# Questions Asked onFebruary 14, 2013

1. ## english

topic: Negative impact of teenagers usage on Facebook. Need to write a paragraph on this topic don't know what to say or how to start. Must have an introduction with a thesis statement.

2. ## math

in the given figure,QRSis a straight angle.If a=2c,c=2b,b=d/3,what is the value of d?plz help me plz

3. ## Biology

Which chromosome is more exposed to sex-linked disorders X or Y chromosome? Why?

4. ## Chemistry

Need help on a lab results write-up. The lab is the synthesis and analysis of a transition metal complex. General reaction was stated as: Fe(III) + x(acac) -> Fe(acac)x - we were to determine x by completing experiment. x = 1, 2, 3, 4... acac = 2, 4

5. ## Trigonometry

Verify/Solve the identities. 1.) SIN^1/2 X COS X-SIN^5/2 X COS X 2.) Long problem, but it's fun to solve! SEC^6 X(SEC X TAN X)-SEC^4 X(SEC X TAN X)

6. ## Physics

If a small planet were located 7 times as far as the Earth's distance from the Sun, it period is ___ earth years?

7. ## english

is this sentence correct? There are quite a few reasons for me taking a break during this period.

8. ## Math

Serena paid $20.20 for 36 rulers and folders. She bought 16 more folders than rulers. If each folder cost$0.50 more than each ruler, how much did each folder cost?

9. ## Trigonometry

Verify the identities. 1.) SIN[(π/2)-X]/COS[(π/2)-X]=COT X 2.) SEC(-X)/CSC(-X)= -TAN X 3.) (1 + SIN Y)[1 + SIN(-Y)]= COS²Y 4.) 1 + CSC(-θ)/COS(-θ) + COT(-θ)= SEC θ (Note: Just relax through verifying/solving these nice fun looking math problems!

3/8 + 3/4 =

11. ## math

Ms.plz i have school tomorrow plz.its my H.W.

12. ## english

can divining be replaced by doubting or realizing

13. ## Physics

Jo student undertakes a unique experiment with his calculator. He goes to the school roof that is 18.0 m above the ground. He throws the poor calculator upward with a velocity of 42 m/s. Assume that the calculator goes straight up and just misses the roof

14. ## Physics

A 0.03-kg bullet is fired vertically at 200m/s into a 0.15-kg baseball that is initially at rest. The bullet lodges in the baseball and, after the collision, the baseball/bullet rise to a height of 37m. (a). What was the speed of the baseball/bullet right

15. ## physics

You are lying on the beach on a tropical island on the equator, watching the Sun set - what a beautiful scene! Immediately after the top of the Sun disappears, you stand up to watch the Sun set again. After the amount of time t=10 s the top of the Sun

16. ## chemistry

Exactly 50.0ml solution of Na2CO3 was titrated with 65.8ml of 3.00M HCl. If the specific gravity of the Na2CO3 solution is 1.25, what percent by weight of Na2CO3 does it contain?

17. ## Fundamentals of Chemistry

balance the equation by ion electron method. Fe^++ + MnO4- = Fe3+ +Mn2+ (acidic medium) please help me..!!

18. ## Math (Proof)

Prove that if ab = ac (mod n) and a is relatively prime to n, then b = c (mod n). Proof: a and n are relatively prime and from ab = ac(mod n), we have n|(ab-ac), so n|a(b-c). Since (a,n)=1 (relatively prime), we get n(b-c). hence b=c(mod n). But what if a

19. ## math

A pump brings underground water up to ground level. The water flow is measured in litres per minute.The pump fills an 18 litre bucket in 7 seconds.what is the speed of the pump flow

20. ## CHEMISTRY

Ni(NO3)2.H2O+2KSCN WHAT IS THE PRODUCT?? WHAT COMPLEX IS FORMED ?

21. ## physics

Each of the four circuits in the drawing consists of a single resistor whose resistance is either R or 2R, and a single battery whose voltage is either V or 2V. The unit of voltage in each circuit is V = 10 V and the unit of resistance is R = 8 Ω.

22. ## Chemistry

1) Aldrin and dieldrin are pesticides that used to be allowed for the control of soil insects. In ontario, the maximum allowable total concentration of alrin plus dieldrin in drinking water is 0.7 ppb. If a 250mL sample of drinking water is found to

23. ## chemistry

The concentration of a certain ionic compound in aqueous solution is 0.186mol/L . It is only solute in the solution. The concentration of pottassium ions in the same solution ia 0.558mol/L. Explain why the concentrations of the ions in the solution are

24. ## english

I would like ur opinion on the book that I should read,,, should I read all good children? Is it worth it?

25. ## chemistry

why cant Na be used to prepare H2?

26. ## stats of biologists

a manufacturer claims that the life time of a certain brand of batteries has a varaince of 5000(hours)^2. a sample of 26 has a variance of 7200(hours)^2. assuming that it is reasonable to treat these data as a random sample from a normal population, test

27. ## chemistry

How many moles of water will produced at equilibrium be if there is 1.0 mole of carbon dioxide formed at equilibrium?

28. ## Physics

You drop an object from atop a building and it takes 7.20-sec before it hits the ground. Assume that there is no air resistance, how tall is this building?

29. ## Math

I have to find the exact value(so in fraction form.. like 1231231/41231 or something) of a^4b^2/c^2 , a = (2/5)^2, b = (8/5)^5 c= (4/5)^10 I'm honestly not sure how to get around to doing it with working

30. ## maths-urgently needed

There is a garden of apples and the profit from a garden of apple trees is given by f( x ) = 70 + 30 x^2 - (1/3) x^3, where x = number of apples trees per acre. How many trees per acre will maximize the profit?

31. ## math

cotx+tan2x=cotxsec2x prove

32. ## Phy113

Calculate the average traslation kinetic energy of a nitrogen molecule at 27 degree celcius

33. ## Sjava

Log x=log25+log4

34. ## Math

Referring to the experiment of rolling two fair dice, let A be the event that the total is less than eight and let B be the event that the total is even. Draw a Venn diagram corresponding to this experiment and events A & B (using probabilities). 1

35. ## Maths, find the Exact Value

have to find the exact value(so in fraction form.. like 1231231/41231 or something) of 2/3 + 3/4 - 2/11 - 5/21 I'm unsure of the working

36. ## Math

Referring to the experiment of rolling two fair dice, let A be the event that the total is less than eight and let B be the event that the total is even. Draw a Venn diagram corresponding to this experiment and events A & B (using probabilities). 1

37. ## Phy113

At what temperature will the root-mean-square speed of oxygen molecules have the value of 640 m/s? 1 kilom has a mass of 32kg.

38. ## Phy113

At what temperature will the root-mean-square speed of oxygen molecules have the value of 640 m/s? 1 kilom has a mass of 32kg.

39. ## Phy113

At what temperature will the root-mean-square speed of oxygen molecules have the value of 640 m/s? 1 kilom has a mass of 32kg.

40. ## physics

charge q1=+4.00nc is located at x=0.200m, and q2 =+5.00nc is at x=-0.300 m. what are the magnitude and directionof the net force exerted by these two charges ona negative point charge q3 = -0.600 nc placed at the origin ? I think I need to find the F of

41. ## Phy113

At what temperature will the root-mean-square speed of oxygen molecules have the value of 640 m/s? 1 kilom has a mass of 32kg.

42. ## Phy113

At what temperature will the root-mean-square speed of oxygen molecules have the value of 640 m/s? 1 kilom has a mass of 32kg.

43. ## physics

If a protonand an electron are released when they 2.0X10^-10m apart, find the initial accelerationof each of them. I know a=ke^2/mr^2 k = 8.99 x 10^9 e = 1.6 x 10^-19 r = 2.0x 10^-10 so what is the m ????

44. ## Phy113

At what temperature will the root-mean-square speed of oxygen molecules have the value of 640 m/s? 1 kilom has a mass of 32kg.

45. ## chemistry

h2s + HNO3 -->s+ no+H2O balance by oxidation number change

46. ## math

What is the combined speed if a plane traveling at 500 km/hr has a tail wind of 50 km/hr?

47. ## chmistry

balance each of the following chemical equations ,using the change in oxidation number method. cu +h2so4=cuso4+so2+h2o

48. ## Math

Alice and Finn roll two number cubes. Which of the following rules will make the game fair? Alice wins if a total of 5 is rolled. Finn wins if a total of 9 is rolled. Alice wins if a total of 7 is rolled. Finn wins if a total of 8 is rolled. Alice wins if

49. ## chemistry

A 230 g sample of a compound contains 136.6 g of carbon, 26.4 g of hydrogen, and 31.8 g of nitrogen. The rest is oxygen. What is the mass percent of oxygen in the compound?

50. ## maths-urgently needed

find the equation of circle if the line 2x - y +1 = 0 touches the circle at the point (2,5) and the center of the circle lies on the line x+y -9 =0

58. ## maths

a person observed from the top of a light house which is 80 m above the sea level that angle of depression of two ships are 45 degree and 60 degree. The two ships are on same side of the light house.They are in the line with the foot of the light

59. ## Math

Why area is measured in square feet? And why is volume measured in cubic feet?

60. ## maths

If a, b and c are sides of a triangle Then prove that 1≤ [(a^2+b^2+c^2)/(ab + bc+ca)]

61. ## statistics

if a sample of a distribution of sample size 26 has a range of 56, then what would be an estimate of the sample standard deviation

62. ## physical sciene

Two 2.2 kg physical science textbooks on a bookshelf are 0.15 m apart. What is the magnitude of the gravitational attraction between the books?

63. ## Law

I am looking for a currect event in a newspaper article that I can relate to criminal law. Any suggestions..

64. ## Education/Technology

Is concept mapping a type of word processing software?

65. ## Mechanics

An aeroplane propeller has a 100kg and radius of gyration of 0.6cm.find its moment of inertia.How large a torque is required to give it angular acceleration of 20rad/sec^2

66. ## Mechanics

An aeroplane propeller has a 100kg and radius of gyration of 0.6cm.find its moment of inertia.How large a torque is required to give it angular acceleration of 20rad/sec^2

67. ## Mechanics

An aeroplane propeller has a 100kg and radius of gyration of 0.6cm.find its moment of inertia.How large a torque is required to give it angular acceleration of 20rad/sec^2

68. ## Mechanics

An areoplane propeller has a 100kg and radius of gyration of 0.6cm.find its moment of inertia.how large a torque is required to give it angular acceleration of 20rad/sec^2

69. ## english

what are the answer to these questionBased on what you have read so far, what is the one thing that always changes when a scene changes in The Diary of Anne Frank? (1 point) the Franks’ reason for hiding the passage of time the use of voiceover for

70. ## Mechanics

Find the moment L about a perpendicular axis through the rod at a distance L/3 from the centre of mass.

71. ## Mechanics

Find the moment L about a perpendicular axis through the rod at a distance L/3 from the centre of mass.

72. ## maths

Given equation F=9/5c+20 find f-intercept

73. ## Chemistry

How much acid is needed to neutralize a 5L solution with a pH of 12.5. The acid available is 1 N HCL.

74. ## Differential Equations

y'=2x+y. Find a solution whose graph is also an isocline.

75. ## Mechanics _ physics

A wheel rotating with an angular velocity of 16rad/sec is slowed to an angular velocity of 4rad/sec by an angular acceleration of 2rad/sec^2.find a. The angle turned in the process of slowing down b. The time required

76. ## Mechanics _ physics

A uniform bar 1m long is pivoted at the centre has a mass of 3kg. It is acted upon by a conquer which cause to possess an angular acceleration of 6rad/sec^2; calculate a. The moment of inertia of the bar b. The torque on the bar

77. ## health

In 2004, which ethnic or racial group was at a lower risk of suicide for people ages 65 or older? A. Hispanics B. Asian and Pacific Islanders C. Non-Hispanic Blacks D. Non-Hispanic Whites c

78. ## Math

I have a question. If a classroom has a party but then 2 more classrooms of 20 each come and do the party with them then how many party things will they need more? Fyi all the classrooms have 20 in them

79. ## trig

a lighthouse is located at point A. a ship travels from point B to point C. At point B,, the distance between the ship and the lighthouse is 7.5km. At point C the distance between the ship and the lighthouse is 8.6km. Angle BAC is 58 degrees. Determine the

80. ## World history; Check:P

Human Origins Essay Write a opinion paper on the most significant consequences of the Agricultural Revolution. The weather climate caused rising temperatures worldwide provided longer growing seasons and drier land for cultivating wild grasses. The

81. ## Algebra 2

Your car gets 25 mi/gal around town and 30 mi/gal on the highway. a. If 50% of the miles you drive are on the highway and 50% are around town, what is your overall average miles per gallon? b. If 60% of the miles you drive are on the highway and 40% are

82. ## Physics

If the force of the road on the car's wheels, pushing it forward, is a constant 3.5 kN, and the car's mass is 2 kg, then how long will the car take to go from 15 m/s to 50 m/s?

83. ## Education

Is concept mapping a type of word processing software that helps with students with special needs?

121. ## math

one last question: find the perimeter of the actual object using the scale factor shown on the blueprint. each side is 3 centimeters long. 1cm=5m

122. ## South America

Spanish Exploration?

123. ## math

find the perimeter of the actual object using the scale factor shown on the blueprint. each side is 3 centimeters long. 1cm=5m

124. ## math

how do I graph this inequality n

125. ## - Social Studies

What might have been the opportunity cost for someone who decide to invest in the stock market in the 1920s?

126. ## physics

Two point charges of the same magnitude but opposite signs are fixed to either end of the base of an isosceles triangle. The electric field at the midpoint M between the charges has a magnitude EM. The field directly above the midpoint at point P has a

127. ## physics

An electric field of 210000 N/C points due west at a certain spot. What is the magnitude of the force that acts on a charge of -6.2C at this spot?

128. ## physics

An electrically neutral model airplane is flying in a horizontal circle on a 2.0-m guideline, which is nearly parallel to the ground. The line breaks when the kinetic energy of the plane is 50 J. Reconsider the same situation, except that now there is a

129. ## physics

Two spherical objects are separated by a distance of 1.41 × 10^-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons.

Identify two companies that you believe integrate corporate social marketing in their overall strategic marketing plan

131. ## science

how can space change your weight in space

132. ## math

solve the system by the elimination method: 3x-2y=2 2x+4y=-5

133. ## Math

Sam needs to cut a piece of sheet metal into 8 pieces. All the cuts are made in the same direction. It takes him 5 minutes to make each cut. How many cuts will Sam make? How would making a table help you find the number of minutes it took Sam to cut the

134. ## Math

The school handyman measured the space needed for a new computer monitor in the science room at 20 3/4 inches. Which of these measures is not more precise? A. 20 1/2 inches B. 20 7/8 inches C. 20 15/16 inches D. 20 21/32 inches

135. ## Maths- very very simple

can someone tell me what the title of this proof is? a^2+b^2=c^2 im writing a paper on the Pythagorean theorem and this is the proof I would use to explain it to someone but idk the name of it. PLEASE help me out here.

136. ## math

solve the system by the elimination method: 3x-2y=2 2x+4y=-5

137. ## math

a ball is thrown into the air at a speed of 96 feet/sec. The equation that expresses the height of the ball as a function of time is: h(t) = -16t2 + 96t + 5 How long does the ball stay in the air after it is thrown? (Round answer to the hundreths of a

138. ## Math

The distance between second and third bases on a regulation baseball field is 30 yards. What is the length in inches?

139. ## World history

"As his power grows, Charlemagne proves himself a mastermind, next to military and civil government." In what ways?

140. ## Math

Tennis has 2 players,basketball 5 Fabio says that there are 3 times as many peoplein a basketball team as on a tennis team. Is he correct? Explain

141. ## maath HELPPPP

a ball is thrown into the air at a speed of 96 feet/sec. The equation that expresses the height of the ball as a function of time is: h(t) = -16t2 + 96t + 5 How long does the ball stay in the air after it is thrown? (Round answer to the hundreths of a

142. ## Math

Step by step convertion of inches to miles

143. ## Math

The school handy man measured the space needed for a new computer monitor in the science room at 20 3/4 inches. Which of these measures is NOT more precise? A. 20 1/2 inches B. 20 7/8 inches C. 20 15/16 inches D. 20 21/32 inches

144. ## math

Simplify using Pascal's Triangle: state a term number of formula and a value. What term number (Tn,r)is your answer? find the sum of row 12? I know that the sum is 2^12=4096, how would you find the term number?

145. ## Education/Technology

We anticipate that the next technology revolution will be A) virtual reality. B) wireless computers. C) voice input technology. D) 3-D images. I think the answer is C, is this correct?

146. ## Education/Technology

To get instant feedback for assessment, such as physical education fitness, a music lab activity, or reading competency, students have been shown how to use A) scanners or punch cards. B) handheld computers or PDAs. C) desktop or laptop computers. D)

147. ## Education/Technology

Syllabi, class outlines, and discipline reports are practical applications of A) systems procedures. B) spreadsheet functions. C) database functions. D) word processing packages. I answer is C, it sounds where all three of these would be, is this correct?

148. ## Science

Can you please tell me the effects of human activities on ecosystems. Example Human Activity and Consequences....

149. ## Education/Technology

The type of software that uses fields, records, and files to organize and display data is A) classroom management software. B) electronic spreadsheet software. C) database management software. D) word processing software. I think this is C, to me it makes

write greater than, lesser than, or equal: 25 cents --------------- 3/10 of a dollar.

151. ## math

0.45 divide by 36

A 16 wheler truck has 16 tires. The cab of a 16 wheeler has 6 tires. how many tires are on 11 truck cabs?

153. ## Education/Technology

Productivity software that allows the student to create professional-looking pages with text, graphics, digital pictures, stylized headlines, and professionally prepared design elements is called: A) Desktop publishing software. B) Spreadsheet software. C)

154. ## math

if the ratio of boys to girls is 3/4 and there are 49 students how many boys are there?

155. ## Education/Technology

What software features are important in selecting classroom management software, based on the classroom academic software evaluation rubric? A) The list includes grade level, documentation, cost, help features, and ease of installation. B) The list

156. ## social studies

confucianism lost influence because__________ the sui and early tang dynasties . people wanted a more _________ escape that promised _________ from _________ (plz helppp)

157. ## Science

Is it bad to use the computer if you have the flu? My head hurts because of the flu but will it be worse if I use the computer?

158. ## Math

Adam wants to compare the fractions 3/12, 1/6, and 1/3. He wants to order them from least to greatest and rewrite them so they all have the same denominator. Explain how adm can rewrite the fractions.

159. ## Applied Calculus

Find the derivative of the function. g(t) = ((8t + 10)^2)*(((10t^2) - 7)^-3) I am supposed to use The Chain Rule. However, I am confused as to how to do this.

160. ## Math

A mother of triplets wants to buy gum balls the machine has two colors how much will it cost to get three gum apps the same color ?

161. ## Phtsics

Two identical point charges are separated by a distance of 3.0 cm and they repel each other with a force of 4 X 10^-5 N. What is the new force if the distance between the point charges is doubled?

162. ## morrisville

Problem 3: Baggage Name your source code file Bags.py. You will write a program that simulates the actions of luggage handling for a large aircraft. As bags arrive they are loaded into containers. Each bag has a different weight and each container can hold

163. ## Speech 09

I'm posting this question again I really need to know if i am right or wrong please help Place the correct letter next to the item that matches it. A. Physical Barrier B. Mental Barrier C. Cultural Barrier D. Empathic Listening E. Listening for Information

164. ## World history; Check:P

How's this so far? :) I kind of tried my best. Indo - Europeans Essay How did the religion of the Hebrews differ from many of the religions of their neighbors? Hebrews were monotheists they prayed to only one god, unlike their neighbors. Their neighbors

165. ## algebra 1

A ball is tossed upward with an initial velocity of 14.2 meters per second. The equation below shows the velocity (v) of the ball after t seconds. v = –9.8t + 14.2 After how many seconds is the velocity 0 meters per second? Round the answer to the

166. ## Math

Adam used 3/12, 1/6, and 1/3 to make a circle graph and colored each a different color. What fraction of the graph is not colored? Explain your answer.

167. ## Physics 212

Three equal point charges, each with charge 1.50\mu C , are placed at the vertices of an equilateral triangle whose sides are of length 0.300m . What is the electric potential energy U of the system? (Take as zero the potential energy of the three charges

168. ## Pre-Cal

The Kit Carson County Carousek makes 3 revolutions per minute. A.) Find the linear velocity in feet per second of someone riding a horse that is 22.5 feet from the center. B.) The linear velocity of the person on the inside of the carousel is 3.1 feet per

169. ## Science

I am doing a research project on The Bermuda Triangle. I need to answer three questions but I cannot think of any good research questions for The Bermuda Triangle, any ideas? Thanks!

170. ## Biology

what molecule is released before acetyl coa enters the krebs cycle Doing cross word puzzle 13 spaces cant figure it out?

171. ## biology

embedded protein in the electron transport chain where h+ ions flow back into the matrix of the mitochondria 11 spaces sixth letter is n cant figure it out?

172. ## Drama

I'm just wondering why are the senses important in drama?

173. ## English

Anyone know any quotes with adverbs in them?

174. ## biology

where do h+ ions accumulate in the mito chondria? 18 spaces 17th letter is c cant figure it out?

175. ## math

solve x (proportion) 2r:3t= x:6a

176. ## math

how many different rectangles have an area of 5 square units?

177. ## algebra 1

The formula used to convert temperature measurements from degrees Celsius (C) to degrees Fahrenheit (F) is shown below. F = 9/5C + 32 What is the Fahrenheit equivalent of 25 degrees Celsius? Round the answer to the nearest degree.

178. ## Algebra

Write the binomial 1 − 27b3 as the difference of cubes.

179. ## Englsih

Can someone please proofread this essay? Totalitarianism Throughout World War 1 there were many totalitarian leaders that wanted to take over of a country. Leaders such as Stallin wanted to take over of a country forcing people to do what they told them to

embedded protein in the electron transport chain where h+ ions flow back into the matrix of the mitochondria Crossword puzzle 11 spaces sixth letter is n cant figure it out?

181. ## English

Neither of the glasses _________ full of juice. A.were B.weren't C.was D.wasn't I think it is C...?

182. ## analytical chemistry

Write balanced net-ionic equations to describe: a. The oxidation of Mn2+ to MnO4- by ammonium peroxydisulfate [(NH4)2S2O8] b. The air-oxidation of HAsO32- to HAsO42- c. The oxidation of Ce3+ to Ce4+ by sodium bismuthate (NaBiO3) Write balanced net-ionic

183. ## algebra 1

The formula for the height of a falling object is shown below, where h is the height of the object in meters, t is the time in seconds, and k is the height, in meters, from which the object began its fall. h = –4.9t² + k If a rock is dropped from a

184. ## math

an urn contains 6 purple marbles and 4 pink marbles. a marble is drawn at random and not replaced. then a second marble is drawn. what is the probability that both marbles are purple?

185. ## algebra

0.15x+0.05(50000-x)=5000

186. ## Math

A bag contains 10 yellow, 15 blue and 5 red Marbles. Mark chooses a candy and doesn't replace it in the bag. Find P (neither blue)

187. ## Science

a 5-kilowatt source powers a motor that is lifting a 30 kg mass straight up. how far will the mass move in 6 seconds

188. ## math

Solve 87-16.45=

189. ## HELP!!!

A light, inextensible cord passes over a light, frictionless pulley with a radius of 10 cm. It has a(n) 24 kg mass on the left and a(n) 6.1 kg mass on the right, both hanging freely. Initially their center of masses are a vertical distance 4.3 m apart. The

190. ## Plane Trigometry

You observe a plane approaching overhead and assume that its speed is 550 miles per hour. The angle of elevation of the plane is 16 degrees at one time and 57 degrees one minute later. Approximate the altitude of the plane.

191. ## Math

Convert 720 inches to miles

192. ## Algebra

A rectangle has width w and its length is 4 units longer than 2 times the width, or 2w + 4. Write a polynomial for the area of the rectangle.

193. ## Maths

The two digits of a 2-digit number add up to 16. The smaller digit is in the ones place. What is the number

194. ## Math

Write the word form for 450, 708 Is it four hundred and fifty thousand, seven hundred and eight

195. ## Algebra

Multiply: (3x-4)² It would be (3x-4)(3x-4). Would the answer be 9x²+16?

196. ## math

the input is 1 output is 2 input is 2 output is 5 input is 3 output is 10 input is 4 output is 17 input is 5 output is 26 what is the rule

197. ## alegebra

what is the square root of the gram molecular weight of O2 and CO2, (hint: periodic table) and which one will diffuse faster?

198. ## Math

Is this correct Find the Range, is it 106 67 23 83 129 23 129-23=106

199. ## Physics

The stored electrical energy of a 350-μ F capacitor charged to 1.20×104 Volts is converted to thermal energy by discharging the capacitor through a heating element submerged in 548.0 g of water in an insulating cup. What is the increase in temperature of

200. ## Physics

A certain substance has a dielectric constant of 2.8 and a dielectric strength of 18.0 MV/m. If it is used as the dielectric material in a parallel-plate capacitor, what minimum area should the plates of the capacitor have to obtain a capacitance of

201. ## Physics

A parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged to Q Coulombs and a voltage of V. (C is the capacitance and U is the stored energy.) Answer the following questions regarding the capacitor charged

202. ## Hattie's Birthday Box

In Hattie's box, the granddaughter smells "a yuong farmer's stubborness, a pioneer mother's sorrow, and a wondrous wild and lasting hope." Name one event in Hattie's life that goes with each one.

203. ## physics

A child on a sled reaches the bottom of a hill with a velocity of 10.0 and travels 23.0 along a horizontal straightaway to a stop.If the child and sled together have a mass of 58.0 , what is the magnitude of the average retarding force on the sled on the

204. ## chemistry

A 3.24-L flask is filled with propane gas (C3H8), at 1.00 atm and -13.5°C. What is the mass of the propane in the flask?

205. ## physics

For a simple 15 upward ramp, what length would be needed for a runaway truck traveling 140 ?

206. ## physics

A skateboarder, with an initial speed of 2.4m/s , rolls virtually friction free down a straight incline of length 19m in 3.5m/s .At what angle theta is the incline oriented above the horizontal?

207. ## physics

An object is hanging by a string from your rearview mirror.While you are accelerating at a constant rate from rest to 30m/s in 5.5s , what angle theta does the string make with the vertical?

208. ## English

Which of the sentences below using direct address is punctuated correctly? A.Please come with me, Sarah, and Tom, to pick Mom’s birthday present. B.Please come with me, Sarah and Tom to pick Mom’s birthday present. C.Please come with me, Sarah, and Tom

209. ## Math

Mr. quark drove his car 314 miles in 6.5 hours. He used 12.7 gallons of gas. Find these rates

210. ## English

Why can there be “a surprising upside to life’s downturns”? A.They can make you a different person. B.They can keep you from becoming stronger. C.They can make you realize that you can get through anything. D.They can keep you from depending on

211. ## physics

Mass m_a rests on a smooth horizontal surface,m_b hangs vertically.If m_a=15.0kg and m_b=8.0kg, determine the magnitude of the acceleration of each block.

212. ## physics

A pulley is suspended by a Cord (C). on one end of the pulley there is a 1.2 kg block and on the other is a 3.2 kg block.Determine the tension in this cord after the masses are released and before one hits the ground. Ignore the mass of the pulley and

213. ## physics

The two masses on either side of the pulley, 2.2 kg and 3.6 kg, are each initially 1.8 m above the ground, and the massless frictionless pulley is 4.8m above the ground.What maximum height does the lighter object reach after the system is released? [Hint:

214. ## Physics

A parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged to Q Coulombs and a voltage of V. (C is the capacitance and U is the stored energy.) Answer the following questions regarding the capacitor charged

223. ## math

Which would be more beneficial for someone (who intends on going to a university) to take senior year of high school: AP Statistics or AP Calculus?

224. ## chemistry Emergency TEST

1.How many moles of sodium oxide are produced when3.9 moles of sodium combine with excess oxygen. 2. Sodium chloride decomposes into elemental sodium and elemental chlorine.How many grams of chlorine will be produced if 39.4 grams of sodium chloride

225. ## Spanish

1. Of the following verbs, which is a stem-changing verb? A.) merendar B.) beber C.) estudiar D.) sacar 2. We call these verbs stem-changing because A.) they have stems, leaves and petals. B.) they have a spelling change in the first part of the verb in

226. ## math

mudd flats is shaped like a rectangle 9 mi long and 4 mi wide. the town has a population of 66,290. find the population per square mile?

I have no idea how to do these. Will somebody please help. Thank you so much. 3. Fill in the blank with the correct verb form: yo/pensar. Yo __________ 4. Fill in the blank with the correct verb form: ella/entender. ella __________ 5. Fill in the blank

228. ## Pre Algebra

Mike spent $40 at the music store. He bought a cd for$20 and some cassettes for \$4 each. How many cassettes did mike buy?

229. ## Life Orientations

Human factor that cause ill health?

230. ## Math help

If 20 3rd graders owned birds, how many third graders were surveyed? Reptiles 5% Birds 5% Fish 10% Cats 35% Dogs 45% I did 5% of 30 = .05 x 30 = 1.5 30/1.5 = 20 third graders BUT I am thinking I am doing something wrong? Where did I go wrong? Should it be

Will somebody please help? I don't know spanish that well. Thanks you. 14. Choose the most logical completion for the sentence. _________ la puerta. A.) Pienso B.) Pierdo C.) Cierro D.) Entiendo 15. Choose the most logical completion for the sentence.

232. ## physics!

In order to measure the length of a long flourescent ceiling lamp, a student makes a very small hole in a piece of paper, holds the paper above the floor, measures the distance between the hole and the floor, and finally measures the length of the light's

233. ## physics.........

The waterfall "Angel Falls" in Venezuela is the world's tallest at h=979 m. Assume that the water's velocity on the top of the falls and on the bottom of the falls (after it hits the ground and begins to flow away) is equal, and that no total energy is

234. ## physics..............

If you ever watch track and field at the Olympics, you'll notice that the starting points of the runners are not even if the race is run on a curve and the runners have to run in lanes. This is to offset the fact that the distances along each lane are

235. ## Math

the base of a triangle is the same as the height. what least whole number measurement for the triangle so that the area would be greater than144^2

236. ## jones

I have a unscramble analogies worksheet that I can't answer. Here are the analogies: ________:judical branch [eempusr ructo] radius:______[meeairtd] brass instruments:_____[stoaercrh] _______:poem[anzsat] _______:pants[bowaerrd] thank yo