Sunday
April 26, 2015

Posts by Andrea


Total # Posts: 715

Physics
With an average acceleration of negative 1.2m/s squared, how long will it take a cyclist to bring a bicylcle with an initial speed of 6.5 m/s to a complete stop? answers are: either 2.0, 5.4. 0.18 or -1.8s Please help-I am totally confused
September 1, 2010

algebra
in 1990, the life expectancy of males in a certain country was 68.1 years. in 1995, it was 70.9 years. let E represent the life expectancy in year t and let t represent the number of years since 1990 F(x)=
August 1, 2010

physics
A racing dog is initially running at 15.0 m/s, but is slowing down.How fast is the dog moving when its kinetic energy has been reduced by half? By what fraction has its kinetic energy been reduced when its speed has been reduced by half?
July 18, 2010

finance
You have found three investment choices for a one year deposit: 10% APR compounded monthly, 10% APR compounded annually, and 9% APR compounded daily. Compute the EAR for each investment choice. Assume that there are 365 days in the year.
July 12, 2010

Physic
How many kilometers would you have to go above the surface of the earth for your weight to decrease to half of what it was at the surface?
July 10, 2010

Physic
A bowling ball weighing 71.2 N is attached to the ceiling by a 3.60 m rope. The ball is pulled to one side and released; it then swings back and forth like a pendulum. As the rope swings through its lowest point, the speed of the bowling ball is measured at 4.00 m/s. At that ...
July 10, 2010

Physic
What is the period of revolution of a satellite with mass m that orbits the earth in a circular path of radius 7820 km (about 1450 km above the surface of the earth)?
July 10, 2010

Physic
An unstretched spring is 11.0 cm long. When you hang an 590 g weight from it, it stretches to a length of 14.0 cm. what is the force constant in (N/m) of this spring? what is the total mass must you hang from the spring to stretch it to a total length of 18cm?
July 10, 2010

Physic
thanks i got the answer :)
July 10, 2010

Physic
with the speed of 8.60m/s and slides 38m
July 10, 2010

Physic
A hockey puck leaves a player's stick with a speed of 8.60 and slides 38.0 before coming to rest. Find the coefficient of friction between the puck and the ice.
July 10, 2010

BIOLOGY TEACHER
Biology teacher help me with two questions. what role do microorganisms play in ecological succession? describe ecological succession in terms of changes in the abiotic parts of an ecosystem
July 7, 2010

BIOLOGY KK think I got it
microorganisms are nonliving and the ecological succession changes the abiotic parts in an ecosystem.
July 7, 2010

BIOLOGY
what role do microorganisms play in ecological succession? they play role in ecosystem by occuping a niche. have i got it down correct?
July 7, 2010

Biology/ms. sue
I don't get how to describe the ecological succession in terms of changes in the abiotic parts of an ecosystem. What words do i use to describe all that, i can't just insert my example as an answer in my work, what do I do?
July 7, 2010

Biology/ms. sue
ms. sue help =-(
July 7, 2010

ms sue y u not helping me
ms sue i wanna get this done before going to sleep, please provide me with help, atleast the first question, i don't get it. could you give me a small anser so i can atleast figure whats going on.
July 7, 2010

BIOLOGY teacher ms sue
but i don't know how to put that into an answer, can you please help out
July 7, 2010

BIOLOGY teacher ms sue
So for ex. the cutting of trees reduces oxygen(air)?
July 7, 2010

BIOLOGY teacher ms sue
so for ex. the clearing of parcel of land which would bring out the plants. is this what ur looking for?
July 7, 2010

BIOLOGY teacher ms sue
Could you put that question in simple terms so i can understand. Im talking about this one describe ecological succession in terms of changes in the abiotic parts of an ecosystem.
July 7, 2010

BIOLOGY
what role do microorganisms play in ecological succession? they play role in ecosystem by occuping a niche. have i got it down correct?
July 7, 2010

BIOLOGY
so it's the tundra.
July 7, 2010

BIOLOGY
could ya tell me what sand dune and wetland refer to?
July 7, 2010

BIOLOGY
which of the following are mature(climax) communities? a tundra b sand dune c temperate rainforest d wetland I'm guessing it's sand dune or wetland
July 7, 2010

BIO teacher help
it means nonliving things in an ecosystem like sunlight, temperature, etc.
July 7, 2010

BIO teacher help
could ya look again? i said yes i do know what it abiotic means.
July 7, 2010

BIO teacher help
i really dont understand that question.
July 7, 2010

BIO teacher help
ms sue i got an answer
July 7, 2010

BIO
yeah, things that are nonliving like sunlight, temperature, etc.
July 7, 2010

BIO
2.Overfishing and replacement of commercially valuable fish by trash fish. 3.Severe forest fires when forests are protected from fires.
July 7, 2010

BIO
how do I describe, didn't I already do that before?
July 7, 2010

?????????
ms sue help me i don't get it
July 7, 2010

BIO
So meaning flooding, fire, pollution?
July 7, 2010

BIO
I just don't know what the question is asking me to do, I don't know how to describe. Ecological succession is the long-term process of natural vegetation communities changing. The community of plants in an area largely determines what animal life will be part of that ...
July 7, 2010

BIO
I really need help with this question, Damon gave me an answer, but I do not know if it is for this question or for the one posted after. This is the only question I need help on, I promise not to post any other questions after this I need help
July 7, 2010

BIOLOGY
which of the following are mature(climax) communities? a tundra b sand dune c temperate rainforest d wetland I'm guessing it's b - sand dune
July 7, 2010

Ecology
I need help
July 7, 2010

???????????
What role do micro-organisms play in ecological succession?
July 7, 2010

MAJOR HELP NEEDED
So this is what I have to do and I really don't get it. I've gotta describe ecological succession in terms of changes in the abiotic parts of an ecosystem. What do I do? Ecological succession refers to the changes that take place over time in the types of organisms ...
July 7, 2010

chemistry
when 45g of an alloy is dropped into 100.0 g of water at 25c, the final temperature is 37c. what is the specific heat of the alloy
May 19, 2010

chemistry
What is 24388 in scientific notation? And. Give the answer to the following calculations in the proper number of significant figures? a. 25,30cm x 0.035cm.
May 16, 2010

chemistry
How many significant figures are in each of the following a.234 b. 2500 c.0.0034. d. 12.00 e. 0.01010
May 16, 2010

2nd grade
She says, "Look in the backyard for rocks."
April 28, 2010

physical science
Inside the cylinders of a diesel engine, the mixture of fuel and air is compressed to about 1/20 of its original volume. although diesel engines have no spark plugs to ignite this mixture, it ignites anyway because_. a) increases in temperature decrease molecular motion b) ...
April 12, 2010

physical science
the same force is constantly applied to two moveable objects. the more massive object will a) travel at the same speed as the lighter one b) increase speed but at a slower rate than the lighter one c) increase speed but at a greater rate than the lighter one d) increase speed ...
April 12, 2010

physical science
a weather balloon filled with gas is released and rises into the atmosphere. as it rises, the balloon__. a) gets smaller because air pressure outside the balloon increases b) gets smaller because gas pressure inside the balloon decreases c) doesnt change size d)gets larger ...
April 12, 2010

phsyical science
the weight of an object is a) the force of earths gravity b) measured in kilograms c) the amount of matter it contains d)never changes no matter where the object moves in our solar system e) the number of particles it contains
April 12, 2010

Pysical Science
Suppose I give you 2kg of a substance at 90 degree C with a specific heat of .75 cal/g degree C. How much ice water will it take to cool the sample to 20 degree C?
April 8, 2010

Chemistry
You have a 1 L container of F2 at 20 degrees C and 1 atm. Subtract the weight of the container , what is the mass of the gas
March 31, 2010

chemistry 121
Microwave ovens use microwave radiation to heat food. The microwaves are absorbed by moisture in the food, which is transferred to other components of the food. As the water becomes hotter, so does the food. Suppose that the microwave radiation has a wavelength of 11.2 cm How ...
March 27, 2010

chemistry 121
Microwave ovens use microwave radiation to heat food. The microwaves are absorbed by moisture in the food, which is transferred to other components of the food. As the water becomes hotter, so does the food. Suppose that the microwave radiation has a wavelength of 11.2 . How ...
March 26, 2010

bio
bacteria
March 26, 2010

6th grade
the change is the difference between final velocity and initial velocity 5-1 = 4m change in velocity
March 26, 2010

spanish
a large familia has a lot and a small family has little
March 23, 2010

Stress factors
chronic stress because it is long lasting compared to short term or acute stress.
March 20, 2010

Social Studies
northwest florida indian tribe
March 17, 2010

math
288
March 12, 2010

math
A balloon in the shape of a sphere is deflating. Given that t represents the time, in minutes, since it began losing air, the radius of the ballon (in cem) is r(t)=16-t. Let the equation V(r)= 4/3 pi r^3 represent the volume of a sphere of radius r. Find (V (open dot) r)(t)
March 12, 2010

Environmental Science
1) Will there be reduced refuse production by our osciety if we can't find new landfills? (I said no because people are apathetic and will do what they've always done). 2)Will the landscape be covered by pyramids if we can't find new landfills? (I said yes because ...
February 26, 2010

Environmental Science
Can someone please explain to me what SEMASS stands for? I googled SEMASS acronym but no site was able to explain what it means and why it's significant.
February 26, 2010

Science
how does a tornado happen?
February 26, 2010

Math
Todd's wieght went from 220 lbs to 190 lbs and Cassidy's wighte went from 150 lbs t?o 135 lbs. Who had the greater percentage of weight loss
February 17, 2010

science
No the answer is 85 because, you subtract 500-415=85.
February 11, 2010

science
In 4th grade science, How could measuring the orbit of a comet help scientists understand when it will next be visible from Earth?
February 7, 2010

us history
Eplain whether Washington was right or wrong about the danger of party polotics and involvement in other countries.
February 4, 2010

English 1
Can someone analyze this I have no idea what it means its from the poem substance, Shadow, and Spirit You had better go where fate leads. Drift on the stream of infinite flux Without joy, without fear: When you must go-then go And make a little fuss as you can.
January 24, 2010

physics
a person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of 18 ms. The cliff is 52m above the waters surface. How long does it take for the stone to fall to the water? With what speed does it strike the water?
January 14, 2010

chemistry
what is the Symbols and Names of Common Metal Ions with More than One Ionic Charge of CuSO4
January 6, 2010

Math
96 fl oz=how many pints
January 5, 2010

culteral Diversity
In the agrarian subsistance technology, which preceded the industrial technology revolution, work was a. Capital intensive b. Machine intensive c. Labor intensive d. Management intensive e. All the above
December 19, 2009

culteral Diversity
The process of acccultration that took place under slavery could best be described as a. A melting pot b. Culteral plurism c. Coercive Anglo-conformity d.Repressive Africanization e. Integration
December 19, 2009

culteral Diversity
The creation of minority group status largely depends om a. The size of the dominant group b. The nature of the contact situation c. Wheather the dominant group is assimilationist or plur alistic d. The degree of industrilization in the larger society e. The degree of mutual ...
December 19, 2009

culteral Diversity
A criticism of the authoritarian personality theory of prejudice is a. to explain individual prejudice b. It explains individual predijudice c. It takes family into consideration d. b and c above e. none of the above
December 19, 2009

culteral Diversity
Selective perception a. is a tendency to see only what one expects to see b. can strengthen and reienforce stereotypes c. Both a and b d. None of the above
December 19, 2009

culteral Diversity
Which of the following is NOT an example of the affective dimension of prejudcise? a. Fear and anger b. Steriotyping and overgeneralizations c. Repulision and hatred d. General dislike e. Distrust
December 19, 2009

culteral Diversity
Which of the following theries argues that status attainment is a direct result of educational levels, personal values, and skills? a. Human capital theory b. Multiculteralism c. Martial assimulation d. Acculteration e. None of the above
December 19, 2009

culteral Diversity
In Milton Gorton's theory of assimilation, the crucial step is from a. Integration to acculteration b. Acculteration to integration c. Assimilation to plurism d. Anglo-conformity to the melting pot e. Integration to intermarriage
December 19, 2009

culteral Diversity
Minority group status affects the different "life chances" including a. Better health care b.Access to wealth and income c. Access to decent housing d. asscess to higher education e. all the above
December 19, 2009

Culteral Diversity
the most important source of inequality arises from a person's relationship to the means of production. This statement might be heard from a a. Capitalist b.Weberian c. Libertarian d.Marxist e. Republican
December 19, 2009

culteral Diversity
Laws on miscegentation referred to laws that a. Prevented people from passing as menbers to another race b. Prevented people of different races from eating together in public restaurants c. Prevented members of different races from intermarrying d. Prevented members of ...
December 19, 2009

Culteral Diversity
The social or physical characteristics that mark the boundaries between groups are highly a. Highly visible b. selected by the minority groups themselves c. Scientifically significant d. Selected for their biological improtance e. subtle
December 19, 2009

Culteral Diversity
The creation of minority group status for Mexican Americans reflected the dynamics of
December 19, 2009

ap world history
Hi,I have to write an essay for my ap world history class but i am confused on how to write a thesis for it.The instructions are "Compare the diffusion of Buddhism from its origin to the sixth century C.E with the diffusion of Christianity from its origin to the sixth ...
November 17, 2009

Accounting
Given the following information for the fiscal year ended June 30, 2001: Product sales: 28,189,612 Service sales: 11,688,793 Cost of goods sold- products: 10,633,956 Cost of goods sold- services: 5,869,106 Operating expense: 14,904,460 Pre-tax operating income: 8,470,883 ...
November 11, 2009

Marine Science
I hope so, thats what I'm putting.
November 10, 2009

Sceinece/Chem
What is the coefficient for H2O when the following equation is balanced: Mg3N2 + H2O → Mg(OH)2 + NH3? When the following reaction is balanced, what is the coefficient for O2? H2 + O2 → H2O Would the answer be 2?
October 25, 2009

10th grade,history
what attitudes toward native americans does this express?
October 15, 2009

Algebra
The (absolute value) x-20 (absolute value) is less than or equal to 6. I did it first with six positive and got x is lesss than or equal to 26. Then I made the six negative and got x is less than or equal to 14. But this is impossible for these to both be true, right? How come...
October 12, 2009

pre calculus
write the slope-intercept form of an equation for a line that passes through A(3,4)and is perpendicular to the line that passes through e(4,1) and F(-2,4)
September 22, 2009

math
She has 3 quarters and 5 dimes
September 21, 2009

Accounting
On April 1, 2009, the company paid an insurance company $5,000 for a two-year fire insurance policy. The entire $5,000 was debited to insurance expense. What is the Dec. 31, 2009 adusting journal entry? Prepaid Insurance xx Insurance expense xx I can't figure out the ...
September 17, 2009

cmc 219
how Internet convergence and related issues about privacy protection affect the following aspects of American life: Education Business Families Government Relationships with the global community
July 16, 2009

cmc210
When the change from sponsored programming to network programming took place, the amount of advertising dramatically increased. Was this a positive or negative development for the general public at the time? Why or why not?
July 9, 2009

Help with maths!
A rectangular field is surrounded by a fence on three of its sides, and a straight hedge on the fourth side. If the length of the fence is 320m, find the maximum area of the field enclosed. So...how should i do it? Does it matter which of the 'three sides' they are ...
June 19, 2009

Maths
Hello, I'm supposed to do this questions using concepts of differentiation with proper workings, and not based on general knowledge. Question: If x + y = 82, find the maximum value of xy. I know that 41 and 41 would give the greatest product... but how should i work it out...
June 19, 2009

chemisty
so its >2HNO3+2KOH=2KNO3+H2O?
June 7, 2009

chemisty
is this correct?: word equation: nitric acid+potassium hydroxide= potassium nitrate balanced symbol equation: 3HNO3+2KOH=2KNO3+H2O
June 7, 2009

9th grade
sugar is a compound that is not made of ions. will it form an acidic,an alkaline or a neutral solution when it is dissolved in water? please expain your answer for me!
June 7, 2009

biology
expain why a 100m runner has a bigger oxygen depth than a marathon runner. im lost please help
June 7, 2009

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