Posts by isabel

Total # Posts: 160

Math
the perimeter of a rectangle is 108 cm. if the length of the rectangle is 5 tikes the width what are the demensions of the rectangle

Physics (pressure)
A barometer has air trapped above the mercury in an inverted tube with the opening in a reservoir of mercury. When the length l of air trapped is 10.0cm, the mercury height h is 72.0. When the tube is slightly lowered into the reservoir, l becomes 8.0cm. What is the new h? ...

Math
Last few steps should be: 10 = ?(20*10 - 100) dh/dt dh/dt = 1/(10?) cm/s

Math
A fish bowl is constructed out of a spherical bowl with diameter 20cm. The bowl was initially empty and water flows into the bowl at a rate of 10cm^3/s. Let V and h be the volume and depth of water in the bowl at time t seconds respectively. Find dh/dt when h is increasing at ...

Math
A cylinder is inscribed in a cone as shown in the diagram below. The cone has a height of 8cm and a fixed radius of R cm. The cylinder has a radius of x cm and a height of h cm. Show that the volume of the cylinder is maximised when x=kR, where k is a constant to be determined.

Physics
1. A dog sits under the only shade tree in its territory. Suddenly the dog desires to dig a previously buried bone. From the tree the dog goes 13 meters at 22.6° north of east. Not finding the bone there the dog then goes 17 meters at 61.9° north of west. Digging at ...

Englsih
In my opinion, I would use : On his way home, he was run over.

English
Thanks, but what would you do if you could not change the order of the sentence and its words?

Englsih
What action verb would you use to replace "got" in the following sentence? On his way home, he got run over. I am out of clues as to what action verb to use in this sentence. Please help me!

Math! Pls Help!
Um are you kidding me? This website is for help.

math
2 11/12

Science
Connexus aye?

Math
16

science
whoops didn't mean to pt that

science
stupids

science
The two insulated beakers contain equal amounts of identical liquids. The temperature of Beaker A is 80°C. The temperature of Beaker B is 50°C. A copper rod connects the beakers. The system is then left alone for several hours. What would you expect to find when the ...

science
is this answer correct?

science
The two insulated beakers contain equal amounts of identical liquids. The temperature of Beaker A is 80°C. The temperature of Beaker B is 50°C. A copper rod connects the beakers. The system is then left alone for several hours. What would you expect to find when the ...

science
or is it c because all the temperatures are very close?

science
there is no rate of the cooling or hoow fast they are changing

science
The two systems shown below are identical except for the rod connecting the two beakers. Initially the temperatures of the beakers are as follows: Beaker A = 88°C Beaker B = 42°C Beaker C = 88°C Beaker D = 42°C Four minutes later the temperatures are as follows...

science
so its d

science
i did the math and the answer was b it this correct?

science
Two insulated beakers contain different amounts of identical liquids. Beaker A contains twice as much liquid as Beaker B. The temperature of Beaker A is 80°C. The temperature of Beaker B is 40°C. An aluminum rod connects the beakers, and the system is left alone for ...

science
ok thanks

science
where did u get the 62.5 degrees celsius from?

science
i don't really understand your work. i'm oly in 6th grade can u make it a little easier

science
The two insulated beakers contain equal amounts of identical liquids. The temperature of Beaker A is 85°C. The temperature of Beaker B is 40°C. A metal rod connects the beakers. Five minutes later, the temperature of Beaker A is 75°C and the temperature of Beaker B...

science
i think it is just a

science
The two insulated beakers contain equal amounts of identical liquids. The temperature of Beaker A is 80°C. The temperature of Beaker B is 50°C. A copper rod connects the beakers. The system is then left alone for several hours. What would you expect to find when the ...

Reading and Writing
Thank you !

Reading and Writing
What is a cogent essay? Is a cogent essay an argumentative essay?

Statistics
1200 high school freshman were randomly selected for a national survey. Among survey participants, the mean grade-point average was 2.8, and standard deviation was 0.6. What is the margin of error, assuming a 95% confidence level?

Grammar
Thank u

Grammar
That was number 6. on the paper. Oxen is an animal. Im just confused on what is the irregular plural noun.

Grammar
What is the irregular plural noun? The teams of oxen pulled the plows across the field. (I CANT FIND THE ANSWER DEPENDING ON THE DEFINITIONS ON THE PAPER AND ONLINE)

science help
It is, A i researched everywhere. The correct answer is A!

Help: Social Studies (Please check my answers)
that's why you don't trust ppl on the the internet :p

religion
im in the library trying to figure out this HARD question for homework:[

Algebra
Peter buys 84 yards of fence to make a play area for his puppy. He wants the area to be 28 yards long. What is the area of the play area if he uses the entire fence he bought?

algebra 2
find a1 for given geometric series. Sn= 405, r=3, n=4 I don't know how to start the problem

Math
223

math 3
1 gallons = 16 cups 16*8= 128 20*2= 40 128-40=88 cups Hope I was helpful

olgc
a circle is divided into 18 equal parts. how many degrees is the angle for each part? how many degrees is the angle for the 5 parts?

AICE math
I was confused about if I should just plug in the value or take the derivative of the function? But Thank you!

AICE math
A 30 foot ladder is leaning against a house(see figure). if the base of the ladder is pulled away from the house at a rate of 2 feet per second, the top will move down the wall at a a rate of r= 2x/(sqrt(900-x^2) ft/sec, where s ist the distance between the base of the ladder ...

College Physics
A 57.0 cheerleader uses an oil-filled hydraulic lift to hold four 110 football players at a height of 1.40 . If her piston is 19.0 in diameter, what is the diameter of the football players' piston? The density of the oil in the hydraulic system is 900 kg/m^3.

Chemistry
absorbed

chemistry
The volume of a mass of gas is 300 ml at 25 Celsius and 685 torr. What will the gas occupy at STP?

Geometry
200%

math
5/6

Math (immediate help, please!)
A bicycle has 26-inch diameter wheels. If the wheels revolved 2 times after the brakes were applied, the stopping distance is approximately _____. What's the answer? Provide a thorough explanation as well, please.

Math (immediate help, please)
A bicycle has 26-inch diameter wheels. If the wheels revolved 2 times after the brakes were applied, the stopping distance is approximately _____. What's the answer? Provide a thorough explanation as well, please.

Math (immediate help, please)
Find the area of a regular pentagon with a side 8 centimeters. Please provide an explanation!

Geometry (immediate help and explanation)
Thanks! But one question..um, where did you get the triangle?

Geometry (immediate help and explanation)
A bridge is the shape of an arc of a circle. The bridge is 8 feet tall and 36 feet wide. What is the radius of the circle that contains the bridge? Round your answer to the nearest tenth.

math
27

Math
Farmer Bob is considering buying a new field that is next to one he already owns. The field he is considering is a perfect square. The fence along each side of this square field is made of old logs and is a third of a mile lone. If he can walk at a rate of three miles per hour...

Math
Mr. Brown needs to buy some fencing for his garden (too many rabbits have been getting in and eating the vegetables). If his garden is twenty-three meters by thirty-four meters and is in the shape of a rectangle, what length of fence does he need to build?

math
What is the quotient of 100 and the sum of b an 24

college chemistry
if 2.00g of Zn is allowed to react with 2.00g of CuSO4 according to the equation CuSO4(aq) + Zn(s)-----> ZnSO4 (aq)+ Cu(s) how many grams of Zn will remain after the reaction is complete ?

accounting
Y= a + bx y= 567,000 + (4.00* 38,000) y= 567,000 + 152,000 y= 719,000 estimated manufacturing overhead Predetermined overhead rate= estimated manufacturing overhead/ estimated allocation base POR= 719,000/38,000 POR= $18.92 per direct labor hour

Statistics
b. yes a confidence interval has the meaning that a % likelihood exists the population mean is within the interval

World History
Hi, I've been assigned a project where I'm playing the role of a history revionist that has to make a top ten list of the problems with bureaucracy in Qing Dynasty China. Also, this has to appeal to senior citizens somehow (that's my assigned audience). I've ...

math
the ratio of boys to total of students is 2:5.the number of girls of the student is 3. there are 123 girls.how many boys are there?

books
i know she is fictional, I thought in a description of who this character was would have where and when she was born. I haven't gotten my romeo and juliet book in english yet, but my teacher assigned me a project that required lady montage birthday in it, so I figured you ...

books
I am having trouble finding the birth date of Lady Montague from Romeo and Juliet. If you can please help me i would really appreciate it!!!!!!!!!!!!!!! Thanks sooooooooooo much, Isabel

physics
.29

Math
Find lim θ→0+ A(θ)/B(θ)

Physics
Block 1 of mass m1 slides from rest along a frictionless ramp from height h and then collides with stationary block 2, which has mass m2 = 3m1. After the collision, block 2 slides into a region where the coefficient of kinetic friction is μk and comes to a stop in ...

Stats - Please help
I have data on ATPase activity of two types of muscle at different concentrations of Ca 2+ and although the leg muscle seems to be more responsive than the flight i have to prove this statistically I don't know whether my data is paired or not. I think that it is not ...

Science / math
I have data on ATPase activity of two types of muscle at different concentrations of Ca 2+ and although the leg muscle seems to be more responsive than the flight i have to prove this statistically I don't know whether my data is paired or not. I think that it is not ...

physics
In a room that is 2.78 m high, a spring (unstrained length = 0.30 m) hangs from the ceiling. A board whose length is 1.94 m is attached to the free end of the spring. The board hangs straight down, so that its 1.94-m length is perpendicular to the floor. The weight of the ...

ENGLISH
IM DOING AN ACROSTIC POEM ON THE WORD SPRING AND I NEED HELP FOR I CAN I GET ANY IDEAS ASAP DO TOMORROW 4/13/2011 THANK :]

math
unpaid balance at the end of the 10th year? loan amount of 250,000

homophones
is the word days a homophone?

math
in a mathematical concept,a formula or graph

science biochem- please help!!!!
I don't know where to start with it? A tube is set up for radioimmunoassay containing antibody with a capacity for binding 1ug antigen. Both labelled (50,000 counts per ug) and unlabelled antigen are added to the tube. Work out a formula to calculate the amounts of counts ...

English
What actions could the friar and nurse (from Romeo and Juliet) have taken in act 4 that would have changed the outcome?

English plural form
Kellys. Saying "Kelly's" would imply possesion.

English
What actions could the friar and nurse (from Romeo and Juliet) have taken in act 4 that would have changed the outcome?

chemistry
what would happen if PbI2 were to be ingested into your blood stream?

math
explain how you know tt 3/6 i greater than 1/3 but less than 2/3

physics
An "energy bar" contains 22g of carbohydrates. If the energy bar was his only fuel, how far could a 68 kg person walk at 5 km/hr ?

chemistry
DETERMINE the enthalpy for the reaction CH4(g)+NH3(g)->HCN(g)+3H2(g)

math
how can i drop an egg 4 feet without breaking it

pre algebra
100- 3(2.3) + 5.6

pre algebra
evaluate (m+n)-3 power if m=-1 and n=-5

Math
If i'm given the equation 4.23= -.19t^2+2.56t-2.37 how do i find the value of t?

math
what is the sixth term in this sequence 83,77,71,65

Math
#1) 3y + 12 / 8y third power divided 9y + 36 / 16y third power #2) 8x second power / x second power - 9 x 2 second power + 6x +9 / 16x third power

math
r=7.5 what is the diameter circumference, and area

algebra 1
what is the y-intercept of the graph of 4x+2y=12? i was giong well on my scratch paper and i mest up and i got stuck and had to erase everything and do it over answers: a -4 b -2 c 6 d 12 please and thank you i need how they do the work i cant decide!

personal finance
would you purchase a $100,000 20 year annuity today for $15,000 given a required rate of return of 14.5%? Why, what is the value of the annuity?

Chemistry- Writing Net Ionic equations
If ammonia reacts according to the following equation how many kilograms of NO could be produced from 10 kg of NH3 if the percent yield of NO is 80%? 4NH3+ 5O2 yields 4NO+ 6H2O

Physics
Mercury is poured into the open end of a J-shaped glass tube, which is closed at the short end, trapping air in that end. How much mercury can be poured in before the mercury overflows? Assume air to act like an ideal gas. The long and short arms are 1 m and 0.5 m long, ...

math
graph y=x2,y=2x2 and y=1/2x2 on the same

Physics
Mercury is poured into the open end of a J-shaped glass tube, which is closed at the short end, trapping air in that end. How much mercury can be poured in before the mercury overflows? Assume air to act like an ideal gas. The long and short arms are 1 m and 0.5 m long, ...

Physics
Mercury is poured into the open end of a J-shaped glass tube, which is closed at the short end, trapping air in that end. How much mercury can be poured in before the mercury overflows? Assume air to act like an ideal gas. The long and short arms are 1 m and 0.5 m long, ...

science
what drives the lithospheric plates

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