# Questions Asked onApril 6, 2013

1. ## Physics (Algebra-based)

A block starts at rest and slides down a frictionless track except for a small rough area on a horizontal section of the track.It leaves the track horizontally, flies through the air, and subsequently strikes the ground. gravity= 9.81 m/s^2.

2. ## Physics

A 500-turn circular coil with an area of 0.050 0 m2 is mounted on a rotating frame that turns at a rate of 20.0 rad/s in the presence of a 0.050 0-T uniform magnetic field that is perpendicular to the axis of rotation. What is the instantaneous emf in the

3. ## Alg 1

The length of a rectangular prism is four times the width. The height of the prism is 8 ft. If the volume of the prism is 160 ft^3, what is the width of the prism? Round to the nearest tenth of a foot. Please solve and explain. Thanks

4. ## Chemistry

Identify the relative molar amounts of the species in 0.10 M NaBr(aq). NaBr, Na+, Br-, H3O+, OH-, H2O

5. ## math

The 9th term of an AP is 8 and the 4th term is 20. Find the first term and the common difference.

6. ## Chemistry

A swimming pool with a surface area of 5 meters by 10 meters contains 88,000 liters of water. The temperature of the water in this pool increases by 2.00 C when it is heated by the Sun for 6.00 hours. Calculate the energy absorbed. 1.1.48×109J

7. ## math

A model of a park was built on scale of 1.5cm to 50m. If the distance between two trees in the park is 150m, what is the distance on the model?

8. ## Math

Simplify the expression (square root) √45/144 Thanks.

9. ## maths

a big wheel of a penny farthing bicycle has a radius of 0.75m work out the number of complete turns the big wheel makes?

10. ## physics

A car travelling 19.4m/s passes apolice car at rest.As it passes, the police car starts up, accelerating with a magnitude of 3.2m/s. Maintaining that acceleration, how long will it take the police car to catch up with the speeding motorist?

11. ## early child hood

14. A child who has not developed a secure attachment with you A. may keep looking your way every time she causes a disruption. B. may repeat the same activity over and over. C. will spend most of her time alone. D. may talk in a loud voice.

12. ## statistics

The data below are the average one-way commute times (in minutes) of selected students during a summer literature class and the number of absences for those students for the term. Calculate the linear correlation coefficient.

13. ## Math

1. If -1/infinity = infinity or -infinity ? 2. If lim x->infinity^- = infinity & lim x->inifinity^+ = -infinity, then lim x->infinity = does not exist. Am i right? If im wrong please tell me the reason why?

14. ## Che2201

What is the difference between rotamer,enantiomer,conformer,atropisomer and configurational isomer?

15. ## grammar English

I am writing about interviewing Deaf Persons for my ASL research paper. The first person is Christian DeGuzman. He is profoundly deaf since birth, and about 2 or 3 years old later they found out that he was deaf that’s why. Christian grew up in Bay Area,

16. ## Math

If a and b are positive odd integers, then prove that one of (a+b)/2 and (a-b)/2 are even or odd number. I mean in the above numbers one is odd and one is an even number.

17. ## Math

The weather forecast states that there is a 70% chance of rain tomorrow. Which of the "definitions" of probability is relevant to this statement and explain why?

18. ## Lincoln College Of New En

26 Gasoline Mileage for Autos and Trucks – Of the top 10 cars and trucks based on gas mileage, 4 are Hondas, 3 are Toyotas, and 3 are Volkswagens. Choose one at random. Find the probability that it is Japanese, Japanses or German or not foreigh.

19. ## physics

A 2 N neuton force is applied to a a2.5 Kg dry ice puck that moves frictionlessly across a desktop. If the puck starts at rest, how fast will it be moving after the force is applied? If the puck were moving at 0.6 m/x, how long would it take to bring the

20. ## trig

If it is given that tan(A-B)=tanA-tanB/1+tanAtanB and tanP-1/1+tanP=tan195 find p

21. ## Quantum Physics

Consider a particle whose wavefunction at some fixed time t is represented by -A if -2≤x≤0 ψ(x)= A if 0≤x≤3 0 otherwise (a) What is the normalization constant A? (b) What is the probability of finding the particle at a position x≤0? (c) What is

22. ## chemistry

a human being requires 2700kcal of energy per day.if enthalphy of glucose is-1350kcal/mole,how many grams of glucose a person has to consume every day :

23. ## physics

Jenny is riding on a bus. She has been unable to find a seat and so she is standing in the aisle. Explain, in physics laws and principles, why it is important that she hold onto something while she is completing her journey.

24. ## chimestry

if the volume of the vapor had been assumed to be 125ml instead of your measured volume,what would have been the percent error in your report? molar mass of the compound?explain

25. ## Math

1. If -1/infinity = infinity or -infinity ? 2. If lim x->infinity^- = infinity & lim x->inifinity^+ = -infinity, then lim x->infinity = does not exist. Am i right? If im wrong please tell me the reason why?

26. ## chemistry

A solution is made by dissolving 15.5 grams of glucose (C6H12O6) in 245 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m? Show all of the work needed to solve this problem.

27. ## Physics

in the moments before you hit a truck, you decide to calculate the impulsive force (impulse) you will feel. you and your bike have a combined mass of 120kg and the truck brings you to a halt in 0.3s. What is your impulse?

28. ## chemistry

True statement for Catalyst ___________ I. make a spontaneous reaction is not spontaneous II. accelerate the reaction forward and slow reverse reaction III. lowering the activation energy of the forward reaction IV. lowering the activation energy of the

29. ## algebra

A rectangular picture is 2 inches longer than it is wide. When a frame 3 inches wide is placed around the picture, the area covered by the picture and frame is 168 square inches greater than the area covered by the picture alone. What are the dimensions of

30. ## chem

A certain constant-pressure reaction is nonspontaneous at 37°C. The entropy change for the reaction is 83 J/K. What can you conclude about the sign of ÄH? What can you conclude about the magnitude of ÄH?

31. ## Chemistry

i. Which of the following solutions has the lowest pH (more acidic). Explain you answers. a. a 0.1 M solution of a strong acid or a 0.1 M solution of a weak acid. b. a 0.1 M solution of an acid with Ka=2×10-3 or one with Ka=8×10-6 c. a 0.1 M solutions of

32. ## Calculus (Gr.12) Math

I am not sure how to do this question I know I have to take the derivative but then I am left w/ to unknowns. If a projectile is shot up hill the distance (range) of the landing point up the hill depends on the initial speed of the projectile,v, the angle

33. ## History 204 american history 1865-present

Gradually, over the first two decades of the 20th century, the suffrage movement gained momentum. Which of the following women was least associated with this movement over its entire history dating back to the 19th century? Carrie Chapman Catt, Alice Paul,

How many main points in a speech?

35. ## algebra

what is the opposite of -12 3/4 -12 is the whole number what is the opposite of that is it 51/4

36. ## writing

how can i reword this differently Free will is God’s indispensable gift to humanity, and we must allow ourselves to be open to salvation in light of the choices we make.

37. ## algebra

How do I solve this problem? 3x-2/3x=4/3

38. ## Phi 103

In the conditional "P →Q," "P" is a

39. ## Physics

For this problem, you are allowed to consult with other members of the class, but not with faculty and not with anyone outside the course. Simplify all your expressions. A car of mass, 2m, is going around a turn at a constant radius, R, with velocity, v0.

40. ## Inequalities.please a needy help here!!

solve and graph y>2x-1

41. ## Math

1. A certain airline has 10 flights a day from N.Y. to Chicago. From chicago there are 8 flights a day to L.A. Can you conclude that there are 80 possible ways to book a flight from N.Y. to L.A. via chicago? Explain

42. ## Physics

For parts A-C: /^Vo | 2M | velocity into pg. ->R )2m ) ------ top view rear view A car of mass, 2m, is going around a turn at a constant radius, R, with velocity, v0. The turn is not banked – it is a flat surface. Assume the car and the road are on

43. ## Math

There are approximately 131,000 cases of colorectal cancer in the US each year ( data as of 1998). The US pop is approx 270 million. What's is the probability that a randomly selected person in the US will develop this type of cancer during a year? What

44. ## Statistics

2. In 2009 a random sample of 70 unemployed people in Alabama showed an average weekly benefit of $199.65. In Mississippi, for a random sample of 65 the number was$187.93. Assume population standard deviations of $32.48 and$26.15 respectively. a. Using

45. ## Statistics

3. The following table lists the frequency distribution for 60 rolls of a die. Outcome 1-spot 2-spot 3-spot 4-spot 5-spot 6-spot Frequency 7 12 8 15 11 7 Using the “Goodness of Fit” test at the 5% level of significance, test whether the null hypothesis

46. ## Math

The number of red cards in Lyle's trading card collection is directly is proportional to the number of yellow cards. At one point, Lyle's collection consisted of 56 red cards and 224 yellow cards. If r represent the number of red cards, and s represents

47. ## math

There are 3 reds, 4 blues, 6 whites and 5 yellows in a bag. What is the probability that the first two you draw are both red if you do not replace the first one?

48. ## Algebra

How do I write the terms of the series and find the sum. 4 summation notaion sign (k+6)^2 where k=1 under the summation sign

49. ## physics

A boat is traveling on a bearing of 25 degrees East of North at a speed of 4 knots (a knot is 1.852 km/h). After traveling for 3 hours, the boats heading is changed to due South and it travels for an additional 2 hours at 5 knots. Using a Vector diagram,

50. ## stoichiometry

1.how many mole, Fe can be made from Fe2O3 by the use of 20 moles of carbon monoxide, CO in the following reaction? Fe2O3+ 3CO = 2Fe+ 3CO2 2. How manhy moles of H2O are produced when 2.75 moles of O2 are consumed if burning methyl alcohol, CH3OH, according

51. ## maths

a big wheel of a penny farthing bicycle has a radius of 0.75m work out the number of complete turns the big wheel makes?

52. ## math

Which of the following conclusions is true about the statement below? x^2 = √x a) The statement is always true. b) The statement is true when x is negative. c) The statement is true when x=0. d) The statement is never true.

53. ## chemistry

If 22.0 of gas has a volume of 0.22 at 320 , what is its pressure in mmHg?

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -2x^2 + 9x + 9. a) {–0.22, 1.00} b) {-2, 9} c) {–4.50, –4.50} d) {–0.84, 5.34}

55. ## math

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -2x^2 + 5x + 7. a) {3.50, –1.00} b) {-2, 5} c) {–2.50, –3.50} d) {–0.29, 0.71}

56. ## algebra

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -9x2 + 2x + 6. a) {-0.71, 0.94} b) {-9,2} c) {-0.22, -0.67} d) {-1.50, 0.33}

57. ## math

Find the volume of this triangular prism. base 3, width 2, height 4 Type number answer only.

58. ## math help

Select the values of x that are solutions to the inequality 0 > x^2 + 5x -2

59. ## Chemistry

i. Which of the following solutions has the lowest pH (more acidic). Explain you answers. a. a 0.1 M solution of a strong acid or a 0.1 M solution of a weak acid. b. a 0.1 M solution of an acid with Ka=2×10-3 or one with Ka=8×10-6 c. a 0.1 M solutions of

92. ## math

I used 8 gallons of gas when I drove for 240 miles. How many gallons of gas are needed to drive 720 miles??

93. ## home economics

what are the cost and consequences of providing the subsidies and welfare

94. ## budgeting money

Budgeting should begin with

95. ## physical science

Plan,design and conduct investigation to find out whether the amount of gas produced will depend on the increase on the concentration of HCl when it reacts with an excess Zn

96. ## math

what is the formula to calculate the area of a trapziode.

97. ## pre calculus

1.) If h(x)= (fog)(x) and h(x) = 3 over the square root of x+3 , find g(x) if f(x)= 3 over the square root of x+2. my answer is x+1. Am I right? 2.)If f(x)=3x,g(x)=x-3,and h(x)= the square root of x, find (fogox)(X). I really didn't get this will someone

98. ## Physics

When catching a ball, your cricket coach advises you to move your hands backwards with the ball. Explain the physics behind this 'follow through' technique.

100. ## Life orantation

Discuss 5 ways in which the HIV/AIDS problem impacts on the community?

101. ## Math

A study determines that 60% of the voters in a town intend to vote for the incumbent mayor. If a sample of 8 people is selected, using the binomial formula, what is the approximate probability that 6 of the 8 people surveyed intend to vote for the

102. ## Life orientation

Hi cn u gve me 5 wayz in which hiv/aids impactz 0n the community

103. ## life orientation

in 10-15 lines critically discuss 5 ways in which the humen or environmental problem impacts on the community

104. ## math

a function f(x) is defined as f(x)= -8x^2. What is f(-3)?

105. ## ELA

Which of the following is a simple sentence? A.Dawn mounted the stage slowly B.As she stepped in front of the podium,her legs were trembling. C.She was a talented speaker,and she greatly admired Dr.King. D.When she looked up again,her brother grinned and

x/4=10/20

107. ## Math Systems

I cannot solve these last three systems. Could you show me the work for them so i understand how to do them. 1) x-y=1 2x+y=5 3x-4y=2 2) 5x+8y+6z=14 2x+5y+z=12 -3x+6y-12z=20 3) x^2+2xy-2y^2=-11 x^2+xy-2y^2=-9

108. ## math

three friends are sharing 36 cookies. jerry states that he wants 25% of the cookies, Gary wants 1/2 of the cookies and Terry wants 0.75 of the cookies. how many cookies does each person want? can each person get what they want? Explain your answer.

109. ## math

2.)If f(x)=3x,g(x)=x-3,and h(x)= the square root of x, find (fogox)(X). I really didn't get this will someone please show me how to do it? This I what I did to solve for it: 3(x-3) 3(he square root of 25-3 3(5-3) 15-9=6 Ok here is another way I solved for

110. ## math

2.)If f(x)=3x,g(x)=x-3,and h(x)= the square root of x, find (fogox)(X). I really didn't get this will someone please show me how to do it? This I what I did to solve for it: 3(x-3) 3(he square root of 25-3 3(5-3) 15-9=6 Ok here is another way I solved for

critical thinking involves:coming up with the best solution, a thought process that is rationallogical &systematic, coming up with the best solution

112. ## science

A solution of NaOH(molar mass 40g mol-1)is prepared by dissolving 1.6g of NaOH in 500 cm cube of water.Calculate molarity(M) of the solution

113. ## ela

what is the authors purpose for writing the test john white and roanoke?

114. ## Math

Given table, X ; (1+x)^(1/x) -0.5. ; 4 -0.1 ; 2.8680 -0.01 ; 2.7320 -0.001; 2.7196 0.001 ; 2.7169 0.01 ; 2.7048 0.1 ; 2.5937 0 5 ; 2.25 From the table, show that lim x->infinity (1+x)^(1/x)=e. Plz someone show me the step how to show it based on the table.

115. ## chemistry

A solution is made by dissolving 15.5 grams of glucose (C6H12O6) in 245 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m? Show all of the work needed to solve this problem.

116. ## solve the equation

Solve the equation log(x+49) - log x=1

There are 150 students in 7th grade. After signing up for electives for next year, the counselor posted the following data: Art - 65 students Band - 70 students Theatre - 50 students Not all students signed up for an elective. Display this data using Venn

118. ## math

Maurice needed to cut a piece of wood for this project that measures 4 and 3/4 inches. how much wood will he have left if the board that he is cutting from is 8 inches long? show your work.

119. ## Grammar

Can you please define "usable sentence?" Can you please give me an example of a usable sentence? Thanks for your help.

120. ## College math

I really need to know the answer to this extra credit problem. Please help! A quantity, W, is directly proportional to X and the square of Y and inversely proportional to the cube of Z. W=3 when X=4, Y=2 and Z=4. What is the value of W when X=8, Y=9 and

121. ## poetry...

"Hope is the thing with feathers That perches in the soul, And sings the tune--without the words, And never stops at all, "And sweetest in the gale is heard; And sore must be the storm That could abash the little bird That kept so many warm. "I've heard it

122. ## WRITING

I need help revising for pronouns towards this paragraph: Choosing a roommate is more difficult than they might think. People have different attitudes about sharing a living space. These attitudes are often based on our notions of cleanliness, ownership,

123. ## algebra

Tom decides to make a rectangular desk top from a plywood door that was stored in the basement. The door was 2 feet longer than twice its width. To get the desired size desk he cuts 3 inches off its length and 1/2 foot off its width. If the plywood he cut

124. ## biology - environmental

How does the edge (shoreline) of a marsh/wetland affect the wetland? Would it be better for the wetland to have a round or broken shoreline? Are coves, peninsulas and islands important to have? How does the shape affect wave action and exposure to wind?

125. ## math

25/11 + 2y = 3 Subtract 25/11 from both sides How do subtract this fraction from 3?

126. ## Grammar

I'm doing a homework assignment - determining whether sentences are run-on, complete or usable. I'm stuck on this one. The patient obtained records in order to save the nurse a phone call to her previous doctor and she made sure to ask right away for this

127. ## math

38 divided bye 6

128. ## chemistry

How many moles are contained in 3.25 L sample of an ideal gas at 25 Celsius and 204 kPa?

129. ## log

Use the properties of log to find the exact value of each expression. Do not use calculator 8 log 8^5

130. ## eng1511

an essay:the sure solution to unemployment is a better quality of education

131. ## maths

Iam stuck with this question.Please anyone help me. An airplane is flying at an altitude of 10,000m.The pilot sees two ships A and B.Ship A is due south of P and 22.5km away(in a direct line).Likewise ship B is due East and 40.8km from P. The height is

132. ## Math 112 Please my last chance

Can you use the numbers 1 - 9, along with any math symbols and operations, to arrive at the answer of 100 when the 6 and 9 have a negative sign in front of them? I'm not sure how my teacher wants this to be done

133. ## math

Calculate the future value of S of an annuity using the following formula: S =R(1+i)^n-1/i) given R=250,i=0.001;n=13 please show the workout thankyou

134. ## Accounting

The Converting Department of Soft N' Dry Towel and Tissue Company had 920 units in work in process at the beginning of the period which were 75% complete During the period 16200 unis were completed and transferred to the Packing Department. There were 960

135. ## math

can you show the work for 6x^2+11x-35=0

136. ## Chemistry

A sample of aluminum oxide, Al2O3(s), contains 8.29*10^25 total atoms. Calculate the amount in moles of aluminum oxide in the sample. Hint: This is a two-step problem. Calculate the number of formula units first.

137. ## Alg 1

Solving quadratic equations: What is the radius of the largest circular quilt that can be made with an area less than or equal to 70 ft^2? Round your answer to the nearest tenth of a foot if necessary. Please solve and explain. Thanks

138. ## Poetry

Please check this. "Hope is the thing with feathers That perches in the soul, And sings the tune--without the words, And never stops at all, "And sweetest in the gale is heard; And sore must be the storm That could abash the little bird That kept so many

139. ## Alg 1

Solving quadratic equations: What is the value of "b" in the triangle where one part of the right angle is "3b" and the other part of the right angle is "b". The area inside is 24 in^2. Please solve and explain. Thanks

140. ## geometry

camera is 4 ft 6 inched off the ground 18 feet away from a silo, how tall is the silo

141. ## math

Write the slope Intercept form of the depletion of the line that contains -4,6 and 6,-1

142. ## Math

if alpha and beta are the zeroes of the polynomial f(x)=x^2-3x-2 , find a quadratic polynomial whose zeroes are 1/2(alpha)+beta and 1/2(beta)+alpha ? Please... i have no idea !!

143. ## science

u have 2 cars moving at the same mass and speed collide and stick together what is the momentum? a. twice the original b. half the original c. the same as the original d. 10 times the original

144. ## math

Michael invested \$1600 per half-year in an IRA each half-year for 9 years earning 9% compounded semi-annually. At the end of 9 years he ceased the IRA payments, but continued to invest his accumulated amount at 10% compounded yearly for the next 8 years.

145. ## English III Love of Life By: Jack London

Love of Life by: Jack London What is the cite of naturalism in the essay?? Please help me with this!! :( :) Thank you!!

146. ## statistics

A salesman who is on the road visiting clients thinks that on average he drives the same distance each day of the week. He keeps track of his mileage for several weeks and discovers that he averages 122 miles on Mondays, 203 miles on Tuesdays, 176 miles on

147. ## Help with statistics

In a study of store checkout scanning systems, samples of purchases were used to compare the scanned prices to the posted prices. The accompanying table summarizes results for a sample of 819 items. When stores use scanners to check out items, are the

148. ## ACC 400

Case 13-4 Application of SFAC No. 13 On January 1, 2006, Lani Company entered into a non cancelable lease for a machine to be used in its manufacturing operations. The lease transfers ownership of the machine to Lani by the end of the lease term. The term

149. ## Math

A plane leaves point A and flies S80° E to point B400 km away. How far east of A is B (to the nearest kilometer)?

150. ## Annuity math

Calculate the future value of S of an annuity using the following formula: S =R(1+i)^n-1/i) given R=250,i=0.001;n=13 please show the workout thankyou