# Questions Asked onMarch 10, 2015

1. ## Physics

Billy stands on a hill without slipping. In which direction is the force of friction acting?

2. ## math

Anais bought 4 1/2 yards of ribbon. She had 3 feet 8 inches of ribbon left after trimming some curtains. How many inches of ribbon did Anais use to trim the curtains? Anais used _____ inches of ribbon.

3. ## physics

4. A ball is thrown so that it just clears a 3m fence 18m away. If it left the hand 1.5m above the ground and at an angle of 60° with the horizontal, what was the initial velocity of the ball?

Which of the following has a graph that is wider than the graph of y=3x^2+2? A) y=3x^2+3 B) y=0.5x^2+1 C) y=-4x^2-1 D) y=4x^2+1 Would the answer be B?

5. ## Calculus

For which pair of functions f(x) and g(x) below will the lim f(x)/g(x)equal 0 x-infinity f(x) e^x; g(x) = x^3 f(x) x^5; g(x) = e^x f(x) x^3; g(x) = ln(x) f(x) x^negative 2; g(x) = e^negative x

6. ## Math

18 students in a class play baseball. 17 students in the class play basketball. 30 students in the class play either or both sports. Select the vend diagram that shows the number of students who play basketball and baseball. A. Baseball 13 (5) 12

7. ## algebra

Jason is designing a rectangular garden that has area of 300 square feet. The width of the garden is five feet less than its length. Find its length and width

8. ## Civics

8. Which one of the following provisions was part of the first draft of the Articles of Confederation submitted to the Second Continental Congress? A. Appointment of George Washington as commander of the Continental Army B. Limited and restricted functions

9. ## statistics

Determine whether the description corresponds to an observational study or an experiment. Research is conducted to determine if there is a relation between kidney function in adults and childhood-onset diabetes.

10. ## Civics

11. The purpose of the petition sent to King George III by the First Continental Congress was to A. request a place in Parliament for colonial delegates. B. request that the king consider granting independence to the established colonies. C. declare the

11. ## physics

A plastic rod is rubbed against a wool shirt, thereby acquiring a charge of −4.9 µC. How many electrons are transferred from the wool shirt to the plastic rod? The elemental charge is 1.6 × 10−19 C.

12. ## language arts

Be still, sad heart! and cease repining; Behind the clouds is the sun still shinning; thy fate is the common fate of all, into each life some rain must fall some days must be dark and dreary 1. from the context, what do you conclude is the probable meaning

13. ## Statistics

In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the requested probabilities. More than a decade ago, high levels of lead in the blood put 87% of children

14. ## physics

a ball dropped from rest at a height of 50 m above the ground. (a) what is the speed just before it hits the ground? (b) how long does it take to reach the ground?

15. ## Chemistry

1)A buffer solution that is 0.10 M sodium acetate and 0.20 M acetic acid is prepared. Calculate the initial pH of this solution. The Ka for CH3COOH is 1.8 x 10-5 M. As usual, report pH to 2 decimal places. *A buffered solution resists a change in pH.*

16. ## Art

How do landscape paintings convey the value and ideas of Chinese culture? 1.Landscape paintings show chaotic, and unhappy culture 2.Landscape Paintings reveal the importance of natural history to the Chinese 3.Landscape paintings show that Chinese desire

17. ## math

A 13 feet ladder is leaning against a house. The distance from the bottom of the ladder to the house is 7 feet less than the distance from the top of the ladder to the ground. Find the distance between the bottom of the ladder and the house.

18. ## Spanish

Need some help with my spanish assignment Complete the following sentences with the correct form of either dar or decir. My answers are in parentheses. I am having trouble, any input is appreciated! 1) Mis amigos (decimos) que hay una fiesta en casa de

19. ## Chemistry

A student mixes 5.0 mL of 0.00200 M Fe(NO3)3 with 5.0 mL 0.00200 KSCN. She finds that the concentration of FeSCN2+ in the equilibrium mixture is 0.000125 M. Follow these steps to determine the corresponding experimental value of Kc for the reaction of Fe3+

20. ## Chem

In photography, unexposed silver bromide is removed from film by soaking the film in a solution of sodium thiosulfate, Na2S2O3. Silver ion forms a soluble complex with thiosulfate ion, S2O3^2-, that has the formula Ag(S2O3)2^3-, and formation of the

21. ## Calculus

An observer is 23m above the ground floor of a large hotel atrium looking at a glass-enclosed elevator shaft that is 15m horizontally from the observer. The angle of elevation of the elevator is the angle of the observer's line of sight makes with the

22. ## math

A rectangular piece of carpet is place on the floor of a rectangular room leaving a margin of 1 m around it. If the room measures 8 m by 6 m find the area of the room not covered by the carpet.

23. ## Statistics

A history class is comprised of 5 female and 8 male students. If the instructor of the class randomly chooses 8 students from the class for an oral exam, what is the probability that 2 female students and 6 male students will be selected? Round your answer

24. ## ART

how does a landscape artists make an object in the foreground appear closer than an object in the background? a~by making the object in the foreground larger in comparison the background objects. b~by making the object in the foreground less detailed in

25. ## statistics

A jar contains 3 nickels and 2 dimes. You reach in and randomly select 2 coins. Let x represent the value of the two coins in cents. Find the expected value and standard deviation of x

26. ## Math

Chris ate 1/8 of a banana cream pie with a 14 inch diameter. What is the area of the remaining portion of the pie?

27. ## Foreign Language, French

Can you please proofread my answers to the questions assigned by my teacher and correct me where needed? 1. découvrir / vieille / qu'est-ce qu' / dans / ils / valise / la Qu'-est-ce qu' ils veieille ont découvert la valise? 2. cette / nous / restaurant /

Can someone please be kind enough to check my answers? Thanks! :) I put stars by my answers. 1. Calculate the slant height for the given cone. Round to the nearest tenth. Diameter= 8cm Height= 9cm a. 10.2 cm b. 11.4 cm c. 9.8 cm *** d. 12.0 cm 2. Calculate

29. ## Geometry

A red cross helicopter takes off and flies 75km at 20degree south of west. There it's drops off some relief supplies. It then flies 125 km at 10 degree west of north to pick up three medics. A. Make an accurate drawing of the two vectors decribed? B. draw

30. ## Pre-Calculus

Water is spraying from a nozzle in a fountain forming a parabolic path. The nozzle is 10 cm above the service of the water. The water achieves a max height of 100 cm above the waters surface and lands in the pool. The water spray is again 10 cm above the

31. ## chemistry

Iron is obtained commercially by the reaction of hematite (Fe2O3) with carbon monoxide. How many grams of iron is produced when 35.0 moles of hematite react with 41.5 moles of carbon monoxide? Fe2O3(s) + 3 CO(g) 2 Fe(s) + 3 CO2(g)

32. ## health

The breathing process is controlled by (Select all that apply) A. The diaphragm B. The pharynx C. Blood vessels D. rib muscles

33. ## chemistry

Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.150 M HClO(aq) with 0.150 M KOH(aq). The ionization constant for HClO is 4.0x10^-8. pH before the addition of any KOH? pH after the addition of 25 mL of KOH? Please show the

34. ## math

Jose wants to find how many gallons of water he needs to fill his cube-shaped aquarium. One side of his aquarium is 4 feet long. a)Write and solve an expression to find the volume of Jose's aquarium. b)One cubic foot is equal to 7.48 gallons of water. How

35. ## World History

Regarding Indonesia, which of the following statements is false? A. Indonesia was formerly the British East Indies. B. The first head of Indonesia was Sukarno. C. The first leader of Indonesia was Suharto. D. Indonesia was formerly the Netherlands East

36. ## science

1.40g each of CO, H2O, and H2 are sealed in a 1.41−L vessel and brought to equilibrium at 600 K. CO(g)+H2O(g)⇌CO2(g)+H2(g)KC=23.2 How many grams of CO2 will be present in the equilibrium mixture?

37. ## Algebra

The radiator in a car is filled with a solution of 75 per cent antifreeze and 25 per cent water. The manufacturer of the antifreeze suggests that for summer driving, optimal cooling of the engine is obtained with only 50 per cent antifreeze. If the

38. ## Arithmetic Progressions

The second term of an arithmetic progression I four times the fits term, and the first term is ten. Find the common difference and hence find the sum of the first 12 terms.

39. ## physics

*please walk me through equation The patellar tendon attaches to the tibia at the tibial tuberosity. The tibial tuberosity is 7 cm from the center of the knee joint. The patellar tendon pulls at an angle of 35deg to the line passing through the tibial

Make a box and whisker plot of the data. 13,13,20,21,21,22,24,27. I know the median is 21. The 3Q is 23 Min is 4 and the max is 27. But I can't figure what number is the Q1 because I don't know what number comes between 13 and 20. Is it 15 or 16.5? Please

41. ## Finance

As an investor, you are considering an investment in the bonds of the Conifer Coal Company. The bonds, which pay interest semiannually, will mature in 8 years, have a coupon rate of 9.5% on a face value of \$1,000. Currently, the bonds are selling for \$872.

42. ## Pre-Calculus(Trignometry)

There are 3 airports, A , E and G. G is 200km from A.E is 160 km from A From G the bearing of A is 052 degrees. From A the bearing of E is 216 degrees. What's the distance between A and G? 360- 216 = 144 144-52 = 128 144-128 = 16 a^2 =

43. ## Civics

Which one of the following statements is most accurate regarding the Mayflower Compact? A. It made Plymouth a royal colony. B. It created the Massachusetts Bay Colony. C. It founded the Plymouth colony under a proprietary governor. D. It gave the Pilgrims

44. ## Civics

17. After General Howe's forces defeated the Americans at Brooklyn Heights and White Plains, Washington's strategy called for A. drawing British forces inland. B. retreating to the south. C. surrounding the British and forcing them into one location. D.

1. Given t1/2 to be 0.0137 seconds, how long should it take to reach 87.5% of maximum charge? 2. Let's say you measure t1/2 to be 0.0137 seconds and the resistance in the circuit is 99 Ohms. Then what is the capacitance in micro Farads? 3.q = qmax(1 - e -t

1. Which of the following correctly describes a radio wave? A. long wavelength and high frequency B. long wavelength and low frequency C. short wavelengh and low frequency D. short wavelengh and high frequency Is the answer B? 2. When the energy of a light

47. ## Elementary Statistics

"Scores on the Wechsler IQ test approximate a normal curve with a mean of 100 and a standard deviation of 15. b. What percentage of IQ scores are below 74?" I've been working at this for a while now, but when I solve for the z-score, I keep getting a

48. ## Physics

The coefficient of static friction between the m = 3.75-kg crate and the 35.0° incline of the figure below is 0.320. What minimum force vector F must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

49. ## stats

A pizza can be made with any of the following toppings: cheese, pepperoni, sausage, mushrooms, anchovies, green peppers, or olives. How many different three-topping pizzas can be made? Doubling of any topping is not allowed.

1. Which movie professional creates the storyboard? A. Screenwriter B. Production designer C. Director D. Graphic artist *** 2. How might a cinematographer create a believable scene in natures? A. Through research of plants and animals B. Through

51. ## entrepeurneurship

when your company pays for a promotional message , this is what type of form advertising public relations word of mouth market research

52. ## Civics

13. Under the reign of Louis XIV, the government in France was a/an A. absolute monarchy. B. representative democracy. C. dictatorship. D. direct democracy. A?

53. ## Math

A surgical technique is performed on 7 patients. There is a 70% chance of success. Find the probability that the surgery is successful for at least 5 patients and what is the expected number of successes out of 20 surgeries. My attempt was: P(xmore than or

54. ## statistics

How to find p value? If test statistic is -0.37, will the p value be 0.3557?

55. ## Physics

1. Given t1/2 to be 0.0137 seconds, how long should it take to reach 87.5% of maximum charge?

56. ## physics

calculate the linear speed of a point on the record at the beginning and the end of the record that rotates at 33rev/min r1=7cm,r2=15cm

57. ## accounting

Savallas Company is highly automated and uses computers to control manufacturing operations. The company uses a job-order costing system and applies manufacturing overhead cost to products on the basis of computer-hours. The following estimates were used

58. ## chemistry

What is the equation for the oxidation of beta carotene using hot concentrated potassium permanganate solution? How many ketone molecules will the product have?

59. ## Science

An elevator lifts 5 passengers 30 meters in 24 seconds. The power is 15,000w. What is the total weight of the elevator and passengers?

60. ## Chemistry Need Help

What is the concentration of Na+ ions if 25.0 mL of 1.50 M NaOH is reacted with 25.0 mL of 1.50 M HCl? I did M*25ML=1.50M*25.0ML M=1.50M*25.0ML/25ML M=1.50 M Na Is it correct?

61. ## Life orientation

What are practicals action that you can take to address human rights violation of xenophobia in your community

62. ## chemistry

if the concentration of all the reactants doubled, what works happen to the rate I know the reaction rate would increase, but in a previous example it asked the question and the answer was that the rate increases by 16 and I can't figure out how much it

63. ## BOB

A sphere of radius 20 cm and mass 1.80 kg starts from rest and rolls without slipping down a 30.0 degree incline...

64. ## ENGLISH

If you _______ to visit your grandmother, you should go now; visiting hours will be ending soon. A. assert B. retort C. contend D. intend

65. ## math

If you have 100 numbers (1 - 100, including 1 and 100) and you choose 2 of them then do the formula x + y + xy (x being the first number and y being the second) and you replace the 2 numbers chosen with that new number, what are the last possible values

66. ## Chemistry

1)A buffer solution that is 0.10 M sodium acetate and 0.20 M acetic acid is prepared. Calculate the initial pH of this solution. The Ka for CH3COOH is 1.8 x 10-5 M. As usual, report pH to 2 decimal places. *A buffered solution resists a change in pH.*

67. ## chemistry

find mass of sulfuric acid obtained in reaction of 20.0g if sulfur trioxide with excess of water

68. ## math

Evaluate (2sinx)(3sinx) (6cosx)(cosx)

69. ## Chemistry

1)A buffer solution that is 0.10 M sodium acetate and 0.20 M acetic acid is prepared. Calculate the initial pH of this solution. The Ka for CH3COOH is 1.8 x 10-5 M. As usual, report pH to 2 decimal places. *A buffered solution resists a change in pH.*

70. ## chemisty

find the oxidation state of a carbon in methane, carbon monoxide, carbon dioxide, CH2O, acetic acid, carbonic acid, methanol, and benzene (C6H6)

71. ## Pre-Calculus

Determine a quadratic function in vertex form given each set of characteristics. * minimum value of -24 and x-intercepts at -21 and -5 I have: (-21,0) and (-5,0) How would I find the x-coordinate of the vertex? (Thank you)

72. ## Civics

16. Which one of these terms is most closely related to an oligarchy? A. Constitutional monarchy B. Junta C. Democracy D. Roi Soleil B?

73. ## S.S

Canada's help in the World War 1 victory helped Canada become... A. A British Colony B. A World Power C. A French Colony D. Involved in the War of 1812 Thank You Soooo much for helping! I Really Appreciate your help! :)

74. ## Romeo and Juliet

Compare Romeo’s behavior before he meets Juliet with his behavior after they declare their love for each other. What do you learn about Romeo from the change in behavior? He didn't really love Rosaline?

75. ## CIVICS

THIS is a key step in the naturalization process a) a trial b) a hearing c) obtain a warrant d) to seek counsel

76. ## S.S

Why do the United States and Canada cooperate on environmental problems? Thank You sooooooo much for your help! I really appreciate it! :)

77. ## MATH

In ΔHIJ, the measure of ∠J=90°, the measure of ∠I=64°, and HI = 5.4 feet. Find the length of JH to the nearest foot.

78. ## Modeling with Linear Systems

The digits of a two-digit number sum to 8. When the digits are reversed, the resulting number is 18 less than the original number. What is the original number?

79. ## physics

You can estimate your distance from a lightning storm by watching for a lightning flash and then counting in one-second intervals using the general rule that you are 1 km away for every 3 s you count. Explain why this rule works. Estimate the distance from

80. ## English (Novel)

In chapter 18 of The True Confessions of Charlotte Doyle, how is the crew beguiled (tricked) into believing Captain Jaggery's testimony over Charlotte's?

81. ## english

There are specific dates, this recount spans a long period of time in the narrator’s life, it is in 1st person point of view, and only significant times in this narrator’s life were chosen to be included. These characteristics make this piece a memoir

82. ## algebra

Assume that the number of defective basketballs produced is related by a linear equation to the total number produced. Suppose that 6 defective balls are produced in a lot of 200, and 15 defective balls are produced in a lot of 300.

83. ## Theology 10 - HELP .... URGENT!!!

what is your greatest talents? how has it helped the community any ideas... or topics i don't know what to write nor do i know how to start this essay

84. ## Calculus

An observer is 36m above the ground floor of a large hotel atrium looking at a glass-enclosed elevator shaft that is 26m horizontally from the observer. The angle of elevation of the elevator is the angle of the observer's line of sight makes with the

85. ## math

Mark has 312 books in his bookcases. He has 11 times as many fiction books as nonfiction books. How many fiction books does Mark have. My answer is Mark have 308 fiction books and 4 nonfiction books.

86. ## Math

Which of the following has a graph that is wider than the graph of y=3x^2+2? A) y=3x^2+3 B) y=0.5x^2+1 C) y=-4x^2-1 D) y=4x^2+1 If anyone could help that would be amazing. Thank you so much!

87. ## Physics

Hello to all the fantastic tutors! I'm stuck on this question, I was wondering if there is a way to solve this. A car horn emits 378Hz sound. If the car moves at 23m/s with its horn blasting, what frequency will a person standing in front of the car hear?

88. ## math

If a boat uses 21 GALLONS OF GAS TO GO 80 MILES, HOW MANY MILES CAN THE boat travel on 105 gallons of gas

89. ## physics

What design aspects of the snowmobile make it particulary useful for travel over ice and snow?

90. ## math

If a boat uses 24 GALLONS OF GAS TO GO 69 MILES, HOW MANY MILES CAN THE boat travel on 96 gallons of gas

91. ## Math

Can you drop your email for my math question?Its on Google classroom and it has a picture that does not copy onto jiskha's homework help

92. ## Physics

Hi guys, I was just wondering if I'm heading in the right direction with this question. Thank you so much in advance for your time!! A loudspeaker emits energy at the rate of 56W , spread in all directions. What is the intensity of sound 18m from the

93. ## Math

for a school assignment, santiago has to give three possibilities for the dimensions of a retangle that has a perimeter of 28 ft and an area greater than 30 ft. what are two other possibilities other than 10ft of base and 4 ft for height

94. ## LA

Which excerpt from the play provides additional support for the correct answer to the previous question? A. Mrs. Frank. [To Anne] You're here, safe. You see? Nothing has happened. B. Anne. I'm a terrible coward. I'm so disappointed in myself. I think I've

95. ## Civics

8. Which one of the following provisions was part of the first draft of the Articles of Confederation submitted to the Second Continental Congress? A. Appointment of George Washington as commander of the Continental Army B. Limited and restricted functions

96. ## Challenge Help

Ok so, my birthday is coming up and im planning my party. The theme is challenger, and I am finding all the most funest challenges. I am only 12 so nothing painful like the salt and ice challenge. I already have the bean boozled challenge, the watermelon

97. ## entrepeurneurship

a group of people or companies with a shared set of characteristics and needs or desires is called what

98. ## differential equation

Write the model ODE and the implied initial values, and then solve the IVP to answer each of the f ollowing: [2*8=16pts] (a) A 3kg mass is attached to a spring whose constant is 6 N/m, and the entire system is submerged in a liquid which imparts a damping

99. ## Literature

I need ideas for a trick that would happen in a trickster tale with a lion and a monkey

100. ## Chemistry

At a deep-sea station 200. m below the surface of the Pacific Ocean, workers live in a highly pressurized environment. How much gas at STP must be compressed on the surface to fill the underwater environment with 2 × 107 L of gas at 22 atm? Assume that

101. ## Geometry

"A cone has the radius of 24 and its volume is 1,920 what is the volume of a similar cone with the radius of 18 Answers A.480 B.810 C.1,080 D.1,440" How do I find the height for the similar cone to get its volume?

102. ## Chemistry

What is the pH of a solution made by mixing equal vlumes of .10 M HC2H3O2, .1 M NaOH, and .05 M HCl?

103. ## Math

what is 30% of 90? How do I solve with out calculator?

104. ## Stats

Four diners have ordered a platter of desserts. The platter holds 8 chocolate chip cookies and 4 slices of chocolate cheesecake. The waiter gives each diner a randomly selected dessert. Let Y = the number of slices of cheesecake left on the platter after

105. ## math

Robert is replacing sod in two square-shaped areas of his backyard. One side of the first area is 7.5 feet. One side of the other area is 5.7 feet. The sod costs 'y' dollars per square foot. A)Write an expression to show how much Robert will spend on sod.

106. ## math

One is 2% of what number?

107. ## Math

Why are shapes that are not closed not a real shape

108. ## SCIENCE

hi. Just saying.. I need an answer quick because this is due tomorrow!!! Ok. So, my question was explain the particle theory of why does black objects gets absorbs by heat faster/better? and why does white objects get cooler faster? Thanks And reply as

109. ## CHemistry

Calculate the pH at the equivalence point for the titration of 0.140 M methylamine (CH3NH2) with 0.140 M HCl. The Kb of methylamine is 5.0× 10–4.

110. ## math

In 2000, about 51% of the 280,000,000 US citizens were women. Their median age was 36.6. About how many of these women were younger than age 36.6?

111. ## ECE 311

a child who acquires a reputation for being a trouble maker? A usually has a high level of self-esteem B can easily overcome it C may experience increasing difficulty in forming friendships D also exhibits a strong degree of reactive aggression

112. ## Math

Q. marx's clothing store is selling a lot of items. On Monday 495 items were sold. On Tuesday 450 items were sold. On Friday 593 items were sold. Marx's misplaced the totals for Wednesday and Thursday, but the average over the five days was 494 items per

114. ## math

write 1.5 billion as a standard numeral

115. ## Math

What is 23 - 4/6 =? Please show all the work.

116. ## Chemistry

how much vinegar produces 0.240 moles of acetic acid?

117. ## Math

Add the following. 2/6 + 3/5 + 2/5 + 4/8 + 4/6 =? Please show all the work.

118. ## health

________ may likely lead to aggressive behavior.

119. ## LA

What is the prepositional phrase in the following sentence? The food and the extra water were kept in the storage cabinet. A. The food B. and extra water C. were kept D. in the storage cabinet My answer is D. Thank you

120. ## Algebra

How do I find the cost of a cell phone plan if I use 400 day-timme minutes. is it the cost times the minutes plus contracts if any or just cost times the minutes. Please help me!

121. ## physics

A car's wheel of radius r=50cm goes through 5000rev in 1min. find the car's average angular velocity,and how far it travels along the ground in 1min. The linear speed v and angular speed w of the point of a rotating body are connected by the equation v=wr.

122. ## Art.

1. what is the role of an artist who creates a painting illustraiting a nations victory in war A. to solve a problem B. to glorify the nation. C. to protest the war D. to raise awareness of the war 2. The face that all Incan architecture shares similar

123. ## English1 Pre-Ap

SO I got this Pretest: Pronoun-Antecedent Agreement packet and it's like 7 pages long front and back and I have no I idea what im doing.

124. ## health

what causes depression?

125. ## Physics

A strong lightning bolt transfers about 21.45 C to Earth. How many electrons are transferred? The elemental charge is 1.602 × 10^−19 C.

126. ## Physics

A charge q1 = 5 µC is at the origin, and a charge q2 = 4 µC is on the x axis at x = 6 m. Find the force on charge q2 . The Colulomb constant is 8.98755 × 10^9 N·m^2/C^2. Answer in units of N.

127. ## math

To needs to cut strip of wrapping paper that are each 9 inches wide.If TV has 2 rolls of wrapping paper that are each 15 feet long,how many 9 inch strips can he cut?

128. ## english

should a person pursue someone who seems not to like them?-with the hope of changing their mind

129. ## Chemistrhy 110

How many grams of Na2CO3 must be dissolved in 3.75 L of aqueous solution to yield a molar concentration of 1.75 molar?

130. ## health

In 2004, which ethnic or racial group was at a lower risk of suicide for people ages 65 or older?

131. ## Life orientation

Show the link between intrapersonal conflict and initiating relationship

132. ## Math

What is 15 - 7 2/5 =?

133. ## Math

Part C Matt deposited \$311.50 into his account on Nov. 1. After he paid several bills from the account, his account balance was –\$5.00. What was the total amount of the bills he paid that resulted in this balance? Explain how you got your answer.

134. ## Physics College

A heat engine operates in a Carnot cycle between 78.0°C and 340°C. It absorbs 22,000 J of energy per cycle from the hot reservoir. The duration of each cycle is 3.00 s. (a) What is the mechanical power output of this engine? (answer in kW) (b) How much

135. ## Physics

We want to find how much charge is on the electrons in a nickel coin. Follow this method. A nickel coin has a mass of about 5.7 g. a. Find the number of atoms in a nickel coin. Each mole (6.02 × 10^23 atoms) has a mass of about 57.9 g. Answer in units of

136. ## Math

A bag of balloons contains 2 red balloons, 10 green balloons, 16 yellow balloons, and 7 orange balloons. What is the probability that a randomly selected balloon would be green or orange?

137. ## Math Word Problems

Roger bought a sandwich with half of his money and a candy bar with one fifth of his money. How much of his money did he spend ? Please show all the work.

138. ## health

During adolescence, girls are ________ as likely as boys to develop depression.

139. ## Math Word Problems

If I have 12 brownies and Sue eats 2/3 of them, how many do I have left? Please show me the work.

140. ## Geography

Which region is named for a major landform? - Is it pacific ?

141. ## ~Art~

what is the main subject of persain landscape art,and what does it communicate about the Persian culture and world view? A~Rivers;they represent life and are central to Persian mythology. B~People;Persian enjoy group gathering and value relationships

142. ## Science

which of the following helps ensure a groups access to resources it needs for survival? My answer is D. Territorial Behavior. Please check if this is right?..

143. ## Physics

Zak, helping his mother rearrange the furniture in their living room, moves a 58.3 kg sofa 7.7 m with a constant force of 25 N. What is the work done by Zak on the sofa? Neglect friction. Answer in units of J. What is the average acceleration of the sofa?

144. ## science past year

1.1. A resitance of 1.5ohm is connected in parallel with a resistance of 3 ohm. This combination is connected in series with a resistance of unknown resistance of value R. The circuit is then connected acress a 10 V supply. Calculate: 1.1.1. The value of

145. ## physical science

Picnickers see a lightning flash and hear the resulting thunder 9.0 s later. If the storm is traveling at a rate of 15 km/h, then how long, in minutes, do the picnickers have before the storm arrives at their location?

146. ## Math

of 50 students surveyed, 22 have a skateboard, and 18 have roller shoes. of those, 6 students have both. how many students have neither a skateboard nor roller shoes?

147. ## Math

tom is scheduling his classes for next quarter. he wants to take three classes, and has the following options: spanish at 9, 10, or 11; music at 9 or 11; math at 10 or 12. list possible schedules he would choose

148. ## health

_______ may likely lead to aggressive behavior.

149. ## spanish Homework

The directions say... Complete the following sentences with the correct preterit form of the logical verb in parentheses. Here I have listen 3 out of the 15 questions. I am not really sure what the directions are asking me to do. Mis padres me ____ (llegar

150. ## Math

Use the figure to answer the following questions. figure for questions 1–3 1. Name a pair of complementary angles. (1 point) angle sign1 and angle sign4 angle sign1 and angle sign2 angle sign3 and angle sign4 angle sign1 and angle sign6 2. If mangle

151. ## Language Arts

Please check my answers to these questions: Which of the following is best defined for drama? story with props, story written be performed by actors, and story with a happy ending. My answer is A. Second question What term describes construction onstage

152. ## Math

Explain how the order of operations determines how you simplify a numeric expression. explain the rules for addition, subtraction, multiplication, division, and the use of grouping symbols.

153. ## math

in 2010, 25 parents participated in the band booster organization at king middle school. participation increased to 40 parents in 2011 and 55 parents in 2012. if the trend continues, about how many parents can be expected to participate in 2013? i think it

154. ## early childhood

A child’s oral vocabulary is closely related to:

155. ## ACCOUNTING FOT MERCHANDISING

CASH REGISTER SCHEMES ARE A FORM OF?

156. ## Chemistry

A solution contains one or more of the following ions: silver, barium, and Copper (II). CY 105 student adds sodium chloride to a small sample of the solution of the unknown and a white precipitate is formed. He/she filters out the precipitate and then add

157. ## ECE

If you ask a young child to give you a red ball and he brings a blue one, the child does NOT possess the word red in his: A. productive vocabulary. B. receptive vocabulary. C. oral vocabulary. D. growing vocabulary

158. ## ECE

A child’s oral vocabulary is closely related to: A. his printing ability and scholarship. B. reading comprehension and ease in learning to read. C. creativity and motivation. D. attention span and

159. ## ECE

Noted early childhood experts worry that preschool reading-skill instruction activities may: A. reduce play time. B. intimidate parents. C. accelerate mental growth. D. lead kindergartners

160. ## math

how many ways can you choose 3 flavors of yogurt out of five flavors of yogurt

161. ## math

In a geometric sequence, the sum to infinity is 1.5 and the sum of the first three terms is 14/9. Determine the sequence.

I have tried for days to figure out how to work this problem. Please help show me how to find the answer. A particular radioactive isotope decays from 210 mg to 182.7 mg in 15 days. Find the half life of the isotope. I can not find any problem that is

163. ## math

A set of data is normally distributed with a mean of 455 and a standard deviation of 25. What percent of the data is in the interval 405–455?

164. ## Chemistry

how to prepare 100.0 ml of 0.2 M solution of sodium hydroxide

165. ## Math

Is this correct 3/4 + 1/2 + 1/2= 1 3/4

166. ## Analytic geometry

find the necessary coordinates of 9x^2-4y^2-18x+8y+41=0

167. ## statistics

Z-test. How to find critical value for one tail test?

168. ## Math

Sam needs to cut a piece of sheet metal into 8 pieces. All the cuts are made in the same direction. It takes him 5 min. to make each cut. How many cuts will Sam make?

169. ## chemistry

Find volume (in ml) of 0.3 M solution of sodium chloride containing exactly 3.0g of sodium chloride.

170. ## Chemistry

How to prepare 250ml of 0.2 M hydrochloric acid from 2.5 M hydrochloric acid.

171. ## statistics

I have tried for days to figure out how to work this problem. Please help show me how to find the answer. A particular radioactive isotope decays from 210 mg to 182.7 mg in 15 days. Find the half life of the isotope.

172. ## Chemistry

What is the pH of a solution prepared by mixing 500mL of 2.0M HCN (Ka= 4.9x10^-10) with 500mL of 1.0 M KOH?

173. ## Math

Is 2/3 of 12 = 8

174. ## Probability

Consider three random variables X, Y, and Z, associated with the same experiment. The random variable X is geometric with parameter p∈(0,1). If X is even, then Y and Z are equal to zero. If X is odd, (Y,Z) is uniformly distributed on the set

175. ## Chemistry

Explain Why some ionic compounds are soluble in water. Explain why non-ionic compounds, such as ethanol or sugar are soluble in water. Explain what a saturated solution.

176. ## math

in 2010, 25 parents participated in the band booster organization at king middle school. participation increased to 40 parents in 2011 and 55 parents in 2012. if the trend continues, about how many parents can be expected to participate in 2013? i think it

177. ## math

of 50 students surveyed, 22 have a skateboard, and 18 have roller shoes. of those, 6 students have both. how many students have neither a skateboard nor roller shoes? i don't know how to solve this one

178. ## Elective mathematics

The first three terms of a GP are k-3,2k-4,4k-3 in that order .find the valve of k and the first 8 terms

179. ## Algebra 2

I need steps on how to complete this please i am so confused and lost. :( Consider the infinite geometric series x e n=1 -4(1/3) n-1. In this image, the lower limit of the summation notation is "n=1". a. Write the first four terms of the series. b. Does

180. ## Chemistry

Find pressure exerted by 2.0g of helium enclosed in a 100.0 ml container at 25 degrees Celsius

181. ## math

Marcus is doing a science experiment in which he measures the rate at which bacteria multiply. Every 15 seconds the bacteria double in number. If there are 10 bacteria now, how many will there be in 2 minutes?

182. ## calculus

If 3x^2 + y^2 = 7 then evaluate the second derivative of y with respect to x when x = 1 and y = 2. Round your answer to 2 decimal places.

183. ## life orientation

Explain clearly,the similarities and difference between funza lushaka and nasfas

184. ## College Algebra

John invested his savings in two investment funds. The \$12,000 that he invested in Fund A returned a 3% profit. The amount that he invested in Fund B returned a 10% profit. How much did he invest in Fund B, if both funds together returned a 6% profit?

185. ## chemistry

Find volume of carbon dioxide occupied by 1.0g of CO2 at 0 degrees Celsius and pressure 25.0 torr.

186. ## physics

A system of 1216 particles, each of which is either an electron or a proton, has a net charge of -5.920×10-17 C. A)How many electrons are in this system (exactly)? B)What is the mass of this system (to three significant digits)?

187. ## Chemistry

Find temperature of 20.0g of nitrogen that occupies volume of 500.0ml at pressure 0.45 bar.

188. ## finite math

After rolling a pair of fair, six-sided dice, what is the probability that the sum of the outcomes is at least 4 but less than 12? (Round your answer to the third decimal place)

189. ## Chemistry

Find the Density of xenon of STP

190. ## Math

Is this correct 1/3 + 2/3 + 2/5 + 3/5 + 1/2 = Is the answer 1/3 + 2/3 = 1 2/5 + 3/5 = 1 + 1/2 = 2 1/2

191. ## trapezoidal method

dy dt = 1 + (t − y)^2, t ∈ [2, 3], y(2) = 1 use a step size of h = 1 and the Trapezoidal method to calculate by hand a numerical value for Y1 (≈ y(t = 3)).

192. ## Pre-Calc.

You want to make an investment in a continuously compounding account over a period of 20 years. What interest rate is required for your investment to double in that time period? Round the logarithm value to the nearest hundredth and the answer to the

193. ## algebra

Solve the system of linear equations by graphing 3x+y=0 2x-y=5 Graph the system What is the solution of the system of equations?

194. ## Chemistry

At a deep-sea station 200. m below the surface of the Pacific Ocean, workers live in a highly pressurized environment. How much gas at STP must be compressed on the surface to fill the underwater environment with 2 × 107 L of gas at 22 atm? Assume that

195. ## Chemistry

a solution of 25 ml of HCL is neutralized by 42.5 ml of 0.10 M concentration of NaOH.Need to write a balanced equation for the reaction

Which one of the following is a defensive strategy

197. ## Math

Is 1 1/4 + 2/8 = 1 8/32 + 8 /32 = 2 Then 4 1/2 - 2 = 2 1/2 Are these correct

198. ## math

Hence or otherwise calculte the value of 2 to the power 2010 plus 2 to the power 2012 plus 10 divide by 2 to the power 2009 plus 1

199. ## Penn Foster

06042500 Which of the following situations is an example of overall cost leadership? A. A dress manufacturer wants to make its product unique in its category B. A company that manufactures school desks is looking for ways to make its desks less expensive

200. ## physics

a car moving at 30 m/s slows to a speed of 10 m/s in a time of 5 s. determine a.) the acceleration of the car (b). the distance it moves in the third second.

201. ## chemistry

find mass of calcium carbonate obtaqined in reaction of 10.0g of calcium oxide with an excess of carbon dioxide

202. ## English

1. They are caring. 2. They are friendly. 3. They are kind. 4. They are considerate =================== Are they the same in meaning?

203. ## math

Hannah and Francine have \$120. Hannah and Peter have \$230. Peter has 6 times as much money as francine. How much money does Hannah have?

204. ## History

1. The Spanish brought the first cattle to America in the 1400s. 1500s.* 1600s. 1700s. 2. Expansion of the railroads after the Civil War made it easier for Texas ranchers to get their herds to stockyards in St. Louis and Sedalia. Dodge City and Abilene.

205. ## beauty

why do we as therapist and artists have to abtian clients record

207. ## English

1. How much is it to take the subway? 2. Answer:________________________. ------------------- Q1: In #1 what does 'it' refer to? Q2: What does 'to take the subway' modify? Is 'to take the subway' a noun phrase or an adverbial phrase? Q3: What is the

208. ## math

You are paid \$5.75/hr at your part-time job delivering pizzas. You usually earn \$1.50/pizza as a tip. Your deductions are FICA (7.65%), federal (11.2%) and state (7.1%) If you work 10 hours and deliver 3 pizzas/hr, what is your gross pay including tips ?

209. ## Chemistry

Find the molarity of a sodium hydroxide solution obtained by dissolving 125.0 mg of sodium hydroxide in 50.ml volumetric flask.

210. ## chemistry

10 l of a solution containing 1.5 moles of HI

211. ## English

1. It takes an hour to get there. 2. It takes an hour so as to get there. 3. It takes an hour so that I can get there. ============= Does #1 mean #2 or #3?

212. ## Physics

An object floats in a liquid of density 1.2×10 kg/m3 with one quarter of its volume above the liquid surface. You are required to determine the density of the object

213. ## English

1. Today is April 15th. 2. Today will be sunny and warm. 3. Today will be sunny and warm this afternoon. 4. It is April 15th. 5. It will be sunny and warm this afternoon. ================= Which sentences are incorrect? Are they all grammatical?

214. ## math

rosario is arranging her doll collection on 5 shelves. the top shelf has 2 dolls on ti, and each shelf has 3 more dolls than the one above it. how many dolls does rosario have in all?

215. ## math

A cube with length 4cm is divided into 8 identical cubes.How much greater is the combined surface area of the 8 smaller cubes than the surface area of the original cube?

216. ## Physics

If a mass of gasoline occupies 70.01 at 20°C, What is the volume at 35°C?

217. ## English

1. She wants to read the comic book. 2. She wants to read the specific comic book. 3. She wants to read comic books. ========================= Does #1 mean #2 or #3? Does she want to read the comic book in a bookshelf, for esample?

218. ## maths

If a car travels first 100 kms by 40 km per hour speed and next 200 kms by 60 km per hour speed,then what is the average speed.

219. ## math

Sally and Marta had the same number of postcards. After Sally sold 18 pf her cards, Marta had 4 times as many postcards as Sally. How many postcards did each girl have to begin with?

220. ## chemistry

find composition of post-reaction mixture if 10.0g of sulfur and 20.0g of iron were reacted in a closed container producing iron (II) sulfide

221. ## Mathematics

What is the difference between 12√2 and 12? What is the difference between 6√2 and 6?

222. ## Pre-Calc

I do not know which value I am solving for or how to get there these are the instructions and info given. Use the given conditions to find the exact value of the expression. sinx=(-5/13), tanx>0, sin(x-(pi/3)) There is no question and the answer is

223. ## Literature

I need ideas of tricks that would happen in a truckster take with a lion and a monkey

224. ## chemistry

find mass of magnesium nitride produced in reaction of 5.0of magnesium with 10.0gof nitrogen. the reaction was carried out in a closed container

225. ## physics

a car set out at noon to ride from point a to point b, and another car started at 2 pm on the same day to ride from point b to point a. they met on the road at 4:05 pm, and each car reached their destination at exactly the same time. at what time did the

226. ## chemistry

find volume of 0.2 M sulfuric acid required to react with 15.0 ml of 0.25 M sodium hydroxide

227. ## math

a student in Greece discovers a poetry bowl that contains 28% of its original amount of c-14

228. ## finite math

Suppose that a 4-digit pin number is to be formed with the digits in {0, 1, ,2 ,3 ,4 ,5, 6, 7, 8, 9}. What is the probability that the pin number contains at least 3 odd digits

229. ## Math

What is the answer to ( what is the combined height of 3 nickels, 2 nickels, and 1 nickel?

230. ## linear algebra- check question

I just want to make sure my reasoning is correct. Let A be a 7X3 matrix whose rank is 3 a)are the rows of A linearly dependent or independent? I said dependent because a matrix whose rank is 3 means the row rank is 3, but if there are 7 rows then they have

231. ## Math

Write out the partial fraction decomposition of the following rational expression. 1.) 3x^2-7x-2/x^3-x 2.) x^3-x+3/x^2+x-2

232. ## chemistry

find the volume of 0.1 M hydrochloric acid required to react with 22.0ml of 0.07 M barium hydroxide

233. ## Chemistry

How many moles of NH3 must be added to 1.00 L of solution to dissolve 0.979 g of CuCO3? For CuCO3, Ksp = 2.3 × 10-10.

234. ## Chemistry

Are acids or bases suppose to react with carbonates?

235. ## math

If Benjamin drove at a constant rate, how many milesper hour did he drive?

236. ## math

maria throws a ball straight up with an initial velocity of 10m/s what is its velocity at the highest point?