fatma

Most popular questions and responses by fatma
1. organic chemistry

2. An unknown white solid has melting point range 119 – 121o C. Benzoic acid is a white solid of 122 o C melting point. How can a student confirm the identity of the unknown solid (is the benzoic acid or not)

2. chemistry

explain changes that occur when the following substances are separated heated in oven crucible 1)copper metal. 2)copper nitrate

3. calculus

Let f x   coth x . Use the Graph software posted in Moodle to do the following: (a) Graph f x  . (b) Graph the tangent and normal lines to the graph of f x  at x 1. (c) Graph f x  . (d) From the graphs obtained in parts (a)

4. physics

1\ Acar is moving with acceleration 200 m in 50 sec reached to velocity 10 m\sec .what the total distance the car moved in 60 sec

5. math

Write out the first five term of the sequence determi whether the sequence converges and if so find its limit ( n^2)/(4n+1) n= 1 to n = ∞

6. math

Write out the first five term of the sequence determi whether the sequence converges and if so find its limit (n/(n+3) n=1 to n = ∞

7. math

A product of a two digit number is24 when the number is reverse exceed the original number by 27 find the number

8. math

Find the area between x=-y and x=2-y^2

9. math

Find the exact arc length x=1/3(y^2 +2)^3/2 from y= 0 to y = 1

10. Physica

If a student desires to produce three times larger and an erect image from a double convex lens with focal length of 15 cm ,then he should place the object from the lens at ;

11. math

Divide the following by both long division and synthetic division a). x^3 + x^2 - 2x + 4 by x-2 b). x^5 + 4x^4 + x^3 - x^2 + 2x - 7

12. math

Sum[(-1)^(n - 1) (7/9^(n - 1)), {n, 1, Infinity}]

13. math

∑ (-1)^((n-1)) . 7/9^(n-1) n=1 to ∞

14. math

∑ (-3/4)^(n-1) n=1 to n=∞

15. math

Write out the first five term of the sequence determi whether the sequence converges and if so find its limit (n/(n+3) n=1 to n = ∞

16. english

Change the sentences,replacing the phrase people who are..with an adjective used as an noun. 1-People who are uneducated have a hard time catching up.

maybe there was a river

posted on March 8, 2018

Zxcvfgnhjmk,l;

posted on March 8, 2018
3. organic chemistry

I think it is a benzoic acid but it is impure

posted on March 16, 2017
4. math ALGEBRA

T=5 u=6 5 + 6=11 65_56=9 Answer =56

posted on August 28, 2016
5. Algebra

c^2 = a^2 + b^2 = 12^2 + 5^2 = 144 + 25 = 169 , then square root this number to give =13 ft. the length of the ladder :)

posted on April 4, 2016
6. Physics

Amotorcycle slowed down to rest from avelocity of 10m\sec whiletraveling 30m what is its average acceleration

posted on July 7, 2012
7. acids and alkalis

please tell me how many alkalias are there please i need it fo tomorrow or else i will get detention plzplz i love you and marry you if u tell me da answer plz i beg u reply back plz

posted on October 7, 2008