# Questions Asked onSeptember 24, 2012

1. ## science

why does the change for the atomic radii of the elements in period 3 look similar to period 2?

2. ## Calculus

Given Z = 2(cos 148° + isin 148°) and W = 5(cos 11° + isin 11°), find and simplify z/w. 10(cos 137° – isin 137°) 0.4(cos 137° + isin 137°) 0.4(cos 137° – isin 137°) 10(cos 137° + isin 137°)

3. ## Chemistry Check

A thermocouple was calibrated to give Celsius temperature. In the ice bath the voltage reading was 0.250 V, and in boiling water at 736 Torr the reading was 1.20 V. Derive the conversion equation between Volts and temp. C. So if I'm working this right, it

4. ## Chemistry

A gas can holds 1.5 of gasoline, what is this quantity in cubic centimeters? answer using two significant figures,

5. ## Calc 1

I need help solving for this final problem to complete my assigment. Please help! Solve for x: ln(x^4)-ln(x^2)=2

6. ## english

Identify which one of the following sentences is missing punctuation. Please correct the error and explain why the correction is necessary. a. I woke up when the book slipped from my lap and landed on my foot. b. After the book slid from my lap and landed

7. ## social problems

analyzing cultural traits and items. kinds of foods and eating patterns differ in other cultures. for ex. in many parts of the world people use only their right hand to eat. investigate an area of the world in which you are interested and compose a report

8. ## Calculus

I need help solving for this final problem to complete my assigment. Please help! Solve for x: ln(x^4)-ln(x^2)=2

Using a force table the direction and magnitude had to be found for the following measurements: F1 = 200 grams at 30 degrees; F2 = 200 grams at 120 degrees The magnitude and direction found was 280 grams at 257 degrees. Using the magnitude and direction of

10. ## chemistry

Describe how you would prepare 10 mL each of 2 M, 1.5 M, and 1 M NaCl solutions from a 2 M stock NaCl solution. Describe your actions–exactly what you woulddo–step-by-step–when preparing thissolution. Also show all calculations. Be sure all amounts

11. ## Chemistry

Calculate the energy in calories lost when 30.0 ethanol, , cools from 56.5 degree Celsius to -42.0 degree Celsius.

12. ## chemistry

[correction]Calculate the energy in calories lost when 30.0 grams of ethanol cools from 56.5 degree Celsius to -42.0 degree Celsius.

13. ## math

exam rose from 20.8 to 21.1 what percent increase was this nearest to the tenth?

14. ## chemistry

What is the density of a 23.92 g object block if the dimensions: length = 10.6 mm height = 5.47 cm width = 0.0352 m

15. ## chemistry

What is the density of a block of unknown material with a mass of 19.07 g if the dimensions are: length = 3.1 cm height = 1.9 cm width = 4.6 cm

16. ## Physics

A block of mass 3m is placed on a frictionless horizontal surface, and a second block of mass m is placed on top of the first block. The surfaces of the blocks are rough. A constant force of magnitude F is applied to the first block. Assume that the upper

18. ## Social studies

What does "the Pyramids" refer to in Egypt? How many pyramids are called 'the Pyramids'?

19. ## physics

calculate the impulse to stop a 1500kg car moving 90kmper hours

20. ## chemistry

how many grams of NaOH should be used to make 200 mL of a 0.24M solution of NaOH starting with a .4M HCL solution

21. ## physics

A ball is dropped from rest off a 27 m building.What is the maximum speed that the ball will reach?

22. ## chemistry

Need to write a brief description of the procedure required to make 900mL of a 0.5 M NaCl solution. The formula weight of NaCl is 58.4g/mole.

23. ## precalculus check immediately

suppoe f is a function with domain [1,3]and range[2,5]? define functions g and h by g(x)=3f(x)and h(x)=f(4x) what is domain and range of g what is domain and range of h I solved it and got it like this domainof g=[1,3]and range of g=[3,9] Domain of

24. ## Health

Help needed Who might be responsible for abuse in clients with dementia?

25. ## Physics

A stone is dropped from the roof of a high building. A second stone is dropped 1.51 later. How far apart are the stones when the second one has reached a speed of 12.6 ?

26. ## Physics

A person who is properly constrained by an over-the-shoulder seat belt has a good chance of surviving a car collision if the deceleration does not exceed about 30 "'s". Assuming uniform deceleration of this value, calculate the distance over which the

27. ## algerbra

24+61+b+3a+b+3d How do you do this?!

28. ## physics

A boy is sledding down a slope that is inclined at 30.0° with respect to the horizontal. A moderate wind is aiding the motion by providing a steady force of 108 N that is parallel to the motion of the sled. The combined mass of the boy and sled is 53.6

29. ## physics

if an egg is thrown at an initial height of 1.9m and lands 2.09s later at 19m what is the velocity at which the egg was thrown and the velocity with which it lands

30. ## English

A: I'm very hungry. B: Let's go to the restaurant then. (In this sentence, what is the use of 'the' before 'restaurant'? Does it refer to the specific restaurant or is 'the' used in generic usage?)

31. ## maths

30% of the t-shirts on a shelf are small. 40% of the remainder are large and the rest are medium. There are 240 more meduium than small t-shirts. How many t-shirts are there altogether?

asked by joel needs help urgently

64. ## American History

As passed by the Congress after McKinley delivered his war message to Congress, the declaration of war against Spain was modified by the Teller Amendment, which stipulated that A. the United States wouldn't annex Cuba. B. trade with Spain would continue as

65. ## world civilization

How was Roman society different after the struggle ended? during the 5th century

66. ## American History

Which of the following statements is most accurate regarding America's political climate between 1876 and 1896? A. The influence of the president over Congress diminished. B. Southern states tended to vote Republican. C. Little political power or influence

67. ## Physics

If it takes 2.37 seconds for a stone to hit the ground from a cliff. (a) From what height was the stone dropped from? (b) What is the stones final velocity when it hits the ground?

68. ## Science chemistry

It takes 1 hour and 17 min. for a 1.000gsample of a certain isotope to decay to 0.121g. What is the half-life of this isotope? plssss helpp

69. ## economic

explain the importance of the following terms in the u.s. free enterprise systerm;(A) profit motive, (B) voluntary extange, (C) private property rights, and (D) compition

75. ## Physics

Using T-charts A marble it dropped from a stair well that is 4.3 m high. (a) How long will the marble be in the air for? (b) What speed will it be traveling at as it hits the ground?

76. ## US Government

Dicuss two influences on the development of the U.S. Constitution. Explain how two of the items you identified influenced the specific content of the Constitution.

77. ## Chemistry

What does it mean if the percent of sulfate in a sample of alum is greater that the theoretical percent of sulfate in alum?

78. ## statistics

An insurance company charges its policy holders an annual premium of $200 for the following type of injury insurance policy. If the policy holder suffers a "major injury" resulting in lengthy hospitalization, the company will pay out$15,000 to the injured

79. ## chemistry

if you are exposed to all sources of radiation from natural sources and human activities (worldwide average). How many years would it take for you to absorb a fatal dose of radiation plss help

80. ## literature

Where is Hrothgar leading the warriors at the beginning of Episode Seven?

Choosing to blow the whistle on your employees or coworkers can create all kinds of legal, ethical, and career complications. Here are five common workplace scenarios that will challenge employees about whether or not they should go public with potentially

82. ## Mad percent of CuS and Cu2S in an ore sample

Suppose an ore sample contains 11.01 % impurity in addition to a mixture of Cu2S and CuS. Heating 102.5 g of the mixture produces 74.90 g of solid which is 88.18 % copper. What is the mass percent CuS in the ore?

83. ## English

Which word in the set below carries a neutral connotation? confounded puzzled muddled bamboozled I'm thinking its puzzled. Thanks for the help.

84. ## math

A student take in 2,300 calories and burns 2,500 calories. find the net change

85. ## early childhood literacy

1.preschoolers use private speech to: 2.words are: 3.is gluing a writing skill: 4.is cutting a writing skill: 5.the first language arts skill that c hildren learn is: 6.what are words: 7.let me in said the pin.this is an example of: mr. rogers wants to

86. ## chemistry

which element is liquid @ 25.0c and 1 atmosphere pressure?

87. ## Art Northern European Renaissance

Match with the correct word 1. The Renaissance coincided with dog 2. Van Eyck's paintings lack any reference to this eating 3. Brueghel’s detailed portraits of daily life are called the Protestant reformation 4. The people he liked to paint peasants 5.

88. ## Chemistry

Find the thetrical formula for .012 mol of H20, .0056 moles of Cl2 and .0060 of copper with a formula like this CuCl*H20 *=point in center

89. ## writing/puncutation

I wrote this need someone to check make sure grammar and punctuation is ok! Thanks! Having a high school diploma is very important to my future. I will no longer feel ashamed, because I was never able to finish my schooling. I will be able to work towards

90. ## Calculus

Find the intervals on which the given function is increasing and decreasing. y=-x^2-2x y'=-2x-2 critical point x=-1 Increasing [-infinity,-1) Decreasing (-1,infinity] is this the correct way of writting this wiht the brackets

91. ## Psychology

What am I suppose write about when I am asked to describe my self-concept? Note: Do NOT just give a link to the definition. I know what it means already.

92. ## Pre-Ap Physics

During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 2.65 km/s at an initial inclination of 41.9◦ to the horizontal. The acceleration of gravity is 9.8 m/s 2 . How far away did the

93. ## Pre-Ap Physics

To win the game, a place kicker must kick a football from a point 17 m (18.5912 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 15 m/s at an angle of 58.9 ◦ from the

94. ## math

an object released from rest will fall 16t^2 feet, t seconds after it is dropped. 2 pebbles are dropped, one after the other, from a cliff that is 64 feet high. the 2nd pebble is released the instant the first pebble has fallen exactly one foot. how far

95. ## physics

A model sailboat is slowly sailing west across a pond at 0.342 m/s. A gust of wind blowing at 28.7° south of west gives the sailboat a constant acceleration of magnitude 0.305 m/s2 during a time interval of 1.87 s. If the net force on the sailboat during

96. ## PROJECTILE MOTION

A ball is thrown horizontally from the top of a cliff 50m high with a velocity of 7m/s. How far from the base of the building does the ball land. This is what I think is how you do the question(Please correct me if I am wrong). y=vt+.5a(t)²

97. ## college physics

new planet is discovered orbiting a distant star. Observations have confirmed that the planet has a circular orbit with a radius of 21 AU and takes 118 days to orbit the star. Determine the mass of the star. State your answer with appropriate mks units.

98. ## college physics

Although astronauts appear weightless, they are not. They only appear weightless because they are in free fall. If a 79 kg astronaut is orbiting Earth with an orbital radius of 5.31×107 m, determine how much the astronaut would weigh. Earth's mass is

99. ## college physics

A new planet has been discovered that has a mass one-tenth that of Earth and a radius that is one-sixth that of Earth. Determine the free fall acceleration on the surface of this planet. Express your answer in the appropriate mks units.

100. ## math

There are 9 players on each basketball team in a league. Explain how you can find the total number of players in the league if there are 30 teams.

101. ## biology12 HELP ASAP TEST TOM

For each given word start with the wor and put the rest in order appropriately> RIBOSOME----> golgi complex, vesicale food to be digested, rough er, lysosome put in order MITOCHONDRIAN---> muscles use energy, energy made , carboydrate and oxygen

102. ## math

I am a number between 50 and 60.One of my factors is 28.What number am I?

103. ## medical records

how important is having the ability to read medical charts and reports? Why can abbreviations in charts be a cause of concern? How would you ensure that your staff and other health care professionals are proficient in medical abbreviations and terminology?

104. ## chemistry

It takes 1 hour and 17 min. for a 1.000g sample of a certain isotope to decay to 0.121g. What is the half-life of this isotope? plssss helpp

105. ## Literature

If an author is skillful at representing the point of view and attitudes of a hobo, a nurse, a corporate CEO, and a variety of other diverse characters, the author is demonstrating A. dramatic irony. B. first person reporting. C. negative capability. D.

106. ## Literature

In The Call of the Wild, when London writes about "what a puppet thing life is," it reflects the theme summarized in which of the following statements? A. Our lives are lived in response to our predetermined fate. B. Each life pits mercy against nature. C.

107. ## General Chemistry

Which chemical reactions would you consider to be of importance to a healthcare professional and why?

108. ## Pre-Ap Physics

During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 2.65 km/s at an initial inclination of 41.9◦ to the horizontal. The acceleration of gravity is 9.8 m/s 2 . How far away did the

109. ## Chemistry

1. What is the minimum volume of hot water needed to dissolve 0.200g phenacetin? How much phenacetin will remain in that volume of water once it cools? 2. Why is it important that all the solid dissolves in the hot solvent, before the solution is cooled?

126. ## math

What phrase is used to describe a rhombus? A. a parallelogram with four congruent angles B. a parallelogram with four congruent sides C. a rectangle with four congruent sides D. a quadrilateral with no congruent sides Thanks!

127. ## english

Which of the following choices best describes the error in this sentesce? The man is a scientist with a keen sence of observation and who dedicates long hours in the lab. A Misplaced modifier B Fragment C Dangling modifier D Uneven parallelism I chose D

128. ## math 176

please detail all the steps for x squared minus 6xy plus 9y squared minus 4z squared

129. ## Algerba 1

I have to put these intergers in order from least to greatest. 12, -6, 20, -47, -11 I didn't do well on my last test. I am really trying to figure this out. my answer is -6, -11, 12, 20, -47

130. ## ant 101

A “hope chest” is a form of: (Points : 1) *brideprice. bridewealth. dowry. brideservice.

131. ## World Geo

Why is New Zealand considered part of Polynesia? Thanks for any and all help!!! ☺ sk8rgurl99

132. ## social studies

The nearest river to my hm. I live in the Midwest.

133. ## early childhood literacy

when children do print alphabet letters,among the easiest to print are:

134. ## math

whats the value of the 5 in 752,034

135. ## Physics

My professor tells me I'm not using the right formula for this problem. can someone please help me. The formula is not delt p = density x gravity x height The mercury manometer on the right and the pressure transducer on the left are both connected to a

136. ## Chemistry

At 298K and 1bar pressure, the density of water is 1.00 g/cm^3 , Cpm = and 75.3 J/Kmol. The change in volume with temperature is given by delta V = ViB(deltaT), where B, the coefficient of thermal expansion, is 2.07 * 10^-4 K^-1. If the temperature of 350g

137. ## Square Roots

1. Which two square roots are used to estimate the square root of 5? 2. Estimate the value of the square root of 43 to the nearest integer. 3. An estimate for the negitive square root of 66 is?

138. ## Math

tiffany will us a total of 63 tiles for her art project she only needs 17 more tiles use mental math to find how many tiles she has already

139. ## psychology

__________ serve as the cytoskeleton of the brain. They support the function of neurons by insulating, repairing, and nourishing them.

140. ## trig

A boat is 23 mi due west of lighthouse A. Lighthouse B is 14 mi due north of lighthousenA. Find the bearing of lighthouse B from the boat and the distance from lighthousenB tho the boat.

141. ## Math

A used bookstore sells paperback fiction books in excellent condition for 2.50$and In fair conditions for 0.50$. Write an expression for the cost of buying (e) excellent condition paperback and (f) fair condition paperback.

142. ## trig

A boat is 23 mi due west of lighthouse A. Lighthouse B is 14 mi due north of lighthousenA. Find the bearing of lighthouse B from the boat and the distance from lighthousenB tho the boat.

which laws do you think appear to have the greast impact on marketing? why?

144. ## Math

Writing to Explain If you start with an unbalanced scale and add the same amount to each side, what happens to the scale?

145. ## Geometry

The surface area of the sides of a right cylinder can be found by multiplying twice the number pie by the radius times the height. If a circular cylinder has radius (r) and height (h), write an expression that represents the surface area of its size.

146. ## writing

I have been trying to work on this assignment and I am not really understanding it and I try to get help from my teacher and she keeps sending me this and telling me when I do this she will help me with the rest but I don't understand this and I have told

147. ## math

I am the smallest 2 digit odd number whose digits add to 2. i look the same backward and forward and so does my square product. my square product is a 3 digit number. what number am i and what is my square product?

148. ## Physics

The drawing shows an exaggerated view of a rifle that has been ‘sighted in' for a 91.4-meter target. If the muzzle speed of the bullet is v0 = 392 m/s, there are the two possible angles θ1 and θ2 between the rifle barrel and the horizontal such that

149. ## Physics

A diver springs upward from a board that is 4.40 m above the water. At the instant she contacts the water her speed is 14.0 m/s and her body makes an angle of 68.8 ° with respect to the horizontal surface of the water. Determine her initial velocity, both

150. ## Spanish Beg. 1 - Help!!!!!!!

From the worksheet - The map below shows part of the flight route of Aerolineas Argentinas, the Argentine airline. The capital cities are marked on the map, but the country names are not. Write the name of each country on the map. â€¢ Managua â€¢

175. ## Earth Science

determine the slope of an area, given the following: Start measuring at 700ft. measure a distance of 4 miles, and end at an elevation of 2432ft

176. ## Math

Alex scored 13 points in the basketball game. This was 1/5 of the total points the team scored. Write and solve an equation to determine the total points t the team score.

177. ## arithmetic

jane says that 546 can be represented by 53 tens and 16 ones. Is she correct? Elain

178. ## Physics

How long does it take an automobile traveling 74.3 km/h to become even with a car that is traveling in another lane at 58.3 km/h if the cars’ front bumpers are initially 114 m apart? Answer in units of s

179. ## Physics

a 96.4kg boxer has his first match in the canal zone with gravitational acceleration 9.782m/s^2 and his second match at the north pole with gravitational acceleration 9.832m/s^2. What is his mass in the canal zone? answer in units of kg

180. ## spanish

can u unscramble these letters to make a spanish phrase esosaaapahilbnoehstlsipn

181. ## us history

what are the political and social trends from westward expansion

182. ## chemistry

A sample of sodium reacts completely with 0.568 of chlorine, forming 936 of sodium chloride. What mass of sodium reacted?

183. ## Chemistry

When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 25.2 of carbon were burned in the presence of 80.6 of oxygen, 13.4 of oxygen remained unreacted. What mass of carbon dioxide was produced?

184. ## Physics

A child is hanging at the midpoint of a string and the string form an angle of 15 degrees with horizontal line. What's the force in the string? The answer is 850N. Who can show me the solution???

c+d+90=180

186. ## math

six times some number added to 6 amounts to 33 added to the product of 3 and the number a)27 b)-27 c)-9 d)9

d+90=180

188. ## Trig

A sprinkler on a golf green is set to spray water over a distance of 20 meters and to rotate through an angle of 160°. Find the area of the region that can be irrigated with the sprinkler. (Round your answer to two decimal places.) I really have no idea

199. ## Algebra

consider the following equations: 6x = 2y - 9 9 - y + 3x = 0 1/3y = x - 9 What do they all have in common ?

200. ## math

order from least to greatest: 2.7, 2 1/7, 3.13, 1 9/10

201. ## math

order from least to greatest: -2.21, -2.09, -2 1/9, -1 10/11

202. ## physics

. A race car moves such that its position fits the relationship x = (5.0 m/s)t + (0.75 m/s3)t3 where x is measured in meters and in t in seconds. (a) Plot a graph of the car’s position versus time. (b) Determine the instantaneous velocity of the car at

203. ## math

order from lest to greatest: 6 7/8, 6 15/16, 6.9, 5,3

204. ## math

order from least to greatest: 5 9/11, 5.93, 5 7/10, 5.81

205. ## Math

-8(t-3)-(t+1)=6

254. ## geometry

What is the approximate length of line MN when the coordinates of its end points are (-4,5) and (-6,9)?

255. ## college physics

An object acted on by three forces moves with constant velocity. One force acting on the object is in the positive x direction and has a magnitude of 6.5 N; a second force has a magnitude of 3.9 N and points in the negative y direction. Find the direction

256. ## math

28 miles downstream in 2 hours 12 miles upstream in 3 hours what would the be speed in still water

257. ## World Geo

what brought the Maori to New Zealand? open land for farming open land for hunting wars in their "home" land

258. ## Geography

What are the differences betwen formal, functional, and perceptional regions?

259. ## Physics

A plane drops hamper of medical supplies from a height of 2740m during a practice run over the ocean. The plane's horizontal velocity was 126m/s at the instant the hamper was dropped. What is the magnitude of the overall velocity of the hamper at the

260. ## science

A sphere of radius 4 cm iss carved from a homogenous sphere of radius 8cm and mass 160g. the mass of the smaller sphere is

261. ## economics

1. Suppose that as the price of Y falls from $3.00 to$1.00 the quantity of Y demanded increases from 10 to 18. Compute the price elasticity of demand. Is the demand elastic or inelastic?

Assume it costs Microsoft $4,700 to manufacture 7 Xbox 360s and$8,690 to manufacture 14. Obtain the corresponding linear cost function.