# Questions Asked onDecember 6, 2015

1. ## Calculus

Find the surface area of the part of the sphere x2+y2+z2=81 that lies above the cone z=√(x2+y2)

27. ## math

Charlie can type faster than any of his classmates. He took a test that showed he can type 700 words in 5 minutes . How many words can he type per minute

28. ## Psychology

Erickson's theory is based on the assumption that

29. ## Science

The nitrogen cycle is carried out primarily by A.humans B.autotrophs C.bacteria D.fungi

asked by Cc griffin middle scho
30. ## chemistry

Consider the following reaction: 2 Mg + O2 → 2 MgO △H rxn = -1203 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 4 moles of Mg.

31. ## chemistry

Consider the following equation: CO + 2 H2 → CH3OH △H rxn = -128 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 8.08 g H2

32. ## Chemistry

How many grams of 10% wt BaCl2 solution will be necessary to produce 5.6g BaCl2?

33. ## math

find all solutions in the interval [0,360degrees) sin(5x)=0

34. ## math plz help!!!!!!!

which ratios form a proportion? A) 4/5 , 20/25 B) 8/12 , 18/24 C) 1/3 , 7/24 D) 2/5 , 6/16 which ratio forms a proportion with 9/15? A)3/6 B)2/3 C)12/30 D)6/10##### which proportion has cross products of 5 x 24 and 8 x 15? A)5/8=15/24 B)5/24=8/15

35. ## Biology

summarize the reproductive cycle of pines

36. ## physics

When a body hanging from a spring balance is immersed in water it floats just below the surface of water and shows 100g loss in its weight (I) what is the weight of the body in water? (Ii) what is the weight of the body in air? (Iii) what is the up thrust

37. ## Chemistry

Chart: Group, Bond length, Bond strength, H-X-H Bond Angle NH3: 1.000, 391, 107 PH3: 1.412, 322, 93.5 AsH3: 1.510, 247, 92 SbH3: 1.688, 247, 92 What physical states do these molecules exist at room temperature? Gas Briefly explain the observed trend in

38. ## Calculus

Set up a double integral for calculating the flux of the vector field F⃗ (r⃗ )=r⃗ , where r⃗ =⟨x,y,z⟩, through the part of the upward oriented surface z=9(x^2+y^2) that lies above the disk x^2+y^2≤25.

39. ## Math

The ramp shown below is used to move crates of apples to loading docks at different heights. When the horizontal distance AB is 12 feet, the height of the loading dock, BC, is 6 feet. What is the height of the loading dock DE? 10 feet 12 feet 17 feet*** 18

40. ## Math

Sam is 2 years and his mother is 28 years old. In how many years will Sam's mother be 3 times as old as he will be?

41. ## AP Macroeconomics

I got this question wrong: Which of the following best describes the relationship between bank reserves, the federal funds rate, and a decrease in interest rates for consumers and business? The answer is: If the FOMC uses monetary policy to increase the

42. ## math

For an art​ project, Marco cuts a 12 and two thirds ft piece of string into 8 equal pieces. How long is each​ piece? Maria cuts her string into 8 equal pieces of length 2 and seven twelfths ft. Which student started with the longer piece of​ string?

43. ## English

1. He set the table for dinner. (Does 'for dinner' modify 'the table' or 'set'?)

44. ## Economics

Initially suppose that both countries have the same production function, namely q = K.3L.7. For this production function, MPL = .7K.3L-.3 and MPK = .3K.-7L.7. Derive (with all steps shown) the long-run total cost function for each country. (Given that both

45. ## Introduction to Terrorism

What then, is to deter individuals and nations from engaging in this high-profit, low risk warfare?

46. ## calculus

what point of f(x)= e^(1-x^2) is concave down? I think it is 1/2 but I'm not sure

47. ## Biomechanics

Person A: Weight: 1200 N Net Impulse for counter movement jump: 240 Ns Person B: Weight: 800 N Net Impulse for counter movement jump: 160 Ns 1) Which person jumped highest? 2)What was kinetic energy of each person right before they left the ground? 3)What

48. ## algebra

A marketing department estimates that demand for a product is given by P=100-0.0001x, where P is price per unit and X is number of units. The cost C of producing x units is given by C=350,000+25x And the profit P for producing x units is given by P=

John is at a car show. Beginning 2.5 miles away, a car travelling at a constant 45 miles per hour approaches and then passes John. The distance between John and the car can be represented by the equation d = |2.5 – 45t|. At what times is the car 0.5

50. ## phicis

A string of mass 10.0 grams and length L = 3m has its ends tied to two walls separated by distance D = 2m. Two masses of 2 kg each are suspended from the string as shown in the figure. If a pulse is sent from Point A, how long does it take to travel to

51. ## chemistry

a gas has a volume of 95 mL at a pressure of 930 torr. What volume will the gas occupy if the pressure is increased to 970 torr and the temperature remains constant

52. ## Physics

A steel bar has an initial length of 40 meters when the temperature is 20 oC. At what final temperature will the steel bar have a final length of 40.01 meters? The coefficient of linear expansion of steel is 12E-6 (1/C).

53. ## music

what song has 15 tone color?

54. ## Chemisty

Antifreeze is made by mixing equal volumes of ethylene glycol (d=1.114 g/mL) and water. The resulting solution has a density of 1.040 g/mL. Calculate the antifreeze molarity, molality, mole fraction, mass percent, and volume percent.

55. ## Math

Arianna is taking care of her uncle's dog during the week. He left 3 cans of food for 5 days. How much good should she give each day assuming the dog eats exactly the same amount each day

56. ## Chemistry

Sodium chloride dissolves in water (solubility in water is 361g/1L), but copper (II) phosphate does not dissolve in water (insoluble). A. Describe in a stepwise fashion how the solid sodium chloride dissolves in the water to form a solution. (name the

57. ## math

sum of Rs.7700 is to be dividedamong three brothers Zain, Zaid and Zoaib in such a way that simple intereston each part at 5% per annum after 1,2 and 3 years, respectively remains equal. The share of Zain is more than that of Zoaib by?

79. ## chemistry

Help me solve it. Step by step please The value of kp at 20°c for the reaction 2NO(g) +Cl2(g) 2NOCl(g) is 1.9x10^3 atm-1 calculate the value of KC at the same temperature.

80. ## Chemistry

Let us assume that Cu(OH)2(s) is completely insoluble, which signifies that the precipitation reaction with NaOH(aq) (presented in the transition) would go to completion. If you had a 0.300 L solution containing 0.0230 M of Cu2+(aq), and you wished to add

81. ## Chemistry (Check and Help)

Hey can you please check my answers? Also, Can you explain interparticle force of attraction? I'm not sure about the difference between IMFOA and IPFOA. Chemical formula: Cl2 Name: Chlorine Bond Type (intermolecular FOA): London VSEPR molecular shape:

82. ## Algebra

A large screen at a theater measures 65 feet diagonally. The aspect ratio (width compared to height) of the screen is 21:9. What is the approximate width and height of the screen?

83. ## Chemistry

Can pi bonds be made from d-orbitals?

84. ## Chemistry

Calculate the frequency of light associated with the emission from n=5 to n=4 in the hydrogen atom. I got -7.41 x10^13 Hz, but the answer would make sense if it is positive... So does this mean that when the electrons jump from n=5 to n=4, energy is

85. ## English

Hello. Please help me to check the sentences: 1) His sister or his brother hasn't any bank accounts. 2) His sister and his brother haven't any bank accounts. Thank you for your help.

86. ## physics 20

What is the true weight of a 60-kg astronaut on: a) the surface of Mars? b) the surface of Saturn? given: mass of Mars= 6.42x10^23 mass of Saturn= 5.69x10^26

87. ## Chemistry

Name the compound or give molecular formula. 1. Pt(NO2)2 : ? Is it Platinum (II) Nitrite 2. Manganese (II) bromide pentahydrate:? Is it MnBr2 • 5H2O

88. ## L.A

Think about the work you completed in your reading character role. Determine the ideas that would be most worthy to share in a literary discussion about Johnny Tremain. Provide an explanation for your choices. How did the role you selected and the work you

90. ## Critical Thinking

Consider the following conductive argument: P1. Critical thinking teaches the fundamentals of good reasoning. P2. Critical thinking helps people learn how to detect bad reasoning in the arguments they hear and read. P3. Critical thinking principles

91. ## 8th Grade pre Algebra : HELP!

I usually don't post questions on here but Hell, I mind as well go for it. I was sick and now I'm behind, confused, and failing so any help is much appreciated. 3. Which number is equal to 5^3? A. 15 B. 100 C. 125 D. 150 4. What is the squaee root of 25/64

92. ## Ap physics

fine sand moves through pipes just like fluid. a sandblasting machine moves fine sand through a pipe of inner diameter 2.8 cm at 75L/minutes. the sand comes out from two identical jets at speed 45 m/s. calculated the diameter of the holes through which the

93. ## Chemistry (Check)

Which of the following exhibits the highest boiling point? a. Ne, Ar, Kr, or Xe? Xe b. HF, HCl, HBr, or HI? HI c. CH3CH3, CH3COOH, or CH3OCH3? CH3COOH d. F2, Cl2, Br2, or I2? I2 e. NaCl, SO2, or N2? SO2 Are these right? I just went by molar mass. If these

94. ## Kenya water

Find the area of the region bounded by the curves y=xsinx and y=(x-2)^2

95. ## Kewi

Find the mean heights of the curve y^2=2x between x=1 and x=3

96. ## Chemistry

In a moist room (44m3) 4 kg dry CaCl2 is placed. The room contains 10 g/m3 of H20. How much of the CaCl2 is converted to CaCl2*2H2O? Temperature 10 deg C. Equilibrium constant is 10^5 atm-2 at 10 deg C. I've caclulated Kp to 0,0032 atm and then tried to

97. ## English

What is the Supporting Sentence of the topic Sentence I like to collect coins (or anything else that you like ? what is the Suppprting sentence of the topic sentence This weekend i will help my parents do some household chores ?

98. ## Math

Find the inverse of f(x)= 3x. I believe the answer is: 1/3x= y f(x)=3x and g(x)=3x y=3x x/3= 3y/3 1x/3=y

99. ## maths

the ratio of total surface area to the curved surface area of a right circular cylinder is 3:2 find the volume if its total surface area is 14784 cm2

100. ## Quick Question

Were African Americans allowed to vote during the 1960's? I just need a simple yes or no.

101. ## Science

The mass of a baggage loaded truck and the mass of one bag are given . Now what will be the number of bags?

102. ## Mathematics

The width of a rectangle is 20m less than twice its length. If the perimeter of the rectangle is more than 56m, find the minimum dimensions of the rectangle if each dmension in meters is an integer.

103. ## trigonometry

Find the length of the arc intercepted by the angle 50-degree inch in a circle of 6m

104. ## Critical thinking

How do I determine if an inference is inductively valid or not?

105. ## Language Arts

Are these right? My aunt discovered a skunk under her porch and called the Humane Society for help in removing it. *simple sentence Some committee members preferred either a musical comedy or a mystery. *simple sentence

106. ## Physics

Some bags (the mass of each bag is 50 kg) are put in the truck of 200 kg mass. After applying 400 N force the car started moving with 1 m/s accelaration.Now my question is'', how many Bags are in the truck?

107. ## gk

2/3 OF STUDENTplay piano 1/2 of the students who play the piano also play the violin 1/4 of those students also play flute what fraction of students plays all three instruments

Find the point of intersection of the lines 3x+2y=15and7x-3y=4

109. ## Math

What are three numbers that have a sum of 35 if the greatest number is 14 more than the least number?

110. ## chemistry

A pound of coffee beans yields 56 cups of coffee (4 cups= 1 qt.) how many milliliters of coffee can be derived from 2.2g of coffee beans?

111. ## Philosophy

If you have a inductive argument, and you're evaluating if the conclusion is valid or not, if you can figure out a different conclusion is it valid or not?

112. ## chemistry

What is the enthaphly change when 2 moles of fe(111)oxide is reduced by 3 moles of aluminium ♢Hf Al2O3= -1676kJ mol-1 ♢Hf (Fe2O3)= -825kJmol-1

113. ## French

How do you say "It's right there in front of you" in French?

114. ## English

Can you please check my answers? 1. Throughout the night the security guard walked from store to store. Subject: guard Verb: walked Prepositional phrase: throughout the night, from store to store 2. The meeting concerning the new town hall met at the

115. ## physics

Two plus lenses have focal lengths in the ratio 7:1. When placed together in close contact the focal length of the combination is +12.5cm. What are the focal lengths of the two lenses?

116. ## I can

Timothy has a piece of fabric that is 7 yards long. he cuts the fabric into 8 equal pieces.

117. ## Math

Hey can someone review my math and see if i did it correctly? The math question is: Choose one product from your business and determine the markup and gross profit for it. Assume that the retail price of the product is $85, the cost is$47, and the

118. ## Exo and Endo

D. What tests and observations should be conducted after the reaction to determine if new substances are formed? I am working on a project called Exothermic and Endothermic Reactions….I need help please!

119. ## Math

The hot air balloon operator allows the balloon to descend at a rate of 23 ft per minute. If they have been descending for 6 minutes how far has the balloon descended?

120. ## Maths

The mean of these 8 numbers is 9 and their range is 8. What are the 2 missing numbers 6,11,9,7,8,13,?,?

121. ## Science

A spring scaled is used to measure the weight of a object on the earth. The scale on the moon would read what?

122. ## Computer Science

Write a flowchart of a program for first n even number

123. ## Algebra 1, Physics

Muriel and Connie are playing a game of catch. They decided it would be fun to stand on different sides of the building and throw the ball back and forth. Muriel can throw the ball with a velocity of 14 m/s, and Connie can throw with a velocity of 16 m/s.

124. ## mechanics

A man begins to climb up a 12-ft ladder . The man has mass 80 kg, while the ladder has mass 10 kg. The wall against which the ladder rests is very smooth, which means that the tangential (vertical) component of force at the contact between ladder and wall

125. ## AC circuits

_____R____________ | | | |+ | XC E1 XL | |- | |+ | | E2 ___________________- Z1 = R= 4 ohms

126. ## mnps

A tailor had 10 m of cloth. He used 2 m 40 cm and 2 m 60 cm to make two shirts. How much cloth was left?

127. ## physics

1) A 70 kg woman dives from a 2.5 m high diving board. The gravitational field strength is 10 N/kg. Describe whether she gains or loses gravitational potential energy, and calculate the change in gravitational potential energy

128. ## Government

To what extent is affirmative action used today?

129. ## Chemistry

150 g of water at 80 degree Celsius is cooled to 50 degree Celsius how much heat is lost bye the water

130. ## Humanities

Having trouble answering these questions, about John Kani's film (Nothing but the Truth). 1. How does Mda see memory and identity as being linked? How is this reflected in Kani’s play? 2. How does the play mirror the intentions and role of the Truth and

131. ## algebra

A piece of ribbon 3 1/4 ft long is cut from a 8-foot roll of ribbon. how much ribbon remains on the roll?

132. ## Government

Why is due process a cornerstone of the judicial system?

133. ## st. Anthony's school

A compound amongst BcL3,alcl3,fecl3,pcl3 which cannot act as lewis acid

134. ## Chemistry

A compound that you are studying is soluble in CCl4 but not in water. Would you predict that the compound is polar or nonpolar? Why? [Please explain; don’t just give a trivial answer such as “Because like dissolves like”.]

135. ## Chemistry

How many grams of cesium chloride (CsCl) will be needed to make 750. mL of a 0.100 M CsCl aqueous solution? The formula mass of CsCl is 168.36 g/mol. Remember Molarity: M = (mol solute) / (L of solution) I need help solving this problem

136. ## Earth science

According to the suplimentary demands the price you pay for a product is determine both by its availability and by consumer demand for the product. On the basis of the principle, which mineral do you think have a higher value, iron containing mineral or

137. ## Finance

Currently you own a portfolio comprised of the following three securities. How much of the riskiest security should you sell and replace with risk-free securities if you want your portfolio beta to equal 90 percent of the market beta? Stock Value/Beta A

138. ## math

Find the x value for all maxima and minima of f(x) if: f'(x)=(x-7)(x+3)(x-8)^2(x+27)^3

139. ## chemistry

How to solve this problem in counting atoms 2 pb(CN)2

140. ## math

In a shower 5cm of a rain falls. Find the volume of water on 2 hectares of land.

141. ## geometry

Let $\overline{PQ}$, $\overline{RS}$, and $\overline{TU}$ be parallel chords of a circle. The distance between chords $\overline{PQ}$ and $\overline{RS}$ is 4, and the distance between chords $\overline{RS}$ and $\overline{TU}$ is also 4. If $PQ = 78$ and

142. ## Chemistry

Can pi bonds be made from d-orbitals?

143. ## Introduction to Terrorism

Will terrorism become the accepted method of warfare in the future for the disenfranchised and alienated peoples?

144. ## Introduction to Terrorism

Can you explain why some countries see terrorism as having appealing attributes as an instrument of war?

145. ## Applied Calc

Find the indefinite integral of x^4/1-x^5dx. so far, I have these steps: ∫ f'(x)dx = ∫ x^4/1-x^5dx Let u=1-x^5 du= -5x^4 ∫ u^-1*-1/5du (but I'm not sure if you can technically do -1/5du? this is where I'm getting lost. please help!!)

146. ## Chemistry

34.09 ml of 0.251 M KOH is required to tritate a 10.2951 g sample of acetic acid solution. The density of the solution had been previously found to be 1.007g/ml. what is the molarity of the aetic acid solution?.

147. ## Math HELP!

How do you subtract fractions? I don't get it.

148. ## chemistry

how many joules are needed to completely melt 25 grams of ice at 0 degree celcius?

149. ## algebra 2

Kate can row a boat 10 miles per hour in still water. in a river where the current is 5 miler per hour, it take her 4 hour longer to row a given distance upstream than to travel the same distance downstream. Find how long it takes her to row upstream, how

150. ## math

A rounded number for the speed of an insect is 5.67 per second. What are the fastest and slowest speeds to the thousandths that could round to 5.67 meters per second?

151. ## time

an airplane is traveling at 550km/hr. how long does it take to cover 15 km

152. ## English

Directions: Identity the participle or participle phrase and the words that they modify: The horseman is the ghost of a beheaded soldier who appears at night. I am thinking beheaded is the participle that modifies the soldier or is it a phrase beheaded

153. ## Math

if f(1)=10 and f'(x)>=2 for all x in the domain 1

154. ## vocabulary eng

looking for a simple way to explain the differnce between inexorable and obdurate inexorable - unyielding stubborn unalterable obdurate - stubbornly persistant Please do not send me a link - I need help in understadning differnce not in a definition.