# Questions Asked onMarch 7, 2013

1. ## Physics

A 50.0g ball of clay traveling east at 3.00 m/s collides and sticks together with a 50.0g ball of clay traveling north at 3.50m/s. What is the speed and direction of the resulting ball of clay?

2. ## Cal 1

Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) (1 + 2x)^1/4 ≈ 1 + 1/2x

3. ## chemistry

copper compounds such as copper (II) sulfate are toxic. before disposal, these compounds must be treated to reduce their toxicity. describe how to use steel wool to remove the Cu 2+ ions from an aqueous solution of copper (II) sulfate

4. ## Chemistry

What will happen if a small amount of hydrochloric acid is added to a 0.1 M solution of HF? A) The percent ionization of HF will increase. B) The percent ionization of HF will decrease. C) The percent ionization of HF will remain unchanged. D) Ka for HF

5. ## Algebra

Find the balance in the account, 4,000 principal earning 6% compounded annually after 5 years.

6. ## Math for Ms. Sue please!

1. Name the solid with the description as a figure that has one base that is a rectangle and four lateral surfaces that are triangles. (1 point) triangular pyramid cone rectangular prism rectangular pyramid 2. A solid with two parallel and congruent bases

7. ## Math

Graph 4x2 + y2 = 9. What are its lines of symmetry?

8. ## Chemistry

When a diprotic acid, H2A, is titrated by NaOH, the protons on the diprotic acid are generally removed one at a time, resulting in a pH curve that has the following generic shape. (a) Notice that the plot has essentially two titration curves. If the first

9. ## physics

A flight attendant pulls her 70 N flight bag a distance of 253 m along a level airport floor at a constant speed. The force she exerts is 40 N at an angle of 53° above the horizontal A) Find the work that she does on the flight bag B) Find the work done

10. ## Physics

A thundercloud has an electric charge of 43.2 C near the top of the cloud and -38.7 C near the bottom of the cloud. The magnitude of the electric force between these two charges is 3.95x10^6 N. What is the average separation between these charges?

11. ## History help: check answer

5. What issue led to the construction of the Berlin Wall? A.) new American intervention in Europe *B.) Soviet attempts to control all of Germany C.) the removal of U.S. troops from Berlin *D.) U.S. refusal to recognize a divided Germany Not sure if it's B

12. ## Life orientation

Name four innovative strategies to counteract possible unemployment

13. ## not sure where to begin

In what ways is your standard of living different from that of your parents or grandparents when they were your age? Why have these changes occurred ?

14. ## math

two systems of equations are giving below for each system choosethe best description of its solution if applicable give solution x+4y=8 -x-4y= -8 choose which one this problem fit in 1)the system has no solution 2) the system has a unique solution (x,y)=

15. ## Chemistry

A 50.0 mL sample of 0.10 M pyridine, C5H5N, is titrated with 0.2 M HBr. Calculate the pH to one decimal place when the following volumes of titrant have been added. 0.00 mL a) 0ml b)17ml c)25ml d)40ml

16. ## math

Cinema 2 has 25 seats in the first row and 30 rows in all. Each successive row contains one additional seat. How many seats are in the theater

56. ## chemistry

For each of the following reactions, predict whether the equilibrium lies predominantly to the left or to the right. HCN(aq) + SO42-(aq) CN -(aq) + HSO4-(aq) I think it has something to do with the Ka but im not sure!

57. ## physics

when inflated, a rubber lifeboat takes the form of rectangular box of dimensions 2mx1.5x40cm. with out any load, it floats. how many 60kg people can it carry before water flows into it? assume that the density of seawater is 1025g/cubic meter.

58. ## Algebra 1

A ball is thrown upward with an initial velocity of 35 meters per second from a cliff that is 80 meters high. The height of the ball is given by the quadratic equation h = -49t^2 + 35t + 140 where h is in meters and t is the time in seconds since the ball

59. ## Physics

Two flat surfaces are exposed to a uniform, horizontal magnetic field of magnitude 0.79 T. When viewed edge-on, the first surface is tilted at an angle of 26° from the horizontal, and a net magnetic flux of 9.2 x 10-4 Wb passes through it. The same net

60. ## Management for Organizations

Would someone PLEASE check my answers..THANKS in advance!!! 1. Employee inventories and skills inventories are strategies for ________________________. (D) job design promoting-from-within external recruiting human resource planning 2. Which one of the

79. ## EMS

mention and define any five concepts for each of the following subject,accounting;economics and business studies?

80. ## Algebra 1

2k^2-13k-24 Factor the expression..

81. ## social studies

americans are united by the strong belief in basic principles.what are they?

82. ## Chem

if 15 g of nitrogen reacts with 15 g of hydrogen, 10.5 g of ammonia is produced. what is the percent yeild of this reaction?

83. ## Cal 1

Find the linearization L(x) of the function at a. f(x) = x^4/5, a = 32

84. ## physics,dynamics

The acceleration of a particle along a straight line is defined by a = (2t - 9) m/s2, where t is in seconds. At t = 0, s = 1 m and v = 10 m/s. When t = 9 s, determine (a) the particle’s position, (b) the total distance traveled, and (c) the velocity.

85. ## Algebra

The difference of the cubes of two consecutive odd positive integers is 400 more than the sum of their squares. Find the sum of the two integers.

86. ## math

A ball is thrown upward with an initial velocity of 35 meters per second from a cliff that is 80 meters high. The height of the ball is given by the quadratic equation h = -49t^2 + 35t + 140 where h is in meters and t is the time in seconds since the ball

87. ## math

solve the system of equations in three variables -3x+y-z=-10

88. ## Physics/mats

Two blocks with masses m1 = 1.40 kg and m2 = 3.00 kg are connected by a massless string, as shown in the Figure. They are released from rest. The coefficent of kinetic friction between the upper block and the surface is 0.390.In the figure m1 is on top of

89. ## Meteorology

Does the Sun's rays ever make 90- degree angles to the Earth's surface in San Francisco at any time during the year? Why or why not?

90. ## Geometry

The sum of four numbers is 771. The ratio of the first to the second is 2:3. The ratio of the second to the third is 5:4. The ratio of the third to the fourth is 5:6. Find the second number.

91. ## Social Studies

I need some help determing what ocean Australia is located in. The question on my study guide says, "Australia is located in the southeast __________ Ocean. I see it is surrounded by the Southern Ocean, Indian Ocean, and Pacific Ocean. I'm not sure which

92. ## Social Studies

I need some help determing what ocean Australia is located in. The question on my study guide says, "Australia is located in the southeast __________ Ocean. I see it is surrounded by the Southern Ocean, Indian Ocean, and Pacific Ocean. I'm not sure which

93. ## Physics

A roof tile of 0.2kg drops 10m from the top of the building to the ground if a tile falls with a uniform velocity calculate its k.E as it stricks the ground using kinematic principle

94. ## Check my physics

Would you mind checking one of my problems from my physics study guide? I know the answer and just want to make sure I am using the right formula. :) A 78-kg skydiver has a speed of 62 m/s at an altitude of 870 m above the ground. a. Determine the kinetic

95. ## chemistry

the reaction between H2 and O2 reaches equilibrium in a closed container according to the following balanced equation: 4HCl+O2=2H2O+2Cl2 the volume of the container is 5dm3 calculate the equilibrium constant (Kc) for this reactin

96. ## Social Studies

I know the higher the literacy rate the higher the GDP and standard of living in a country. I'm having trouble with a study question though on how can a country increase their literacy rate. Thanks.

97. ## chem30

what is the molar enthalpy of combustion for magnesium? calimetry experiment results 100.0ml of HCl with 0.31g of Mg ribbon temp before ribbon added 23degrees and after ribbon added 37degrees. Need to show work so I understand. q=mcdeltaT

98. ## Statistics

Find the 35th percentile of the normal distribution with mean 270 and SD 25.

99. ## Statistics

The 60th percentile of a normal distribution is 110. The 70th percentile is 120. Find the 90th percentile.

100. ## chemistry

When 5.00 grams of copper racts with excess silver nitrate, silver metls and sopper nitrate are produced. What is the theoretical yeild of silver in this reaction? please give step by step help

101. ## Calculus

Given that \displaystyle \int_0^4 x^3\sqrt{9+x^2} dx = a, what is the value of \lfloor a \rfloor?

102. ## Basic Math Venn Diagram

Hi! Having a lot of trouble with this one problem. The venn diagram problem is n(U)-n(B). I realize I did not post the venn diagram, I just need to know how to solve that type of problem using a venn diagram! Help would be greatly appreciated. : ) Thank

103. ## chemistry

Calculate the pH of a 195 mL solution containing 7.50g of ethylamine (CH3CH2NH2) and 7.50g of ethylammonium bromide (CH3CH2NH3+ Br-). The Kb of ethylamine is 4.7 x 10-4

104. ## English

Write the verb that agrees with the subject of each sentence below 1. Land and water ___ drawn to scale on a globe (is are) is 2.On a globe or a map an inch or a centimeter ___ for a much larger unit of measurement (stand stands) stands 3.Neither these

105. ## Algebra 1

6t^2+21t-12 Factor the expression I don't know how to figure it out

106. ## language

How do you diagram this sentence. Don't fall off the bench.

107. ## math Asap

NAME the Property of Multiplication used at each step to simplify the equations. For each a b and c A. (4)(0.25)(3.7) B. (1)(3.7) C. 3.7

108. ## Physics

A 7.00 x 10 -5 H solenoid is constructed by wrapping 66 turns of wire around a cylinder with a cross-sectional area of 6.2 x 10-4 m2. When the solenoid is shortened by squeezing the turns closer together, the inductance increases to 8.40 x 10-5 H.

109. ## Chemistry

Mercury dissolves in concentrated nitric acid, with the evolution of a reddish-brown gas, just as in the reaction shown in figure 5.4 on page 188 for copper. The oxidation state of the mercury after reaction is +2. Write a balanced net ionic equation for

110. ## English

select an object from starry night and write sentences in which you personify that object what does that mean ?

111. ## Interpersonal Communication COM200

How do all these concepts relate to interpersonal communication? Also, give an example of how your “self-concept,” “self-image,” or “self-esteem” has affected your interpersonal communication. How do self- concept, self- image, and self- esteem

112. ## Maths

Prove that the triangle formed by the points of contact of the sides of a given triangle with the excircles corresponding to those sides is equivalent to the triangle formed by the points of contact of the sides of the traingle with the inscribed circle

116. ## Chemistry

How many grams of NH4Br(Molar Mass=98g)are in 440.0 mL of 1.75Moles NH4Br

117. ## Physics

A ball of mass 0.3 kg, initially at rest, is projected from ground level toward a wall that is 27.0 m away. The ball's velocity the moment it is projected is 75.0 m/s at 60° relative to the horizontal, and the wall is 11.0 m high. During its flight, the

118. ## Chemistry

What is the pH of a 0.77M solution of methylamin at 25 degree C? CH3NH2, Kb= 4.4X10-4? How do I set this up to get the answer?

119. ## automotive repair nd maintenance

how does the two stroke internal combustion engine work...plz explain it....

120. ## Physicis

The gravitational force between two objects is 2,000N. They are moved so that the distance between them is four times the original distance. What is the new force between the objects?

121. ## physics

A 445 g sample of ice at -58CENTIGRADE iS HEated until its temparature reaches -29 centigrade.find the change in heat contend of the system.

122. ## chemistry

how do i balance SO3 + H2O = H2SO4

123. ## Math

A 6 ft person has a shadow 5ft long. A nearby tree has a shadow 30ft long. How tall is the tree?

124. ## Comma help

Choose the option that corrects the sentence below. If the sentence is correct, select “d. The sentence is correct.” Commander-in-Chief Sam Houston defeated the Mexican army and captured Santa Anna in 1836 A Commander-in-Chief, Sam Houston, defeated

125. ## geometry.

In the diagram, a trapezoid is shown with x=36 and y=56. Find the area of the trapezoid. It's an isosceles triangle with base angles of 60°.

126. ## Physics/math

A block with mass m = 16.1 kg slides down an inclined plane of slope angle 24.3o with a constant velocity. It is then projected up the same plane with an initial speed 3.35 m/s. How far up the incline will the block move before coming to rest?

127. ## English

1.Rob or Fred ____ basketball after school. (plays play) plays 2.The teacher or the students ____ the display to visitors. (explain explains) explain 3.Neither Grace nor Kirk ___ the name. (remember remembers) remember 4.A laboratory and an office ____ on

128. ## Science

In an atom, electrons ____. are located in the nucleus are paired with neutrons are located in the electron cloud are always in the same place

129. ## edu

7.Which one of the following conditions Fails to foster good communicative interaction in an early learning setting? a. The teacher repeats every thing a child says, but in the proper English form. b. At least during the time the child is in the early care

130. ## Algebra

Simplify (x-7)( x+7)

131. ## edu..help ms sue

A young Asian child would probably be less inclined to engage in backchanneling than a middle-class American child does because: a.he or she incorporates both verbal and nonverbal responses b.middle-class children are taught and expected not to engage in

132. ## Chemistry

A 1.00 kg gold bar at 1010 K is dropped into 0.750 kg of sand at 25 °C. Assuming no heat is lost to the atmosphere, what is the final temperature of the sand?

133. ## Maths

A farm rears 9 ducks and cows in his farm. There are 28 legs altogether.How many ducks are there in the farm?

134. ## Chemistry

The molal freezing point constant(Kf) for acetic acid is 3.90 C/m. When 31.5 grams of unknown solute is dissolved in 650 grams of acid the freezing point is lowered by 0.79 what is the molar mass

135. ## PHYSICS

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #6: A 30 kg kid on rollerskates is moving 1 m/s. His

136. ## Health

What are the social effects on you and your family if you abuse the drug LSD?

137. ## Biology

Which of the following bond types is Testosterone capable of forming with a suitable partner molecule? Indicate your answer by checking "Yes" or "No" as appropriate. Hydrogen Bond Ionic Bond van der Waals forces As a whole, is the Testosterone molecule: -

138. ## Math

If you have 36ft of fencing what are the areas of the different rectangles you could enclose with the fencing? Consider only whole number dimensions.

139. ## plus 1-chemistry

calculate the mass of caco3 required to librate 10l of co2 at stp?

140. ## Chemistry

These blanks I REALLLY need your help. Our teacher gave the teaching job to this other I think coop student who wants to be a teacher to teach for a day but I| seriously don't understand anything she said..in short I don't have anyyy clue about this. So

141. ## Derive

Find the derivative of sin(2x + 3y)= 3xy + 5y-2. I have this so far 1) cos(2x+3y) * d/dx (2x+3y)= 3xy' + 3y + 5y' 2) cos (2x+3y) * [2 + 3y']= 3xy' + 3y + 5y' 3) 3y' cos (2x+3y) + 2cos(2x+3y)= 3xy' + 3y + 5y' 4) 3xy' + 5y' - (3y(cos(3x+3y)= 2 cos (2x + 3y)

142. ## Physics

During a 74-ms interval, a change in the current in a primary coil occurs. This change leads to the appearance of a 4.6-mA current in a nearby secondary coil. The secondary coil is part of a circuit in which the resistance is 12 Ù. The mutual inductance

143. ## English

Write ten sentences about different people places or things. Begin each sentence with a compound subject. Make sure the compound subject and the verb agree. 1.My friend and I go to the park on the weekend. 2.Lance and Darren don't want to go to the party.

144. ## Physics

You launch a model rocket up into the sky. Right after launch the rocket is accelerating upwards at 10~m/s^2. What is the magnitude of the net force in Newtons on the rocket if the rocket has a mass of 0.1 kg?

145. ## physical

Suppose a sound of frequency 1200 Hz is emitted from a speaker 15 meters away from you. At YOUR location, the intensity is 1.0E-7 W/m2. Let me assume your eardrum has area 3E-5 m2. If the sound continues for 8 seconds, what total amount of energy is

146. ## Math Pre Cal

Find the values of the trigonometric functions of è from the information given. cot è = 1/2 , sin è < 0

147. ## science

How do blood O2 levels, CO2 levels and PH effect ventilation? Where are the receptors that monitor blood gases located and what do these receptors actually respond to? What blood gas is most closely monitored by the body? Given what you know about blood

148. ## Algebra

what is the smallest positive integer N such that 13^N \equiv 1 \pmod{2013}

149. ## Algebra

Alan and Bob are playing with numbers. Starting with the number n=1 they take turns performing arithmetic manipulations with n. Alan goes first and always multiplies n by 3. Bob adds 1 or 2 to the number n, depending on a coin toss. A number is called

150. ## Math (immediate help, please!)

A bicycle has 26-inch diameter wheels. If the wheels revolved 2 times after the brakes were applied, the stopping distance is approximately _____. What's the answer? Provide a thorough explanation as well, please.

151. ## Physics

I'd like to know when it is appropriate to use each formula. Im new to studying physics and its seems that there are certain situations when one formula leads to the answer, yet a derivative of that formula that should lead to the answer is incorrect. For

152. ## Science

Why can the electronic configuration of some transition element not be written like this;Mg=(Ne)3s2

153. ## Geometry

What is the minimum distance between any point on the circle x^2 + y^2 = 25 and the line y = -\frac{3}{4}x + \frac{75}{4} ?

154. ## Cal 1

Use Newton's method with the specified initial approximation x1 to find x3, the third approximation to the root of the given equation. (Round your answer to four decimal places.) 1/3x^3 + 1/2x^2 + 1 = 0, x_1 = −3

155. ## chemistry

a current of .500 A is used for the electrolytic decomposition of water. how long (in hours) will it take to produce 1.0 L (Standard temperature and pressure) of hydrogen gas? what mass of oxygen gas will be produced at the same time?

156. ## math

Application The steps to the front entrance of a public building rise a total of 1 m. A portion of the steps will be replaced by a wheelchair ramp. By a city ordinance, the angle of inclination for a ramp cannot measure greater than 4.5°. What is the

157. ## English

What is a good topic sentence for an essay about eating insects? *The article (source where I got the info from) was about insect eating and if more countries should try to consume it.

158. ## Maths

A farm rears 9 ducks and cows in his farm. There are 28 legs altogether.How many ducks are there in the farm?

160. ## maths-equation

a man travels some distance at a speed of 12km/hr and returns at 9km/hr .if the total time taken by him is 2hrs 20 min ,find the distance.

161. ## Math

The area of a certain rectangle is 288 yd2 the perimeter is 68 yd. if you double the length and the width what will be the area and perimeter of a new rectangle?

163. ## PHYSICS

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #1: A skier with a mass of 60.0 kg is standing at the top

164. ## PHYSICS

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #3: A 30 kg kid on rollerskates is being pushed by his

165. ## math

in a pentagon each of the two angles measuer 76 degrees another angle measueres 111 degrees and the fourth measures 146 degrees. what is the measuer of the missing angle? what is it can you explain step by step please!

166. ## physics

A 90kg stuntman falls from a building that is 80 meters tall. (Vo = 0) Fortunately, the stuntman is attached to a cable that is wrapped around a flywheel (massive spool), with a radius of 0.5m. If the man takes 8 seconds to reach the ground, (a) what is

167. ## Life orientation

What unethical behaviour is taking place in the case study?

169. ## Chemistry

Given these pairs of atoms, indicate whether the following bonds are polar or non-polar covalent bonds. C-H N-H O-H C-C

170. ## Chemistry

Given the part of the molecule shown below, can the red atom participate in a hydrogen bond with an approriate bonding partner? -O-H -C-H -N-H -O-H -C-H -N-H

171. ## physics

why are water tanks broader at the bottom than at the top

172. ## math

if a cylinder with a height equal to its diameter has a volume of 20 cubic inches. How can you fine the volume of a sphere whose radius is equal to that of a cylinder

Evaluate the expression 15 - n when n= 9 I am not sure but is it 6?

174. ## life orientation

What,according to the basic conditions of employment act applies with regard to the contravention

175. ## Biology

Functions Store information Copy information Transmit information What is the structure of each molecule

176. ## economics

describe and compare the following types of monopolies and the benefits of their existence: natural, technological and franchises. thank you

177. ## life orientation

what unethical behaviour is taking place at workplace

How many milligrams of sodium azide will produce 8.35 Liters of N2 at STP???

179. ## Physics-VASTS

The Mass Budget: Mars Reconnaissance Orbiter Repair Mission Operational Concept Math Problem: The Mars Reconnaissance Orbiter (MRO) has encountered a failure in its High Resolution Imaging Science Experiment (HiRISE) camera. Mission Case: As the HiRISE

180. ## English

Can somebody help me write my rough draft for a speech about how youth's and adult's should get the same penalty for crime?

181. ## math help

solve the compound inequality < 2x-4

182. ## Physics

A flat circular coil with 192 turns, a radius of 2.35 x 10-2 m, and a resistance of 0.359 Ù is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at a

183. ## Math

I'm confused on how to answer a rotation question. If I have a picture and it rotates 270 degrees to where the top of the picture is now to the left of the page did the figure rotate 270 degrees to the right or left? Since it is clockwise I was thinkng to

184. ## science

is diamond a compound?

185. ## english

Clark sees that the wind in the nebraska setting has changed aunt georgina by? A. bending her shoulsers B. rotting her teeth C. yellowing her skin D. dirttying her clothes

186. ## English

3.Neither these globes nor this map ____ my street (show shows) Is globes plural and map singular? So the answer would be shows?

187. ## Math (immediate help, please)

A bicycle has 26-inch diameter wheels. If the wheels revolved 2 times after the brakes were applied, the stopping distance is approximately _____. What's the answer? Provide a thorough explanation as well, please.

188. ## Chemistry

Recall that all aqueoous solutions contain_____. Water can also undergo ____. This process is called the ______of water. The reaction can be written as: Notice the double arrow in the reaction. This indicates that the reaction is_____. However, only a tiny

189. ## language

How do you diagram this sentence. A picture of you and me was taken.

190. ## Geometry

ABCD is a convex quadrilateral satisfying AB=BC=CD, AD=DB and \angle BAD = 75^\circ. What is the measure of \angle BCD?

191. ## algebra!!

How many integer values of x are there such that |x−3|+5

192. ## Science

The maximum number of electrons in the second energy level of an atom is ____. two four eight ten The number of _____ is equal to the atomic number. protons neutrons electrons both a and c

193. ## Algebra

A certain nation is losing 26 million acres of rain forest each year. (a) Find the linear function f that calculates the change in acres of rain forest in millions in x years. Use x as a variable (b) find f(3) and interperate the result. f(t)= Simplify

194. ## algebra

√5 ____ √45 How do you simplify this. Do you multiply the top and bottom by the square root of 45

195. ## Algebra 2

Because of friction and air resistance, each swing of a pendulum is a little shorter than the previous one. The lengths of the swings form a geometric sequence. Suppose the first swing of the pendulum has an arc length of 100 cm and a return swing of 99

196. ## Geometry

Circles \Gamma_1 and \Gamma_2 intersect at 2 distinct points A and B. A line l through A intersects \Gamma_1 and \Gamma_2 at C and D, respectively. Let M be the midpoint of CD. The line MB intersects \Gamma_1 and \Gamma_2 again at E and F , respectively.

197. ## math

use substitution to solve the system -5x+2y=27 y=2x+11 x= y=

198. ## literacy

To determine the best place to begin your online research, you should first A. formulate your research question B. choose severval verbs and modifiers to help define your search. C. identify keywords and search terms D. settle on a single, concise search

199. ## general chemistry

Calculate the molarity of each of the following solutions.70.8 in 2.51 of solution

200. ## Chemistry

What is the volume of 0.674 kg of acetylene, C2H2, at STP?

201. ## math

Identify the property or rule that justifies each step in the calculation. 4/7k+(j+1/7k) 4/7k+(1/7k+j) (4/7k+1/7k)+j k(4/7+1/7)+j 5/7k+j

202. ## math

A circular coaster, with a diameter of 7 inches, is positioned on a white placement. The placement is a circle whose radius is equal to the diameter of the coaster. About how many square inches of the placemat are NOT covered by the coaster? Show your

203. ## general chemistry

Calculate the molarity of each of the following solutions.70.8g C2H60 in 2.51L of solution

204. ## chemistry

20cm3 of saturated aqueous solution of hydrogen carbonate (iv) at 25^oc requires 10cm3 of 2.0moldm-3 hydrochloric acid for complete reaction.what is the solubility of sodium hydrogen carbonate(iv) in moldm-3 at 25^oc

205. ## Cube Problem

A cube 4 cm on each side is painted blue and cut into 64 one cm cubes. How many one-cm cubes are painted blue on exactly two faces?

206. ## Math

Emma solved this expression. (15 - 13) x 6 = 1 2 x 7 14 What was her error? Explain.

207. ## Biology

Muscle are made up of muscle functions called____ ____. Its two words... I was thinking myosin and actin , however, not sure if i AM CORRECT.

208. ## Chemistry

A 1.00 kg gold bar at 1010 K is dropped into 0.750 kg of sand at 25 °C. Assuming no heat is lost to the atmosphere, what is the final temperature of the sand?

209. ## probability

A fair dice is rolled 4 times. What is the probability that at least 2 of the numbers are the same? Use the format a/b.

210. ## geometry

Circles Γ1 and Γ2 intersect at 2 distinct points A and B. A line l through A intersects Γ1 and Γ2 at C and D, respectively. Let M be the midpoint of CD. The line MB intersects Γ1 and Γ2 again at E and F, respectively. If MA=129,MB=156 and MC=182,

211. ## Lang. Arts

Revise sentence and put commas in where necessary. Some scientists in San Francisco California filmed skateboarders in action. My answer was: Some scientists in San Francisco, California, filmed skateboarders in action. I was wrong - please help by

212. ## maths- commercial mathematics(value added tax)

A shopkeeper sells an article at the listed price of Rs.1500 and the rate of value added tax is 12% at every stage of sale. If the shopkeeper pays a Value added tax of Rs. 36 to the Government, what was the price, inclusive of Tax, at which the shopkeeper

213. ## law

what law (federal, state,etc) does abortion fall under?

214. ## Math Analysis (PreCal)

write the equation of a sine function whose amplitude: 2 period: π/2 phase shift: 2/3

215. ## Life orientation

Please guys help me with this question.What,according to the basic conditions of employment act apllies with regard to the contraventions that you've identified?

216. ## Math (immediate help, please)

Find the area of a regular pentagon with a side 8 centimeters. Please provide an explanation!

217. ## life orientation

What.according to the basic conditions of employment act applies with regard to the contravention

218. ## Algebra

Simplify 6x - x^2 (x-3)

219. ## Chemistry

Please explain this, I have no idea how to figure this out. What molecule or polyatomic ion has the following features. (a) four bonded atoms, no unshared electrons on the central atom (b) two bonded atoms, no unshared electrons on the central atom (c) two

220. ## Pre Algebra

How do i factor 9t^2+5t-4 using the "ac" method?

221. ## Algebra

Rectangle ABCD has an area of 72 units squared. The length of BF is 4 units. Algebracially prove that the sum of the areas of triangles CBF and ADF are equal to 36 units squared.

222. ## life orientation

Basic condition of employment act traffic control. What according to the basic condition of employment act applies with regard to the contravention that I've identified?

223. ## Chemistry

Determine the boiling point of a solution contanting 36.1grams calcium chloride molar mass 112 in 200.0grams water.

224. ## probability

How many 7 digit positive integers are there such that the product of the individual digits of each number is equal to 10000?

225. ## US HISTORY

Can anyonehelp me with these questions about World War II. True or false- Japan wanted to defeat Australia in WWII because of it strategic location. Many believe that the origins of WWII can be traced back to the terms of the document that they believed

226. ## PHYSICS

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #2: Suppose the spring in a pinball machine has a spring

227. ## math

Sven is thinking if two numbers. The sum is 12 . The difference is 4. What are the two numbers

228. ## math

Suppose G is a connected, simple, planar graph with 100 vertices. What is the largest possible number of edges in G?

229. ## PHYSICS

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #5: A roller coaster car starts at Point A at a height of

230. ## PHYSICS

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #8: A 20 kg block of ice slides without friction down a

231. ## Maths-financial

Determine the compound interest rate,correct to two decimal places,Emile would require to triple his investment over a period of 10 years?

okay, here's another one that isn't coming out right. Change to decimal equivalents. Round to the nearest ten-thousandth if necessary. 5'14" I got the 1 degree =60'which =3600" I did it using the example shown in the book, but the answer didn't come out

233. ## physics

I child with a mass of 20kg,hops on a merry go round with moment of intertia of 1000kg and radius of 7m.if it takes the child time T to move 360degrees ,relative to the ground at 6m away from the center,what is the angle covered relative to the ground

234. ## Physics

A 90kg stuntman falls from a building that is 80 meters tall. (Vo = 0)Fortunately, the stuntman is attached to a cable that is wrapped around a flywheel (massive spool), with a radius of 0.5m. If the man takes 8 seconds to reach the ground: (a) what is the

235. ## Statistics

A list of numbers has an average of 48 and an SD of 12. The list is transformed by subtracting 3 from each entry and then dividing the result by 5. (1) Find the average of the transformed list. (2) Find the SD of the transformed list.

236. ## Statistics

A quiz consists of 10 questions. Each question is marked either “right” or “wrong.” For each student in the class, the instructor keeps a record of the number of right answers the student got. In the class, the average number of right answers is

237. ## Life Orientation

What,according to the conditions of employment Act applies with regard to the contraventions

238. ## Statistics

Fill in the blank: 50% of the area under the standard normal curve is between -0.5 and _____________.

239. ## Biology

If the original amount of Carbon-14 is 142 kilograms, how much will the sample weight in 11,400 years?

240. ## Math

The inequality 175m < x < 178 m represents the range in the daily water levels in Lake Michigan over several days. What does this mean?

241. ## algebra

graph the system and write the solution -2x+y=6 y=1/2+3

242. ## math

ed needs to purchase 5.6 meters of tape. if each roll contains 80 cm and costs 5.00 what is the total cost of the tape ed must buy

243. ## Math

How do I find the dimensions of a rectangle if the length of the rectangle is 1 yard more than twice its width, and the area of the rectangle is 66 yards^2 .

244. ## math

Nina walked 15 yards to pauls house which rule shows how many yards nina walks for every yard pauls walks

245. ## edu/diversity

With growing concern and intake of information , a child may not be able to put new details into former mental bins and concept groups. When this occurs, a search for_____is stimulated a. coherence b. rules c. consonance d. definition Would A be

246. ## Chemistry

Calculate the pH of a solution created by adding 5.00g of LiF to 150.0mL of 1.25M HF. Ka = 7.2 x 10-4

247. ## math help re post

solve the compound inequality 0

248. ## math

If the radius of a circular wave is increasing at 2 meters/sec, how fast is the area changing when the radius is 5 meters?

249. ## math

a square kitchen floor can be exactly covered withe square tiles that are either 9 inches or 15 inches on a side. what is the minimym area in square feet that the kitchen can have? how many of each size tile would be needed to cover the minimum size floor?

250. ## history

What is the virginia state nickname meaning.

251. ## math

If the radius of a circular wave is increasing at 2 meters/sec, how fast is the area changing when the radius is 5 meters? A)62.8 square meters per second B)25.0 square meters per second C)31.4 square meters per second D)6.3 square meters per second E)

252. ## Derivative

given that f, g, and h are differentiable functions f(g(h(x))) = x what is h'(x) in terms of f, g, f', g', and h'? I plugged in equations on my own like h(x)= x^4 g(x) = 4th root of x f(x)= x^2 i need more assistance on how to proceed thnx

253. ## math

Lori runs 4 more miles than Maria runs. Together, they run 10 miles.How many miles does Maria run

254. ## chemistry

explain why iron is paramagnetic?

255. ## math

solve the following system of equations 8x+9y= -19 -3x+7y= -24 x= y=

256. ## math

use only a compass and a straightedge to construct a segment congruent to CB and angle congruent to U ACB

257. ## chemistry

which alkali metal form superoxidess?(2)explain why rubidium has a short life?

258. ## Math

Charles has 34 coins 1/3 of them are pennies 1/4 is nickles 1/6 is dimes and the rest of them are quarters. Tell how many of each coin Charles found. Draw all coins and label them

259. ## algebra

How many reachable numbers are there between 1 and 1000?

260. ## history

What is the meaning of virginia's state nickname.

261. ## Calculus

With is the integral of (9(sinx+cosx))/sin(2x)

262. ## math

f(x)=(ãx+9x)(x^3/2-x) Evaluate f '(x) at the value x = 4. f '(4) = ??

263. ## Pre-Calculus

Find the inverse of the following quadratic equation. Hint: Complete the square first. y= x²+14x+50

264. ## percentage

if p is 50% more than q,then q is what percent less than p?

265. ## Math

f(x)=√(x)(x-4) find the critical number

266. ## math

use the substitution to solve the system -5x+24=27 y=2x+11 x= y=

267. ## Chemistry

if in a solution the [H+]= 1x10-5M, then the [OH-] equals the same. true or false

268. ## Geometry

Two of the heights of a triangle are 63 and 147 . Given that the third height is also an integer, what is the maximum possible value for the third height?

269. ## Pre-Calculus

Find the inverse of the following quadratic equation. Hint: Complete the square first. y= 2x²+16x-5

270. ## Geometry

ABCD is a convex quadrilateral satisfying AB=BC=CD, AD=DB and \angle BAD = 75^\circ. What is the measure of \angle BCD?

271. ## chemistry

what is equillibrium?

272. ## Law

Where can I find info on Professional Competence and Training in counseling?

273. ## LA

Who said " give me a pencil or give me death"?

274. ## math

Find the slope m and an equation of the tangent line to the graph of the function f at the specified point. F(X)=x^2/x+6;(3,1) m = ?? y = ??

275. ## English

Are compound subjects two or more sentences combined with and, or, nor?

276. ## Math

Find the derivative of the given function. f(x)=(ãx+9x)(x^3/2-x) f '(x) = ?? Evaluate f '(x) at the value x = 4. f '(4) = ??

277. ## Calculus

Evaluate \displaystyle \lim_{x \to 0} \frac{e^{44x} - 1}{x^2+2x}.

278. ## Algebra

Out on my street, there are a certain number of pigeons sitting on telephone poles. If there were exactly 2 pigeons sitting on each telephone pole, then 1 pigeon would have no space to sit on. If there were exactly 3 pigeons sitting on each telephone pole,

279. ## general chemistry

Calculate the molarity of each of the following solutions. 12.03mg KI in 107.6mL of solution.Express your answer using four significant figures.

280. ## Algebra

Out on my street, there are a certain number of pigeons sitting on telephone poles. If there were exactly 2 pigeons sitting on each telephone pole, then 1 pigeon would have no space to sit on. If there were exactly 3 pigeons sitting on each telephone pole,

281. ## Algebra

Out on my street, there are a certain number of pigeons sitting on telephone poles. If there were exactly 2 pigeons sitting on each telephone pole, then 1 pigeon would have no space to sit on. If there were exactly 3 pigeons sitting on each telephone pole,

282. ## physics

A 36 cm long copper wire carries a current of 6.0 A and weighs 0.45 N. A certain magnetic field is strong enough to balance the force of gravity on the wire. What is the strength of the magnetic field?

283. ## Trigonometry

\sqrt{i} in polar form can be written as r(\cos \theta + i \sin \theta), where r is a real number and 0 \leq \theta \leq \frac{\pi}{2}. What is the measure of \theta (in degrees)?

284. ## Physics

A 4kg mass is pushed with a constant force for 1m then off the edge of the table and lands 7m from the edge of the table. a) What was the force pushing on the mass? b) What is the resultant velocity?

285. ## algebra

N= 0.03x - 58.91

286. ## algebra

The number N of state and federal inmates in millions during year x, where x>2002 can be approximated by the following formula N= 0.03x-58.91 Determine the year in which there were 1.3 million inmates. It was in the year_______

287. ## Geometry

How many perfect squares less than 1000 end with the digit 6?

288. ## MA111

lim x!0 k + cosmx x2 = −4 . FIND M AND X?

289. ## Math

The old 30-question AHSME was graded as follows: Students were awarded 5 points for a correct answer, 0 points for a wrong answer, and 2 points if left blank. The maximum score was 150, and the minimum score was 0. Find all integer scores between these

290. ## help plsss

A bucket contains 8m^3 of water. Using two smaller buckets of 3m^3 and 5m^3 respectively. How will you manipulate accurately so that only 4m^3 is left in d biggest bucket?

291. ## maths help plsss

A bucket contains 8m^3 of water. Using two smaller buckets of 3m^3 and 5m^3 respectively. How will you manipulate accurately so that only 4m^3 is left in d biggest bucket?

292. ## Calculus

square root of (12), square root of (12 + square root of (12)), square root of (12+ square root of (12+ square root of (12))) Write a recursion formaula for an(subcription), n greater than or equal to 2.

293. ## Lang. Arts

Rewrite sentence and place commas where necessary. Yes skateboarding is not only a sport but a science. I wrote: Yes, skateboarding is not only a sport, but a science. I was wrong...can you please help me by correcting.

294. ## physics

. A block weighing 50 lbs is pulled horizontally w/ constant speed, if the coefficient friction between the surfaces in contact is 0.25, how much heat is generated by friction if the body moves a distance of 40 ft

295. ## English

Is fill in the blank A _______ is a character that has qualities that represent a group instead of the individual character

296. ## unkown

How many people have 91% of vitiamans?

297. ## math

15 - (2 x 2) x 3

298. ## Chemistry

Mercury dissolves in concentrated nitric acid, with the evolution of a reddish-brown gas, just as in the reaction shown in figure 5.4 on page 188 for copper. The oxidation state of the mercury after reaction is +2. Write a balanced net ionic equation for

299. ## Math

I don't know what 4r=96 means. Also I don't know what 51=3n means!😰😁😱😨📝HELP! It's due tomorrow

300. ## math

what is the value of 3^0+3^-2

301. ## English

Circle the verb that agrees with the subject of each sentence below 1.Black and white (is are) my favorite color combination. is 2.The trees and shrubs (look looks) nice today look 3.Place mats or a tablecloth (go goes) in the picnic basket 4.Trucks and

302. ## compound interest

1. If you were to place \$15,000 in the bank at 3% interest, how much would you have in the bank after one year if the interest were compounded quarterly?

303. ## Science

how would tides be different if the moon revolves as fast as the earth rotate

304. ## PHYSICS

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #4: What is the increase in thermal energy to a 2000 kg

305. ## English

Circle the verb that agrees with the subject of each sentence below 1.Neither my coat nor my dresses (is are) in the suitcase. are 2.Dell and Amy really (like likes) science like 3.The St. Bernard and the terrier (play plays) together play 4.Either the

306. ## Physics

What does a simple pendulum travel through at the lowest point during its period?

307. ## Physics

A 1.2kg box on a table slides through a displacement of d is equals to 2m a frictional force fx =0.5N Wat is the initial speed of the box

308. ## Pre-Algebra

How do you Factor t^2 + 4z^2

309. ## Math

How do I factor y^3 + y^2 -4y -4

310. ## geometry

When v mark 4 points on a paper how many line segments are formed ....

311. ## chemistry

A gas with the smell of rotten eggs is evolved with dilute sulphuric acid is added to a simple of salt.the gas evolved could turn?

312. ## Life Orientation

What unethical behaviour is taking place?

313. ## math

the problem is 0 < less then or equal to 2x-4

314. ## math

2x^2+7x+3/x^2-2x-15

315. ## math

what is 5x + 2>3x + 10

316. ## Fundamentals of math

solve the system by substitution.. -3x-5y=-17 4x=y-8

317. ## Algebra

Simplify (x^-6)-3

318. ## algebra

Simplify (uv)0 ______ (u3 v)2

319. ## math

identify all real roots of x^3-9x^2+16x-8=0

320. ## Statistics

In the quiz in Exercises 1 and 2, the grading scheme is as follows: each right answer is awarded 5 points, and 1 point is taken off for each wrong answer. Recall that the quiz consists of 10 questions, and that in the class, the average number of right

321. ## algebra

multiply using FOIL and identify values of a, b, & c. (5x +5)(6x - 8)

322. ## Statistics

The average weight of a group of people is 156 pounds and the SD is 25 pounds. A statistician wants to transform the weights so that the transformed weights have an average of 100 pounds and an SD of 10 pounds. Fill in the blanks; both blanks must be