1. science

an ice cube, a glass of cold water, and a swimming pool are each exposed to the same amount of sunlight on a hot day. after five minutes, the ice cube is melted and the cold drink is two degrees warmer, but the temperature of the swimming pool remains

2. physics

Estimate the change in gravitational potential energy when a person with mass 95kg rise from bed to a standing position. Assuming that the center of mass of a person is elevated by approximately Δh=0.50m.

3. science

Why did a portion of the tabletop get cold when Natasha placed her cold drink on the table? (1 point) The table’s molecules were vibrating more slowly in that area. The table’s molecules had spread further apart in that area. The table’s molecules

4. 3 other questions.

Sorry. Elizabeth wants to turn her diary entry into a fictional short story. Which BEST identifies a structural change that would allow readers to know more about the thoughts and feelings of Stevie and Elizabeth's parents? A)changing the point of view

5. Physics

A 25.0 m tall hollow aluminum flagpole is equivalent in strength to a solid cylinder of aluminum 3.50 cm in diameter. A strong wind bends the pole much as a horizontal force of 900 N exerted at the top would. How far to the side does the top of the pole

6. Calc

A plane is heading on a bearing of 200° with an air speed of 400 km/h when it is blown off course by a wind of 100 km/h from the northeast. Determine the resultant ground velocity of the plane.

7. Accounting

A credit to a liability account was posted to an owner's equity account. This would cause __________. A. assets to be overstated B. liabilities to be understated C. owner's equity to be understated D. net income to be overstated i think its D A credit to

8. physics

Two arrows are fired horizontally with the same speed of 31.8 m/s. Each arrow has a mass of 0.149 kg. One is fired due east and the other due south. Find the magnitude of the total momentum of the two arrow system in kg-m/s. (Hint: How do you combine

9. life orientation

what are the symptoms of intrapersonal?

10. Trig application

I have been working on this problem but I am not sure I am doing it right. During takeoff an airplane's angle of ascent is 18 degrees and its speed is 275 feet per second. A. Find the plane's altitude after 1 minute. B. How long will it take for the plane

11. Statistics

A) Identify the question, population, and sample. b) Discuss any potential bias or lurking variables that may affect the results.? c) Write about the extent to which we can generalize the findings to all people who use cell phones. Stewart Fist reported

12. Trig application

I am having trouble with this question. A privately owned yacht leaves a dock in Myrtke Beach, South Carolina, and heads toward Freeport in the Bahamas at a bearing of S 1.4 degrees E. The yacht averages a speed of 20 knots over the 428-nautical- mile

13. Pre ALGEBRA

A solid with at most one base cannot be which of the following? A) cone B) cube C) pyramid D) sphere Is it A or D? MS SUE PLEASE HELP ME

14. English

Contains dialogue is created from the mind of the author. -A.B Written in chronological order, following the author from the beginning of his/her life to the end - A.B? Does not necessarily follow the main character from beginning of his/her life to the

15. science

both carbon dioxide and water are pure substances. how are they similar to each other? A. Both substances have a set ratio of atoms that cannot be separated by physical means. B. Both substances have a set ratio of atoms that can be separated by physical

16. chemistry

Consider the following equation, which represents the combustion of hydrogen sulfide. 2H2S(g)+3O2(g)¨2SO2(g)+2H2O(g) What volume, in liters, of SO2 is formed when 120L of H2S(g) is burned? Assume that both gases are measured under the same conditions.

17. algebra

noj has the following test scores 69 74 76 84 91 his teacher will allow him to retake the test on which he scored lowest noj wants an average of at least 82 determine the least number of additional points noj must score on the retest

18. Math

An adult polar bear walks at an average rate of 5 kilometers per hour. 1. write an equation to find k, the number of kilometers a polar bear bear can walk in h hours. 2.make a table to show the relationship between the number of kilometers k a polar bear

19. Anthropology

Ms.Sue, I need your assisting please. Can you please give me advice on this Chipolatta Culture Music, I need you. Thank you. The Chipolatta music instruments consist of things like, drums, flutes, and other percussion instruments including their voices

20. financial management

you have \$42,180.53 in a brokeage act & you plan to deposit an additional \$5000 at the end of every future year until your accout totals \$250,000. you expect to earn 12% annually on the account. How many years will it take to reach your goal?

21. Chemistry

A solution is prepared by dissolving 25.0 g of pure HC2H3O2 and 25.0 g of NaC2H3O2 in 700 mL of solution (the final volume). (a) What is the pH of the solution? (b) What would the pH of the solution be if 65.0 mL of 0.650 M NaOH were added? (c) What would

22. Math

Flying to the wind, an airplane takes 4 hours to go 960 km. The same plane flying with the wind takes only 3 hours to make the same trip. Find the speed of the plane and the speed of the wind. I wasn't here for the lesson from my teacher but told me to ask

23. Math

An aeroplane is taking off from landing field has to run 500 metres.it leaves the ground in 10 seconds.what is the acceleration?

24. Accounting

A debit to the capital account was posted to an expense account. This would cause __________. A. assets to be overstated B. liabilities to be understated C. capital to be overstated D. expense to be understated i think its D

25. math

A man who can swim at 5km/h in still water swims towards the east to cross arriver. If the river flows from north to south at the rate of 3km/h a) Calculate: i) The resultant speed ii) The drift b) If the width of the river is 30m, find the time taken, in

26. mathematics concepts

Fraction symbols can usually be safely introduced A. at the beginning of third grade. B. near the end of first grade. C. near the end of third grade. D. at the beginning of second grade. my answer is c.

27. Math

The regular price of a sweater is \$32. For a sale, the price of the sweater is marked down 30%. What is the price of the sweater?

28. science

Why does the energy of a sound wave decrease over time?

29. chemistry

could one separate the components of a mixture of PbCl2 and Mg(OH)2 using only cold water?

30. Chemistry

To what volume should you dilute 124mL of an 8.10M CuCl2 solution so that 49.0mL of the diluted solution contains 4.81g CuCl2? Molar Mass of CuCl2= 134.45 g/mol Convert: 4.81g * (1mol/ 13.45g CuCl2)= 0.0358mol CuCl2 [CuCl2]= M= mol/L= (0.0358mol/ 49ml) *

31. sociology

Hume would agree with which statement about ethics? (Points : 1) There is a direct connection between the way that things are and the way they ought to be. Just because certain things are, does not mean that is the way they ought to be. One can use

Compute the difference between the ordinary interest and the exact interest for a loan with a principle amount of \$1100 at 12 percent for 120 days. I'm getting \$0.60 Can you check my work?

33. College Physics

A 3.0 m long light board with negligible weight is supported at each end by cables. a painter weighing 900 N stands 1.o m from the left cable. Find the tension in each cable.

34. Physics

The same voltage is applied between the plates of two different capacitors. When used with capacitor A, this voltage causes the capacitor to store 17 μC of charge and 5.7 x 10^-5 J of energy. When used with capacitor B, which has a capacitance of 6.9 μF,

35. math

Amanda's punch recipe : 7 parts mixed fruit juice, 2 parts of lemonade [Question : how much lemonade will she need to make 180 fluid ounces of punch ?]A .140 Fluid ounces or B. 40 Fluid ounces C. 36 Fluid ounces D. 60 Fluid ounces i think the answer is b

36. ap physics

A 0.461 kg mass is attached to a spring and executes simple harmonic motion with a pe- riod of 0.59 s. The total energy of the system is 2.4 J. Find the force constant of the spring

37. statistics

Heights of women have a bell-shaped distribution with a mean of 158 cm and a standard deviation of 8 cm. Using Chebyshev’s theorem, what do we know about the percentage of Women with heights that are within 3 standard deviations of the mean. What are the

38. calculus

A woman is attached to a bungee cord from a bridge that is 38m above a river. Her height in meters above the river t seconds after the jump is y(t)=19(1 + e^-1xcos(t)) for t>0. What is her velocity at t=1 and t=4?

39. sociology

Which of the following examples best demonstrates to most people that ethical progress has taken place over the past 200 years? (Points : 1) Laws that prohibit discrimination based on race Laws that have increased speed limits Laws that prevented women

40. Physics

Two identical capacitors store different amounts of energy: capacitor A stores 2.5 x 10^-3 J, and capacitor B stores 4.8 x 10^-4 J. The voltage across the plates of capacitor B is 12 V. Find the voltage across the plates of capacitor A.

41. maths

costs \$12.50 to see a movie at a theater near Jason’s house. It costs only \$1.95 to rent a DVD from an online service. A DVD player costs \$125. To the nearest whole number, how many movies must Jason watch on DVD instead of at the theater before he

42. English

Use a cliche in a sentence that you create. the sentence that I created is. My sister and I are so much a like that most people say we are " two peas in a pod". Did I do the sentence correctly

43. physics

A shuffleboard disk is accelerated at a 9.7m/s^2 from rest to a speed of 6.0m/s. What distance does the disk travel?

44. Math

Evaluate 6 log2 ∛64 +10log3 (243)^1/5)

45. chemistry

Two moles of an ideal gas initially at 27C and 1 atm pressure are compressed isothermally and reversibly till the final pressure of the gas is 10 atm. Calculate the work done. (R=8.314 JK-1mol-1)

46. statistics

A consumer advocacy group claims that the mean amount of juice in a 16 ounce bottled drink is not 16 ounces, as stated by the bottler.

47. American History

Hi there. I was just wondering whether the blundering generation thesis about the civil war boils down to a belief that individual choices caused the war. I wrote in my notes that it is linked to the belief that the civil war was inevitable but that

48. grammar

Can a rabbit run fast? yes,it can. (Is)

49. English

Can someone read my eight sentence paragraph. A high school diploma is very important to me. With a high school diploma I can show my children that your never to old to go back to school. Which will set a good example for my children to show them they need

50. Math

the sum of the integers from 1 to 10, inclusive, is 55. What is the sum of the multiples of 5 from 5 to 50 inclusive? Which equation would I use?

51. Trig application

I worked this problem out but I do not fully understand what I am doing. Fire tower A is 30 kilometers due west of fire tower B.. A fire is spotted from the towers, and the bearings from A and B are N 76 degrees E and N 56 degrees W, respectively. Find the

52. statistics

A student government representative at a local university claims that 60% of all the undergraduate students favor a move to Division I in college football. A simple random sample of 250 undergraduate students is selected. What is the probability that the

53. math

The distance between towns M and N is 280 km. A car and a lorry travel from M to N. The average speed of the lorry is 20 km/h less than that of the car. The lorry takes 1 h 10 min more than the car to travel from M and N. (a) If the speed of the lorry is x

54. math

A salesman gets a commission of 2.4% on sales up to Shillings 100,000. He gets an additional commission of 1.5% on sales above this. Calculate the commission he gets on sales wroth shillings 280,000. 100000(.024) + 0.015(280000 - 100000) 2400 + 2700 5100

55. sociology

Ethical theorists would be comfortable making which statement? (Points : 1) Ethical principles and ideas must always conform to the laws of a country. Ethical principles and theories can contradict laws of a country. It is important to not make anyone

56. Chemistry

(For fischer esterification) If you had collected the forerun from your distillation and tested it in the gas chromatograph, what would the most predominant compound be? -Isopentyl alcohol -Isopentyl acetate -Water -acetic acid

57. trigonometry- college

For two hours, a boat sails straight from port A to port C with a speed of 50 miles per hour. Port B is due east of port A, and the bearing of line segment BC is 20 degrees south west. Find the bearing of line segment AC. I really don't know what's the

58. sociology

Which of the following examples best demonstrates to most people that ethical progress has taken place over the past 200 years?

59. math

A trough (a place where horses and sheep drink water) has the shape of a half-cylinder with length 4 m and radius 20 cm. Water is poured into the trough at a constant rate of 300 cm3/s. At what rate (in cm/s) is the level of the water in the trough rising

60. college physics

a 3m long light board with negligible weight is supported at each end by cables. a painter weighing 900 N stands 1m from the left cable. find the tension in each cable,

61. Math

an adult manatee eats approximately 100 pounds of aquatic food per day. write an equation to find p, the numbeer of ponds of food an adult manatee eat in d days

62. maths

Saudi Arabia has proven oil reserves of 2.63  1011 barrels. Kuwait has proven oil reserves of 9.78  1010 barrels. Canada has proven oil reserves of 1.789  1011 barrels. What are the combined proven oil reserves of the three countries?

63. Math

Find the point of intersection on the graphs of 2x+5y=15 and x-3y=6 How do I do this?

64. Urgent maths homework help

At a boarding school, in the evening, 9 students always take walks in groups of 3. How can the groups be arranged so that each person walks in a group with every other person exactly once in 4 days? I would like to know whether there is a trick to these

65. Civics

Which was an outcome of the U.S. supreme court decision in Brown v. Board of education (1954)?

66. chemistry

PLZ help me understand the way of solving this equation quick A 0.07 mol sample of octane C8H18 absorbed 3.5*10^3 j of energy. calculate the temperature increase of octane if the molar heat capacity of octane is 254.0 j/k*mol

67. maths

Sid and Libby are planning to sell pies at a local fair. They spend \$200 to rent a table at the fair. Their costs for ingredients, other supplies, baking, and packaging are \$3.00 per pie. Sid and Libby plan to sell the pies for \$8 each. How many pies must

68. Physics

A 5.0- kg concrete block rests on a level table. A 3.7- kg mass is attached to the block by a string passing over a light, frictionless pulley. If the acceleration of the block is measured to be 1.0 m/s2, what is the coefficient of friction between the

69. maths

In a class, there are 12 girls and 14boys. Express in its simplest form, the ratio of girls to the total number of students in that class.

70. Chemistry

A student added some bromine (reddish orange) in some carbon tertrachloride to a sample of butane in a test tube and placed it in a dark cupboard. When the student removed the test tube it still had the reddish orange colour. When the test tube was left on

71. maths

. Louisa has \$4,500 in her savings account. She has to choose between two savings plans. Under plan A, she will increase her account balance by 10% per year. Under plan B, her account balance will increase by \$525 per year. If she plans to keep her money

72. riddle

what starts with a t ends with a t and is full of t.

73. chemistry

A student added some bromine (reddish orange) in some carbon tertra chloride ro a sample of butane in a test tube and placed it in a dark cupboard. When the student removed the test tube it still had the reddish orange colour. When the test tube was left

74. Math

The fifth term of an arithmetic sequence is 22 and the 15th term is 62. Find the 100th term and the sum of the first 60 terms. I'm having trouble figuring out how to do this.

75. math

Jill, Meg, and Beth are sisters. Jill is 2 years younger than Meg. Beth is half as old as Meg. Use the same variable to write three algebraic expressions based on this situation. Tell what the variable represents and what each expression represents. THANK

76. math

A wire of length 4 m is cut in two parts and the first part is bent in the shape of a square, while the second part is bent in the shape of an equilateral triangle. For which lengths of these parts the total area enclosed by the square and the triangle is:

77. math

A vector can be used to represent the path of a drill tip used to bore a deep mine shaft in Sudbury one quarter of the way to the centre of the Earth. Represent the vector using a directed line segment and Cartesian co-ordinates and describe which

78. chemistry

Put the following compounds in order of INCREASING oxidation number of N: N2H4, NO3-1, N2, NH3 ?

79. Math

How many times larger is the area of a square (Length of Sides = A) than the area of an equilateral triangle (Length of Sides = 0.5A)?

80. Math

Put 25 marbles into 3 piles, each has an odd # of marbles. How many ways can you do this??? Do you have the formula?

81. physics

A ball is thrown straight up from the ground at 10m/s, and simultaneously a ball is thrown straight down a 10m-high ledge at 10m/s. At what height do the two balls pass?

82. physical science

A car travels east for 15km at a speed of 30km/h .it then turns around and returns along the same path at 60km/h.what is the cars average velocity

83. Physics

A certain force gives mass m1 an acceleration of 13.0 m/s2 and mass m2 an acceleration of 3.6 m/s2. 1) What acceleration would the force give to an object with a mass of (m2-m1)? 2) A certain force gives mass m1 an acceleration of 13.0 m/s2 and mass m2 an

84. Physics

What is the capacitance of a capacitor that stores 5.2 μC of charge on its plates when a voltage of 4.8 V is applied between them?

85. physics

state coulombs law

86. Human Geography

What does "challenging white privilege" means?

87. Accounting

A debit to a revenue account was posted to an expense account. This would cause __________. A. expenses to be overstated B. revenue to be understated C. expenses to be understated D. capital to be overstated i believe its C

88. mathematics concepts

Joseph is making different shapes with a rubber band and a geoboard. Which of the following would be a geometric concept that Joseph is informally exploring? A. Estimation B. Patterns C. Volume D. Probability my answer is b.

89. math concept

Sarah understands that if there are 11 ones, the first 10 move over to the tens column as one unit (i.e., one group of 10). What concept does this understanding represent? A. Renaming B. Regrouping C. Borrowing D. Place value my answer is a

90. General Chemistry HELP!

Research and describe one current application of the knowledge of the atom. This application can be in any field of your choice. This means the field can be scientific, such as medicine, or nonscientific, such as entertainment. The purpose of this

91. Math

Find the slope of the line L1 given that L1 is perpendicular to L2 and L2 passes through (-3,-1) and (-5,7). How do you do this kind of problem

92. Calculus

Evaluate: the integral from pi/8 to pi/6 csc2xcot2xdx

93. Math

A video game that originally costs \$68 is on sale at a 15% discount. What is your final cost of the video game If there is a 5% sales tax?

94. math

how can find on the particular solution of the linear DE's d^3y/dx^3+4d^2y/dx^2+4dy/dx=exp(-2x)

95. math

A group of people planned to contribute equally towards a water project which needed Ksh 200,000 to complete, however, 40 members of the group without from the project. As a result, each of the remaining members was to contribute Kshs 2,500. (a) Find the

96. temple

Ethical theorists would be comfortable making which statement?

97. Physics

A 70 kg person is having a tug-of-war. The rope is horizontal and 1.3 m above the ground. This person’s center of mass is 1.0 m from the ground when he is in an upright standing position. If the force his opponent exerts on the rope is 400 N, what angle

98. Physics

Three capacitors (3.83, 5.89, and 12.9 μF) are connected in series across a 58.0 V battery. Calculate the voltage across the 3.83 μF capacitor.

99. soc

A justified belief is (Points : 1) the expression of a view that may not have evidence supporting it. a confidently held belief that might merely be an opinion. a claim for which one has evidence and warranted trust. all of the above. none of the above.

100. English

Five sentence paragraph. To make a perfect turkey sandwich you will need, butter knife, turkey, cheese,mayo, lettuce, tomato and two slices of bread. Next, place the mayo evenly on both side of the bread. On one slice of the bread place the

Compute the total amount to be repaidon a \$1920 loan at 8% for 135 days. Base your calculation on exact interest(365-day year). I'm getting \$2335.29. Can you check my work?

102. Math

determine the point of intersection for this pair. y=-3x-2 and 2x+3y=5

103. chemistry

how many CO would be needed to reduce 19.1 grams of iron (III).

105. math

The length and breadth of a rectangular paper were measured to be the nearest centimeter and found to be 18 cm and 12 cm respectively. Find the percentage error in its perimeter.

106. chemistry

A dry ethene exerted a pressure of 680mmhg at 17degree celcius.what pressure would be exerted if the sample is collected over water at 17degree celcius? (s.v.p at 17degree celcius=14.0mmhg)

107. physics

A 3.9kg block moving at 2.0 m/s toward the west on a frictionless surface has an elastic head-on collision with a second 0.80kg block traveling east at 3.0 m/s. a)Determine the final velocity of first block. Assume due east direction is positive.

108. Math

The line that passes through (4,3r) and (2+r,-6) is perpendicular to the line with equation 5x+3y+12=0. find r.

109. government

When the Court decides a case, it bases its decision on

110. Calculus

Evaluate by U-substitution: the integral of xcubedroot(x-2) dx

111. math

how can find sum (x) from x=1 to x=n

112. Math

Question: 1/2(x+3) + 5x = 2 - 4/3 (1-2x) My work: 5 1/2x + 3/2 = 2/3 + 8/3x 33x + 9 = 4 + 16x 17x = -5 x = -17/5 Did I do this correctly?

113. Math

Determine the solution set of 2x-3y

114. math

prove sum(x)=n(n+1)/2 from x=1 to x=n

115. math

Pharmacy Goods has a total of \$423,400 sales. Beginning inventory total cost was \$105,850 and ending total cost was \$127,020. What is the turnover rate?

116. Maths

Write the following number in scientific notation 2 500 001

117. maths

Can someone help me to solve these questions please? 1) 3^x+1=9^x. Find the value of x. 2) find the value of m for which. 3^2M^-1=243.

118. Maths

Investigate and illustrate the behavour of the following geomentric series with r>1 2+4+8+16+32+64+.......... So s§=? Use at least three examples

119. physics

A bicycle has wheels with a diameter of 0.570 m. It accelerates uniformly and the rate of rotation of its wheels increases from 181 rpm to 260 rpm in a time of 19.9 s. Find the linear acceleration of the bicycle. i tried converting everything to linear to

120. BioMechanics

You have a subject (height = 150 cm, mass = 85 kg) lying prone on a moment table with their feet pressed against the foot rest. Assuming that you zeroed the scale before the subject got on the table, the scale now reads 40 kg. Where is the centre of mass