Thursday

April 24, 2014

April 24, 2014

Total # Posts: 470

**Physics**

A 4.1 kg block is attached to a spring with a force constant of 550 N/m , as shown in the figure. Find the work done by the spring on the block as the block moves from A to B along paths 1 and 2. W=? How do your results depend on the mass of the block? Specifically, if you inc...

**Genetics**

Show the F1 and F2 progeny phenotypic and genotypic ratios of the following dihybrid cross involving unlinked purebred Mendelian traits (tall plants, long stems X dwarf plants, short stems) under the following conditions: a. the alleles for tall plants and long stems are domin...

**math**

Max, James, and Brett were playing basketball. One of them broke a window, and the other two saw him break it. Max said, "I am innocent." Jamess said, "Max and I are innocent." Brett said, "Max and James are both innocent." If only one of them is ...

**chem**

A chemist requires some 3-hexanone for a reaction, but only has some 3-hexene available. Explain using chemical reactions, how the 3-hexene could be converted to 3-hexanone. Include the conditions needed for each step. (You will need two steps).

**MLA in-text citations**

A professor gave us an assignment based on one of three websites. The website I chose has multiple pages, each with a title, but none of the pages have titles. When citing a fact or quotation from a certain page, should I use the page's title in the in-text citation?

**Physics!! **

got it! 11.879!!! Thanks didn't see the g on the .2....awesome!!!!

**Physics!! **

3.794 is wrong too sqrt(2(.2)(36))

**Physics!! **

now i getting 3.878 and it still wrong...=-(

**Physics!! **

This is what I done before I end up getting v=26.5887 and for some reason it's wrong =(. I not sure why though.

**Physics!! **

An elevator's cable snaps and its emergency brakes start gripping at the secondary line in order to slow its descent. The elevator and passengers weigh 389 kgs together and fall under the influence of gravity (9.81 m/s2). The coefficient of friction between the brakes and ...

**social studies,word unscrambler**

the and thats your andsexfdjwfdk

**algebra**

3+1/7x +5x=453/7

**Genetics**

A flowering plant with orange petals is self-crossed to yield the following phenotypes: red flowers- 30 orange flowers- 62 yellow flowers- 33 Choose symbols and designate the genotypes of each of the above phenotypes. I am pretty sure that the above data suggests incomplete do...

**Genetics**

Two traits (stem length and seed color) are simultaneously examined in a cross of two pure-breeding pea plant varieties. A tall green plant is crossed with a dwarf yellow plant, and the resulting F1 plants are self-crossed. A total of 640 F2 progeny are phenotypically characte...

**Calculus**

I'm having trouble with the following problem: Find the volume of the solid generated by revolving the region about the given line. The region is in the first quadrant bounded above by the line y= sqrt 2, below by the curve y=secxtanx, and on the left by the y-axis. Rotate...

**math**

How do you write (2x3)x5=30 without changing the number sequence?

**Calculus**

Thank you!

**Calculus**

Can someone look over my work and tell me if my steps look correct? I'm trying to correct some problems that looked wrong. Instructions: Find the total areas between the given curves. 1. x= (y^3) and x=(y^2) on the interval [0,1] (integral from 0 to 1 of) ((y^3)-(y^2))dy =...

**Calculus**

I still keep getting 4. At this step: area= int (3-2y^2-y^2) dy = int (3(y^2-1) dy shouldn't it be int(3(1-y^2)? I did this: 3int(dy)-3int(y^2)dy= 3y- (3(y^3)/3) = 3y-(y^3) from 1 to -1... filling those in, I get 4. Am I still making a mistake?

**Calculus**

We're doing a lab in my Calc II class and I'm stuck on this question. I tried to do it by looking at instructions for a similar question in the book, but it made me more confused. Here is the question and my work: Find the area of the region enclosed by the lines and c...

**science**

How would you describe how tissues form your heart?

**science**

How would you describe a muscle cell?

**Science**

How would you describe a bone cell?

**calculus**

I am studying for a final exam and in our review packet we have this question, which I am having trouble with: lim (x-->0) ((e^x)+x)^(1/x) I tried this problem two ways. The first was with L'Hopitals rule... lim(x-->0) (1/x)((e^x)+x)^(1/x-1) * (e^x+1) but that doesn&...

**math**

what is the function rule for input x 1,2,3,4,5,6 and output y 1,3,5,7,9,11 Thank you very much!

**math**

what is the function rule for input x 1,2,3,4,5 and output 3,2,0,-1,-2

**math**

I really need help. Please help. Solve for x: log(subscript)3(3x+1)-log(subscript)3(x-1)=2

**Calculus**

For the function f(x)=10-4(x^2), find a formula for the lower sum obtained by dividing the interval [0,1] into n equal subintervals. Then take the limit as n->infinity to calculate the area under the curve over [0,1]. I only need help with the first part. I don't really...

**unit rate**

how do u find the unit rate

**Health**

it can help by showing u unhealthy thingsand can prevent younger child from getting obbese by making the parents more aware of unhealthy foods idk im only in 6th grade

**unit rate**

ok im having trouble with unit rates i cant seem to get them can sum 1 help me or like giv an example to me so i can do the rest of my hw and understand it

**unit rate**

find the unit rate 175 calories in 12 ounces

**unit rate**

find the unit rate $920 for 40 hours

**science**

wen u stop beathing

**college**

What is the difference between Mahayana and Theravada Buddhism?

**journal article about running**

i need to find a peer reviewed journal article pertaining to my chosen behavior modification project, which is to start running regularly. the article should be at least 3 pages in length and must include empirical research.

**year 8 art**

thanks for your help but im sorry im still stuck i don`t understand how to start the story off. ive got to write about what i think is happening in the paintings ive looked on the sites everyone has been kind enough to find . its the mona lisa and the michaelangelo im struggli...

**year 8 art**

ive got the flu and i have loads of homework to do and i am strugging with this one for my art homework i have got 4 pictures of paintings. 1/Michaelangelo, creation of Adam, 2/ Botticelli, Birth of Venus , 3/ Mona Lisa , 4/ George and the Dragon. I need to tell a short story ...

**hcc**

how do the masses iof electrons compare with the masses of protons?

**grammar**

I meant, is the date 1901 a proper noun?

**grammar**

Is the date "1901" a proper know?

**Biology**

Why does it make a difference if you measure metabolic rate in terms of O2/animal or O2/g?

**Ethnic Diversity**

Yeah im confused! lol i just needed some help for info. its 2 years later after yall got the help now im needing it ha

**Ethnic Diversity**

Yeah im confused! lol i just needed some help for info. its 2 years later after yall got the help now im needing it ha

**biology**

why are animals shaped differently in cooler climates than in warmer ones?

**Math**

Can someone help me with this I am very confused When managing a business, it is important to take inventory of where your money is spent. You have a monthly budget of $5,000. Refer to the table below and answer the questions that follow. Round your answers to the nearest tent...

**Data management**

A coin was tossed 1000 times in an experiment to decide whether it really had an equal chance of coming up heads or tails. The decision was made in advance to declare the coind NOT FAIR if the observed outcome of the experiment had less than a 5% chance of happening. Would the...

**Data Management Help!**

A coin was tossed 1000 times in an experiment to decide whether it really had an equal chance of coming up heads or tails. The decision was made in advance to declare the coind NOT FAIR if the observed outcome of the experiment had less than a 5% chance of happening. Would the...

**Data Management, Math**

Chebyshev's Theorem states that withing 2 standard deviations (regardless of the mean) that 95% of data is contained. There is also a theorem that states the minimum % of data that will lie between 2 standard deviations. Chebyshev's Theorem states that regardless of th...

**statistics**

mu=78 population std deviation=12 Normal Distribution n=16 alpha level=.05 * compute the power of the hypothesis test if the program has a 3-point effect. I came up with 83.88 % * compute the power of the hypothesis test if the program has a 6-point effect. I looked at the exa...

**math**

The base is 25/16.

**math**

The base is 25/16.

**math**

Wouldn't that be a decimal answer. Oh, and yes -3/2 is an exponent.

**math**

How would I simplify this problem using logs? (25/16) -3/2

**Calculus**

What is the volume of the region enclosed by the planes x+z = 3, y=x, y=0, z=0, and the cylinder x²+y²=1? Is the answer 5 because I keep on getting different answers for this?

**Science and acrostic poems**

jk...sorry i dont relly kno

**Science and acrostic poems**

BOO!

**math**

How do multiply mixed numbers and fractions

**Probability. NEED HELP!!!**

figure out how many cards are in a deck {52} then take the number of cards in a deck and compare it to the numbers of cards in a four of a kind {4}

**Data Management, Math**

Thank You Very Much!!! Very Much Appreciated!!!

**Data Management, Math**

10 of your friends (including you..so 10 altogether) are going to have a draw between all of you. Each person gives $10 (for a total of $100). There will be five, $20 draws. One per week for 5 weeks. For the first draw, every person gets a ticket. One ticket is picked from 10 ...

**math**

calculate (x-3)(x+2)

**Science**

Name and describe two ways in which magnetism is used in technology related to medicine? Im really not sure of the answer to this, but i do know that magnetism is the force of attraction or repulsion.

**Geometry**

wow, that was simple! thanks so much!

**Geometry**

What is a vertex? for example, there is a triangle with the point of it circled. the book asks if it's a vertex. i looked it up on google and dictionary, but i don't get it. thanks for any help!

**science**

What is the corrected radiocarbon age if the orginal radiocarbon age is 2100?

**English**

I'm a little confused about making something possessive. For example, if I were to write America's history is fascinating. would that be correct, or would "Americas", or "Americas'" be right? Also, suppose you wanted to say that a dog belonged t...

**prefix and suffix**

This is the worst website ever it won't listen to you and it's no help about prefixes

**ict**

i need to design a luggage tag for ict homework but i don`t know what is written on the tag. i know you put your name but else is needed. thanks for your help

**United States**

I need to know what the difference is between a commonwealth (Puerto Rico) and a territory (Guam) of the United States. If anyone could help, that would be great!

**Math**

Another way to do it would be 5.50 divided by 2 to find the price of one t-shirt, then that number times 5.

**Physics**

so it would be: (retarding force)(1020m)= (1/2)(8042N)(35 m/s) and the retarding force= 137.98?

**Physics**

Given: g=9.81 m/s square. The parachute on a race car that weighs 8042 N opens at the end of a quarter-mile run when the car is traveling 35 m/s. What net retarding force must be supplied by the parachute to stop the car in a distance of 1020 m? Answer in units of N. I have no...

**Physical science**

When you drop a 0.36 kg apple, Earth exerts a force on it that accelerates it at 9.8 m/s^2 toward the earth's surface. According to Newton's third law, the apple must exert an equal but opposite force on Earth. If the mass of the earth 5.98x10^24 kg, what is the magnit...

**math**

i need help w/ math and parentheses here is the question: 5=3+4-2/1 and i have to add parentheses.

**SCIENCE**

yeah like how do they relate 2 science??

**SCIENCE**

science concept map!! test tubes matter oxygen please please please please HELP!!

**Science**

how do test tubes relate to science??

**create a country**

I am supposed to create my own country and I need to come up with a creative name for it. Any ideas?

**Chemistry**

why do some combinations of ionic compounds form a precipitation while others do not

**Chem**

Thank you.

**Chem**

Why does sodium in phenolphthalein change color?

**science**

what kind of consumer always follows a producer in a food chain?

**DT**

What are the three main properties of a Conker shell ?

**Chem**

you would use Calcium because its the limiting reactant? So... 40.078/131.015 = .305903 Then... 2.55g X .305903g Ca/1g = the theoretical yield?

**Chem**

Question: "Calculate the theoretical yield of calcium carbonate of you react 2.55g of calcium chloride dihydrate with an excess amount of sodium carbonate." I got the molar mass of calcium chloride dihydrate which is 131.015 g/mol, but Im not sure how to start the eq...

**Biology**

is it water?

**Biology**

The most abundant molecule found in all types of cells is?

**Math ... HELP!!!!!**

Find the factors of 78 and 104,what is a factor that is the same number on each? That is the answer!:-)

**Chemistry**

so like if the ratio was 2:4 it would become 1:2?

**Chemistry**

ok so here's the question- For the compound Ge[S(CH2)4 CH3]4, determine: a) the ratio, by number, of C atoms to H atoms b) the ratio, by mass, of Ge to S I know this can't be THAT hard...but I'm really not sure on how to get the ratio. for a would I just add up the...

**Gen. Chemistry**

How do I "determine the mass percent of H2O in the hydrate Cr(NO3)3 * 9H2O to 3 significant figures"?

**physics**

A ball is thrown downward, with an initial speed of 8.09 m/s, from a height of 30.1 m. After what time interval does the ball strike the ground?

**physics**

A dog searching for a bone walks 2.87 m south, then runs 22.5 m at an angle 30.5 north of east, and finally walks 5.91 m west. Find the direction of the dog's resultant displacement vector. Give your answer as an angle in degrees, with the angle measured counterclockwise f...

**physics**

A dog searching for a bone walks 4.31 m south, then runs 8.93 m at an angle 22.0 north of east, and finally walks 10.0 m west. Find the magnitude of the dog's resultant displacement vector.

**Literature**

Thank you very much, Ms. Sue. Does this sound like a good opening line for my report? The Time Machine, by H.G. Wells,is an American literature classic relating the tale of a young scientist who travels through time with the help of his invention, the time machine.

**Literature**

But does the author write in this particular book what time frame the main character lived in?

**Literature**

I am writing report on the novel The Time Machine, by H.G. Wells. I am supposed to write when the story takes place. I have searched through the book and the internet and can't find any hints as to what time frame the young scientist lived in. Please help!

**American History**

I need help writing a biography on John D. Rockefeller. I don't know much about him, but every time I search under his name I come up with a really complicated, long biography. I just need some information that a sixth grader can understand. Thanks for any help! These site...

**AP Chemisty**

N2(g)+3F2 yields 2Nf3(g) Delta H(degree)298=-264KJ mol-1;Delta S(degree)298=-278J K-1 mol-1 The following questions relate to the synthesis reaction represented by the chemical equation above. a.)CAlculate the value of the standard free energy change, Delta G(degree)298, for t...

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