stop using its brakes. Assuming that a total of approximately 20kg of iron in the brakes and wheels absorbs the heat produced by friction. What was the car’s original kinetic energy and after the car has stopped,

36. ## math

a carpet measures 7 meters 3 decimeters in length and 4 meters 2 decimeters in width. what is its area in square meters?

37. ## Algebra 2

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation. x – 2y = 2 x + 3y = 17

38. ## Physics

Two parallel wires carry currents in the same direction. I1=3A and I2=1A and the distance between the conductors is 4 cm. The magnetic field midway between these two wires is

44. ## Physics

I have been working on this homework question for a bit, but I just can't get it. Please help me! Where must an object be placed with respect to a convex lens (f=20cm) to generate an upright image that is 4 times as large as the object? 10 cm in front 10

45. ## Physics

Two parallel wires carry currents in the same direction. I1=3A and I2=1A and the distance between the conductors is 4 cm. The magnetic field midway between these two wires is

46. ## math

i really need help with my homework so i can graduate in time. i have only 3 questions that i need help with because math is my weakest subject. so can someone please help me. 1. the formula for converting centigrade temperature to Fahrenheit is F = 9/5 C

47. ## Calc

What is the limit as x approaches infinity of 4xsin(1/x)? Can you also show me how you get the answer? Thank you so much!!

48. ## Trigonometry

If sin A=3/5 and cosB = 24/25 and angle A and angle B are both in quandrant 1. What is sthe exact value of cos (A-B)?

49. ## Physics

Tom Brady passes a football – at a velocity of 50 ft/s at an angle of 40 degrees to the horizontal – toward an intended receiver 30 yd straight downfield. The pass is released 5 ft above the ground. Assume that the receiver is stationary, is isolated

50. ## Chemistry

Suppose you had an unknown solution that contained either dissolved NaCL, or NaNO3. You added AgNO3 to the unknown solution and observed that no solid forms. What can be concluded about the unknown solution? (use the solubility rules

51. ## Physics help please

A middle C (262 Hz) on a flute is heard when an air column that is 0.63 meters long resonates at zero Celsius. a.How fast will sound travel if the temperature increases by 10 degrees? b.By what factor will the frequency change?

52. ## us history

I need help on a small essay on why the embargo act of 1807 wasconsiderd a disaster

53. ## history

Compare Nixon's policies of engagment to foreign policy strategies during the Cold War. Describe the connection between student unrest and the Vietnam War. Explain the political and social outcomes of the end of the war in Vietnam.

asked by Gloria Jackson
54. ## chem

A 2.5L flask @ 15 degrees C cntains three gases. The partial pressure of N2 is 0.32 atm, and the partial pressure of the other two gases, He and Ne are 0.15 atm and 0.42atm respectivly. What is the total pressure in atm on the 2.5L flask?

55. ## chem

How many grams of CaCl2 would be required to be added to water to prepare 1 Liter (1000ml) of a 1.72% (w/v) aqueous solution of CaCl2?

56. ## geology (urgent)

i am having trouble finding how a shield volcano erupts and how a cinder cone volcano erupts. dont they all erupt the same? i gues they dont please help and thank you

57. ## chemistry

The molal freezing point constant for water is 1.86 C/m. at what temperature will a micture of 2.00g of CalCl2 and 25.0g of water freeze?

58. ## physics

A car traveling 50 m/s has tires tires that with radii of 0.25 m. The driver of the car hits the brakes and brings the car to a stop in 5 seconds. What is the angular acceleration of the tires on the car?

59. ## math

A six-sided die with sides numbered 1 through 6 is tossed twice. What is the probability of getting a number larger than 4 on both throws

60. ## math

How many pieces of ribbon 1 4/5 yd long can be cut a length of ribbon 9 yd long?

61. ## Physics

An object, O, is placed 18 cm from the center of a converging lens of focal length, f= 6 cm as shown. O F F (a) On the illustration, sketch a ray diagram to locate the image. (b) Is the image real or virtual? Explain your answer. (c) Using the lens

62. ## Calculus

Could someone work this out so I understand it. Thanks Given the supply function p=S(x)=5(e^0.02x-1) Find the average price (in dollars)over the supply interval [31,36] The 0.02x in the only thing ^ on the e

63. ## Math

Find each probability if you pick one marble, replace it, then pick a second marble. P(black, white) The bag contains 1 black, 2 white and 3 striped.

64. ## Chemistry

I need to know the most polar bond in each molecule. HSCH2CH2OH / HC12F / HOCH2CH2NH2

65. ## 5th grade math

Write twenty million,five hundred thousand in expaned notation form using exponents. would that be (20x10tothe 8thpower)+(500x10to the 5th power)

66. ## Physics

a carton of eggs sits on the horizontal seat of a car as the car rounds a 26 meter radius bend at 16.5m/s. what is the minimum coefficient of friction that must exist between the carton and the seat if the eggs are not to slip?

67. ## Chem Webwork UCI

Complete the table below: What is the pH of the solution created by combining 0.70 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? mL NaOH: 0.70 pH w/ HCl: 1.08 pH wHC2H3O2: 3.23 Complete the table

68. ## math

A box contains 6 red balls, 4 white balls, and 5 green balls. If three balls are drawn in succession without being replaced, what is the probability that they are drawn in the order red, white, green?

69. ## chemistry

A 1.00-g sample of carbon from a modern source gave 15.3 disintegrations per minute. A sample of carbon from an “old” source gave 920 disintegrations per hour. What is the age of the “old” sample of carbon? The half-life of carbon-14 is 5.73×103

70. ## physics

A train whistle emits a sound with a frequency of 1000 Hz when standing in the station. If the same whistle is blown when it is moving away from the station at 40 mph what will be the approximate frequency someone standing at the station will hear?

A 60 year old person has a threshold of hearing of 81.0 dB for a sound with frequency f=10,000 Hz. By what factor must the intensity of a sound wave of that frequency, audible to a typical young adult, (sound level=43.0 dB) be increased so that it is heard

72. ## Accounting

Compute the price of $7,936,343 received for the bonds by using the tables of present value in Appendix A. (Round to the nearest dollar.) Your total may vary slightly from the price given due to rounding differences. Present value of the face amount$

asked by Kieran McCamment
73. ## chemistry

using this equation: Ni+H2SO4=H2+NiSO4 how many liters of hydrogen gas at 298degK and 2.5atm could be produced if you react 25 grams of nickel metal?

74. ## Probability

In a 1970’s game show, a contestant was given a choice of three doors of which one contained a prize. The other two doors contained gag gifts like a chicken or a donkey. After the contestant chose an initial door, the host of the show then revealed an

75. ## Jop Posting Help

What would be some Pros and Cons about working at Baskin Robbins(icecream place)? All I know is that it would probably be fun, but really messy?

76. ## chem

a 9.6L sample of hydrogen gas (H2) @ 88 degrees C is cooled until its final vol was 3.4L. If ther are no pressure changes what is the final temp?

77. ## physics

1. a particle A of mass 150g lies at rest on a smooth horizontal surface. a second particle B of mass 100g is projected along the surface with a speed of u m.s and collides directly with A. on collision the masses coalesce and moves on with a sped of 4 m.s

78. ## physics

Two capacitors of capacitance C_5 = 6.00 \rm \mu F and C_6 = 3.00 \rm \mu F are added to the network, as shown in the diagram. (Part B figure) Find the equivalent capacitance C_B of the new network of capacitors.

79. ## Physics

A ray of light hits a side of Lucite ( n = 1.5) prism at 50 degree. Assuming that the nearest vertex has an angle of 70 degrees, what is the angle of light that leaves the prism.

80. ## statistics

A researcher theorized that people can hear better when they have just eaten a large meal. Six individuals were randomly assigned to eat either a large meal or a small meal. After eating the meal, their hearing was tested. The hearing ability scores (high

81. ## Math

the following stem-and-leaf plot shows the number of books checked out from the school library by each studentin Mrs. Donham's fourth-grade class 0/6 1/1 3 8 2/2 2 3 7 8 3/0 0 0 1 2 4 4 5 6 9 9 4/1 2 5 which interval had the most students a-30-39 b-20-29

82. ## ALGEBRA

A golf ball is tossed straight down out of an airplane. The downward velocity of the ball at various times is given in the table below. SEC AFTER THROW DW VELOSCITY X m/s Y 1 21.8 1.6 27.68 2 31.6 2.2 33.56 What is the slope of the line that firs this

83. ## Math

Mario was on a 21-mile hiking trail.He walked 3/7 of the trail before stopping for lunch.How far did he walk before lunch? Explain your answer

84. ## religion

where can i find Jean Piaget theory on spiritual formation? thanks

85. ## Vocabulary

inhibited is to qualms as

1.I have to correct this sentence- Mi amigo viene de el cine. I think I rewrite it as Mi amigo viene del cine. 2. Ella va a el centro comercial. I think I correct it this way: Ella va al centro commercial. 3. Ellos dorem. I correct it by writing it this

87. ## Math-Functions

If g(x) = (x + 1)/x,find a) g(1) b) g(0) c) g(-1) d) g(x - 1)

88. ## Maths/physics

A particle P of mass m=1 moves on the x-axis under the force field F=36/(x^3) - 9/(x^2) (x>0). Show that each motion of P consists of either (i) a periodic oscillation between two extreme points, or (ii) an unbounded motion with one extreme point,

89. ## math

WHAT IS THE MEAN OF THE FOLLOWING SET OF THE NUMBERS 6,3,12

90. ## Chemistry

Calculate the pH at the following points during the titration of 100.0 mL of 0.20 M acetic acid (Ka for acetic acid = 1.8 x 10-5) with 0.10M sodium hydroxide 1. before addition of any base 2. after addition of 30.0mL of base 3. after addition of 100.0mL of

91. ## Physics

a carton of eggs sits on the horizontal seat of a car as the car rounds a 26 meter radius bend at 16.5m/s. what is the minimum coefficient of friction that must exist between the carton and the seat if the eggs are not to slip?

92. ## Chemistry

Suppose you tired to carry out a double-replacement reaction by mixing together equal volumes if a solution that contained dissolved NaF and a solution NaCl. Would you expect a reaction, if Si write the balanced chemical equation

93. ## physics

A 65 g meter stick has two masses, each 250 g placed upon it. The first is located at 72 cm and the second located at 41 cm. Where should you place your finger if you wished to balance the meter stick? Give your answer in cm.

94. ## social studies

i need to make a passport for marco polo and i need to put the stamps in from venice to china but i don't know the dates please help me

95. ## Psychology

A theory can be defined as: a an attempt to test behavior and thought process. b an accurate description of problem-solving behavior. c the basis for relationships among facts and principles. d the application of the scientific method through statistics. I

96. ## Psychology

Allie has developed a theory concerning test grades. She believes that there is a relationship between her frequency of study and the resulting grade. In order to test her theory, she has to design a/an: a theory b principle c hypothesis d strategy I think

97. ## math

A rectangle has an area of 72 square inches. The length of the longest side is twice the length of the shortest side. What is the length of the rectangle?

98. ## accounting

On July 1, 2010, Brower Industries Inc. issued $8,900,000 of 9-year, 10% bonds at an effective interest rate of 12%, receiving cash of$7,936,343. Interest on the bonds is payable semiannually on December 31 and June 30. The fiscal year of the company is

asked by Kieran McCamment
99. ## statistics

if 24 of the 26 students passed a test what percent of the students passed the test

100. ## Chemistry

I need the name of the following compounds using the IUPAC method: NH2 CH2 | | Br\/ \/\/

101. ## Physics

A crowbar is used to wrench open a wooden crate. The crowbar is situated so that a point 4 cm from the end digging into the box acts as a pivot point. The crobar is gripped on the other side, 35 cm away from the pivot. If the person exerts a force of 114

102. ## Chemistry

106 g of iron at 84.0°C are placed in contact with 205 g of silver at 11.0°C. If no heat is lost to the surroundings, what is the final temperature of the metals? The specific heat of iron is 0.418 J/g·°C and that of silver is 0.251 J/g·°C. 92.0 g of

103. ## 5th grade math

Kat has 30 vehicles. Some are bicycles and some are cars. These vehicles have a total of 88 wheels. How many bicycles are there?

108. ## Social studies

What are some of the elements that contributed to India's rich history?

109. ## Accounting

#9 Unrecorded Liability: Adjusting Entry Refer to PE 4-8. (1) Make the adjusting entry necessary on the company’s books with respect to this loan on December 31. (2) Make the journal entry necessary on the company’s books on the following April 30 to

110. ## Accounting

#15 Supplies: Original Purchase and Adjusting Entry On January 1, the company had office supplies costing $4,600. On March 23, the company bought additional office supplies costing$8,200; the company paid cash. On December 31, a physical count of office

111. ## Com

What is the rythem of the authors writing in the below paragraph? 3. Individuals can be denied credit for a number of reasons. Individuals who are near limits on existing cards, have too much outstanding debt or too many accounts overall, have a history of

112. ## math

State whether the events described are independent or dependent and determine the probability: A bag contains 7 red checkers and 11 black checkers. One checker is drawn and replaced. Then a second checker is drawn. What is the probability that a red

113. ## Socials--no sites.

What happened on April 1st, 1999? Why is this significant? On April 1st 1999, the NorthWest Territories were split in two. This was so significant because it's what created Nunavut and the Western Territory. What does this area have for resources? For

114. ## chemistary

what is the molarity (mol/L) of sodium (Na)in a solution containing 0.4 mole of Na+ cation in 400 mL of an aqueous (water)solution?

115. ## ECONOMICS

How did the gold standard promote stability?

116. ## math

How long will it take a given quantity of carbon-14 to lose 99.9% of its radioactivity if the half life is 5730 years? The formula I have been given is Q=ae^rt This is using log and ln functions.

117. ## Writing

I have to write my rough draft for a research paper. I have to include a thesis statement and an attention grabber. Can someone give me some examples of attention grabbers please?

118. ## Physics

An electron that has velocity v = (3 x 105 m/s) and moves along positive x direction through the uniform magnetic field B = (0.8T) which is along the positive z direction. a. Find the force on the electron (magnitude and direction). (e = - 1.6 x 10-19 C,

119. ## geology (VERY X3 URGENT)

i have an assignment that i have to email back my friend on identifying minerals. simple enough the trouble is how do i write this assignment in "EMAIL FORM" could you helped me please very please...i already finished my assignment now i just have to turn

120. ## Physics

a carton of eggs sits on the horizontal seat of a car as the car rounds a 26 meter radius bend at 16.5m/s. what is the minimum coefficient of friction that must exist between the carton and the seat if the eggs are not to slip?

121. ## trig

What is the shortest possible length of a triangle side facing an angle of 20 degrees, if one of the other sides is 5? (answer should be a decimal number, correct within 0.001)

122. ## chemistry

how many grams of NH3 are in 250 ml of a 20% (w/v) ammonia solution

123. ## english

I was embarrassed that I mispoke. I was embarrassed that I mis-spoke. I was embarrassed that I misspoke.

124. ## Physics

a 800 gram ball at the end of a cord is whirled in an almost horizontal circle of radius 1.50 meters. its tangential speed in the circle is 10 meters per second. What must be the tension in the cord? What angle does the cord make with the horizontal?

125. ## Chemistry - Ksp

i did an experiment where we titrated HCl on calcium hydroxide, and now i am confused with the calculations, i do not know if i am correct, so please help me out... Trial One volume of HCl used - 11.20mL concentration of HCl - 0.04mol/L so to get moles of

126. ## economic

supposes that a borrower and a lender agree on the nominal interest rate to be paid on a loan. Then inflation turns out to be higher than they both expected. Using a method similar to the GDP deflator, compute the percentage change of the overall price

127. ## math

i am a number between 20 and 30. when you put me into 6 equal groups, there is an even number in each group and 1 is left over. what number am i?

128. ## Chemistry

Suppose you tired to carry out a double-replacement reaction by mixing together equal volumes of a solution that contained dissolved NaF and a solution that contained dissolved NaCl. Would you expect a reaction, if so write the balanced chemical equation?

129. ## english

select the sentence that is punctuated correctly. The oil from Eucalyptus trees which are native, to Australia is known for its medicinal properties. The oil from Eucalyptus trees, which are native to Australia, is known for its medicinal properties. The

130. ## Chemistry

I need the structural formulas for the organic compound trans 3,4,5-triethyl-2-octyene

131. ## chemistry

40grams of sodium hydroxide was reacted with sulphuric acid to give 35grams sodium sulphate.calculate the percentage yield of sodium sulphate.

132. ## science

Q.4. Calculate the binding energy per nucleon of 20 Ca40 which has atomic mass of 39.975 a.m.u The mass of hydrogen atom is 1.0078 a.m.u and that of neutron is 1.0086 a.m.u (1 a.m.u = 931 Mev) (10)

133. ## english homework

Hello! I have to write a dialogue with 3 characters, the subject is "hello doctor!" I probably make a doctor with a patient and the patient's mother, my idea consists of simulating (a lot of )illnesses in order to not to go to school (it's about the little

134. ## Math

Prove that if sin doesn't equal 0, then 1+cot^2=csc^2. HELP!!!!!!!!!!!!

135. ## physics ( help)

Hypothetically, if you were standing on the balcony of an apartment on the 10th level of building and you throw a ball at 30° above the horizontal away from the building at 4.5m/s, how far from the building would the ball land?. The height from which the

136. ## Probabilility/Statistics

You have $5000 to invest. Two options: (1) 67% chance of making a return of$1000 or getting nothing. (2) 50% chance of making $300 and 50% mking$700?

137. ## GEOL12 (urgent)

i have one simple question i need answering. Is the internal structure of a Composite, Cinder Cone, and Shield volcano are the same? please help and thank you

138. ## Physics

a 800 gram ball at the end of a cord is whirled in an almost horizontal circle of radius 1.50 meters. its tangential speed in the circle is 10 meters per second. What must be the tension in the cord? What angle does the cord make with the horizontal?

The engine of a train has a mass of 5x10^4 kg. it can accelerate six railway cars having a total mass of 3x10^5 kg by 0.4 m/s^2 (the 6 railway cars have a combined mass of 3x10^5). what acceleration can the same engine using the same force give to four

asked by Jess J
140. ## algebra

Solve the following system of equations: x + 2y - z = 2 -3x + y + z = -9 x + y - 2z = 5 I came up with (-2,-11/3, -2) Is this correct?

141. ## Math

15/40 - ?=1/5 my is 7/40 15/40-7/40=8/40=1/5

142. ## algebra

The following scores were recorded on a 100-point examination: 95, 75, 76, 86, 96, 71, 68, 81, 95, 76, 69, 82, 93, 88, 94 Find the mean and median final examination scores.

143. ## math

how many cups of butter is needed for 36 brownies?...if 2/3 cups is need for 16 brownies

144. ## U.S History

what was the leading cause of death in the civil war? what role did science and tenchnolgy play in the high deat tolls of this war?

144/k=9 I don't understand how to do this using reciprocals, how my teacher wants me to solve the problem. Note: The fraction bar is in my paper, so it's 144 being the numerator, k being the denominator, and then =9 if that makes any sense.

146. ## CHEMISTRY

ETHANOL (C2H5OH) HAS A DENSITY OF 0.80g/ml. IF A 10%(v/v) MIXTURE OF ETHANOL IN WATER WAS PREPARED HOW MANY GRAMS OF ETHANOL WOULD BE IN 100ML OF THE MIXTURE? (ASSUMING MIXED VOLUME IS THE SUM OF THE PARTIAL VOLUME)

147. ## physics

Does the minimum height of a mirror required so that a man can see himself completely depend on his distance from the mirror?

148. ## Algebra

(12x + 5t)-(14t-6x) 12x + 5t - 14t -6x ( I get lost here when the -6x changes to +6. Same as this question: (5x + 2z)-(2x - 11z) Can anyone explain this to me? Thank you

149. ## Chem

How many grams of O2 are required to burn13.0g of acetylene? The answer I got is 40gO2 is this right.

150. ## Accounting

What is the equation for a simple interest rate of 47,000 note at 12 percent in 3 years? Please help resolve.

151. ## physics

2. a body of mass 20kg is released from rest t the top of a rough slope which is inclined at 30 degrees to the horizontal.six seconds later the body has a velocity of 21 m.s down the slope. find the resistance to motion in newtons experienced by the body?

152. ## math-functions

If y = x^2 + 5x - 9,for what values of x is y>5?

153. ## physics

What is the net force on a rock that weighs 500N if the weight of the water it displaces is 300N?

154. ## algebra 2 and trig (math)

Find the positive acute angle that satisfies the equation tan(squared) minus tan = 0.

155. ## trigonametry

cos6x+2cos^x=1

156. ## geology (very urgent)

i have an assignment that i have to email back my friend on identifying minerals. simple enough the trouble is how do i write this assignment in "EMAIL FORM" could you helped me please very please...i already finished my assignment now i just have to turn

157. ## Physics

An object is executing circular orbits of radius 0.5 m. If it completes an orbit every 3 seconds, what is its tangential speed?

158. ## statistics

Suppose a random sample of 36 is selected from a population with a standard deviation of 12. If the sample mean is 98, the 99% confidence interval to estimate the population mean is

159. ## Math

Could someone work this question out so I understand it. Find the indefinite intregral (lnx)^7 / x dx Use C as the arbitrary constant.

160. ## Physics

a 800 gram ball at the end of a cord is whirled in an almost horizontal circle of radius 1.50 meters. its tangential speed in the circle is 10 meters per second. What must be the tension in the cord? What angle does the cord make with the horizontal?

161. ## math

The following scores were recorded on a 100-point examination: 95, 75, 76, 86, 96, 71, 68, 81, 95, 76, 69, 82, 93, 88, 94 Find the mean and median final examination scores.

162. ## Physics

a 1.75kg pistol lies at rest on an essentially frictionless bench. it accidentally fires and shoots a 25 gram bullet parallel to the bench. How far has the bullet moved by the time the gun has recoiled 2.60mm?

163. ## Finance

Using Monte Carlo simulation, calculate the price of a 1-year European option to give up 100 ounces of silver in exchange for 1 ounce of gold. The current prices of gold and silver are $380 and$4, respectively; the risk-free interest rate is 10% per

164. ## Math

Suppose there are 500 pennies in a row... (math problem)? The pennies are all "heads up" Now suppose that 500 people line up and ... Person #1 turns over all the pennies Person #2 turns over every 2nd penny, starting with penny number 2 Person #3 turns

165. ## math

Right triangle ABC is similar to triangle XYZ. If XY = 35 cm, YZ = 70 cm, and AB = 5 cm, then what is the length of line segment BC?

166. ## economic

supposes that a borrower and a lender agree on the nominal interest rate to be paid on a loan. Then inflation turns out to be higher than they both expected.

167. ## economic

supposes that a borrower and a lender agree on the nominal interest rate to be paid on a loan. Then inflation turns out to be higher than they both expectedInflation during the 1970s was much higher than most people had expected when the decade began.How

168. ## trig

given a central angle of 66 degrees find the area of a sector in a circle of radius 12.1 inches

169. ## Calc

Find the integral from 1 to 0 of arcsin(x)dx Thank you!

170. ## Speechwriting

Hi. How can I start a speech without saying goodmorning ladies and gentlemen? But not sound rude...

171. ## Calculus

find the volume OUTSIDE the cylinder x^2+y^2=9 and INSIDE the sphere x^2+y^2+z^2=25

172. ## chem

Can you Identify the correct equilibrium constant, Keg, expression 2H2(g)+02(g)2H20(l)? a)Keg=1/(2(H2)(02)) b)Keg=(H20)2/((H2)2(02)) c)Keg=1/(H2)2(02)) d)Keg=(H2)2(02)

173. ## statistics

Practice Problem #16 pg. 307: A researcher theorized that people can hear better when they have just eaten a large meal. Six individuals were randomly assigned to eat either a large meal or a small meal. After eating the meal, their hearing was tested. The

174. ## College math/bus calc

A rectangular-shaped garden has one side along the side of a house. the other three sides are to be enclosed with 60ft of fencing. what is the largest possible area of such a garden?

175. ## math

A florist uses wire frames to support flower arrangements displayed at weddings. Each frame is constructed from a wire length 9ft long that is cut into six pieces. the vertical edges of the frame consist of four of the pieces of wire that are each 12

176. ## chemistry

Neutralization Reaction Molarity Calculations: For example: What is the molarity of a Ca(OH)2 solution if .032 L of the solution is exactly neutralized by .015 of a 0.56 M HCl? How do I solve- I am unsure where to begin.

What is PPP?

178. ## calc

If f(x)= (3x)^(3x), then f'(x) = ? Thank you!

179. ## chemistry

what are the oxidatoin numbers in this chemical reaction Ni+H2SO4=H2+NiSO4? is it Reactants: Ni=0 H=1 SO4=-2? Products:H=1 Ni=2+ SO4=-2? what is being oxidized? reduced? what is the oxidizing agent? reducing agent? is Ni being oxidized and is reducing

180. ## Chem Webwork

Complete the table below: What are the pH values if you take into account that the 8.00 mL of 0.10 M Acid was first diluted with 100 mL of water (like it will be in the experiment you perform in lab)? mL NaOH: 0.70 pH w/ HCl: 2.14 pH w/ HC2H3O2: ??? I got

181. ## Maths and Physics

A particle P of mass m=1 moves on the x-axis under the force field F=36/(x^3) - 9/(x^2) (x>0). Show that each motion of P consists of either (i) a periodic oscillation between two extreme points, or (ii) an unbounded motion with one extreme point,

182. ## elementary statistics

compute the variable of the random varible X

183. ## math

how to figure out ? % of 25=20 and 25% of ? = 7

184. ## English - Native speakers

Can you please correct these sentences(concerning grammar) We should reduce a politician salary. I hate to eat sweets because it is not good for my teeth. I am going to ban her computer games. I work only a few hours for a month. My salary is going to

185. ## Physics

a 1.75kg pistol lies at rest on an essentially frictionless bench. it accidentally fires and shoots a 25 gram bullet parallel to the bench. How far has the bullet moved by the time the gun has recoiled 2.60mm?

186. ## math

how would you solve a problem where someone drinks 4 to 7 sodas per week. What is a reasonable number of sodas they will drink in 8 weeks?

187. ## Physics

You have a tiny slip of paper and a large rectangular wooden block. If you put both of them side-by-side and drop the two to the floor from the same height, the block gets to the floor first. Can you think of (and describe) three “simple” ways (using

188. ## science

what is the equation for iron plus sulphur ?

189. ## algebra

y = -x2 - 4x + 4

190. ## English Writing

i have an assignment that i have to email back my friend on identifying minerals. the trouble is how do i write this assignment in "EMAIL FORM" could you helped me please very please...i already finished my assignment now i just have to turn the write up

191. ## scientist

how can u help me with terrestrial and aquATIC BIOMES

192. ## math

In a drawing for a DVD player, there are 100 tickets in a box. Five of the cards are marked with a star and the rest are marked with an X. To win, Carmen must draw two cards, without replacement, both of which are marked with a star. What is the

193. ## Science / math

I have data on ATPase activity of two types of muscle at different concentrations of Ca 2+ and although the leg muscle seems to be more responsive than the flight i have to prove this statistically I don't know whether my data is paired or not. I think

194. ## Math

X+4+2x+4+x+4+5x-2=64

195. ## Job Posting help..

Hey Could I please know some cons and pros about working at Coopers(A grocery store)?

196. ## chem

@ 46degress C a 1L sample of ammonia gas has a prssure of 5.3 atm. what is the pressure in atm on the sample when the volume is reduced to 100ml with no temp change?

197. ## chem

If 25ml of bromine, a liquid element at room temp is added to 100ml of water, what would be the resulting molar concentration of bromine?

198. ## goverment

Explain how the relationship between the American colonists and Great Britain affected the development of the underlying principles and ideas in the Declaration of Independence and in new state constitutions

199. ## Physics

'N' small drop of same size are charge to 'V' volt each if they combine to form single large drop then what will be the realation between Qq,Vv,Rr?

asked by Prajna parimita das
200. ## Math

if two polygons are congruent, then they are similar. What is the contrapositve of this statement?

201. ## English Comp.

Define "integrated quotation"

202. ## English

Hello. Please check the structures: He and his wife didn't have bank accounts. He or his wife didn't have... Both he and his wife didn't have... Neither he nor his wife had ... THANK YOU FOR HELP.

203. ## Social Studies(child Labor)

i was seeing the poltical cartoon with the child labor exploiter and i need help interpet

204. ## keyboarding and word process

in a buisness report, what spacing should you use between lines?

205. ## Job Posting

What would be some pros and cons about working at Purdy's chocolates?(chocolate store)? One thing I know is that you have to be chocolate knowledable for this job. Other than that, what are some pros and cons?

206. ## Physics

At a particular instant, a charged particle (+q) moves toward south at speed v in a uniform magnetic field that is directed toward you. The magnetic force that acts on it is

207. ## Geometry

Find the measure of each angle (x + 1) (4x - 56)

208. ## social studies

hi i was wondering how long does it take to travel from venice to acre by ship like marco polo did??

209. ## chemistry

how many grams of aluminum are in 25.0 ml of a 14%(w/v) solution of Al2O3?

210. ## Statistics

TRUE OR FALSE: For a set of data with mean 6 and variance 16, approximately 68% of the values will fall between -2 to 14.

211. ## Chemistry

What do you think cause H2O2 to decompose rapidly

212. ## Math

I am stuck on this question. Could someone work it out. Id appreciate it. Find the amount of A in an account after t years given the following conditions. dA/dt = 0.04A A(0) = 7000 A(t) =

213. ## calculus

d^2/dx^2(q(x))-5*(d/dx(q(x)))+6*q(x)=0

214. ## gr10 science

How could I write a general statement about how a chemical reaction might affect the total mass of reactants and products?

215. ## Science

I would recommend to check out a website called physmatixsolve They helped me with a tough question i got in my Physics homework, classical mechanics. The amazing thing is that they really sent me the solution in less than 24 hours, which is pretty neat.

216. ## Economics

Hey! I'm doing an assignment in which I need to research a company (Qantas)and its performance on the ASX (Australian Securities Exchange). I know that some sources of information will be the Qantas website and the ASX website but are there any other

217. ## Physics

what is the correct equation to use to find the velocity of the center of mass of a cylinder after it rolls down a hill

218. ## Algebra

Use Gauss-Jordan to solve 3x + 2y = -4 4x – 2y = -10

219. ## physical science

6. Draw a model of the atom shown in the atomic box below. Be sure to place all the protons, and neutrons in the correct location.

220. ## English

You corrected this sentence: Don't talk about me as ancient: Don't talk about me as if I'm ancient. Can you explain me the difference between "ancient" and "old"? Ancient, I believe, is no longer used or does it have a negative connotation? If you want to

221. ## Chemistry

I need the name of the following compounds using the IUPAC method: O CH2CH3 O || | // / \/ \/ \ OH

222. ## Phys-Help!

Help please: You are looking north into a N/S coil that you observe to be carrying a clockwise current. A nuclear decay particle emitted due East within the coil (at the center) is instantaneously deflected verically upward. The decay particle is an: alpha

223. ## Calc

What is the volume of the solid generated by rotating about the y-axis the region enclosed by y=sinx and the x-axis, from x=0 to x=π? Thank you for your help!!

224. ## san bernardino valley college

A rectangular rm. containing 192 sq.ft longer than it is wide. How long of a piece of crown molding is need to trim the bper. os the ceiling.?

225. ## Earth Science

My experiment was to measure the float of a tongue depressor down a river. The mins it took the tongue depressor to float from point A to B and the depth of the river on those days. The meter represnt how depth/wide that point of the river was on that day.

226. ## vocab

Directions: Use the underlined etymology clues to help you choose the correct word that is missing from each of the following sentences. 3. The [underlined](Middle English, from Old French boc, "male goat")[/underlined] had a physically demanding job. A.

227. ## social studies

what is the trade route from portugal to india known as

228. ## psychology

Susan Sharp is a 35year old lady who has recently been diagnosed with diabetes.She is overweight and smokes.She is aware that she does not have a healthy lifestyle but finds it hard to resist fast foods and alcohol.She is a single parent of two young

229. ## math

63 divided by -7 is what?

230. ## math

Perdict how many times the cube will land on the letter c if u toss the cube 30times ?

231. ## PHYS

Help! Initially there are 6x10^9 radioactive of element W (decay constant 0.173/day) in a sample. As a nucleus of W decays, it converts 2.67x10^-28 kg of its mass to energy and releases the energy. How much time (in days) is required for the sample to

232. ## physics

Consider a triangular pulse having a wave function (1)0()(1)00xNforbxbxxNforxbbforelsewhere a) Find N using the normalization condition. b) Find the expectation value of the position and the momentum.

233. ## biology

in mushrooms,the basisia are found on the

234. ## math

Not sure how to go about this? If I multiply x by .95, I've decreased it by _______%

235. ## bowie

answer to 5(2x-3) 8=9 in a fraction

236. ## History

how trading helped sparta economy?

237. ## geology (urgent)

i have one simple question i need answering. Is the internal structure of a Composite, Cinder Cone, and Shield volcano are the same? please help and thank you

238. ## math

1.)Name the property that is illustrated. a) 7 „e 6 ƒ­ 6 „e 7 b) 7 ƒy (1 ƒy 9) ƒ­ (7 ƒyƒn1) ƒy 9 2.) a) Identify the base in the following statement b) Solve for the amount. What is 81% of 285? 3.)a) Find the supplement of „£A. b) Find the

239. ## math

of the 900 students 585 went to college what percent is that? a)150% b)65% c)90% d)58.5%

240. ## Physics

Let's say I put a very hot 100o C, 41 g cube of aluminum in 71 ml water at room temperature (20o C). What is the temperature of the water after equilibrium occurs

241. ## Physics

A woman is standing on the middle of a ladder that leans up against a building, with an angle of 56 degrees from the ground. The wall is very slippery and the ladder is very light. What is the minimum coefficient of friction needed between the ground and

242. ## Algebra 2

i need help, step by step, in solving for fractional coefficients. can someone walk me through?

243. ## English - Native speakers

Is it correct to say Is he at work now or Is he now at work?

244. ## math

to make 16 browns you need: 1 cup butter 6ounces of chocolate 2 cups of sugar 2 1/2 teaspoon vanilla 4 eggs 1/2 cup of flour so how much butter, chocolate, sugar,vanilla, eggs and flour is need to make 24 browns?

245. ## 1950's Food

For english im in a group that is doing a presentation on 1950 food. Were going to be making rice crispy treats and bringing them in since that was a popular dessert during the time. but we want to make it.. for lack of a better word, interesting. so does

246. ## chem

What is the vol in L of 2 moles of molecular oxygen (O2) at STP?

247. ## american history

what did the fugitive slave acts specify?

248. ## math

Add and simplify. 3/4+1/10+7/15

249. ## English

Hello. Please help me with grammar. 1)Which is better, one or a: "more than one third of Italy's population" or "more than a third of Italy's population"? 2)Are the phrases correct (meaning "the Italian population"): a third of the (?)Italian people; a

250. ## Physics

'N' small drop of same size are charge to 'V' volt each if they combine to form single large drop then what will be the realation between Qq,Vv,Rr?

asked by Prajna parimita das
251. ## Physics

'N' small drop of same size are charge to 'V' volt each if they combine to form single large drop then what will be the realation between Qq,Vv,Rr?

asked by Prajna parimita das

i need some child labor political cartoons

253. ## science

how does a friction help us to stay upright on an icy morning

254. ## chem

which is a stronger acid HCL or HC2H3O2?

255. ## Algebra

find the length of a rectangle of 14.8 square inches if the width is 7 inches

256. ## probability

a bag of 100 marbles contains 0 blue, 25 green, 25 mixed,and 20 clear. what is the probality of selecting a blue? ablue and green? a marble that is not clear? ablue on the first draw and a clearon the second draw? a

257. ## social studies

marco polo traved from venice to china i need the aproxmately dates to each place he travelved frm venice to china i need the place and date please someone help

258. ## american history

before departing for what would be of plymuth colony, the sroby separtists first lived for a time in

259. ## chemistry

if atoms give off light, why don't they glow?

260. ## Goverment

Who runs the national goverment?

261. ## Physics

You are driving your race car around a circular test track. Which would have a greater effect on the magnitude of your acceleration, doubling your speed or moving to a track with half the radius? Why?

262. ## geology (urgent)

when was Mauna Loa last eruption? please help and thanky you

263. ## Pre-Algebra

What is a-3/5=1/5 ?

264. ## chemistry

A ^232Th source is rated at 42 curies. How many thorium atoms disintegrate in 10 minutes?

265. ## american history

under the system,spanish conquistadores were rewarded with local villages and control over the local labor force

266. ## Social Studies(child Labor)

i found this poltical cartoon why is this fat man eating kids i think because the fat man is just taking the kids rights and the fat man is making them work is this correct???

I have data on ATPase activity of two types of muscle at different concentrations of Ca 2+ and although the leg muscle seems to be more responsive than the flight i have to prove this statistically I don't know whether my data is paired or not. I think

268. ## math

2m shorter than twice side b and side c 3m longer than side b find the length of each side

269. ## pre-cal

what is the vertex and directrix of the parabola y=-1/2x^2 + 10 - 46

270. ## english

How does a motif help portray the theme of a story?

271. ## social studies

how long does it take from acre to tabriz by ship?? like marco polo??

272. ## Science

A400watt light bulb is left on for 6.5hours. How many kilowatt hour of energy is used?

273. ## Chemistry

A 1.56L sample of Neon gas at STP is heated to 100C, what is the final pressure assuming the volume stays the same?

274. ## Chemistry

What do you think cause H2O2 to decompose rapidly

275. ## nalya sec sch

do people accomplish more to do things in thiere own way

276. ## Statistics

Simple regression Set up a general model and what assumptions are there?

277. ## Chemistry

What is the Delta H value for water that is evaporation in Joules?

278. ## Chemistry

Functional groups 1. are the repeating unit of polymers. 2. are groups of atoms whose chemical prop- erties are pretty much independent of their chemical environment. 3. perform specific biological functions using molecular recognition. 4. are a fictitious

279. ## math

Gillen has 30 vehicles, some are bicylces and some are cars. These vehicles have a total of 88 wheels. How many bicycles would there be?

280. ## Computer Science

Cell formulas are usually displayed in the cell, while the contents are displayed in the name box T or F ??

281. ## math

Find the five-number summary of the following set of numbers. 341, 233, 181, 368, 247, 551, 286, 223, 313

asked by math illerate
282. ## gr10 science

The products of the reaction are iron (III) hydroxide and sodium chloride. How could I write a word equation for this reaction?

283. ## math

Automobiles and small trucks account for 84% of the travel to and from work in the United States. What fraction represents all other means of travel to and from work in the United States?

asked by math illerate
284. ## social studies

want to find some essays or articlrs pertaining to the problems that developed due to the weakness of the Article of the Confederation

285. ## world geography 1A SAISD

which of the following is an example of cultaral assimiltion?

286. ## Social Studies

The term used in ancient China to describe the authority to rule coming from god is the _____of________?

287. ## guided practice

can the lenghths 12 cm, 13 cm, and 18 cm make a right triangle ? justify your answer

288. ## math

how do you solve 5k-3=negative13

289. ## Pharmacology

What type of name is Nyquil? A. Generic B. Official C. Trade D. Chemical

290. ## Pharmacology

What type of name is Nyquil? A. Generic B. Official C. Trade D. Chemical

291. ## chemistry

Nickel2 sulfate is produced when elemental nickel metal is dissolved in sulfuric acid to make nickel2 sulfate. Hydrogen gas is also released in the process. what is the balanced equation for this chemical reaction?

292. ## physics

what are the two forces that affect the motion of a child as she comes down a slide?

293. ## math

First find the general derivative of f (x) = {√(x−1)} . Then find the equation of the tangent line to the graph at x = 10.

294. ## social science

a sociological theory concerned with the issues of who benefits from particularcsocial arrangements and how the powerful maintain their positions is known as:

Hey! Is it illegal under copyright law to record sections of a video so that you can use the quotes in an assignment about the video but then delete the sections after you've used them?

296. ## math

4(x) + pi(x)=60 how do i solve this?

297. ## History

How have views on Chamberlain changed over time?

298. ## Math

To travel to Mrs. Shutt's parents house,she traveled 320 miles in 5.5 hours. What is average speed?

299. ## math

HI I need help with mixed numbers! I used to know how to do them. but now I fogot!I was in sping break so yeah.please help what should i do!

300. ## Law

looking to ascertain what the liquid volume of 5 gallons of acetic anhydride is in pounds.

302. ## calc

If a particle moves in the xy-plane so that at time t>0 its position vector is (e^(t²), e^(-t³)), then its velocity vector at time t=3 is...? Thanks so much!

303. ## Language Arts

Relation between the words read and watch

304. ## math

at the end of five days i saved 30$. if each day i saved 2$ mre then the day before, how much money did i save?

305. ## English

Please help me to jumble this word: UIDNVSEH and it should b a loving word.