# Questions Asked onMarch 29, 2017

1. ## Physics

In a simple machine, the energy input is 120j. If the efficiency of the machine is 80%. Calculate the energy output

2. ## Chemisty

Calculate the Volume occupied by 1.5 moles of an ideal gas at 25 degrees Celsius and a pressure of 0.80 atm. (R= 0.08206 L atm/(mol*K). I've tried using the ideal gas law: PV=nRT but i can't seem to get where I am getting lost. V=(1.5mol)(0.08206 L

3. ## English--quick question

Is disbelievement a valid word? if not, what word could I use instead? It is being used as a noun in this context: The disbelievement of the people...

4. ## Math

My homework says "A circle is divided into 9 equal parts.Why is the measure of the angle?"I need help i dont get it!

5. ## physics

Water has a specific heat of 4.186 J/g°C. How much heat is required to increase 10.0 g of water from 25.0°C to 30.0°C?

6. ## Math

A muffin recipe calls for a ratio of 5 cups of flour to 2 cups of sugar. For each cup of sugar that is used, how many cups of flour are needed?

An artifact originally had 16 grams of carbon-14 present. The decay model A = 16e -0.000121t describes the amount of carbon-14 present after t years. How many grams of carbon-14 will be present in 5715 years? A. Approximately 7 grams B. Approximately 8

8. ## Precalculus

If f and g are functions of time, and at time t = 3, f equals 8 and is rising at a rate of 3 units per second, and g equals 5 and is rising at a rate of 8 units per second, then the product fg equals __ and is rising at a rate of __ units per second. I got

9. ## MATH

A cube has a volume of 27 cubic units. What is the length of the side of the cube? I don't understand how to get the answer for this question!! Does it mean one side or all sides? I know that 27 / 4 = 6.75 but I don't understand if it means all sides or

10. ## MATH

Two buses leave the same station at 8:00 pm. One bus travels north at the rate of 30 kph and the other travels east at 40 kph. How many kilometers apart are the buses at 10 pm?

11. ## physics

a stone attached to the end of elastic string is whirled around in a circular path of radius 20cm if the stone makes 15 complete revolution in 5 seconds, calculate its angular and linear velocities.

12. ## Math

To get a driver's license, an applicant must pass a written test and a driving test. Pasts records show that 80% of the applicants pass the written test and 60% of those who have passed the written test pass the driving test. Based on these figures, how

13. ## Chemistry

What is the ratio of rate constants at 305k and 300k if the activation energy of a reaction is 58.3kJ/mol

14. ## Maths

The temperature at 12 was 10 degree above zero . If it decreases at the rate of 2 degrees per hour, what was the temperature at 2 afternoon?

15. ## economics

Given demand curve of the monopolist :Q=30-0.3P,& given the cost function C=2Q2+20Q+10, a)find the profit maximizing level of output &price b)determine the max possible profit. c)check for the 2nd order condition.

16. ## SS

because of the treaty of tordesillas the language and background of brazil are _____.

17. ## physics

There are two charged particles. They exert an electrostatic force of 10 N on each other. Suppose the distance between the two particles is increased to five times the original distance. What will the magnitude of the force?

18. ## Science

For an organism that has a diploid number of chromosomes of 12, give the number of chromosome/chromatid copies at the end of the following cell-cycle phases: a) G2 phase b) Meiosis I metaphase c) Meiosis II telophase

19. ## American gov 1 question answer check

12. The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people. –Tenth Amendment This amendment is an example of which of the following? (1 point) prior

20. ## chemistry

metals with 8-hydroxyquinoline, C9H7NO. After weighing the mixed precipitate, the precipitate is dissolved and the amount of 8-hydroxyquinoline determined by another method. In a typical analysis, a 127.3 mg sample of an alloy containing iron, manganese,

21. ## Math

At a professional sports game, T-shirts are shot out of a small cannon into the crowd. Suppose a T-shirt is shot from 1 meter off the ground with an initial upward velocity of 20 meters per second. The height of the path of the shirt, in meters, is

22. ## Math

Sam ordered 1/2 of a sandwich. He only ate 1/2. How much of the whole sandwich did he eat?

23. ## gerunds

Write the gerund phrase(s) in the sentences below. label each one subject, direct object, predicate noun, or object of a preposition. 1. Camping and fishing on the Isleta Reservation are popular tourist activities. Camping and fishing on the Isleta

24. ## Algebra 2

Find the exact coordinates of the points on a circle of radius 12.5 at an angle of 180°

25. ## Mathematics

True / False: The Plurality-with-Elimination Method sometimes violates (i.e. does not always satisfy) the majority criterion. 1. False because the plurality-with-elimination method always requires the winner to have the majority of votes. 2. True because

26. ## Chemistry

How many grams of lithium are required to completely react with 61.9 mL of N2 gas at STP

27. ## social studies

Areas of Mexico that can support agriculture are most affected by variations in ? 1) altitude 2) longitude 3) attitude 4) animal species I think altitude

28. ## math

Owen and Ethan have \$175 together. How much money does each of them have if Ethan has \$33 more than Owen?

29. ## math

The illustration at right shows a rectangular box, three of whose edges coincide with the coordinate axes, and one of whose vertices is (3, 6, 4). Give an equation for the plane containing the front face of the box. Do the same for the top and right faces.

30. ## Math

A fair charged \$2.50 admission for adults and a dollar for children. The receipts for 1 day were \$1951 on 1300 paid admissions. How many adults attended the fair that day?

31. ## Geometry

I really don't understand this.... You want 12feet to equal 9inches on the blueprint. What scale factor must you use to create an accurate blueprint?

32. ## physics

There are three charges on a line. Charge A has 6e-07 C and is located at x=0. Charge 1 has 2e-06 C and is located at x = 1 m. Charge B has -5e-05 C and is located at x = 4 m.

33. ## American gov

But freedom to differ is not limited to things that do not matter much. That would be a mere shadow of freedom. The test of its substance is the right to differ as to things that touch the heart of the existing order. . . . If there is any fixed star in

34. ## Math

If each cube represents 0.25 in3, what is the volume of the prism? A) 6 in3 B) 12 in3 C) 48 in3 D) 75 in3 I am not really goo with these, but I think the answer might be b. Please give me the explanation. Thank you

asked by Becky G ( P.S. Not the celeb)
35. ## Math

What are the like terms in this expression? 9a - 3b + 4ab A) 9a and -3b B) 9a and 4ab C) 9a, -3b, and 4ab D) no like terms I think it is d.

36. ## American gov

i know i'm posting a lot but i just wanna be sure. my answer is b 14. Read the following excerpt from the Supreme Court’s ruling in Stanley v. Georgia. The makers of our Constitution undertook to secure conditions favorable to the pursuit of happiness .

37. ## math

A set of data is shown below. x: –1 0 1 2 3 4 5 y: 3 7 5 6 7 8 Using a line of best fit, what is the value of the residual for the data at x = 2? Round your answer to the nearest thousandth. I dont remember line of best fit if you could please explain

38. ## algebra invers mathod

4x+y=8/2x+3=-1

39. ## PE

your digestive system has three main functions:digestion, absorption and elimination. in which organ dose absorption begin? a. mouth b.stomach c.(small intestine) d.gallbladder

asked by Help I need somebody not just anybody
40. ## social studies

What use was made of this order, which set up military areas where the Secretary of War controlled who would enter the place, who would leave or stay, and who was excluded?

41. ## math

A data set is shown below. x y 1 6.00 2 5.04 3 4.23 4 3.56 5 2.99 6 2.51 7 2.11 Using an exponential best-fit model, what is the residual when x = 1. Round your answer to the nearest hundredth. This is the problem i dont understand line of best fit i dont

42. ## Math

A salesperson at a furniture store earns a 3% commission on all sales. How much commission does the salesperson earn on a \$1400 sale? I think it is \$420.

43. ## MATH URGENT HELP!

you put 5,000 in an account that is compounded quarterly. the annual interest rate ,r, is 4%. how much will be in the account after 10 years?

44. ## Math

Equivalent Ratios x y 3 4 9 ? 18 24 What number is missing from the table of equivalent ratios? A) 10 B) 12 C) 15 D) 16 i think it is 16 or 12

45. ## American gov

16. What ruling did the Supreme Court make regarding flag burning in Texas v. Johnson? (1 point) It is legal to burn flags other than the U.S. flag, but burning an American flag is not free speech because it affects public morale. Burning any sort of flag

46. ## Social Studies

After reading more text I changed my answers on these two 1."Immigrants who arrive in american cities are poor and frightened. They are helped to find jobs and housing. There new comers should show their gratitude at voting time."Use this statement to

47. ## Social Studies

I really need help on my quiz can u plz help!!

48. ## Math

|-10| + |5| A) -15 B) -5 C) 5 D) 15 I think A is the answer.

49. ## American gov

17. The requirements for libel detailed in New York Times v. Sullivan protect which principle? (1 point) equal protection of the law right to criticize the government separation of church and state judicial review as i'm researching i see protection a lot.

50. ## Math

Now I really need help with this one because every time I think it is one answer it ends up wrong. Identify the question that is NOT statistical. A) According to the rules, how many swimmers are on a team? B) What were the times of the top five swimmers in

51. ## biology

if there is no colonies on the wild type or lysate or ADP-6only plates, did you obtain an approximate 10x-fold change in colony numbers between the different dilutions? did you expect this? pls help

52. ## Math - Mean Value Theorem

Suppose f(x)=αx^2+βx+γ is a general quadratic polynomial with α≠0 and let [a,b] be any interval. According to the Mean Value Theorem there is at least one number c such that f(b)−f(a)=f′(c)(b−a). In this particular case the number c is unique

53. ## math

What is the product of the complex numbers (-3i+4) and (3i+4)? I've forgotten how to do this...

54. ## Chemistry

What is the hydrogen ion concentration of a 0.22 M hypochlorous acid solution with Ka = 3.5E-8? The equation for the dissociation of hypochlorous acid is: HOCl(aq) = H+(aq) + OCl-(aq). I keep getting 3.60 as the concentration, but that is the wrong answer.

55. ## chemistry

How do you rationalize an infrared spectrum of salicylic acid and aspirin? How do you know which is which?

56. ## science

Where are the major zones of volcanism? Thanks!

57. ## Science

Identify the benefits that your space mission might provide for modern society. Explore the possibility of connecting your space mission with satellites that are already gathering information as they orbit Earth. i neeeeeeeeed help

58. ## algebra

6 x, when x = 7 Evaluate

-9.4(z-8)-4.1=5(z+2.5)-5.9 z= z= (asking for rounded 4 decimal points)

60. ## financial securities

Cat Bonds An insurance company has sold insurance to cover damage that arises from hurricanes in the South Texas area. If a hurricane occurs, the insurance company is faced with losses as it pays out claims. The magnitude of the losses will depend on many

61. ## Algebra

Can you guys help me solve this problem I dont know why I cant get it. Thanks. Solve for x. (26000-x)2813.95 + x(314.73)=26000(640.2)

62. ## math

Camila wanted to learn cooking so that she could help out at home. In the cooking class, 10 students shared 6 8 kg of sugar equally. How much sugar would each student get? (Please round off your answer to the nearest whole number if needed. Leave your

63. ## physics

a man weighs 162 pounds, and is 69 inches tall. his forearm is parallel to the ground. he holds an 8 pound weight in his hand. the biceps has an angle of insertion of 85 degrees with a distance of 1.4 inches at insertion. the system is equilibrium. what

64. ## writing

''afford taking us''

65. ## bussiness

1.Please calculate how many cartons (rounded number) a 20ft GP Container can accommodate respectively according to the information above. 20ft GP container:cartons

66. ## calculus

Evaluate the integral. from 0 to π/2 sin^3(θ)cos^5(θ) dθ

8 x + 4 = 68

68. ## Maths

The sum of money that will produce â‚¹1770 as simple interest in 7.5 year as 8% at per annum is how much

69. ## SS

Which of the following statements best describes Mexican history after independence? A:Mexico has been at war or in a state of revolution from independence to today. B:social class has not been an important factor in determining opportunity. C:many

70. ## Maths

Fifty people said they liked apples or bananas or both. Forty percent of people like apples and 70% of the people like bananas. What percentage of people like only apples?

71. ## Chemistry

An ionic compound dissolved in water, separated into its ions according to the following equation: MA2 (s)--> M^+2 (aq) + 2A^- (aq). If the ground state electron configuration of the two ions are similar to those of neon. Ne, and of Kr, the two elements in

72. ## math

Time Height (Weeks) (CM) 1 1 2 4 3 6 4 9 5 11 ~Ok i have this problem and its a correlation coefficient, There is a lot of questions but how would you find if its linear or exponential.

73. ## Decroly

If n represents the amount of songs stored on an MP3 player , analyze the meaning of the expressions n + 7, n - 2 , 4 n and n \2

74. ## physics

A steel wire is used to lift heavy object. The cable has a diameter of 14.25 mm and an initial length of 33.5 m. If the cable stretches 2.50 mm, what is the mass of the heavy object? Use 20.0 x 10^10 Pa for Young’s modulus for steel. Give your answer in

75. ## Math (Mrs. Sue help!!!)

Solve the inequality. d - 6 > -4 A. d > -2 B. d > -10 C. d > 2 D. d > 10

76. ## Chemistry

What should the molar concentrations of benzoic acid and sodium benzoate be in a solution that is buffered at a pH of 4.75 and has a freezing point of -2.0 ∘C? (Assume complete dissociation of sodium benzoate and a density of 1.01 g/mL for the solution.)

77. ## Chemistry

25.0 g of potassium acetate (CH 3 COOK) are dissolved in 1.00 L of water. Calculate the pH of this solution. (PKa = 4.76 for CH3COOH)

78. ## English

1. I need a solid T-shirt. 2. I need a plain T-shirt. 3. I need a solid-color T-shirt. 4. I need a self-color T-shirt. 5. I need a one-color T-shirt. 6. I need a unicolor T-shirt. ---------------------- Are they all the same in meaning? Which ones are

79. ## math

ice in a refrigerator melts at rate of 3 kg per hour. the temperature outside is 27°c. find the minimum power output of a motor used to drive the refrigerator,which just prevents ice from melting. latent heat of ice = 80 cal/g,J=4.2 joule/cal, 1 h.p = 746

80. ## Algebra

what is the cube root of 14 in radical form

81. ## Physics - Capacitance

In the case of having two plates of a capacitor, in the formula for capacitance C = (Epsilon)(A/d), is A the sum of the areas of each plate or just the area of one plate? And if it is the latter, then it can be assumed that both plates have the same area,

82. ## chemistry

What is the symbol equation of iron nails with copper sulfate solution.

83. ## ELA

Jacob is writing a report about the benefits of running. He is looking for sources to support his opinion that running has health benefits. Which choice would be LEAST LIKELY to provide him with information to support his opinion? A) a health magazine B) a

84. ## Trigonometry

Triangle ABC is given where the measure of angle a is 33°, a=15 in., and the height, h, is 9 in. How many triangles can be made with the given measurements? Explain your answer.

85. ## Math

I help solving these out can someone work through them with me???? 19. WorkPad Note: In questions 19-21, remember to show all of the steps that you use to solve the problem. Be sure to use the text box where the question mark (?) first appears to show your

86. ## math

A prism is completely filled with 96 cubes that have edge length of 12 cm. What is the volume of the prism?

87. ## Math

Marissa bought 6 fewer pints of soda then orange juice.how many cups of soda did she buy

88. ## Science

A student adds 5 g each of sand, sugar, and salt to 50mL of water. Did he make a solution? Explain.

89. ## Social Studies

1. Which river helped Rome grow and expand? A. Tigris

90. ## Math

Match the expressions with thier equivalent equations in the columns. List A: List B: 6x+12 6(1+x) 6+6x 6x-6 6(x-1) 6(x+2) Fill in the blank: The expression 6x+12 is equivalent to the expression __________ The expression 6+6x is equivalent to the

91. ## social studies

Mexico is building a stronger workforce by? 1} holding free election 2)permitting remissions 3)eliminating competition 4)investing in education I think #1

92. ## physics

An electron and a proton have charges of opposite sign, but the magnitude of their charges has the same value of 1.60 10-19 C. Suppose the electron and proton in a hydrogen atom are separated by a distance of 4.30 10-11 m. What are the magnitude and

93. ## ECONOMICS

CALCULATION 4 DEMAND AND SUPPLY FUNCTION FOR A COMMODITY ARE GIVEN QD=4P+30 AND QS=2P+6

94. ## Punakha central school. Bhutan

Dissociation constand of propanoic acid is 1.76. Determine degree of dissociation of P ropanoic acid in 0.2molar in aqueous solution?

95. ## College Chemistry

Calculate the pH at the equivalence point in the titration of 55.0 mL of 0.180 M methylamine(Kb = 4.4 × 10−4) with 0.330 M HCl.

96. ## Physics

a boy whose weight is 600 N runs up a flight of stairs 10 m high in 12 second .What is his average power?

97. ## Physics

a . rather then taking the elevator a a 65kg student decided to climb 276m vertical height of stairs to the observation deck of the effiel tower. How much work does the student do against gravity climbing to this level? b. It's estimate that 1kg of fat

98. ## Math

A recipe requires 3/4 cups of nuts for 1 cake. Enter the maximum number of cakes that can be made using 7 1/2 cups of nuts

99. ## probalitity

Let Θ1 and Θ2 be some unobserved Bernoulli random variables and let X be an observation. Conditional on X=x, the posterior joint PMF of Θ1 and Θ2 is given by pΘ1,Θ2∣X(θ1,θ2∣x)= 0.26, if θ1=0,θ2=0, 0.26, if θ1=0,θ2=1, 0.21, if θ1=1,θ2=0,

100. ## Calc

The time interval T, in minutes, between patient arrivals in an emergency room is a random variable with exponential density function p(t) = 0:125e^-.125t. What is the average time between patient arrivals? What is the probability of two patients arriving

101. ## Algebra

At noon, Professor Simon has a petri dish with 10,000 cells of Bacteria A. In another petri dish, he has 33,000 cells of Bacteria B. Every hour, Bacteria A grows by 8%. Every hour Bacteria B cells die off, decreasing the number of cells by 6%. After how

102. ## Physics

An pie plate of radius 0.12 m spins and accelerates at a constant rate of 13 rad/s. What was its angular acceleration? R=0.12. W1=13 W2=29 t=5.4 (29 -13) /5.4= 2.96rad/s is the answer I calc but the answer key had 2.8 rad/s

103. ## chemistry help anyone

use Rydbuz equation to calculate the wavelength of the third line in the paschen series of the hydrogen spectrum.give ur answer in Nm. RH=2.18 * 10^-18j, H=6.63 * 10^-34J. Step plz

104. ## maths probability plz help

The Probability that a USA-based business man goes to paris by car is 0.6 and by air is 0.4. If he goes by car, the probability that he will be early for his appointment is 0.3 while if he goes by air, the probability he'll be early is 0.65 (i) what is the

At noon, Professor Simon has a petri dish with 10,000 cells of Bacteria A. In another petri dish, he has 33,000 cells of Bacteria B. Every hour, Bacteria A grows by 8%. Every hour Bacteria B cells die off, decreasing the number of cells by 6%. After how

106. ## math

what is 8,903.045 in 100s place

107. ## mathematics sequence need help

4, 10, 16, 22,... are the A.P obtained from the 1st differences of a Quadratic Sequence with a 1st term of 3. Determine the formula for the sequence & hence its 25th term plz show step

108. ## math

Santiago, a park ranger, was trying to estimate the number of catfish in a lake. He randomly caught 32 catfish, tagged them, and let them go. Six months later, he surveyed fisherman at the lake about how many catfish they caught that were tagged. His

109. ## chemistry

Iron can be determined gravimetrically by precipitating as Fe(OH)3 and igniting to Fe2O3. The sample to be analyzed is weighed and transferred to a 400-mL beaker where it is dissolved in 50 mL of H2O and 10 mL of 6 M HCl. Any Fe2+ that is present is

110. ## Science

Two trains are traveling towards each other, starting 100 kilometers apart. One train travels at 40 kilometers per hour while the other travels at 60 kilometers per hour. The plane starts flying at 90 kilometers per hour, starting from the location of the

111. ## calculus

It is a dark clear night. The air temperature is 15◦ C. A body is discovered at midnight. Its temperature is 23◦ C. One hour later, the body has cooled to 20◦ C. Use Newton’s law of cooling to determine the time of death.

112. ## Fractions

Mother saved 7/8 of a pie for dinner. Her son came home from school and ate the pie. How much pie is now left for dinner

113. ## Physics

A Micro –Hydro turbine generator rotor is accelerating uniformly from an angular velocity of 610 rpm to its operating angular velocity of 837 rpm. The radius of the rotor is 0.62 m and its rotational acceleration is 5.9 rad/s2. What is the rotor’s

assume the function f(x) and its inverse f-1(x) are both defined for xer. give a geometric interpretation of the composite function y=f(f-1(x))

115. ## Grammar

Replace with vs. Replace for? 1. Replace white rice with brown rice. Does this mean use brown rice instead? 2. Replace white rice for brown rice. Does this mean use white rice instead?

116. ## Math

Is the decimal 2.628 considered to be statistically significant?

117. ## mushi

Solve for d Spherical triangle whose parts are C = 89, a = 70°, b = 60° please show me ste

118. ## Math

For which value of x is the equation 2(1 + x) = x + 3 true? A) 1 B) 2 C) 3 D) 4 I think it is c.

119. ## Math NEED HELP URGENT

At noon, Professor Simon has a petri dish with 10,000 cells of Bacteria A. In another petri dish, he has 33,000 cells of Bacteria B. Every hour, Bacteria A grows by 8%. Every hour Bacteria B cells die off, decreasing the number of cells by 6%. After how

120. ## Chemistry

0.25 mol dm-3 solution of hydrochloric acid?

121. ## American gov

Check my answers pleaseee i have a star * by my answer 4. Rights are not absolute. Which of the following examples would support this statement? Select all that apply. (3 points) ( this one has 3 answers) A citizen criticizes public policy. A man yells

122. ## physics /torque

a door is fixed with the support the length of the door is 3.3foot. the handle is attached at o.3foot. from a side opposiite to the side of hinches. it is opened with the torque of 5Nm. how much force is needed

123. ## Math

A swimming pool and deck are built in a rectangle with length 40 ft and width 18 ft. If the pool itself is 320 square feet, what is the area of the deck itself? A) 320 square feet B) 400 square feet C) 480 square feet D) 560 square feet I think it is c.

124. ## Technology

Can someone help me write a 5 paragraph essay on microsoft word and how we use it and stuff? if you could that would be amazing! thanks!!

125. ## Math

Is x+3=2y and x=2y-3 have infinitely solutions or one solution or no solution