# Lesley

Popular questions and responses by Lesley
1. ## Chemistry

A 108g piece of unknown metal is heated to 100 degrees C in boiling water. The heated sample of metal is then dropped into 50ml of H20, which is initially at 23.0 degrees C. After a few minutes the temp. of water raises to 37.5 degrees C. What is the

2. ## Math

The average monthly mortgage payment including principal and interest is \$982 in the United States. If the standard deviation is approximately \$180 and the mortgage payments are approximately normally distributed, find the probability that a randomly

3. ## Physics

A rock is dropped from a height of 2.7 m. How fast is it going when it hits the ground?

4. ## math

A study conducted by a TV station showed the number of televisions per household and the corresponding probabilities for ecach. Find the mean, variance, and standard deviation. (in table) Number of televisions 1 2 3 4 Probability P(X) 0.32 0.51 0.12 0.05

5. ## Physics

An arrow is fired vertically upwards by a bow and reaches an altitude of 134 m. Find the initial speed of the arrow on the ground level.

6. ## Physics

How much work is needed to lift a 3 kg mass a distance of 0.75 m?

7. ## Chemistry

Writing the net ionic equation for sodium fluoride+hydrochloride, magnesium iodide + lead (II) acetate sliver (I) acetate + potassium iodide nickel (II) sulfate + barium chloride barium acetate + ammonium sulfate barium hydroxide +aluminum bromide zinc

8. ## math-geometry

the sunshine orange juice company wants its product in a one quart container(1 quart=107.75 cubic inches). the manufacturer for their containers makes cylindrical cans that have a base that is 5 inches in diameter. what will be the height of the one quart

9. ## English: clauses

we have to to identify the dependent clause in this sentance and then tell wether the clause is an adverb, adjective, or noun clause. "Who knows what the future will bring?" In this sentance i know where the dependent clause starts but other than that i'm

10. ## Music/choir

What do the following notes look like? quarter note ,half note,eighth note ,whole note also how many beats do they receive? http://www.musictheory.halifax.ns.ca/5durations2.html If a whole note receives 4 beats to a measure.... then you can easily figure

11. ## Physics

How much work is done in accelerating a 2000 kg car from rest to a speed of 30 m/s?

12. ## Science

Which layers of the Earth can only be studied by indirect means? ( Layers being inner core, outer core, mantle, And Crust) inner core, outer core, mantle Yes, if you personally visited any but the crust you would be destroyed by the heat and pressure.

13. ## Pre calc

A cylinder shaped can needs to be constructed to hold 1000 cubic centimeters of soup. The material for the sides of the can costs 0.1 cents per square centimeter. The material for the top is.2 and the bottom is .3 cents per square centimeter. Find the

14. ## Physics

A student uses a spring to launch a marble vertically in the air. The mass of the marble is 0.002 kg and when the spring is stretched 0.05 m it exerts a force of 10 N. What is the maximum height the marble can reach?

15. ## Physics

A student uses a spring with a spring constant of 130 N/m in his projectile apparatus. When 56 J of potential energy is required to launch the projectile to a certain height, what is the compression in the spring?

16. ## science: cells

1~ What do red blood cells do and is there anything significantly different about them from other types of cells? 2~ What are bone cells and is there anything significantly different about them from other types of cells? (I just need help for studying i

17. ## Algebra two

An empty 5-gal water jug weighs 0.75lb. With 3c of water inside, the jug weighs 2.25lb. Predict the weight of the jug with 5c of water inside

18. ## math

What is the conversion factor sequence for units from ft./sec. to km./hr.? Is (ft/sec) x (sec/min) x (min/hr) x (m/ft) x (km/m) correct?

19. ## English

Last night, I slept like a log. Should "I slept like a log" be A. I slept like a baby. B. I slept well. C. I slept as if there were no tomorrow.

20. ## trigonometry

the length of a rectangle is 2cm longer than the width. if its length and width are both increased by 4cm, its area is increased by 72 cm^2. find the dimensions of the original rectangle.

the sunshine orange juice company wants its product in a one quart container(1 quart=107.75 cubic inches). the manufacturer for their containers makes cylindrical cans that have a base that is 5 inches in diameter. what will be the height of the one quart

22. ## Physics

A children’s roller coaster is released from the top of a track. If its maximum speed at ground level is 8 m/s, find the height it was released from.

23. ## Math

Identify the group that does Not contain equivalent fractions, decimal and percent. a.1/20, 0.05,5% b.7/20,0.7,70% c.1/8, 0.125, 12.5%

24. ## English

Pronoun agreement: How do you know when to use who or whom? Who is a subject of a verb. Examples: Who let the dog out? Pat is the person who is always late. Whom is used as the object of a verb or a preposition. Examples: He asked, "For whom does the bell

A. 16p^2-4q^2/(6p^2-7pq+2q^2) *6p^2-13pq+6q^2/(4p^2-4pq-3q^2) B. a^2+a-2/(6a-12) / a+2/(a^2-3a+2) C.3/(x-3) -x^2/(6+x-x^2) -2/(x+2) D.x+1/(x^3-1) - 1/(x^2+x+1) Key * multiplication !

26. ## math

Find b such that (8x+1/b)-2=x has a solution set given by {3}. b =

27. ## maths

What is 174.36 rounded up to nearest tenth

28. ## Math

Eight oranges cost gh¢15.00. how much will twenty oranges cost?

29. ## precalc

Success in business depends on many factors. Buying habits of consumers, trends in fashion and taste, seasonal trends, the strength of the competition, and the condition of the national and international economies all affect the fortunes of a business. The

30. ## college chemistry

Predict two new ionic compounds that may form after you mix these sodium phosphate and calcium nitrate solutions. Write a balanced equation to show which ions would collide and what compound will form.

31. ## english

what does "His face masked his troubles. It was a face without effect, without emotion." mean?

32. ## information technology (elphi)

I need help with my PAT phase en I need to know what must go into the pat file and the whole layout of it

33. ## biology

Which one of these occurs durning the light reactions of photosynthesis? a. carbon dioxide fixation b. g3P production c. NADPH production d. reduction in carbon dioxide

34. ## English

Is there anyhong wrong with these two sentences? 1. Her sister and her are now employed at Beef Barn as cooks. 2. The mechanic told Bill and I that the car was not finished.

35. ## Physics

How much work must be done to accelerate an 8x105 kg train: a) from 10 m/s to 15 m/s; b) from 15 m/s to 20 m/s; c) to a stop an initial speed of 20 m/s?

36. ## trigonometry

the length of a rectangle is 2cm longer than the width. if its length and width are both increased by 4cm, its area is increased by 72 cm^2. find the dimensions of the original rectangle.

What is the term for radiation beneath the frequency we can see?

38. ## Spanish

I'm curious to know if i translated these two sentences right: 1.The stop sign is located at the intersection. ~I translated: La senal de parada esta queda al cruce de calles. 2.It is very dangerous to drive a truck across the narrow bridge. ~I translated:

In a rugby match 3 players huddle around a fourth player and push him. If they push with the following forces, what is the resultant force on him? 160 N 125, 140 N 35, and 220 N 200

40. ## Finite

write an equation of a line containing the given point and perpendicular to the given line(4,7);4x+y=8

41. ## Math

A number x is atleast 15

42. ## american history

In the southern campaign launched by British, Cornwallis lost a battle with the Americans under Nathaniel Greene at?

43. ## math

Chester builds and collects models of boats and planes. He has 22 models all together chester has 8 more planes than he has boats. How many of each kind of model does he have?

44. ## Sleep/Dreams

How does our mind make dreams when we sleep? There are several theories about what causes dreaming. One is discussed in this article: http://www.members.cox.net/dagershaw/lol/DreamsReveal.html I hope this helps. Thanks for asking.

45. ## Quiz

My first is in silver but not in gold a Stirling job so I’m told

Subtracting ,division and multiplication of fractions A. 16p^2-4q^2/(6p^2-7pq+2q^2) *6p^2-13pq+6q^2/(4p^2-4pq-3q^2) B. a^2+a-2/(6a-12) / a+2/(a^2-3a+2) C.3/(x-3) -x^2/(6+x-x^2) -2/(x+2) D.x+1/(x^3-1) - 1/(x^2+x+1) Key

47. ## Chemistry

Convert 186,281 miles per second to feet per year.???

48. ## math

How to you do the prime factorisation of 350 using exponets? Just break it down into smaller and smaller factors until are are prime. 350 = 50 * 7 = 10 * 5 * 7 = 5*2*5*7 = (5^2)*2*7 1000

49. ## organic chemistry

Is 4 ethyl-2,4 octadiene a correct name? How can i identify if it's incorrect or correct?

50. ## Math

-48, -12, -3 ... Find the next three terms of the sequence.

51. ## School Projects

My son in grade 4 got zero for his project, "autobiography" What exactly are teachers wanting and is there a site that I can go to to show him some examples? Hes really upset and I don't know what the teachers wants!

1. ## accounting

\$3,200,000

posted on October 17, 2017

Number 1 is 2

posted on December 18, 2016
3. ## science

I agree

posted on December 17, 2016
4. ## life orientation

fundamental

posted on May 10, 2016
5. ## Social Studies

1 is c

posted on October 23, 2015
6. ## Ife orientation

the hazards that cause ill heath,crises and disasters

posted on April 25, 2013
7. ## Math

find the sum or difference in simplest form 2/3+2/9=

posted on November 15, 2011
8. ## Math

find the sum or difference in simplest form

posted on November 15, 2011
9. ## math

i'm not sure, but i think all of them do except for the scalene triangle and maybe the rectangle.

posted on January 6, 2010
10. ## word unscramble

pandingingfrenrit

posted on November 17, 2008
11. ## Biology

wow. dis reli helped alot for my biology hw. i had those same ansers but i needed to make sure. TY so much. this was of great help otherwise i wouldve probally skipped da question.

posted on October 26, 2008