# Questions Asked onDecember 27, 2015

1. ## Chemistry

the pH of a solution is 10 and other is 12 when equal volumes of these low are mixed the pH of the resulting solution is?

2. ## cambrain hall

What is perodic table, who gave modern perodic table with any5 important points about the perodic table ?

3. ## math

the second derivative of f(x)=ln(x^2+1)

4. ## math

find the equation of tangent line to the graph of f(x)=xcosx(√2 x) at a=0

5. ## chemistry

If the titration of a 30.0 mL sample of sulfuric acid requires 27.65 mL of 0.090 M sodium hydroxide, what is the molarity of the acid? H2SO4(aq)+2NaOH(aq)→Na2SO4(aq)+2H2O(l)

6. ## Math

Find the derivative of y=(sinx/(1+cosx))^2. I used the chain rule, but the second part involved the quotient rule which gives a very complicated expression that u do not know how to simplify. Could you please give me a detailed step by step solution for

7. ## science

A uniform solid sphere is placed on a smooth horizontal surface and a horizontal force F is applied on it at a distance h above the surface. The acceleration of the center?

8. ## math

find the equation of tangent line to the graph of f(x)=xcos(√2 x) at a=0

9. ## math

A museum groundskeeper is creating a semicircular statuary garden with a diameter of 30 feet. There will be a fence around the garden. The fencing costs \$9.25 per linear foot. About how much will the fencing cost altogether? THANK YOU!

10. ## Math

Derivative of y=sec(tanx)? I don't get how it is secxsecx*secxtanx*tanxtanx. Where does an extra tanx come from? Derivative of sec(tanx) is just secxtanx*tanx (and then multiply the inside as well so)* sec^2(X) as derivative of tanx. I have 2 tanx, where

11. ## mustapha

0.0025*10^1/3

12. ## math

if h(x)=sinπ/x then find hderivative(4)

13. ## Physics

A particle of mass m1 experiences a perfectly elastic collision with a particle of mass m2 at rest. What fraction of the incident energy does the incident particle lose if a) it recoils at right angle to the original direction and b) the collision is

14. ## Physics help

Find the differential equation of motion for a gravitational pendulum of mass m and length a by using the fact that the torque of its weight relative to the point of suspension is equal to the time derivative its angular momentum. Solve this equation to

15. ## math

what is the 3rd derivative of f(x)=x^2 e^x^2

16. ## Physics college

A particle is thrown from the origin of the frame xOy at the moment t = 0, with speed v0 at a certain angle b from the Ox axis. At the same moment another particle begins to fall freely from a wall with height h, situated at the distance d. Air resistance

17. ## komenco

the first, second, and fifth term of an AP are three consecutive terms of an exponential sequence. if the first term of the linear sequence is 7 ,find it common difference

18. ## Mechanics

A constant force of 40newton is applied tangentally to the rim of the wheel with 20cetimetre radius the wheel hs moment of intial 30kg find (a)angular acceleration (b)angular speed after 4second frm rest (c)d number of revolution made in(d)show that d work

19. ## Algebra

a factory can produce two products, x and y with a profit approximated by P=14x+22y-900. the production of y can exceed x by no more than 100 units moreover production levels are limited by the formula x+2y,+1,400. what production levels yield maximum

20. ## Health

Which one of the following choices is the best option for a vegan snack? A. Tomato juice and macaroni and cheese B. Almond milk with butter cookies C. Vanilla soymilk, peanut butter, and pretzels D. Chocolate soymilk with angel food cake I would say B ,

21. ## Health (Double checking)

Which one of the following choices is the best way to build muscle bulk? A. Eat a healthy, balanced diet and follow a regular fitness program. B. Use amino acid powders from a health food store. C. Eat more high-protein foods. D. Avoid vegetarian diets. A?

22. ## science

an organisms particular role in its habitat or when and how it survives is called what?

23. ## math

How many 2/9 inch pieces can be cut from a piece of yarn that is 6 inches long

24. ## Math

How many triangles exist when the measure of angle B is 100 degrees, a =10 and b=5? a. none b. 1 triangle c. 2 triangles I have already solved this and I have found that there will be no triangle because by using the law of sines I found that the value is

25. ## math

Sam in placing rope lights around the edge of a circular patio with a diameter of 18 feet. The lights come in lengths of 54 inches. How many strands of lights does he need to surround the patio edge?

26. ## English

1. to avoid doing or having something 2. avoid doing or having something =================== It is the definition of 'skip.' Why is 'to' put before 'avoid'? Can't we use #2 as the definition of 'skip'?

27. ## English

as reported by somebody or something ====================== This is the definition of 'according to.' What is omitted between 'as' and 'reported'? What is the part of speech of 'as'?

28. ## English

Hello. I would be very grateful for some help. 1) Do you think the preposition "in" is OK in the following sentence or is it "after": "He knew he would return in a year"? 2) If a person left a building or a room, is it possible to say: "he came out of the

29. ## gale math

How to write 233.75 and 85.50 as a decimal number

30. ## accounting and finance

find the rate of interest compound semi-annually at which birr 2000 will grow to birr 5000 in 9 years?

31. ## math

1.On the package of candy coated chocolates it states the box contains 147 grams. In reality, the mass can vary between 145 g and 150 g. You may find between 63 and 69 pieces of candy in any given box. Explain which variable represents the domain and

32. ## math

Use words to describe a reasonable domain and range for the number of people painting a house and the time required to finish the job. Explain your answer.

33. ## mats

AD is the mid point of triangle ABC and G divides AD in the ratio 2:1 .Prove that triangle AGB =area BGC = area AGC =1Ã·3 area ABC

34. ## Maths

area (triangle BCE )=75.2 meter square. Find area ( ABCD) where ABCD is a parallelogram

35. ## Maths

In a triangle ABC, D is the midpoint of BC and E is the midpoint of AD. if area of triangle ABC is 144 meter square then find the area of triangle DCE

36. ## maths

L parallel to M ,ABCD parallelogram. IF area of (triangle BDC)=121.5 centimeter square ,write the value of h

37. ## mats

in a triangle ABC, D is the midpoint of BC and E is the midpoint of AD. IF area of triangle ABC is 144 centimetre square then find the area of triangle DCE

38. ## Algebra

Over 350 students took a college calculus final exam. the scores of the students follow a normal distribution. using the information given below, determine the mean and the standard deviation for the students'scores. Give your answers to the nearest tenth

39. ## Maths

PQRS is parallelogram and K is the midpoint of the side PQ Prove that area of (triangle PKS )= 1÷2 area of (triangle SKR )

40. ## maths

ABCD is a parallelogram and E is the midpoint of the side CD . Prove that area (ABED )=3×area of (triangle BEC )

41. ## stats

On the seventh day of Statistics, my teacher gave to me --- seven swans a-swimming. But can they swim faster than American Olympic gold medallist Michael Phelps? Michael can swim the 200 meter butterfly in 1 minute 54 seconds (which is 114 seconds). In the

42. ## University of Liberia

find the linear speed of each point 2cm and 15cm from the axis of a phonograph record rotating at 33 and 1/3 rev/min

43. ## algebra

Suppose that a plumbing repair bill, not including tax, was \$120. This included \$25 for parts and an amount for 2 hours of labor. Find the hourly rate that was charged for labor.

44. ## Health

Using carbo-loading to increase the store of glycogen seems to benefit only those athletes who engage in aerobic activities that are A. more than 90 minutes. B. between 30 and 60 minutes. C. less than 20 minutes. D. between 50 and 80 minutes. A? I'm double

45. ## Calculus

Find the integral of 2/((2-x)(x+2)^2)dx.

46. ## Math

Marko runs 3/5 mile 3 times a week. How far does Marko run each week?

47. ## physics

find the linear speed of each point 2cm and 15cm from the axis of phonograph record rotating at 33 an 1/3 rev/min