lesley
Most popular questions and responses by lesley
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
asked on May 14, 2011 
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
asked on April 10, 2013 
mathgeometry
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
asked on May 20, 2015 
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
asked on April 10, 2013 
Physics
A rock is dropped from a height of 2.7 m. How fast is it going when it hits the ground?
asked on February 27, 2011 
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
asked on February 19, 2007 
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.
asked on February 27, 2011 
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
asked on September 25, 2017 
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
asked on June 10, 2016 
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?
asked on February 27, 2011 
Physics
How much work is needed to lift a 3 kg mass a distance of 0.75 m?
asked on February 27, 2011 
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
asked on February 12, 2007 
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
asked on April 26, 2007 
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?
asked on August 30, 2011 
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.
asked on November 17, 2006 
Physics
How much work is done in accelerating a 2000 kg car from rest to a speed of 30 m/s?
asked on February 27, 2011 
Algebra two
An empty 5gal 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
asked on September 8, 2014 
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.
asked on October 10, 2011 
math
Find b such that (8x+1/b)2=x has a solution set given by {3}. b =
asked on October 4, 2011 
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%
asked on March 2, 2011 
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.
asked on September 1, 2011 
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?
asked on February 27, 2011 
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.
asked on February 27, 2011 
maths
What is 174.36 rounded up to nearest tenth
asked on September 18, 2010 
Math
Eight oranges cost gh¢15.00. how much will twenty oranges cost?
asked on May 10, 2018 
geometry  PLEASE ANSWER ASAP! thanks!
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
asked on May 20, 2015 
maths please help and explain
A. 16p^24q^2/(6p^27pq+2q^2) *6p^213pq+6q^2/(4p^24pq3q^2) B. a^2+a2/(6a12) / a+2/(a^23a+2) C.3/(x3) x^2/(6+xx^2) 2/(x+2) D.x+1/(x^31)  1/(x^2+x+1) Key * multiplication !
asked on February 8, 2015 
Finite
write an equation of a line containing the given point and perpendicular to the given line(4,7);4x+y=8
asked on September 9, 2011 
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
asked on March 25, 2009 
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
asked on January 4, 2017 
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.
asked on October 10, 2011 
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.
asked on September 1, 2011 
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:
asked on January 6, 2010 
Quiz
My first is in silver but not in gold a Stirling job so I’m told
asked on September 5, 2018 
Math
A number x is atleast 15
asked on January 11, 2018 
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.
asked on October 11, 2016 
american history
In the southern campaign launched by British, Cornwallis lost a battle with the Americans under Nathaniel Greene at?
asked on April 7, 2014 
english
what does "His face masked his troubles. It was a face without effect, without emotion." mean?
asked on September 19, 2013 
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?
asked on October 15, 2012 
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?
asked on February 27, 2011 
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.
asked on November 28, 2006 
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
asked on October 21, 2006 
organic chemistry
Is 4 ethyl2,4 octadiene a correct name? How can i identify if it's incorrect or correct?
asked on July 11, 2015 
maths please help
Subtracting ,division and multiplication of fractions A. 16p^24q^2/(6p^27pq+2q^2) *6p^213pq+6q^2/(4p^24pq3q^2) B. a^2+a2/(6a12) / a+2/(a^23a+2) C.3/(x3) x^2/(6+xx^2) 2/(x+2) D.x+1/(x^31)  1/(x^2+x+1) Key
asked on February 7, 2015 
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
asked on April 11, 2013 
physics ASAP please
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
asked on September 26, 2011 
Chemistry
Convert 186,281 miles per second to feet per year.???
asked on August 30, 2011 
Math
48, 12, 3 ... Find the next three terms of the sequence.
asked on May 19, 2011 
6th grade science
What is the term for radiation beneath the frequency we can see?
asked on April 14, 2010 
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!
asked on February 6, 2009 
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
asked on January 16, 2007

accounting
$3,200,000
posted on October 17, 2017 
Math Check Answers
Number 1 is 2
posted on December 18, 2016 
science
I agree
posted on December 17, 2016 
life orientation
fundamental
posted on May 10, 2016 
Social Studies
1 is c
posted on October 23, 2015 
Ife orientation
the hazards that cause ill heath,crises and disasters
posted on April 25, 2013 
Math
find the sum or difference in simplest form 2/3+2/9=
posted on November 15, 2011 
Math
find the sum or difference in simplest form
posted on November 15, 2011 
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 
word unscramble
pandingingfrenrit
posted on November 17, 2008 
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