# Questions Asked onJune 30, 2012

1. ## Essay

Essay: How I surprised my friend on her birthday part. A birthday party is the one day a year, which is very special and unique to everyone in their life. It is a day that should be celebrated with lots of joys and some surprises. Basically, I thought I

2. ## physics

1. A whistle you use to call your hunting dog has a frequency of 21 kHz, but your dog is ignoring it. You suspect the whistle may not be working, but you can't hear sounds above 20 kHz. To test it, you ask a friend to blow the whistle and hop on their

3. ## chemistry

the ph of a 1.00*10^-2 M solution of cyanic acid (HOCN) is 2.77 at 25 C. Calculate Ka and pKa for HOCN from this result.

4. ## Physical Geography PLEASE CHECK & HELP WITH #2!

The following questions are based on the “Mt. Dome, California,” quadrangle (Figure 33-2 found on page 228 of the Laboratory Manual; enlarged to scale 1:48,000; contour interval 40 feet) and the stereogram of the same region (Figure 33-3 found on page

5. ## math

solve the following: ax + by = a-b bx - ay = a+b find the value of x and y

6. ## pre cal

verify each identity tan(x/2)=tanx/secx+1

7. ## chem

a steel cylinder holds 1.50 g of ethanol what is the pressure of an ethanol vapor if the cylinder has a volume of 251 cm3 and the teperature is 250 degrees celcius?

8. ## Chemistry

A 0.22-caliber handgun fires a 27-{\rm g} bullet at a velocity of 765 {\rm m}/{\rm s}. Part A Calculate the de Broglie wavelength of the bullet.

9. ## physics

a rubber ball of mass 50g falls from a height of 10 cm and rebounds to a height of 50 cm .determine the change in the linear momentum and average force between the ball and the ground taking time of contact as 0.1 sec

10. ## chemistry

the dencity of 3 molal solution of NaOH is 1.110g/mL calculate the molarity of the solution

11. ## math

A stationery retailer generally prices portable computers using a 30 percent markup. The retailer expects to sell 100 portable computers at the 30 percent markup. How many units would it have to sell at a 10 percent increase in price from the original

12. ## Chemistry

Calculate the volume at s.t.p. occupied by a gas 'Q' originally occupying 153.7cc at 287K and 750mm pressure [vapor pressure of at 287K is 12mm of Hg]

13. ## maths

if one zero of the quadratic polynomial 4xsquare + 5x+ gama be reciprocal of another zero, find the value of gama.

14. ## pre calculus

Name 3 different representations of the following (-6, 3pi/4)

15. ## chemistry

Naturally occurring cobalt consists of only one isotope Co59 whose relative atomic mass is 58.9332. A synthetic radioactive isotope of cobalt Co60, relative atomic mass 59.9338, is used in radiation therapy for cancer. A 1.8516 sample of cobalt has an

16. ## dynamic

A particle moves along a straight line with an acceleration of m/s2, where s is in meters. Determine the particle’s velocity when s = 2m, if it start from rest when s = 1m.

17. ## Probability

You have a sample space of 2 events called A and B. From your experimental observations you determine the probability of A or B {i.e. P(A or B)} to be 71%. You also conclusively determine that the probability of A is 30% and the joint probability of both

18. ## english

emicolons, Colons, Dashes and Parentheses: Recall Exercise 2. Identify the correct sentence. a) Here's what I'd suggest—major in business; and minor in Spanish . b) Here's what I'd suggest; (major in business and minor in Spanish). c) Here's what I'd

19. ## Chemistry

Calculate the volume at s.t.p. occupied by a dry gas 'Q' originally occupying 153.7cc at 287K and 750mm pressure [vapor pressure of gas 'Q'at 287K is 12mm of Hg]

20. ## economics

I do my classes online and my book is online and it doesn't talk about this at all and i have done called and told my school but they will not fix it please help. Jean-Baptiste Say argued that entrepreneurs should be called the fourth factor of production

21. ## RES/351

what is the difference between a research question and a hypothesis? I alos need one or more research question and then develop twop appropriate hypotheses?

22. ## algebra

Jennifer is on her daily run. After 25 minutes she has gone 1.5 miles. If she continues at the same pace, how long in minutes will her 8.4 mile run take?

23. ## physical science

does a sunken ship sitting on the ocean floor have a buoyant force on it.

24. ## bio

Regulation of an enzyme's activity occurs

25. ## curriculum for early childhood education

the mirror image activity described in your textbook is an example of a/an

26. ## chemistry

How can you precipitate BaCrO4(s) from a solution of barium nitrate and potassium dichromate?

27. ## introduction to university studies

how might you use mnemonics in college students and adult learners?

28. ## pre cal

Verify each identity sin^x+siny/sinx-siny=tan(x+y/2) (times) cot(x-y/2)

29. ## pre cal

verify identity (sinx-cosx)^2=1-sin(2x)

30. ## math

if f'(x)=cos^2x and f(1)=0 then f(x)=

identify and explain the objectives of a supplier

32. ## Algebras

themeanscore on a set of 24 tests in 71. what is thesumof all the test scores?

33. ## Bookkeepinng

I am given a critical thinking question and asked to do a balance sheet for a given month, but the owner put a question mark beside Truck and Accounts Payable in the assests column. How do I handle this part when I am given no other facts about these two

34. ## algebra1

factor: 64a^2-48a+9

35. ## physical science

what generally happens to atmospheric pressure on a windy day

36. ## math

In my math book i got a question that said 1/7 times 1/7. I got answer of 2 if my answer is not right can you show me how to do the problem.If my answer is correct still show me how to do the problem

37. ## maths

how to measure time with a tin can containing water

38. ## SOC120

what does moral and minima mean by Lenn Goodman

39. ## Physics

A comet orbits the Sun with a period of 72.0 yr. (a) Find the semimajor axis of the orbit of the comet in astronomical units (1 AU is equal to the semimajor axis of the Earth's orbit). (b) If the comet is 0.60 AU from the Sun at perihelion, what is its

40. ## Maths

I can't understand this math problem.... Please help me.... ------------------ Problem: In a boys' school, 5/8 of the boys play football and 4/7 play rugby. If every boy plays at least one of the two games, find the fraction of the boys who play both

41. ## english

Hi, I Proofread for wording errors and grammar, but I need help to see if my grammar is proper now. I personally respect every religion, and I love reading holy books. Holy books inspire many people. Holy books taught me many morals and stories on our

42. ## Calculus

Find an equation of the line that is tangent to the graph of f and parallel to the given line. Funtion: f(x)=1/sqrt(x-1) Line: x+2y+7=0

43. ## math

How can i measure or get the correct size of a bicycle rim.

44. ## Math

Im working on a math question and the answer is 2hr and 24min. I am getting 2.4 with my calculations how do i take 2.4 and get 2hr and 24min.???

45. ## english 121

I need help with my quiz in week 2

46. ## physics

A truck in driving up the interstate with a constant velocity. Is work being done by a net external force acting on the truck? Justify answer. Why doesn't the work done by the engine pushing it forward make its kenetic energy increase?

47. ## algebra

solve: (x+2)(x-11)(x+1)>0

48. ## algebra

solve: 3/v = 6/v - 1/5

49. ## Sci 230

I need serious help with week 7

50. ## maths

show tha minute hand of a clock gains 5 degree 30 minutes over the hour hand in one minute?

51. ## math

How do you find the reciprocal of 5/3