# Questions Asked onDecember 2, 2010

1. ## Chemistry

Calculate the molarity and the molality of an NH3 solution made up of 30 g of NH3 in 70 g of water. The density of the solution is 0.982 g/ml. Molar Mass of NH3 = 17.04 g

2. ## Physics

A 55 kg skier is at the top of a slope that is 10.0 m high. a) Set the zero level for gravitational potential energy at the bottom of the slope and find the gravitational potential energy for the skier at the top and the bottom of the slope. What is the PE

3. ## math

The 2 pulleys in the figure have radii of 15 cm and 8 cm, respectively. The larger pulley rotates 25 times in 36 seconds find the angular velocity of each pulley in radians per second. Find angular velocity of each pulley in radians per second.

4. ## AP Chemistry

Two solid objects, A and B, are placed in boiling water and allowed to come to temperature there. Each is then lifted out and placed in separate beakers containing 1000 g water at 10.0 degrees Celsius. Object A increases the water temperature by 3.50

5. ## chemistry

a student needs to prepare an aqueous solution of sucrose at a temperature of 20 degrees c with a vapor pressure of 15. 0 mm Hg. How many grams of sucrose (mm=342 g/mol) does she need if she uses 375 g H20? (the vapor pressure of water at 20 degrees c is

6. ## Chemistry

The solubility of CO2 in water at 25 degrees C and 1 atm is 0.034 mol/L. What is its solubility under atmospheric conditions? (The partial pressure of CO2 in air is 0.0003 atm.) Assume that CO2 obeys Henry's law. My Answer: 1.02 x 10^-5 mol/L

7. ## Statistics

A survey is being planned to determine the mean amount of time corporation executives watch television. A pilot survey indicated that the mean time per week is 12 hours, with a standard deviation of 3 hours. It is desired to estimate the mean viewing time

8. ## College Chemistry

a 1.00-L solution saturated at 25°C with calcium oxalate (CaC2O4) contains 0.0061 g of CaC2O4. The solubility constant (Ksp) for this salt is [CaC2o4= 128.09 g/mol] a) 6x10^ -3 b) 4.6x10^ -8 c) 2.3x10^ -9 d) 1.5x10^-4 if you could please work it out for

9. ## physical science with earth science

Write a balanced chemical equation for the reaction for propane C3H8 burning in oxygen to for carbon dioxide and water vapor

10. ## Algebra

How many possible 9-digit zip codes are possible if the first digit cannot be zero?

11. ## Physics

A bicycle wheel of radius .7m is rolling without slipping on a horizontal surface with an angular speed of 2 rev/s when the cyclist begins to uniformly apply the brakes. The bicycle stops in 5s. Through how many revolutions did the wheel turn during the 5s

12. ## chemistry

From the following information, determine ΔH°f of malonic acid, CH2(COOH)2(s). CH2(COOH)2(s) + 2O2(g) → 3CO2(g) + 2H2O(l); ΔH° = –861.0 kJ Substance ΔH°f (kJ/mol) CO2(g) –393.5 H2O(l) –285.8 A. 2613.1 kJ B. –1540.3 kJ C. –2613.1 kJ D.

13. ## Physics: Fluids

A sample of an unknown material weighs 260 N in air and 175 N when immersed in alcohol of specific gravity 0.700.

14. ## Chemistry

If a sample of 23.0 L of NH3 gas at 10 degrees C is heated at constant pressure until it fills a volume of 50.0 L. What is the new temperature in degrees C?

15. ## Chemistry

Hydrogen bonding is strongest between molecules of (1)H2S (2)H20 (3)H2Se (4)H2Te

16. ## Physics

The intensity of an earthquake wave passing through the Earth is measured to be 2.5×106 J/m^2 at a distance of 48 km from the source. What was its intensity when it passed a point only 2.0 km from the source? At what rate did energy pass through an area

17. ## Chemistry

Which compound contains both ionic and covalent bonds? (1)HBr (2)CBr4 (3)NaBr (4)NaOH

18. ## physics

A 105-N suitcase sits on a rubber ramp at an airport carousel at a 25 degree angle . The weight vector can be broken into two perpendicular components. What is the magnitude of the component parallel to the ramp surface?

19. ## physics

An 70.0 N box of clothes is pulled 24.0 m up a 30.0° ramp by a force of 115 N that points along the ramp. If the coefficient of kinetic friction between the box and ramp is 0.22, calculate the change in the box's kinetic energy.

20. ## calculus

A stone is dropped from the upper observation deck (the space deck) of the CN Tower, 450m above the ground. (a) How long does it take the stone to hit the ground? (b) If the stone is thrown downward with a speed of 5m/s, how long does it take to reach the

21. ## chemistry

show that the mass number and the number of protons are conserved in the following nuclear equation: 234 230 4 92 U-----> 90 th + 2 he

22. ## Geography

Which items are described by the geographic theme of place? a.Australia's climate is varied; it ranges from arid to tropical. b.Australia's population is mostly English-speaking. c.Australia is an island nation surrounded by the Indian and Pacific Oceans.

23. ## Chemistry

2. Which bond is polar covalent? a) H2 b) Cl2 c) HCl d) O2

24. ## Physics

A skater spinning with angular speed of 1.5 rad/s draws in her outstretched arms thereby reducing her moment of inertia by a factor a 3. a) Find her angular speed. b)What is the ratio of her final angular momentum to her initial angular momentum? c)Did her

25. ## algebra

whom should to see at the bank if you need to borrow money?

26. ## math

An amount of \$5000 is invested at an interest rate of 7% per year, compounded quarterly. Find the value A(t) of the investment after t years.

27. ## Chemistry

A 5.0-g Sample of KBr at 25.0 degrees celsius dissolves in 25.0 degrees celsius 25.0 mL of water also at 25.0 degrees celsius. The final equilibrium temperature of the resulting soltution is 18.1 degrees celsius. What is the enthalpy of of solution in

28. ## phy

What mass of steam at 100°C must be added to 1.00 kg of ice at 0°C to yield liquid water at 15°C?

29. ## Math

Write in a standard notation: eighteen thousand and two hundredths

30. ## math

5yd 1ft 4in - 2yd 2ft 8in

31. ## physics

A 73 kg crate is dragged across a floor by pulling on a rope attached to the crate and inclined 15° above the horizontal. (a) If the coefficient of static friction is 0.52, what minimum force magnitude is required from the rope to start the crate moving?

32. ## Math

A children's game has a spinner that is equally likely to land on any 1 of 4 colors: red, blue, yellow, or green. Determine the probability of spinning a red both times on 2 spins. Explain your reasoning.

33. ## physics

A 85.0 N grocery cart is pushed 13.0 m along an aisle by a shopper who exerts a constant horizontal force of 40.0 N. If all frictional forces are neglected and the cart starts from rest, what is the grocery cart's final speed

34. ## Chem 22

balance molecular formula, total ionic formula and net ionic formula of Sr(NO3)2 + Al2(SO4)3. Thank you

35. ## college chemistry

Consider the following metals. Metal Specific Heat copper 0.385 J/(g · °C) magnesium 1.02 J/(g · °C) mercury 0.138 J/(g · °C) silver 0.237 J/(g · °C) lead 0.129 J/(g · °C) If the same amount of heat is added to 25.0 g of each of the metals, which

36. ## Chemistry

Which substance is a conductor of electricity ? (1)NaCl(s) (2)NaCl (l) (3)C6H12O6(s) (4) C6H12O6 (l) thanks for any help !

A farmer has 100 yards of fencing to form two identical rectangular pens and a third pen that is twice as long as the other two pens, as shown in the diagram to the right. All three pens have the same width, x. Which value of y produces the maximum total

38. ## math

find v for the following question.. the tip of the airplane propeller 3m long, rotating 500 times per minute (hint r=1.5m)

39. ## Math

There are 4 black marbles and 5 red marbles in a bag. If you reach in and randomly select 2 marbles, what is the probability that both are red? Explain your reasoning.

40. ## Chemistry

Explain why CH2ClBr and CH2Cl2 do not have optical, geometric, or structural isomers?

41. ## phy

A cube of ice is taken from the freezer at -7.5°C and placed in a 101 g aluminum calorimeter filled with 282 g of water at room temperature of 20°C. The final situation is observed to be all water at 16°C. What was the mass of the ice cube?

42. ## physics

100 g mass is attached to a string 75 cm long. swings in a horizontal circle. The mass goes around its path once every 0.8. seconds. What is centripetal acceleration of the object? What is the tension in the string?

43. ## chemistry

A 1-L flask is filled with 1.45 g of argon at 25 degrees C. A sample of ethane vapor is added to the same flask until the total pressure is 1.35 atm. What is the partial pressure of argon in the flask?

44. ## Pre-Calculus

. Margaret is planning to invest up to \$22,000 in certificates of deposit at City Bank and People’s Bank. She wants to invest at least \$2,000 but no more than \$14,000 at City Bank. People’s Bank does not insure more than a \$15,000 investment, so she

45. ## Calc

Use implicit differentiation to find dy/dx. ln xy + 5x = 30

46. ## physics

A 7.6 kg chair is pushed across a frictionless floor with a force of 42 N that is applied at an angle of 22° downward from the horizontal. What is the magnitude of the acceleration of the chair?

47. ## Physics

A circular saw blade rotating at 3600 rpm is braked to a stop in 6 seconds. What is the angular acceleration? How many revolutions did the blade make before coming to a stop?

48. ## english grammar

She’s liked him since six months. When you start work? I’ve been knowing her for three months i)What the mistake is. ii) Why you think it has been made. iii) How you would explain and correct the mistake with a student.

49. ## chemistry

How much energy (in kilojoules) is needed to heat 5.45g of ice from -12.0 C to 32.0 C? The heat of fusion of water is 6.01kJ/mol, and the molar heat capacity is 36.6 J/(K x mol) for ice and 75.3 J/(k x mol) for liquid water

50. ## PRE-CALC

A drug is eliminated from the body through urine. Suppose that for an initial dose of 10 milligrams, the amount A (t) in the body t hours later is given by A(t) = 10(0.8) t a) Estimate the amount of the drug in the body 8 hours after the initial dose. b)

51. ## calculus

A particel is moving with the given data. Find the position of the particle. v(t)= sin t - cos t , s(0)= 0

52. ## Physics

A ski gondola is connected to the top of a hill by a steel cable of length 720 m and diameter 1.3 cm. As the gondola comes to the end of its run, it bumps into the terminal and sends a wave pulse along the cable. It is observed that it took 14 s for the

53. ## Physics

A 100-g aluminum calorimeter contains a mixture of 40 g of ice and 200 g of water at equilibrium. A copper cylinder of mass 300 g is heated to 350 C and then dropped into the calorimeter. What is the final temperature of the calorimeter and its contents if

54. ## Fractions

My denominator is 6 more than my numerator. My simplest form is 2/5 What fraction am I?_______

55. ## physics

(A.) A hawk flies in a horizontal arc of radius 13.4 m at a constant speed of 4.5 m/s. Find its centripetal acceleration. Answer in units of m/s2. (B.) It continues to fly along the same horizon- tal arc but increases its speed at the rate of 1.45 m/s2.

56. ## chemistry

name each isotope, and write it in symbolic notation atomic number 26; mass number 56 atomic number 29; mass number 64 atomic number 17; mass number 37

2.4 X 10 to the 4th in standard form

58. ## drawing

suppose you copy a drawing of a polygon with given size factor. How will the side lengths, angle measures, and perimeter of the image compare to those of the original

59. ## chemistry

How do I determine the type of radiation that has a wavelength of 4.2 nm?

60. ## English: Shakespeare-Othello

i need help please. idont understand this question. as he enter desdemona's bedchamber in order to kill her, othello mutters: it is the cause, it is the cause, my soul. what is he talking about? in what way might he be rationalizing Desdemona's murder?

61. ## Algebra

Each ordered pair is a solution of a direct variation. Write the equation of direct variation. (2,10) (8,2) (7,21) (2,-16) Please Help!

62. ## physics

(A.) A hawk flies in a horizontal arc of radius 13.4 m at a constant speed of 4.5 m/s. Find its centripetal acceleration. Answer in units of m/s2. (B.) It continues to fly along the same horizon- tal arc but increases its speed at the rate of 1.45 m/s2.

63. ## Physics

A centrifuge rotor has a moment of inertia of 3.30 10-2 kg·m2. How much energy is required to bring it from rest to 10000 rpm? I used KE=1/2Iw^2, but that answer i'm getting is incorrect. what am i missing?

64. ## history

How did the settlement house movement differ from earlier attempts to relieve poverty?

65. ## algebra 2

identify the graph of the solution set of 8.5>6.1+0.6y

66. ## Chemistry Cell notations

Enter the balanced chemical equation including states that describes the electrochemical cell that is represented by the cell notation as shown. Pt(s) l H2O(l) l O2(g) l H+(aq) ll H+(aq), Cr2O72-(aq), Cr3+(aq) l Pt(s)

67. ## math

the short side of an isosceles triangle is 16cm long. by increasing each side length by 24 cm doubles the perimeter.how long are the other sides of the original triangle? ..

68. ## language arts

How are russell baker and snowflake bentley alike and different?

69. ## Chemitry

Nitrogen dioxide, NO2, decomposes upon heating to form nitric oxide and oxygen according to the following equation: 2NO2(g)---->2NO(g) + O2(g) At the beginning of an experiment, the concentration of nitrogen dioxide in a reaction vessel was 0.1103 mol/L.

70. ## chemistry

how many protons, electrons, and neutrons are in the following isotopes. uranium-235 hydrogen-3 silicon-29

71. ## physics

Approximate the gravitational force of attraction between a 42.0 kg girl and a 56.0 kg boy if they are sitting 3.0 m apart in physics class.

72. ## chemistry

One reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s) + 2HCl(aq) → FeCl2(aq) + H2(g); ΔH°= –87.9 kJ How much heat is liberated at constant pressure if 0.416 g of iron reacts with 42.0 mL of 0.457 M

73. ## Chemistry

Flask A contains 500 mL of water at 25 degrees Celsius and flask B contains 250 mL of water at 50 degrees Celsius. Which flask has a higher heat content? Explain your choice.

74. ## physics

A 4.5 kg bag of groceries is in equilibrium on an incline of angle θ = 55°. Find the normal force of the incline on the bag.

75. ## Statistics

Suppose that either of two instruments might be used for making a certain measurement. Instrument 1 yields a measurement whose p.d.f. is f1(x)=2x, 0

76. ## physics

A 2.2 kg purse is dropped from 55 m above before reaching the ground with a velocity of 25 m/s. What was the average air resistance.

77. ## Chemistry

Use the data given to calculate the value of delta G rxn for the reaction at 25C 2C(graphite)+H2(g)--->C2H2(g) C H2 C2H2 S(J K^-1 mol^-1)| 5.74 |130.68| 201.0 ------------------- delta H(kJ/mol) | 0 | 0 |-226.8 a.-291.4 kj b.-244.3 Kj c.-226.8 kj d.-207.6

Angle elevation of sun is 25 degrees. Find the length the shadow cast by a tree 41 feet tall.

79. ## physics

A 0.70 kg ball is moving horizontally with a speed of 8.8 m/s when it strikes a vertical wall. The ball rebounds with a speed of 3.7 m/s. What is the magnitude of the change in linear momentum of the ball? -I am not sure how to honestly to figure this one

80. ## college chemistry

The voltaic cell described by the balanced chemical reaction has a standard emf of 4.05 V. Calculate the equilibrium constant (Kc) for the reaction at 25 oC. Round your answer to 3 significant figures. F2(g) + Mn(s) → 2F-(aq) + Mn2+(aq) Mn2+/Mn -1.18

81. ## Geography

Choose the geographic theme represented below. Paraguay is a landlocked nation. It is bordered by Bolivia, Brazil, and Argentina. a.location b.human-environmental interaction c.movement d.regions please help me!

82. ## Chemistry

A covalent bond forms when (1)two nuclei share electrons in order to achieve a complete octet of electrons (2) atoms form ions and then electrostatic forces of attraction bond the ions together. (3)repulsive forces between atoms are greater than the

83. ## Calc

Locate any relative extrema and inflection points. y = (ln x)/x

84. ## MATH

HOW MANY DIFFERENT WAYS COULD THE FOOTBALL TEAM SCORE 11 POINTS

85. ## Math- HELP

There is a triangle inside of a circle. I have to find area of the shaded region which is the circle. So i would have to substract the area of the triangle from the area of the circle. the radius of the circle is 3 inches. I found the area of the

86. ## history

How did professionalization meet the needs of the developing American economy In the urban life?

87. ## physics

A skater spinning with angular speed of 1.5 rad/s draws in her outstretched arms thereby reducing her moment of inertia by a factor a 3. a) Find her final angular speed. b)What is the ratio of her final angular momentum to her initial angular momentum? c)

88. ## physics

A giant excavator (used in road construction) can apply a maximum vertical force of 2.25×105 N. If it can vertically accelerate a load of dirt at 0.200 m/s2, what is the mass of that load? Ignore the mass of the excavator itself.

89. ## MATH - PLZ NEED HELP

Jill has 4 pints of water in a 4-pint bucket. Jack has an empty 1-pint bucket and an empty 3-pint bucket. None of the buckets has measurement markings. How can they divide the water so each has exactly 2 pints?

90. ## Physics

It has been suggested that rotating cylinders about 10 mi long and 5.4 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall

how do you do these problems?? 5-26 2-2/9 8-2/3 4/3+6 But I can do these types pf problems ( don't need help with problems below) 3/4 + 1/10 and 5/6 - 1/4 Please Help!! Thanks!!!

92. ## science

unscrable the word P T T O N A D S A I A

93. ## algebra

what happened when the crossword puzzle champion died

94. ## RES342

A normal distribution has a mean of 80 and a standard deviation of 14. Compute the probability of a value between 75.0 and 90.0. a) .2022 b) .3595 c) .4017 d) None of the above

95. ## college

a certain radioactive isotope has a half life or 850 years.how many years would it take for a given amount of this isotope to decay to 70% of that amount?

96. ## Physics

What force is required to accelerate an object having a mass of 3 kg at 5 m/s2?

97. ## Algebra

Terence wants to estimate the height of a tree. He places a mirror on level ground, as shown in the picture below, and stands so that he can see the top of the tree in the mirror. Since light bounces off the mirror at the same angle at which it strikes the

98. ## physics

To balance a 40.8-kg automobile tire and wheel, a mechanic must place a 41.7-g lead weight 25.0 cm from the center of the wheel. When the wheel is balanced, its center of mass is exactly at the center of the wheel. How far from the center of the wheel was

99. ## physics

A giant excavator (used in road construction) can apply a maximum vertical force of 2.25×105 N. If it can vertically accelerate a load of dirt at 0.200 m/s2, what is the mass of that load? Ignore the mass of the excavator itself.

100. ## physics

There are two forces acting on a box of golf balls, F1 and F2. The mass of the box is 0.750 kg. When the forces act in the same direction, they cause an acceleration of 0.450 m/s2. When they oppose one another, the box accelerates at 0.240 m/s2 in the

101. ## Precal

A hot-air balloon, headed due east at an average speed of v = 14 miles per hour and at a constant altitude of h = 120 feet, passes over an intersection (see the figure). Find an expression for its distance d (measured in feet) from the intersection t

102. ## Stats and Data

Suppose that either of two instruments might be used for making a certain measurement. Instrument 1 yields a measurement whose p.d.f. is f1(x)=2x, 0

103. ## PROBABILITIES

You ask a neighbor to water a sickly plant while you are on vacation. Without water the plant will die with probability 0.7. With water it will die with probability 0.6. You are 82 % certain the neighbor will remember to water the plant. You come back from

104. ## Algebra

What is the largest perfect square that divides 64,800?

105. ## Related Rates

A ladder 10 ft long rests against a vertical wall. If the bottom of the ladder slides away from the wall at a rate of 2 ft/s, how fast is the angle between the ladder and the ground changing when the bottom of the ladder is 5 ft from the wall? Evaluate

106. ## PROBABILITIES

Factories A and B produce computers. Factory A produces 3 times as many computers as factory B. The probability that an item produced by factory A is defective is 0.037 and the probability that an item produced by factory B is defective is 0.05. A computer

107. ## help me its urgent

Consider the following student errors. After each error, state: i) What the mistake is. ii) Why you think it has been made. iii) How you would explain and correct the mistake with a student. a) I am a secretary for five years. i) ii) iii) b) I have eat

108. ## Physics

A 0.70 kg mass at the end of a spring vibrates 4.0 times per second with an amplitude of 0.15 m. Determine the velocity when it passes the equilibrium point. Determine the velocity when it is 0.11 from equilibrium. Determine the total energy of the system.

109. ## Math

Suppose that either of two instruments might be used for making a certain measurement. Instrument 1 yields a measurement whose p.d.f. is f1(x)=2x, 0

110. ## math

Find the area of each figure with the given dimensions Trapeziod: b1 = 6,b2=10, h=5 Trapeziod: b1= 4.5, b2= 8, h=6.7 I wasn't in school the day we studied this, and i am only in 7th grade!

111. ## Chemistry College

One reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s) + 2HCl(aq) → FeCl2(aq) + H2(g); ΔH°= –87.9 kJ How much heat is liberated at constant pressure if 0.416 g of iron reacts with 42.0 mL of 0.457 M

112. ## Earth Science

Describe how Earth would be different today if it contained no radioactive material. What would the consequences be for the Earth’s interior layers?

113. ## Math

cosx+cotX/secX+tanx=cosxcotx

114. ## physics

Consider a level flight turn of a propeller-driven airplane in which the airplane makes a complete circular turn in 1.6 min. If the plane's speed is 200 m/s, what is the radius of the circle?

115. ## Pre-Calculus

I want to learn how to find the domain, holes, x-intercepts, y- intercepts, vertical asymptotes, and horizontal asymptotes of a rational function. I know it is against the rules in jiskha to do the homework for the students but if I have been looking over

116. ## math

if you arrange these items into equal rows tell how many will be in each row and how many will be left over, here it is 17 ballons into 7 rows

117. ## chem

3.98mL of 2.902M HCL are reacted with 15mL of 3.198 M NaOH. Use molar heat of neutralization to determine the kJ of heat produced. molar heat of neutralization is -55.84kJ/mol.

118. ## Calc

A wire 100 inches long is to be cut into two pieces. One of the pieces will be bent into the shape of a circle and the other into the shape of a equilateral triangle. How should the wire be cut so as to maximize the sum of the area of the areas of the

119. ## physics

A 0.70 kg ball is moving horizontally with a speed of 8.8 m/s when it strikes a vertical wall. The ball rebounds with a speed of 3.7 m/s. What is the magnitude of the change in linear momentum of the ball? -I am not sure how to honestly to figure this one

120. ## chemistry

55 25Mn can be prepared by electron capture from: (a) 55/24Cr (b) 55/26Fe (c) 56/25Mn (d) 51/23V (e) 56/26Fe

121. ## Chemistry

is the lewis dot structure and a electron dot diagram the same thing ?

122. ## more gerunds (language)

The directions ask me to identify the gerund phrase. A loud knocking interrupted their dinner. Would the phrase be a loud knocking and is it used as a subject?

123. ## Calculus Help

Find the area of the region enclosed by the hyperbola x^2/a^2-y^2/b^2=1 and the vertical line through a focus

124. ## Math

A bakery makes 4 different kids of cake. Each cake can have 3 different kinds of frosting. Each frosted cake can be decorated in 2 different ways. How many ways are there of ordering a decorated, frosted cake?

125. ## Math

Tim ate some chocolate cake for an afternoon snack He left 3/4 of the cake. If his parents ate 1/3 of the remaining cake for dinner, write a multplication problem to represent how much cake tims parentd ate

126. ## algebra

Steve's mon's age is 7 years less than 3 times Steve's age. The sum of their ages is 65 years. Find their ages.

127. ## English

Can you please check these sentences for me? Thank you very much. 1)Nature is personified. 2)The humans (or people, human beings) don't have time to observe her beauty as cows an sheep do. 3) We don't have time to turn at Beauty's glance and see how her

128. ## Spanish 2

What does contesta sobre un grupo de amigos que van de camping mean?

129. ## Maths

Suppose that either of two instruments might be used for making a certain measurement. Instrument 1 yields a measurement whose p.d.f. is f1(x)=2x, 0

130. ## Math

Sam rows up a river to camp in 3 hours. The next day he makes the return trip downstream in 1 hour. If he can row 2 mph in still water, how fast is the current?

131. ## Science grd 9

Determine which appliance uses the most electrical energy: a clothes dryer that operates for 30 min/day or a freezer that operates for 24h/day. Please show work

132. ## social studies

The goal of America's containment policy was to

133. ## chemistry

is the following false the boiling point of a 0.5 aqueous solution of koh is higher than the boiling point of a 0.5m aqueous solution of kcl?

134. ## Chemistry

How can you determine if a covalent bond is polar or nonpolar? Give an example of each. thanks !

135. ## physics

When empty, a particular helicopter of mass 3770 kg can accelerate straight upward at a maximum acceleration of 1.36 m/s2. A careless crewman overloads the helicopter so that it is just unable to lift off. What is the mass of the cargo?

136. ## Math

Given any random, 3-digit number, what is the probability that a number will be: a) a multiple of 5 b) a multiple of 2 c) a square number How?

137. ## Math

There are 2 opaque bags, each containing red and yellow blocks. Bag 1 contains 3 red blocks and 5 yellow. Bag 2 contains 5 red and 15 yellow. To play the game, you pick a bag and then you pick a block out of the bag without looking. Would a person be more

138. ## American Literature

I need to provide literature allusion about Hector. and one about Paris, and one about Achilles.I am having a hard time finding similar litature characters to allude to or compare similarities. A quote about any of the three from another liturature source

139. ## chemistry

Calculate the mass of 2.56*10^24 formula units of aluminum dichromate.

140. ## Science

how could measuring the orbit of a comet help scientist understand when it will next be visible from earth

141. ## chemistry

how many more neutrons does thorium-230 have then protons? how many electrons does thorium-230 have?

142. ## RES342

A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds. What is the best estimate of the population mean? a. X=60.00 b. X=0 c. X=50.00 d. X=none of the above

143. ## trig

Find altitude of isosceles triangle if angle=53 degrees (the equal angles) and the base is 8 inches.

144. ## Chemistry

A student did not fully mix the solution of Oxalic Acid in the volumetric flask predict and explain the effect of the range of the students titration volumes when using the NaOH solution to titrate the Oxalic Acid solution

145. ## Pre-Calc

Amount after time t A (t) = yobt Where: yo = starting amount b = growth constant (percent remaining) t = number of time units It is well known that superman can withstand as much as 3 grams of Green Kryptonite indefinitely. However, exposure to more than 3

146. ## English

1. You have to study hard. 2. You don't have to study hard. 3. You have not to study hard. (Is #2 the same as #3?)

147. ## Math

Julio is testing a hypothesis than "n" stalks of corn planted together will produce(2n[second power symbol-the little 2 at the top]-2n)ears of corn. If Julio plants 6 corn plants, how many ears of corn does Julio expect to harvest?

148. ## physics

harry takes a space voyage and returns to find his twin sister has aged more than he has. This is evidence that they have been in different?

149. ## Physics

The F-14 Tomcat lands on aircraft carriers at a speed of 145 mph. The carriers capture system stops the aircraft within 2 seconds. What is the F-14's acceleration rate? in m/s^2?

150. ## Math

1. Write 6.34 x 10 to the third power in a standard form. 2. Secondly, Find the amount of rain the state of North Carliona receives each year? About how much rain falls per month? How does North Carliona's monthly rainfall compare with the monthly rainfall

151. ## calculus

At what values of x does the function f(x)= x(x-4)^4 have a horizontal tangent line?

152. ## RES342

A normal distribution has a mean of 50 and a standard deviation of 4. Determine the value below which 95% of the observations will occur.

153. ## Physics

A box slides down a 38.5° ramp with an acceleration of 1.47 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.

154. ## HISTORY

what is the official currency of the united states?

155. ## -+-+Math-+-+

Cumulus clouds have flat bases and lumpy tops. The tops are usually 1 mile above sea level. To find the height in feet of the base of a cumulus cloud, you can use the formula: height = 222 (air temperature - dew-point temperature). The air and dew-point

156. ## Algebra

What numeral is in the 100th decimal place in the decimal representation of 6/7?

157. ## Chemistry

Which bond is polar covalent? a) H2 b) Cl2 c) HCl d) O2 is it HCL ?

158. ## algebra

The length of a rectangular field is 50 meters more than twice its width. If the perimeter is 700 meters, find the dimensions of the field.

159. ## Biology

A cell that is entering the M phase of the cell cycle is: A. always diploid, either with duplicated or unduplicated chromosomes B. always haploid, always with duplicated chromosomes C. either haploid or diploid, always with duplicated chromosomes D. either

If tickets are \$.50 for children \$2.00 men \$3.00 women Explain how 100 people can purchase tickets for \$100. No money left over and at least 1 man, 1 woman, and 1 child included

161. ## algebra 2

one number is two less than a second number. If you take one-half of the first number and increase it by the second number,the result is atleast 41. find the least possible value for the second number.

162. ## Intro to Law

I need some help for a mock trial in class. I am supposed to write a direct examination for a man by the name of Farley on the plaintiff. I read on the internet that direct examinations are conducted by the attorney on the witness's side. But I also read

163. ## PreCalc

Find the standard form of the equation of the ellipse with the following characteristics. foci: (+/-5, 0) major axis of length: 22

164. ## His 135

Define the foreign policy of détente.

165. ## math

I am trying to solve using the elimanation x+y=10 and 3x-y=6

166. ## math

a student said that all squares are rectangles, but not all squares are rhombuses.What was the error??

167. ## chemistry

The element X has an atomic mass of 12.80 amu. It is known to have two isotopes 12X and 13X. Which of the following is true about the relative abundancies of 12X and 13X? a) both isotopes occur with the same frequency. b)12X occurs more frequently than 13X

168. ## physics

In moving a standard computer mouse, a user applies a horizontal force of 6.00×10−2 N. The mouse has a mass of 125 g. (a) What is the acceleration of the mouse? Ignore forces like friction that oppose its motion. (b) Assuming it starts from rest, what

169. ## Chemistry

suggest why the acetic acid concentration of a food vinegar must be known for regulatory health and saftey reasons

170. ## Precalculus

How do I solve this? 1 - 4sin^2(x)cos^2(x) = cos^2(2x)

171. ## Math

Find altitude of isosceles triangle if è=53 degrees (the equal angles) and the base is 8 inches.

172. ## English

Thank you very much for your corrections. Here are some more sentences I need to check.Thank you. 1)The Renaissance derived from the medieval background a general conception of order. The universal order was conceived in the forms of a chain of being and a

Find altitude of isosceles triangle if angle=53 degrees and base is 8 inches.

174. ## Math

Solve X=8(mod 11), X=9(mod 12), X=10(mod 13)

175. ## Math

If -2x+3=7 and 3x+1=5+y, the value of y is: A. 1 B. 0 C.-10 D.10 ????

176. ## physic

An SUV is negotiating a horizontal unbanked turn. The radius of the turn is 20m, the center of gravity of the vehicle is 1m above the ground and in the middle between the left and right side. The seperation of the left and right wheels is 1.8m What is is

177. ## Science-Chemistry

Calculate the number of grams of carbon dioxide that can be absorbed by a complete reaction with a solution that contains 5.00 grams of sodium hydroxide

178. ## Physics

Hello agein, a biger question this time. Height difference H 180 meters Flow T 3000 tons / second Delivery 4.2 GW P a) How large is the efficiency of the plant through the turbines? b) From turbine power plant goes through a cable stretch over a long

179. ## Chemistry

If a reaction takes 8 hours at 20 degrees celcius, how long will the reaction take at 50 degrees celcius? (Please answer in # of hours) A formula would be so helpful! thanks!

180. ## Chemistry

A 15.0% (by mass) NaCl solution is available.. Determine what mass of solution should be used to obtain a. 2.50 mole of NaCl b. 25.0 g/mol of NaCl

181. ## English

1. What was her character? 2. What does she look like? 3. What's her personality? 4. What is she like? 5. What is she similar to? -She was quiet and shy. (Can all the sentences from #5 to #1 be the suitable questions for the answer?)

182. ## algebra

A 400 g solution is 25% salt. How much salt must be added to produce a solution that is 40% salt?

183. ## Chemisty

PLEASEHELP i am having a major difficulty finding the answer to this question Give the balanced equation with states for both the cathode and the anode reactions of the electrochemical cell shown. Be sure to include electrons in your equations. Pt(s) l

184. ## algebra

kristyn is 4 yrs younger than mario.three years from now she will be two thirds as old as mario. find the present age

185. ## physics

If you throw a cigarette out a car window that is moving at 10 mph where will it land

186. ## biology

Which of the following is NOT a function of hormones? a. initiate behavior and reproduction b. coordinate the production and use of energy c. maintain nutrition and metabolism d. react to stimuli from outside the body B?

Select a dispute that arises in a business or commercial situation. a. What ADR process would be best suited to resolve this dispute? Explain why. b. What processes would not be suitable? Why not? Avoid selecting a dispute mentioned by other students.

188. ## calculus

Find the most general antiderivative of the function 1) f(x)= (X^3)^1/4 + (X^4)^1/3 2) f(u)= U^4 + 3ãU / U^2

189. ## his

What steps did Nixon take to open foreign relations with China? Why was this an important step in Cold War politics?

190. ## Math

how do you do these problems?? 5-26 2-2/9 8-2/3 4/3+6 But I can do these types pf problems ( don't need help with problems below) 3/4 + 1/10 and 5/6 - 1/4 Please Help!! Thanks!!!

191. ## Math

1. The problem asks:If Aaron has saved 36 sand dollars and wants to give them away equally to "p" friends, write an expression to show how many sand dollars each of Aaron's freinds will receive?(For better umderstandin may you show the correct expression

/Users/szeringue/Desktop/SCAN0001.JPG Can you help me solve this problem, Please AB=27 BC=x CD=4/3x AD=x AC=? How do I get what AC equals?

193. ## economics

Read the Case Exercise Cost Analysis (pp. 327-328 of the Textbook) - Answer the following questions: 1. Calculate the incremental, or marginal, cost per chair to Leisure Products of accepting the order from Southeast? 2. What assumptions did you make in

194. ## Biology

Please help !!!! two bacteria, "Claire" and "Bob" are infected with a virus. Claire explodes several hours later and Bob lives happily ever after.... until one day when Bob feels stressed out and all the sudden, explodes as well. What happened to bacteria

195. ## economics

Why does the Average Physical Product curve slope downwards so soon?

196. ## Algebra

/Users/szeringue/Desktop/SCAN0001.JPG Can you help me solve this problem, Please AB=27 BC=x CD=4/3x AD=x AC=? How do I get what AC equals?

On a flight with 138 passengers, each passenger had the choice of peanuts or pretzels for a snack and the coice of chicken or beef for dinner. The beverage service offered 12 beverages. A flight attendant later remarked that no 2 passengers had the same

198. ## spanish

What does Contesta sobre un groupe de amigos que van de camping mean?

199. ## history

Explain Nixon’s strategy of ending the Vietnam War using “peace with honor?”

200. ## physcience

determine the mass in grams 1.3mol of silver,Ag

201. ## Math

Ceramic tiles measure 2 inches by 3 inches. What is the least number of tiles that are needed to completely cover a square area that is 2 feet on each side?

202. ## physics

Why can't you hit a feather in mid-air with a force of 200 N?

203. ## natural sciences

Which one of the disciplines includes anthropology and education?

204. ## Emglish

Can you help me check these sentences,please? Thank you. 1)Briefly outline the main features of Wordsworth's poetry as stated in his "Preface to the Second Edition of Lyrical Ballads". 2)Answer three out of the following four questions. For each question

205. ## Calculus 1

Find the critical numbers of the function. f(x) = x^4*e^-8x

206. ## algebra

Mr. Miller says, Plan on a quarter pound of hamburger per person." There are 21 people in the class, including Mr. Miller and us." How much money should be collected for the cost of each burger in each student? if Hamburger Meat: \$1.49 per pound ( limit: 5

207. ## math

why is it possible to find the sum of the angle meanures of an n-gon using the formula (180n-360)??

the lengths of two sides of a triangle are 15in.each.the third side measures 10 in.what type of triangle is this

209. ## Chem 22

balance molecular formula, total ionic formula and net ionic formula of Sr(NO3)2 + Al2(SO4)3. Thank you

210. ## english

i need to know if i corrected these two paragraphs properly. i need to know if the sentences flow properly and if there's any errors thank you. 1. A lot of people don’t have wills. Everyone needs a will, but not all people have one. Wills are important

211. ## Geometry

/Users/szeringue/Desktop/SCAN0001.JPG Can you help me solve this problem, Please AB=27 BC=x CD=4/3x AD=x AC=? How do I get what AC equals?

212. ## Algebra

Find the value of x such that the four-digit number x15x is divisible by 18.

213. ## Pre cal

find the value of cotè given secè=5/4 and cscè

214. ## algebra

pencils are sold in packages of 5. explain why you need 6 packages in order to have enough for 27 students

215. ## Science

My mother in law falls from a 200m cliff. Answer the following. a. What is her acceleration after 2 seconds? What is her acceleration after 3 sec? b. How long will it take her to hit the ground? c. What would be her velocity right before she hit the

216. ## math

Is every square a rectangle? Is every rectangle a square?

217. ## Math

A tree casts a shadow 10 feet long. A 6-ft. man casts a shadow 4 ft. long. The triangle formed by the tree and its shadow is similar to the triangle formed by the man and his shadow. How tall is the tree?

218. ## health HCA/210

I have a 10 to 12 powerpoint slide due next week and I just wanted to get started on it. I need to explain where health insurance began, the purpose of health insurance, and I have to list the advantages and disadvantages to HMOs, Managed care, PPOs, POS,

219. ## Computers

1. There is a requirement to store 750 records. The number of buckets is 10,000. The number of slots per bucket is 3. What is the PPD? 2. Hashing Algorithm Computation The record key is 1234AB6. The number of buckets is as per the PPD computation above in

220. ## Chemistry

Explain with reference to the Nernst equation, how is it possible for a cell to have a positive cell potential understandard conditions but the negative cell potential under other conditions.

221. ## physics

A bird is flying from the ground to the top of a tree at 5 m/s at an angle of 24 degrees. What are the horizontal and vertical components of this velocity?

222. ## physics

What would be the resulting acceleration if a 7.0 kg shot put was launched with a force of 140 N?

223. ## algebra

A 400 g solution is 25% salt. How much salt must be added to produce a solution that is 40% salt?

the United States of America has 50 states.Wirte 50 as product of primes.Please help me out !

225. ## English

Posted by rfvv on Thursday, December 2, 2010 at 3:41am. 1. What was her character? 2. What does she look like? 3. What's her personality? 4. What is she like? 5. What is she similar to? -She was quiet and shy. (Can all the sentences from #5 to #1 be the

226. ## Math

Regular Pentagon side length(inches) - 6,8,10,12 Perimeter(inches) - ?,?,?,? fill in the ?

227. ## math

what is 13 and 21/20 in simples form ?

Many organizations have established policies to remedy discrimination in hiring of women and minorities. * Discuss whether or not you feel that affirmative action programs, reverse discrimination, and criteria of comparable worth are appropriate forms of

229. ## gerunds

Love is caring, and I always try to show I care. Caring is the gerund and is it used as a predicate noun? I was thinking it could also be a DO, but i'm not sure if it renames love?

230. ## RES342

Using Problem #4, what is the probability the amount requested is between \$65,000 and \$80,000? a. .4500 b. .2902 c. .5987 d. None of the above

231. ## Natural Sciences

Which one of the disciplines listed here includes journal articles as secondary sources? Natural Sciences Social Sciences Humanities More than one disciplines listed here

232. ## Chem

How many orbitals have the values n_3(n sub 3) n_3=4 and l_3(l subscript 3) l_3=3 ? How many orbitals have the values n=4, l=3, and m_l=-2? I tried 2 for this one but that is not the correct answer. Could you please help I do not know how to figure out

233. ## Physics

a boy sledding down a hill accelerates at 2.4 miles per second squared. if he starts from rest, in what distance would he reach a speed of 8.0 miles per second?

234. ## algebra

I just started learning functions and how to graph them.. but I don't know how to do this problem? x + y = 0. I wasn't sure so I put "No Solution"

235. ## physics

If you throw a cigarette out a car window that is moving at 10 mph where will it land

236. ## chemistry

how do i do this: give the number of protons, electrons, and neutrons in each of the following atoms. 108 47 Au 40 20 Ca 23 11 Na

237. ## math

a student said that all squares are rectangles, but not all squares are rhombuses.What was the error??

238. ## Algebra

Solve by the elimination process: 0.3x - 0.2y = 4; 0.2x + 0.3y = 5/23

239. ## edu 310

What are the career possibilities in the education world.

240. ## math

hy is it possible to find the sum of the angle meanures of an n-gon using the formula (180n-360)??

241. ## organic chemistry

Show the reaction equation and mechanisms of a mixture of napthalene,p-nitroaniline and benzoic acid dissolved in dichloromethane?

242. ## math

How many 2 inch squares can be placed completly on a rectangular board that is 12 inchea wide and 16 inches long?

243. ## chem

a student has to prepare 3 liters of a 1.5 M solution of C6H12 O6. What mass of C6H12O6 does she need?

244. ## Computers

1. There is a requirement to store 750 records. The number of buckets is 10,000. The number of slots per bucket is 3. What is the PPD? 2. Hashing Algorithm Computation The record key is 1234AB6. The number of buckets is as per the PPD computation above in

245. ## Precalculus

I've tried many times to get the equation to balance using trig identities like half-angle formulas, power-reducing formulas, and double angle formulas, but I couldn't get the equation to equal out. I only need to work one side to make it equal to the

246. ## Chemistry

Which compound is most polar in nature? a) CO2 b) H2O c) F2 d) NaCl i think its NaCl. am i right ?

11 -3 1/2

248. ## MATH

A CIRCULAR COFFEE TABLE HAS A DIAMETER IF 5FT. WHAT WILL THE COST BE TO BE REFINISHED IF THE COMPANY CHARGES \$3.00 PER SQUARE FOOT? A+=+pi%2Ar%5E2 r+=+2.5 A+=+pi%2A2.5%5E2 A+=+pi%2A6.25 A+=+19.635 ft2 If cost = C C+=+3%2A19.635 C = \$58.90 answer

If you have 78.1% nitrogen,20.9% oxygen,.9% Argon and small amounts of other gases Which graph type would best display the data? Line graph bar graph pie graph stem and leaf plot

250. ## geometry

Is it possible to have a quadrilateral with sides of length 10, 5, 1, and 8?

251. ## Chemistry

Okay I'm doing a lab report, and I need to find the average of two trials. Can someone show me step-by-step how do find the uncertainty for this average: (4.32g+4.17g)/2 =4.25 The values I used and their uncertainties: 4.32g +/- 0.02 4.17g +/- 0.02

252. ## Geography

for a graphic organizer about the mixed wood plains ecozone, what would the "why" and "how" parts be ?

253. ## trigonometry

equation of circle passing through P(10,3), Q(11,8), and R(7,14).

254. ## chem 121

H3PO4 is it phospheric acid or trihydrogenphosphate?

255. ## Math Hw

Completed the following table for a pentagon. Regular Pentagon side length(inches) Perimeter(inches) 6 ? 8 ? 10 ? 12 ?

257. ## English

Posted by rfvv on Tuesday, November 30, 2010 at 6:05am. 1. I cannot be an actor. 2. I am not an actor at all. 3. I cannot become an actor. (What does #1 mean? Is #1 similar to #2 or #3?) English - Writeacher, Tuesday, November 30, 2010 at 7:06am 1 and 3

258. ## Math

/Users/szeringue/Desktop/SCAN0001.JPG Can you help me solve this problem, Please AB=27 BC=x CD=4/3x AD=x AC=? How do I get what AC equals?

259. ## Social Studies

Alright, I'm writing a research paper and am so confused. My topic is on whether or not participating in music affects a students standardized test scores. I am keeping track of scores over a period of time by keeping records of students. I know this is

Scientists have calculated that the Moon's revolution around Earth is increasing by about .015 s per century. At this rate, how long would it take the length of a month to increase by one full day?

261. ## Math

Use the echelon method to solve the following system: x/5+3y=31 2x-y/5=8

262. ## math

If you have a bag of jellybeans that can be divided equally among three, five or 13 people, what is the smallest number of jellybeans the bag can contain?

263. ## Chemistry

1. Which element forms bonds with a sea of mobile electrons? a) Ca b) C c) Ar d) He

264. ## Economics

Why does the Average Physical Product curve slope downwards so soon?

265. ## Chemistry

1. Which element forms bonds with a sea of mobile electrons? a) Ca b) C c) Ar d) He

266. ## Chemistry

Which compound is most polar in nature? a) CO2 b) H2O c) F2 d) NaCl

267. ## math

use properties of parallel lines to explain which angles in a parallelogram must be congruent???

268. ## math

how do u make a rectangle with 8 tiles?

269. ## english

tell me what ares related to citing sources do you find confusing or difficult to understand or apply

270. ## Physics

A 70 kg man just before contact with the ground has a speed of 5 m/s In a stiff-legged landing he comes to a halt in 7ms (miliseconds). Keeping in mind that the average net force acting on the man includes both the force of the ground on the man and the

271. ## physics

What is the work formula

272. ## Chemistry

Convert: 5.72 kJ to kcal

273. ## Math

I am trying to figure how to solve this but I am totally confused? Can someone help explain this to me? y + x = -6 I know the formula to use is y=mx+b but just not to sure how to work the problem out so I can graph this? Have any suggestions for me? Would

274. ## organic chemistry

Show the reaction equation and mechanisms of a mixture of napthalene,p-nitroaniline and benzoic acid dissolved in dichloromethane?

/Users/szeringue/Desktop/SCAN0001.JPG Can you help me solve this problem, Please AB=27 BC=x CD=4/3x AD=x AC=? How do I get what AC equals?

276. ## Math

Would you rather take an exam that typically has an mean of 80 with a standard deviation of 3 or an exam with a mean of 80 with a standard deviation of 15? why?

277. ## algebra

Solve for x: (-1/3)(-4+3x)=1/2

278. ## US history

What impact did black voters have on the Populist Party? What impact did the Populist Party ultimately have on their black constituents?

279. ## math-rates

.....rates....6th garde.....lesson6-2 5pounds for \$2.49

280. ## math-rates

1,680 kilobytes in 4 minutes ..........how do u get it....... lesson 6-2 ......rates....6th grade pg. 289 ......#2

281. ## biology

what are the characteristics that link plants with green algae??

282. ## Math

Solve: 3(xy+2y)=

283. ## math

use properties of parallel lines to explain which angles in a parallelogram must be congruent???

so I have this problem and I don't know what numbers to multiple and whatnot. Can someone help me? This is the problem: 4000 g Fe2O3* 1mole Fe2O3/159.68 gFe2O3* 3mole CO2/1mole Fe2O3

285. ## Implicit Differentation

Find the slope of the tangent line to the curve at (2,1). x/y +x^2y^2=6

286. ## math

5x-3y=11 4x-7y=18

287. ## chemistry

apply quantum theory to explain the photoelectric effect

288. ## Calculus

Approximate the area under the graph of f(x)and above the x-axis using 4 rectangles: f(x)=x(x) +2 using 4 rectangles at intervals 0,5

289. ## 5th grade math word problem

Santa was making up a batch of dolls but could not remember exactly how many of each kind he needed. He knew that he needed 57 in total that 27 had to have blue eyes and 29 had to have fair hair. Also some had to have both features and 3 dolls were needed

290. ## chemistry

how many molecules are there in 5 moles of zinc sulfide?

291. ## english

write two paragraph explaining the changes that you would make to revise the paper.

292. ## English 227

What are your tips, tricks and help for conducting research?

293. ## English

1. Look through the book. 2. Read through the book. (Are both the same? What is the opposite of the expressions?) 3. Look the book closely. 4. Read the book closely. (Are these the opposite of the two sentences?)

294. ## bus. calculus

: intervals of increase and decrease for f(x)=(x-3)(x^2-6x-3)

295. ## Math

why is it possible to find the sum of the angle measures of an n-gon using the formula (180n-360) *degrees*

296. ## English

Look through your paper to find any small mistakes before you submit it. (What is the meanimg of 'paper' in this sentence?)

297. ## math

At what values of x does the function f(x)= x(x-4)^4 have a horizontal tangent line?

298. ## Social Studies

What are the 5 sources of power?

Solve by the elimination process: 0.3x - 0.2y = 4; 0.2x + 0.3y = 5/23

300. ## arif

when I tried to find solution of 1/(x-3) + 1/(x-9) = 1/(x-2) + 1/ (x-8) all terms of x are cancelled out why? Is there any rule to find solution of this?plz guide me.

301. ## RES342

In 1000 samples, assuming that the null hypothesis is true, how many times would you expect to commit Type I error if alpha=.05? a. 95 times b. 10 times c. 50 times d. Not enough information given to provide an answer

302. ## Pre- cal Trig

2cos^2x=cosx. Can you subtract the cos from cos^2? Or what would i have to do?

303. ## Maths

Is 9997 a prime number

304. ## statistics

with a mean of 62 and standard deviation of 12, how would you find a proportion greater than 80 and draw it on a curve?

305. ## Microeconomincs

Why does the Average Physical Product curve slope downwards?

306. ## Math

/Users/szeringue/Desktop/SCAN0001.JPG Can you help me solve this problem, Please AB=27 BC=x CD=4/3x AD=x AC=? How do I get what AC equals?

307. ## French

can you please translate this? cut peahes remove pits Get a dessert dish place peahes in them get vanilla yogurt place about one fourth in each half check up on your melba sauce get melba sauce top with melba sauce make sure it is not too hot serve

308. ## Geometry

/Users/szeringue/Desktop/SCAN0001.JPG Can you help me solve this problem, Please AB=27 BC=x CD=4/3x AD=x AC=? How do I get what AC equals?

what is the adjectives in this sentence: The runway was visible at night because it was lit very well.

310. ## College math

On a flight with 138 passengers, each passenger had the choice of peanuts or pretzels for a snack and the coice of chicken or beef for dinner. The beverage service offered 12 beverages. A flight attendant later remarked that no 2 passengers had the same

change 114/8 to a mixed fraction in simplest form

If two angles are alternate exteriors and one of them has the measure of 3x squared, and the other had a measure of 21x what are degree numbers

313. ## music

need help in describing a piece of music or a song.

314. ## Help

Fibrin is produced when the blood components called what start chain reaction

315. ## physics

how much energy does a 200kg have when it's moving at 3 m/s?

316. ## math

If the mean of a set of 36 scores is 27 and two more scores of 40 and 42 are added, what is the new mean?

317. ## Chemistry

Okay I'm doing a lab report, and I need to find the average of two trials. Can someone show me step-by-step how do find the uncertainty for this average: (4.32g+4.17g)/2 =4.25 The values I used and their uncertainties: 4.32g +/- 0.02 4.17g +/- 0.02

318. ## chemistry

how many molecules are there in 53 g of CaO ?

319. ## chemistry

If you have 18 g of Ag2O, how many moles do you have

320. ## natural sciences

Which one of the disciplines includes anthropology and education? Humanities Natural sciences Social sciences More than one of the disciplines listed here.

321. ## Math

If I were to take 2/3 of the 3/2 of the milk that was left in the fridge to make a 1/4 cup of 1/2 pound cookie dough pudding. How many frackshuns would it take to make 3/4 of 1/3 of the 1/2 sentence questions?

322. ## math

is f(x)=3x-7 a one to one function

323. ## English

1. Her first book came out in 1902. 2. Her first book was published in 1902. (Are both the same?)

324. ## science

wha t is the scrabled word , P T T O N A D S A I A

325. ## spanish 2

escribe 10 frases completas usado mandators familiares afirmatives

326. ## Europe

what is the most important advantage og having germany in the European Union?

327. ## Natural Sciences

Which one of the disciplines listed here includes case studies and synthses as types of assignments? Humanities More than one of the disciplines listed here Social sciences Natural sciences

328. ## math

what is the square root of pi?

329. ## Natural Sciences

Which one of the disciplines listed here includes essays and response statements as types of assignments? Humanities Natural Sciences Social Sciences More than one of the disciplines listed here

330. ## Ap Euro History

What is the Relative Success in Achieving Catholic/Protestant Aims when the catholics posted the 95 theses?

331. ## Natural Sciences

Which one of the disciplines listed here includes experiments as primary sources? Humanities More than one of the disciplines listed here Natural Sciences Social Sciences

332. ## Science grd 9

Calculate the cost of watching TV for 5 h at night at a rate of 8.8 cents/kW•h. The TV has a power rating of 180W. Please show work

334. ## English

I forgot to include the following statements. Thank you very much. 1)Mary I (the daughter of Henry VIII and Catherine of Aragon) repealed anti-catholic legislation and reintroduced the catholic religion. 2)Elizabeth I’s (Henry VIII and Anne Boleyn’s

335. ## math

1. Classify 4 as rational,irrational,not areal number or neither?

336. ## physics

Henry drives off a 200m high cliff at 132m/s.How far out,how far down,and how far all together did he travel in 2.6seconds

337. ## science

what's humidity ?

338. ## Math

{Hello everyone i'm back}:) I have a problem..: Kevin has 5 containers of chocolate. The first container has 110 peices of chocolate, the third container has twice as many peices of chocolate as the second container and the fourth container has half as

339. ## Math

Find the sum 1/4 + 1.5 + 2 3/4 + 2.4 + 1 1/2

340. ## math

use properties of parallel lines to explain which angles in a parallelogram must be congruent???

341. ## Pre-Calculus

It is well known that superman can withstand as much as 3 grams of Green Kryptonite indefinitely. However, exposure to more than 3 grams for more than 13 hours is fatal. Assume that Kryptonite decays at an hourly rate of 5.35% If superman is trapped in a

342. ## Math

input (f) 5,10,2,8 Output f(x) 22,47,7,37 My question is what is the rule?

343. ## Math

A bolt weights about 2/5 ounce. True or false The expression 48 divided by 2/5 could be used to find the number of bolts in a 3-pound box

344. ## Math

Can 4:3 be a ratio?

345. ## math

17 ballons into 7 rows .................... tell how many will be in each row and how many will be left over?

if james spends 5/6 of his weekly allowance seeing a movie he has how much of his allowance left

347. ## physical scenic

calculate the potential energy of 30kg box raised 2 meters above ground?

348. ## geometry

what is a set of ordered pairs that, when connected in a specific sequence, will create a convex hexagon.

349. ## Math

A bolt weights about 2/5 ounce. True or false The expresion 48 divided by 2/5 could be used to find the number of bolts in a 3 pound box

350. ## organic chemistry

How would i construct a graph of refractive index versus percent 1-bromooctane for KI and KCl reactions

351. ## marketing

is 14-pound bag of sugar is consumer or b2b good

352. ## science

how does density affect the movement of ocean water?

353. ## math

7 yd 5 yd 1 ft 4 in -3 yd 1 ft -2 yd 2 ft 8 in ----------- and ----------------

354. ## Science grd 9

The estimated average energy that I used to operate a cloths dryer for a year is is kW•h. If the average rate to operate the dryer is 7.15 cents/kW•h, what is the average cost per year.

355. ## science

how does density affect the movement of ocean water?

356. ## math

What if we don't get anything and we did so good last year is that possible and what happen I really have trouble with that?

357. ## Cultural Diversity

what is the best way to enplain orientalism and the characteristics of it?

358. ## Calc

Use logarithmic differentiation to find dy/dx. y = sq. root [(x^2 - 1)/(x^2 + 1)]

359. ## English

1. I kept myself warm. 2. I kept myself running on the playground. 3. I kept myself hidden in the closet. (Are the sentences all grammatical?)

360. ## English

1. She thinks reading books. 2. She thinks of reading books. 3. She thinks about reading books. 4. She thinks that she is reading books. 5. She thinks to be reading books. (Are they all grammatical?)

361. ## word problem

two thirds the bonus points given last week plus the quotient of 6 and the cube root of 8

362. ## Math 1

8x^7 over 9 Times 27y^2 Over 16x^3

363. ## science

WHAT IS 1 IMMOVIBLE JOINT?

364. ## college

I need three characteristics of orientalism

365. ## Natural Sciences

Which one of the disciplines listed here includes direct observations as primary sources? Humanities More than one of the disciplines listed here Social sciences Natural sciences

366. ## history

if both the president and the vice president die who assumes power?

367. ## math

7 yd - 3 yd 1 ft

368. ## Science

Does anyone know why magnet have an affect on plant's growth?

y = -x +b

5-16/3=

371. ## Macro economics

if your agency hire a consultant to develop new software programs to lease at a constant cost of \$ 1000 per year. the consultant say you can save \$ 200 per year for every computer you purchase but you will be charged \$ 100 for each harddrive you purchase .