# Questions Asked onOctober 23, 2010

1. ## chem

For the elementary reaction NO 3 + CO → NO2 + CO 2 the molecularity of the reaction is __________, and the rate law is rate = __________. A) 2, k[NO 2][CO 2] B) 2, k[NO 3][CO]/[NO2 ][CO 2] C) 4, k[NO 3][CO][NO 2][CO 2] D) 4, k[NO 2][CO 2]/[NO 3][CO] E)

2. ## Chemistry

Determine whether each of the following salts will form a solution that is acidic, basic, or pH-neutral? Al(ClO4)3-Acid LiCl-Neutral KClO2-BAse C6H5NH3NO2-Acid CH3NH3Br-Acid KCl-Neutral NaClO-Base NH4ClO-Acid Fe(ClO4)3-Acid C2H5NH3NO3-Acid Is this right?

3. ## Physics

A stone is dropped from the top of a cliff. It is seen to hit the ground below after 3.90 s. How high is the cliff?

4. ## Chemistry

I am doing a lab online and have no clue on how to get started with the following questions? Please Help me! 1. Calculate and record the following (in grams): (a) mass of NaCl by subtraction of other components: (b) measured mass of NaCl after boiling away

5. ## physics

A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to six times her weight as she goes through the dip. If r = 20.0 m, how fast

6. ## chemistry

strontium nitrate reacts with potassium iodate. What is its molecular,ionic and net ionic equations?

7. ## physics

When a person stands on tiptoe (a strenuous position), the position of the foot is as shown in Figure P8.16a. The total gravitational force on the body, Fg, is supported by the force n exerted by the floor on the toes of one foot. A mechanical model of the

8. ## college

Here are heart rates for a sample of 30 students before and after a class break. At α = .05, was there a significant difference in the mean heart rate? (a) State the hypotheses. (b) State the decision rule and sketch it. (c) Find the test statistic. (d)

9. ## Physics

A car travels at a constant speed around a circular track whose radius is 2.9 km. The car goes once around the track in 380 s. What is the magnitude of the centripetal acceleration of the car?

10. ## physics

Mass mA rests on a smooth horizontal surface, mB hangs vertically.If m_{\rm{A}}=13.0 kg and m_{\rm{B}}=3.0 kg in the figure , determine the magnitude of the acceleration of each block.

11. ## Chemistry

Which of the following anions act as weak bases in solution? ClO4- ClO- C2H3O2- Cl- I think its ClO4- and Cl-

12. ## math

Given: segment AC and segment BD bisect each other at E prove: E is the midpoint of segment RS i don't know if you will be able to visualize the picture but just incase someone is i really need help on the proof for this one. Picture: two(supposedly

13. ## physics

There is a clever kitchen gadget for drying lettuce leaves after you wash them. It consists of a cylindrical container mounted so that it can be rotated about its axis by turning a hand crank. The outer wall of the cylinder is perforated with small holes.

14. ## Chemistry (Organic)

What is the molecular formula for an alkane with 12 carbon atoms? (Type your answer using the format C2H4 for C2H4.) so this problem might be easy because its the first question on my webassign but my teacher hasn't started teaching this yet but it is up

15. ## physics

How long does it take a plane, traveling at a speed of 170 m/s, to fly once around a circle whose radius is 2900 m?

16. ## chemistry

there are 3 naturally occurring stable isotopes of oxygen:O-16,O-17, O-18. there are 2 naturally occurring stable isotopes of hydrogen: H-1, H-2.how many different water molecules can be made using the various combination's of all the isotopes of hydrogen

17. ## science

Do plants grow better with tap water or distilled water?

18. ## 9th

The electricity costs of a business increased from $18,000 one year to$19,000 the next. To the nearest whole percent, what was the rate of increase?

19. ## Statistics - M/C

14. The marks on a statistics test are normally distributed with a mean of 62 and a variance of 225. If the instructor wishes to assign B’s or higher to the top 30% of the students in the class, what mark is required to get a B or higher? a. 68.7 b. 71.5

20. ## Physics

A crate has a mass 24 kg. What applied force is required to produce an acceleration of 3m/s^2 if the frictional force is 90 N.

21. ## Physics

An engineer is designing a runway for an airport. Several planes will use the runway and the engineer must design it so that it is long enough for the largest planes to become airborne before the runway ends. The largest plane accelerates at 3.30 m/s2 and

22. ## Science

which of the following are predicted by the molecular orbital model to be stable diatomic species N22-, O22-, F22-

23. ## math

Carla spends 6/4 hours exercising everyday for 12 days.She spends 1/2 of her exercise time everyday lifting weights.How much time does Carla spend lifting weights during the 12 days? I think the answer is this: 6/4hrs.=360min. The answer is 90 hours or 540

24. ## Finance

Suppose you own a stock in a company. The current price per share is $25. Another company has just announced that it wants to buy your company and will pay$35 per share to acquire all the outstanding stocks. Your company’s management immediately begins

25. ## Chemistry

Which has a larger radius, the oxygen atom (O) or oxygen ion (O-2) ? Explain. Isn't the ion bigger because negative ions are bigger than atom's radius. im not sure though.

26. ## algebra II

If a pro basketball player has a vertical leap of about 25 inches, what would his hang time be? Use V=48T^2 Answer:_______seconds.

27. ## physics

Two identical cars are traveling at the same speed. One is heading due east and the other due north, as the drawing show. What is true regarding the kinetic energies and momenta of the cars?

28. ## Physics

A 0.130 kg baseball, traveling 35.0 m/s, strikes the catcher's mitt, which recoils 11.0 cm in bringing the ball to rest. What was the average force (in newtons) applied by the ball to the mitt?

What is a good thesis statement on the destruction of world due to food we eat for my critical analysis paper?

30. ## English

I have some doubts concerning a few sentences. I really hope you can check them. Thank you very much in advance. 1)I did rhythmic gymnastics two years ago but I had to give it up to prepare for (?) my school-leaving exam. 2)My favourite book is "Heart of

31. ## chemistry

for the reaction: c3h8+5o2=3co2 +4h2o how many moles of o2 will be produced in the complete combustion of 0.75 moles of c3h8? I think the ans is 2.25 moles of co2, but i am not sure because i still don't think I understand this fully please help

94. ## Physics

A 3.0 kg object, moving with a constant velocity of 3.0 m/s, is acted upon by a force of 11 N in the direction of the motion for 4.0 s. What is the velocity (in meters/second) of the object at the end of this time?

95. ## poetry

How does the poem: "A dream within a dream" by: Edgar Allen Poe, correspond to the Pre-Civil war/American Culture?

96. ## Calculus

int(dx/(x^2+9)) u = x/3 Use the indicated substitution (above) to evaluate the integral. Confirm answer by differentiation. Okay, so I found that du/dx is 1/3. dx is 3du. Just by looking at the integral I can tell this is some form of tan^-1(x), if we

97. ## science

How often do you water basil?

98. ## Writing

I'm trying to cite an article from edu.udym. Should I put edu.udym on the citing or should I add the dot com to the end?

99. ## Physics

A brick of mass 1.0 kg slides down an ice roof inclined at 30 degrees with respect to the horizantal. If the brick starts from rest, how fast is it moving when it reaches the edge of the roof 0.90s later? Ignore friction

100. ## chemistry

Chart of energy changes dissolving MgSO4, NaOH and CaCl2.

101. ## Finance

Your 401 (k) Account at East Coast Yachts You have been at your job for East Coat Yachts for a week now and have decided you need to sign up for the company’s 401(k) plan. Even after your decision with Sarah Brown, the Bledsoe Financial Services

102. ## math

How are the ideas of subsets and proper subsets used in counting to identify relationship between whole numbers?

103. ## economic help

whats the effect of current economic on foreign companies and factory closures and what do they also mean? plus i need articles to write about each one of them... Im having a hard time looking for the right one

104. ## poetry

Does the books: "The Scarlet Letter", "The minister’s Black Veil", and "Young Goodman Brown" correspond to the Pre-Civil/American culture??....if it even does, if not explain PLEASE!!!

105. ## Physics

A 4.5 104-kg space probe is traveling at a speed of 15000 m/s through deep space. Retrorockets are fired along the line of motion to reduce the probe's speed. The retrorockets generate a force of 3.0 105 N over a distance of 2400 km. What is the final

106. ## chemistry

How do you know the number of ions present in a compound.

107. ## Statistics

19. George got 70% on an economics exam where the mean was 55% and the variance was 9. If a professor wishes to change the distribution of marks so that they have a mean of 70% and a standard deviation of 5, what will George’s new mark be? a) 95% b) 85%

108. ## physics

A person pulls a toboggan for a distance of 20.0 m along the snow with a rope directed 25.0° above the snow. The tension in the rope is 85.0 N. (a) How much work is done on the toboggan by the tension force? (b) How much work is done if the same tension

109. ## Math

I need help with this problem: 6/v-1=6/(v-3) I tried working it out like this: >>>6/v-1=6/(v-3) >>>(6-v)/v= 6/(v-3) I cross multiplied to get: >>>3v+18-v^2= 6v >>> -3v+18-v^2=0 ^Here's where I became stuck. I would appreciate it if you would point out

110. ## Stats

A test has 15 true or false questions and 10 multiple choice questions (each with 4 choices). All questions are weighted equally. Jack has not studied at all for the test and randomly guesses. 1. What is the probability that Jack gets 96% on the test? a.

111. ## chem

help with this problem pease Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A piece of metal at a temp of 101.0oC and a mass of 86.0 g is dropped into a beaker of water containing 75.0

112. ## phy

A 12N force is applied to a 20kg door If a frictional torque is present what will be the angular acceleration of the door The door is 80cm wide and I=1/3ml^2.

113. ## Chemistry

Which of the following anions act as weak bases in solution? ClO4- ClO- C2H3O2- Cl- I think its ClO4- and Cl-

114. ## CHEMISTRY

1.0 g of fat has 9kcal/g, while 1.0 g of carbohydrates and protein have 4kcal/g each, determine the total amount of Calories (kcal) in 1 serving if that serving contains 20.0 g of carbohydrates, 20.0 g of protein and 15.0 g of fat

115. ## Math Approximation fractions

I really don't understand how to determine which number is greater and which one is smaller can anyone help auorlda ?

116. ## Physical science

A chair lift holding a 100 kg man rises 5 meters in height in 10 second time period. Ignore the weight of the chair and related machinery and answer the following: How much power is required, in Watts?

117. ## Physics

A skier goes down a slope inclined at 25 degrees. Her mass including equipment is 60.0kg. a. What is her acceleration if friction is negligible? b. What is her acceleration if friction is 45.0 N?

118. ## physics

A small first aid kit is dropped by a rock climber who is descending at a constant velocity of - 1.3m/s. a) Sketch the velocity vs. time graph for both the climber and her first aid kit and paste your sketch in the space below. b) After 1.5 seconds, what

119. ## Physics

Two students are on a balcony 29.4 m above the street. One student throws a ball vertically downward at 14.7 m/s. At the same instant, the other student throws a ball vertically upward at 29.4 m/s . The second ball just misses the balcony on the way down.

120. ## Physics

If a car starts from rest and travels for 5.0 seconds with a uniform acceleration of +1.5 m/s2. The driver then applies the brakes for 3.0 seconds, causing a uniform acceleration of - 2.1 m/s2. a) Sketch the velocity vs. time graph for the car and paste

121. ## Physics

A 0.130 kg baseball, traveling 35.0 m/s, strikes the catcher's mitt, which recoils 11.0 cm in bringing the ball to rest. What was the average force (in newtons) applied by the ball to the mitt?

122. ## chemsitry

b. The decomposition reaction may be written in this form: C12O36H20N12 (s) → 12CO2 (g) + O2 (g) + 6N2 (g) + 10H2O (l) In the enthalpy diagram below, the arrows represent standard enthalpy reactions. (3) denotes the standard enthalpy of decomposition of

123. ## chemsitry

c. Use the enthalpy diagram provided above and apply Hess’s Law to determine the standard enthalpy of formation for C12O36H20N12 (s) using the results from part (a) and the following values: The standard enthalpy of formation of gaseous carbon dioxide is

124. ## Physics

Suppose that the coefficient of kinetic friction of the rubber of a car tire and the street is Uk = 0.8. What is the deceleration of the car on a flat street if the driver brakes sharply, so all the wheels are locked and skidding?

125. ## science

what will you measure to record data of the experiment of mixing water and sugar/salt dissolved in hot water?

126. ## Chemistry

Chlorine and phosphorus FOrmula ___________ ? Name ________ , _________ ?

127. ## chemistry

if k2O, SrO, and Al2O3 are all correct formulas, predict the formulas for the oxides of Rb, Mg, & Ga. i think the answers are Rb2O, MgO,& Ga2O3 but im not sure why

128. ## science

In addition to the salt/sugar question, what will you use and what unit of measure will you place on the y axis of the bar graph for quantitative measurement? Also, which factors are controlled to make the experiment fair?

129. ## Brian

A stock has an expected return of 15 percent, its beta is 0.4, and the risk-free rate is 6.75 percent. The expected return on the market must be ?percent. This sample give the ERM as 0.2738 but dosent give the formula. What would the formula be?

130. ## Journalsim

What is a GREAT way to start off my first paragraph of my article about "Habitat for Humanity"?

131. ## English

Please expedite in providing all necessary documents. Is this sentence grammatically correct?

36z^2 -49

133. ## U.S. Government

1st Amendment help. How can one argue persuasively that the status quo of Defamation (i.e., New York V. Sullivan) should be changed. Any help or direction one could give, would be appreciated.

134. ## ECE Home,School, and Community

Describe three issues related to role confusion that a teacher may feel or communicate

135. ## math axis of symmety

What is the equation of the axis of symmetry of the graph with the order pairs of (-2,0) and (6,0). How would I do this since? I thought perhaps I could do -2+__=6 which would be 8 then 8/2 =4 so x=4 my brother says I'm suppose to do 6-2=4/2=2 so x=2 who's

136. ## science

Give the condensed structural formula for 1-butanol. (Type your answer using the format CO2 for CO2.)

137. ## physics

A daredevil leaves the end of a ramp with a speed of 32.0 m/s if his speed is 29.8 m/s when he reaches the peak of the path, what is the maximum height that he reaches? how do i do thiss?

138. ## english

Can someone explain what is the difference between a connotation and denotation?

139. ## physics

A daredevil leaves the end of a ramp with a speed of 32.0 m/s if his speed is 29.8 m/s when he reaches the peak of the path, what is the maximum height that he reaches? how do i do thiss?

140. ## Science

I have to make a book about Potassium. What are some cool wasy a can make a book from scratch?

141. ## Math

There are 10 packets of ham. Of the packets, 2/5 are turkey ham. Each packet of turkey ham weighs 1/3 pound. What is the total weight of the turkey ham?

142. ## medical law and ethics

You are a health care professional working in a large office. Your administrator has asked you to prepare a poster summarizing the public duties of the physician as specified by law. The poster will be set up in the waiting room and will have a heading "We

143. ## Statistics

1. A spinner has four outcomes Three outcomes have the same probability and the fourth is half as likely. 2. A spinner has three outcomes, each half as likely as the one before it.

144. ## Statistics - M/C

In a version of the game of roulette, a steel ball is rolled onto a wheel that contains 19 red, 19 black and 2 green slots. If the ball is rolled 25 times, the probability that it falls into the green slots two or more times: a) is 5%. b) is 35.8%. c) is

145. ## Stats

Twenty-three students wrote a statistics examination having a maximum of 50 marks. The mark distribution is given in the following stem-and-leaf diagram: 0 9 1 25 2 01335889 3 001369 4 02248 5 0 Q1 is equal to: a) 15 b) 21 c) 23 d) None of the above THE

a=14% protein in soybean b=7% protein in cornmeal how many pounds mixed together to get 280lb mixture that is 9% protein a= ____lbs soybean b= ____lbs cornmeal Thank you from the bottom of my heart,

Can you recommend a site that will show how to divide whole numbers by fractions or give me an example.

148. ## Calculus 2

I am having so many problems with these volume problems, 1. Find the volume of a the solid obtained by rotating the region enclosed by: x = 2y and y^3 = x with y>0 about the x axis 2.Find the volume of cone of height h = 250 and a circular base with radius

149. ## government

Make a list of 5 to 7 social problems that you believe are the most critical for the United States to address. Write one to two sentences describing the extent of each social problem.

159. ## physics

A 49.7-cm diameter disk rotates with a constant angular acceleration of 2.7 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this

160. ## college

Do some research into why the United States has been so slow to adopt metric measurements. What problems does this cause for the United States? What benefits might it bring the United States? How might you resolve the gap between the United States'

Can you help me to make a speech about 'the importance of recycling' ?

162. ## Math

For every left handed person, there are 4 right handed persons. If there are 30 students in the class predict the number of students who are right handed.

163. ## Art

Choose a contemporary painting, sculpture, or piece of found art that captures your interest. Consider what it is that captures your attention and explain why viewing this piece is a valuable experience. Questions to consider are: 1) What best describes

164. ## math

45 mi/hr = ______ft/sec. Can you show me how to do this? Dimensional analysis?

165. ## statistics

A random variable may assume any value between 10 and 50 with equal likelihoods. (Uniform distribution) Determine the following values for this probability distribution: a) b) c) f(x) = d) P(x < 25) e) P(x > 15) f) P( 12 < x < 30)

166. ## accounting psy100

What parts do they agree or disagree with? How does Rogersâ€™ view compare with that of Maslow and other humanists?

167. ## physics

A small stone of mass m is stuck on the periphery of a wheel of radius R rolling along the x-axis with a constant speed v. The centre of the wheel was at x = 0 at time t = 0, and stone was on the ground at that time. Find the angular momentum of the stone

168. ## Physics

The mass of glider X is 0.2kg and its velocity is 1.5m/s to the right. The mass of glider Y is 0.3kg and it is stationary. When glider X collides with glider Y they move off together. Calculate the velocity of the gliders after the collision and give their

169. ## math

4^3+4^4+4^5+....+4^(n)=4(4(n)-16) all over three *Note: the entire right hand side of the equals sign is over three

176. ## Chemistry

I still don't understand how to do this problem; grams/molar mass I understand, but I need to see the steps CLEARLY. 43. How many moles are in 25.0 grams of potassium? Show your work and round your answer to the appropriate number of significant figures.

177. ## college

what type of study can be produced for : Management of pain in post-surgical patients

178. ## Algebra II

Identify the degree of each term of polyrnomial and the degree of the polynromial 0f -8x^3+8x^2+3x+4. degree of the first term___________. degree of the second tern___________. degree of the third term___________. degree of the fourth term____________.

179. ## algebra II

Convert to decimal notation 8.88 * x10^7

180. ## algebra

If the sides of a square are lengthend by 7cm, the area becomes 121cm^2. Find the length of a side of the orginal square.

181. ## Maths

Our team scored 115 points in the last 5 football games. How many points must we score in the next 5 games so our average points per game is greater than 25? Write inequality?

182. ## AED 201

I am looking for information on the use of technology in school. I need the 1st and 2nd event from 1980, 1990 and 2000. Ive been searching since yesterday. I do not want the answers, just pointed in the right direction. I guess im not searching right or

185. ## Writing

Can you please check my citation? I'm trying to find out if it's correct. "How Deforestation Affects Us." Edu.udym. 11 Aug. 2008.web. 23 Oct. 2010. (I'd put the url if jishka would let me)

186. ## math

choose a benchmark of 10,50, 100, or 1,000 to estimate the number of peanuts in a large bag.

187. ## Maths

Two sides of a triangle are 10 cm and 15 cm. What is the range of possible lengths for the third side? Write inequality?

188. ## social studies

Finding out what your boss expects of you relates to the theory of: leadership. goal setting. human relations. defense mechanisms.

189. ## algebra

In a triangle, find the length of the side not given, B=1,c=~17

190. ## Physics

A force F=180 N pulls a crate at a 60 degree angle on a rough surface. The weight of the crate is 296 N and the friction force between the crate and the surface is 90 N. What state of motion might the crate be in?

191. ## statistics/probability

how many green elements are required to make a legitimate probability distribution if there is a total of 50 elements in this sample? x red blue orange brown green p(x) 0.10 0.10 0.10 0.20 ? * i am not sure but i don't think that any green elements are

192. ## statistics/probability

in testing a new drug. researchers found that 20% of all patients using it will have a mild side effect. a random sample of 14 patients using the drug is selected. find the probability that: a) exactly three will have mild side effects. b) at least four

193. ## math

If Betty puts two heavy cookies on one side than how much will it be? there was a graph it said the biggist # is 3/4oz and the smallest # is 2/4. 3/4+2/4=5/4 Answer :I think it is 5/4

194. ## Statistics

A spinner has three outcomes, each half as likely as the one before it. How can I set this up?

195. ## language

explain what metaphor means 1. At the end of the day, the sun is a freshly ripened orange.

196. ## physics

A boy sledding down a hill accelerates at 1.30 m/s2. If he started from rest, in what distance would he reach a speed of 8.00 m/s?

197. ## Chemistry

What would be a good hypothesis for a lab in which the purpose is to identify the differences between chemical and physical changes.

198. ## chemistry

A radio station's channel, such as 100.7 FM or 92.3 FM, is actually its frequency in megahertz (MHz), where 1 MHz =10^6 Hz}. Calculate the broadcast wavelength of the radio station 98.70 FM. can someone please explain this question for me, i tried several

199. ## social studies

Which of the following is the best example of a cultural norm? The average height of adults How much respect is given to older people The average year-round temperature The age of the civilization

200. ## Algebra

solve and graph: x-2y=-2 x=2y=10

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