# Questions Asked onJanuary 30, 2014

1. ## Science-check my answers plz

Which of the following explains why sunlight is important to aquatic ecosystems? Sunlight provides a source of heat energy to increase water temperatures. Sunlight keeps harmful bacteria from taking over aquatic ecosystems. Sunlight makes it possible for

2. ## Physics

A ball player catches a ball 3.33s after throwing it vertically upward. a) with what speed did he throw it? b) what height did it reach?

3. ## math --- 2 questions!

help pls!!! i am confused!! can you check to see if these are right!?? 4. List all of the quadrilaterals with exactly one pair of parallel sides. (1 point) parallelogram; trapezoid rhombus; parallelogram; rectangle trapezoid rhombus; square; rectangle 5.

4. ## science --- check my answers!

help pls asap!!!!! check my answers!!! 4.) A certain object has a volume of 25.0 mL and a mass of 100g. What is the density of the object? a)0.250 g/mL b) 4.00/mL*** c)125 g/mL d) 2500 g/mL 5.)Which of the following is a chemical property of aluminum?

5. ## Science

Which of the following determines the type of biome classification that will be made for a particular reason? a. Climate* b. Size c. Mineral deposits d. Number of human settlements

6. ## Math

1. Jacob is baking chocolate chip cookies. The recipe uses 3/4 cup of sugar. Jacob wants to make one half of a batch. How many cups of sugar does he need? My answer is 1/4 cups if sugar. 2. In the fridge, hannah had 2/3 of a quart if milk. She used half of

7. ## AP Chemistry

If 400 mL of 3.2 molar HCl solution is added to 300 mL of 2 molar NaOH solution, what will be the molarity of NaCl in the resulting solution? Answer in units of M

8. ## Science

What is the mass of water that results from combining 2.0 g of hydrogen with 16.0 g of oxygen? 14.0 g (I'm thinking this.) 16.0 g 18.0 g 20.0 g

9. ## physics

A stream of water strikes a stationary turbine blade horizontally, as the drawing illustrates. The incident water stream has a velocity of + 17.4 m/s, while the exiting water stream has a velocity of – 15.0 m/s. The mass of water per second that strikes

10. ## Science

a__has a definite shape and a definite volume

11. ## AP Chemistry

Which one of the following compounds is not a salt? 1. Ca(ClO4)2 2. Fe(NO3)3 3. Cr(OH)3 4. Na2SO3 5. KMnO4

12. ## college chemistry

a 42 piece of ice at 0.0 C is added to a sample of water at 8.0 C. all of the ice melts and the temperature of the water decreases to 0.0 C. how many grams of water were in the sample.

13. ## Calculus

Let g and h be any two twice-differentiable functions that are defined for all real numbers and that satisfy the following properties for all x: I) (g(x))^2 + (h(x))^2=1 ii) g'(x)= (h(x))^2 iii) h(x)>0 iv) g(0)=0 a)Justify that h'(x)=-g(x)h(x) for all x b)

14. ## math

mr. Jackson has 20 quarters. if he gives 4 quarters to each of his children, how many children does mr. Jackson have?

15. ## Science

Which of the following shows the correct order from coldest to hottest average annual temperature? a. Taiga-Tundra-Rainforest-Temperate forest b. Rainforest-Temperate forest-Taiga-Tundra c. Temperate forest-Taiga-Tundra-Rainforest d. Tundra-Taiga-Temperate

16. ## physics

A glass window pane has an area of 3.00 m2 and a thickness of 0.600 cm. If the temperature difference between its faces is 25.0°C, what is the rate of energy transfer by conduction through the window.

18. ## physics

Two point charges lie on the x axis. A charge of 6.2μC is at the origin, and a charge of -9.5μC is at x=10.0cm. What is the net electric field at (a) x=−4.0cm and at (b) x=+4.0cm?

19. ## science

Provide at least two modern examples of how the United States has increased its food production.

20. ## chemistry

a 42 piece of ice at 0.0 C is added to a sample of water at 8.0 C. all of the ice melts and the temperature of the water decreases to 0.0 C. how many grams of water were in the sample.

21. ## Mathematics

city A is 300km due east of city B , city C is 200km on a bearing 123 degree from city B. how far is it from C to H?

22. ## Statistic

1. For this assessment, explicityly state the five steps of a simulation and carry out the simulation. Use the random digit table. A basketball player makes 80% of her free throws. Recently during a very close game, she shot 5 free throws near the end of

23. ## Exponential Growth and Decay

Doctors use iodine-131 to treat some forms of cancer. The half-life of iodine-131 is 8 days. A patient receives a treatment of 12 millicuries. A millicurie is a unit of radioactivity. How much iodine-131 remains in the patient 16 days later?

24. ## ecosystems

Hi, can someone help me? What land biome has the lowest humidity? I guess Tundra. A tundra if I'm not mistaken. There were 4 answers: tundra temperate forest grassland rainforest

25. ## Engineering

Microprocessing chips are randomly sampled one by one from a large population, and tested to determine if they are acceptable for a certain application. Ninety percent of the chips in the population are acceptable.

26. ## physics

A flywheel has a small magnet mounted on it. EAch time the magnet passes the coil, a voltage pulse is generated, which is passed to the c.r.o. The display of the c.r.o. is 10cm wide. The flywheel is rotating at a rate of about 3000 revolutions per

27. ## Physics

On an unknown planet, a pendulum of length 1.5 m swings with a period of 3.3 s. What is the acceleration of gravity on this planet?

28. ## language arts, plays

On October 1, 1956, The Diary of Anne Frank opened simultaneously in seven cities in Germany. At the end of the play, the audience sat silently without applauding. Not long after the play’s opening, Germans began openly expressing remorse for the

29. ## science

A steel block has a volume of 0.08m3 and a density of 7,840kg/m3 what is the force of gravity acting on the block(the weight in water?

30. ## Chemistry

At noon on a clear day, sunlight reaches the earth\'s surface at Madison, Wisconsin, with an average power of approximately 1.00 kJ·s–1·m–2. If the sunlight consists of photons with an average wavelength of 510.0 nm, how many photons strike a 1.30

31. ## math

A pronghorn antelope can travel 105 miles in 3 hours.if it continued at the same speed how far could a pronghorn travel in a 11 hours

32. ## Statistics

The per-store daily customer count (i.e., the mean number of customers in a store in one day) for a nationwide convenience store chain that operates nearly 10,000 stores has been steady, at 900, for some time. To increase the customer count, the chain is

33. ## speed

a train approaching a crossing changes speed from 25 m/s to 10 m/s in 240 s. How can the train's acceleration be described?

34. ## Food Labels

5. The food label law is mandatory for the following foods: a. ready-to-eat foods at a bakery, deli, and/or candy store b. most food except meat and poultry*** c. medical foods d. coffee,tea and spice Thank You.

35. ## Chemistry

What is the mass of sodium nitrate NaNO3 that you would need to add to 250 g of water in order to prepare a solution that is 0.200 molal in NaNO3?

36. ## Math

A rectangular yard measuring 30ft by 35ft is bordered (and surrounded) by a fence. Inside, a walk that is 4ft wide goes all the way along the fence. Find the area of this walk

37. ## AP Chemistry

50.0 mL of an HCl solution with a pH of 3.5 neutralizes 200.0 mL of a Ca(OH)2 solution. What is the molarity of the Ca(OH)2 solution?

43. ## Chemistry

Consider the process where 1.3 moles of ice, initially at -30.0 C, is heated to 140.0 C at constant pressure of 1.00 atm. The molar heat capacities (Cp) for solid, liquid, and gaseous water (37.5 J K-1 mol-1, 75.3 J K-1 mol-1, 36.4 J K-1 mol-1,

44. ## AP Chemistry

If 435 mL of 2.7 molar HCl solution is added to 128 mL of 3.2 molar Ba(OH)2 solution, what will be the molarity of BaCl2 in the resulting solution? Answer in units of M

please check my answers and if there wrong maybe you could tell me the correct one.but thanks anyways. 1. How did the formation of the National Action Party change Mexican politics? A.It ended the one-party system. B.It consolidated power among a few key

46. ## Physics

A bar of gold is in thermal contact with a bar of silver of the same length and area. One end of the compound bar is maintained at 80.0°C while the opposite end is at 30.0°C. When the energy transfer reaches steady state, what is the temperature at the

47. ## physics

A)A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 8.15 m/s at an angle of 19.0o below the horizontal. It strikes the ground 2.50 s later. How far horizontally from the base of the building does the ball

135. ## Calculating Quarts from Pints in a Ratio Help

Can someone please explain the steps to solving this problem without a calculator? Seth drank three pints of water a day for 6 days. How many quarts of water did he drink

136. ## US history

what happened as a result of the Second Bank of the United States not having its charter renewed in 1836??? ***was inflation involved???

137. ## Math

Could you use doubling to multiply 7x3? Explain?

138. ## science

in a gasoline engine, the area in the cylinder head where the air-end and-fuel mixture is burned is called the A. piston B. cylinder c. combustion chamber D. intake valve

139. ## Math

Find a value that satisfies the inequality 0.7

140. ## math

Eighty students took the pre-algebra test and 90% of them scored 85% or higher. How many students scored 85% or higher on their test? How many students scored below 85% on their test?

141. ## Math

Jody deposited $65 into her savings account. The next day, she withdrew$24. how much of her deposit remains in the account?

142. ## chemistry

A certain volume of a gas at 298kelvin is heated such that its volume and pressure are now four times their original value.What is the new tewperature?

143. ## 2nd Order linear ODEs

I'm having trouble solving this problem: For the equation x^(2)y′′ - xy′ = 0 , find two solutions, show that they are linearly independent and find the general solution. Hint: Try y = x^(r). I divided the equation by x^(2) first to simplify it, and

144. ## physics

On a day with a breeze blowing from the west at 8.5km/h, a remote control helicopter, facing north, takes off vertically from a level field at full power. It has a mass of 700g and the propeller generates 10N of thrust when running at full power. Once it

Check My Work (No more tries available) The Book Nook makes four times as much revenue on paperback books as on hardcover books. If last month's sales totaled \$124,300, how much was sold of each type book?

146. ## physics

This question is roughly based on some historical data from tropical cyclone Clare which crossed the WA coast near Dampier in January 2006. It started off as a tropical low north of the Northern Territory and was upgraded to tropical cyclone intensity at 8

147. ## math

rene put 2 blue marbles, 2 green marbles, 2 red marbles and 2 white marbles in a bag, if Rene takes 1 marble out of the bag without looking, what is the probability of rene drawing a blue marble?

148. ## english

Need answers for these about "A Modest Proposal" PLEASE 2. Type of Satire? Horatian or Juvenalian 4. Fiction or non-fiction? 5. Problem = 6. Solution =

149. ## math

gail is cooking a healthy snack. she adds 2/3 cup of raisins and 6/7 cup of peanuts. Estimate the total amount that gail adds.

150. ## math

If the rectangles width is trippled and its length is doubled the perimeter of the new rectangle is 92 centimeter greater than the original perimeter what is the area of the original rectangle?

151. ## English

Can you please give me the answers for the blanks? these are about "A Modest Proposal" 7. Advantages to his problem= (1)_______ (2)gives poor a valuable commodity (3) enlarge treasury or stimulate the economy 8. Speaker thinks reader objections would be

152. ## science

Ship made of iron doesn't sinks but iron nail sinks. Why?

153. ## Math

Two minor league basebal players got a total of 396 hits. Washington has 8 more hits than sanchez. Find the number of hits for each player. Please help!

154. ## EQUVALENT RATIO

Write five equivalent ratios for each ratio. 18 to 8 ?

155. ## college chemistry

DrBob222. when you move ice from zero to final T. Do you add 100 cal.?

156. ## biostaticis

What do each of the following represent? (a) The proportion of persons who test positive for some disease who actually have the disease. (b) The proportion of persons with some disease that test positive for the disease. (c) The proportion of persons who

157. ## English

How would you put the prologue of Romeo and Juliet by William Shakespeare from high style to low style? In other words how would you put slang into it?

158. ## Biology

During the ______ pathway, a host cell infected with a virus lyses and releases new virus particles. During the _______ pathway, viral DNA replicates along with the cell, but new viruses are not immediately produced. Please help!

159. ## Math

Find an equation of the line having the given slope and containing the point. M=-8,(1,8)

160. ## Math

Find an equation of the line having the given slope and containing the point. M=-8,(1,8)

161. ## Math

Find the slope, if it exists, of the following line. X=2/15

162. ## Math

Find the slope, if it exists, of the following line. X=2/15

163. ## science

The Earth is a satellite of the sun? If not can you tell me what it is?

164. ## english

In the sentence "What made you angry?" what part of speech is the word "you"?

165. ## English

Can you please give me the answers for the blanks? these are about "A Modest Proposal" 7. Advantages to his problem= (1)_______ (2)gives poor a valuable commodity (3) enlarge treasury or stimulate the economy 8. Speaker thinks reader objections would be

166. ## EQUVALENT RATIO

Would you do it the same way for 17:6 ? multiply and divide?

167. ## Sweg

Can plants think or something?

168. ## EQUVALENT RATIO

Did I do it right? 17:6 34:12 51:18 68:24 85:30 102:36

169. ## EQUVALENT RATIO

If it's in a fraction like. 15/13?

170. ## math

last year, 2713 teachers attended a technology conference. if there were 163 more men than women at the conference, how many men and how many women attended?

171. ## math

last year, 2713 teachers attended a technology conference. if there were 163 more men than women at the conference, how many men and how many women attended?

172. ## Math

I have a 7 in the tens place a 3 in the hundred thousand place a 4 in the tenths place and a 1 in the thousandths place what number am I?

173. ## Math

I have a 7 in the tens place a 3 in the hundred thousand place a 4 in the tenths place and a 1 in the thousandths place what number am I?

174. ## Is this an area question?

Dory wants to lay down carpet in ta room of her house. The room is rectangular in shape and are 15 feet by 20 feet. How much carpet will she need?

175. ## PHI 103

"~ P v Q" is best read as (Points : 1)

176. ## fractions

how to put 1/4,6/7,3/5 in least to greatest form

177. ## Science

Using concept of Surface Tension, explain why does the detergent cause the effect observed?

178. ## Science

Does ΔT from evaportation increase or decrease with increasing molecular mass? Explain why?

179. ## english

I have to write about person who smokes using three dimensions which are cultural, institution and personal. How should I go about this? Please give me an example. Thanks.

180. ## English

What does this sentence mean? The thorns of the roses and the roses' fragrance equal each other. Does it mean that there is good for the bad, and that it is okay to have the bad because there is enough good?

181. ## Math help

I have a question. How would you solve a system if the variable and number is in front of the equals sign for example : y=3 4y=2x+18 I need help can someone guide me on this?

182. ## English

I am doing descriptive writing. Please read and check my story I need help to write a solid interesting ending. The Unexpected I’m in a hospital bed with my mum gripping her hand onto mine. All I have endured is an extensive amount of excruciating agony

183. ## pre cal

how do you determine the the quadratic function if the problem gives you a graph with the line has points of (-3,5) and (0,-4)?

184. ## 6th grade honor science

having trouble with this question it was fill in the blank it was In a food web, an organism that eats an animal is a blank consumer

185. ## Math

If the cost is 3.00 doars per sq ft to clean a carpet, how much will it cost to clean a carpet 12.5 ft x 23ft?

186. ## math

how many groups of 8 are in 96?

187. ## math

If 3 hexagons and 4 trapezoids cost 200 in total what of is the cost of each piece alone?

188. ## math

There are 480 students enrolled at school and 75% of those students buy their lunch in the school cafeteria. How many students bring their lunch? What percent of the students bring their lunch from home? How many students bring their lunch from home?

189. ## Math Pre-Cal

When I am giving the point vertex of (1,-1) and another point of (2,2) and i need to put the answere in the form f(x)=ax^2+bx+c how would I go about doing that?

190. ## math

1.The land on Earth’s surface is represented by the seven continents. Europe has 77% of the dry land while Africa has 20%. North America has 4/25 and Antarctica has 1/10 of the dry land. What fractional amount of the dry land is contained within the

191. ## math

If 3 hexagons and 4 trapezoids cost 200 in total what of is the cost of each piece alone?

192. ## Algebra II

How do you graph the function y=x^2-4 and how is the graph a translation of f(x)=x^2

193. ## math

solve for d if ddd base 5 = 124

194. ## Math help

How would you solve these systems? I need help 1. X=3 2x-4y=5 2. X=3 4y=2x+18 3. Y=3 4y=2x+18

195. ## chemistry

How many $${\rm m}^{3}$$ are in 7.40 $${rm cm}^{3}$$?

196. ## Math

When you subtract 2 from a number, double the difference, and then add 7 you get 57. What is the number? And any explanation. Thank you

197. ## Biology- Scientific Method

An experimenter sets out to find out how many hours of sleep a dog needs in order to catch the highest number of balls without a bounce. To test this the experimenter uses 5 dogs in the experiment and allows each dog to sleep a predetermined amount of

198. ## math

If 3 hexagons and 4 trapezoids cost 200 in total what of is the cost of each piece alone?

199. ## pre cal

f(x)=2x^2+12x-6 what is the min or max value ?

200. ## health

Do you think that the HIPAA has been effective?

201. ## math

If 3 hexagons and 4 trapezoids cost 200 in total what of is the cost of each piece alone?

202. ## Civics

What role do precedents play in our legal system? Help would be appreciated!! :-)