# Posts by Anonymous

Total # Posts: 109,677

Physics
T = spring tension WHEN NO FRICTION: Object 1 force up from table = 5 g but irrelevant, balanced by gravity 5 g down horizontal force = T so T = 5 a Object 2 force down = 9 g force up = T so 9 g - T = 9 a WITH Friction Object 1 Horizontal force = T - mu (5 g) = 5 a Object 2 9 ...

Physics
Ke of block = (1/2) m v^2 when spring is uncompressed (a) work done by gravity on mass is m g h = .263*9.81*.118 Joules (b) work done by spring on mass is -(1/2)kx^2 = -.5(252 N/m)(.118)^2 (c) so because v = 0 at bottom initial Ke + work done by g = work done on spring by mass...

math
No one wants to solve it, steve

World History
I am not sure Haiti counts as South America.

Mathematics -binomial theorem
You are welcome.

Mathematics -binomial theorem
(1 + .01)^5 = 1^5 + 5(1)^4*.01 + (20/2)(1)^3*.01^2 etc

Physics
first check the density of this object. .27 kg/.000094 m^3 = 2872 kg/m^3 water density is 1000 so this thing sinks. The tension in the string will decrease by the volume of the object * density of water * g = .000094 * 1000 g = .094 g Newtons the water pushes up with .094 g so...

Calculus
k(x) = f(x^4). Which of the following is k''(x)? a. 2xf''(x^2) b. 4x^2f''(x^2) c. (4x^2+2x)(f''(x^2)) d. 4x^2f''(x^2)+2f'(x^2) e. 4x^2f''(x^2)+2xf'(x^2)

Math
NO!! If the volume goes up the pressure goes down P1 V1 = P2 V2 84 * 36 = P2 * 216 14 Pascals

Physics
Think about it or google oil slick reflection wavelengths and look at the geometry in the images. You will see that the shorter the wavelength the thinner the film.

Physics
Which is the shorter wavelength ?

Physics
If you google pinhole camera you will find diagrams in the images.

Physics
Draw a diagram, similar triangles, ratio is 1/2

chemistry
Lab: Determining the Quantity of Vitamin C in Fruit Juice Vitamin C, also called ascorbic acid, is commonly found in commercial fruit juices and drinks. In this activity you will analyze data collected from a titration analysis of a fruit juice. The nutrition facts for a 200-...

chemistry
Lab: Determining the Quantity of Vitamin C in Fruit Juice Vitamin C, also called ascorbic acid, is commonly found in commercial fruit juices and drinks. In this activity you will analyze data collected from a titration analysis of a fruit juice. The nutrition facts for a 200-...

Pre-Algebra
well, Google distributive property 4a(a^2) = 4 a^3 4a(7a) = 28 a^2 4a(4) = 16 a Now add :) ======================= distributive property again 2y(3y-2) = 6 y^2 - 4 y -3(3y-2) = -9y + 6 now add 6 y^2 - 13 y + 6 works every time

chemistry
What volume of H2 is produced if excess nitric acid (HNO3) reacts with 46.3 g of magnesium 2HNO3 + Mg ? H2 + Mg(NO3)2

I agree with you. It is very expensive to grow coffee beans in Iceland and at least as difficult to fish for cod in Brazil.

Maths
f = 5 d f+10 = 2(d+10) so 5 d + 10 = 2 d + 20

economics
A description of the market form in which milk producers operate?

math-precalculus
help me please.. and please provide steps so I can follow. sec(2?)=3... solve for all solutions on [0,2?]

Social studies (Mr.Sue CHECK MY ANSWERS PLZ)
Only question wrong was #6, which was B. Bank A. Compound Interest

Social studies (Mr.Sue CHECK MY ANSWERS PLZ)
I agree with your replies assuming that payroll taxes in #14 means FICA (social security and medicare) which are federal. All the others are also state taxes here in Massachusetts for example.

history
the answers to the quick check are 1~ C 2~ A 3~ D 4~ B 5~ B

history
the second one is B, and the last one is also B

Health, Fitness, and Nutrition
Carbohydrates are the body's main body supply of energy But I dont know the other one :(

Steve has shown you how. I then tried to simplify the integration process The problem is that even if you use Wolfram for the integration of ln (x+2)dx/x you get a messy function. I bet your teacher did not expect you to run into that and therefore suspect an error in the ...

I bet you have a typo somewhere but the basic idea is that you are given the RATE of filling = F-E To find the AMOUNT, you must integrate the rate over time. Then of course you have a constant of integration which is determined by the amount in the bucket at t = 0

I also hit the wall but took the following steps which might help: let z = t+2 then t = z-2 and dz = dt let Q = amount in there and it is 0 at t = 0 then dQ/dt = dQ/dt = (z+5)/z -ln(z+2) /z so integrate z dz/z + 5 dz/z - ln(z+2)dz/z = z + 5 ln z - a mess even with Steve's ...

algebra
Y=4.50g+3 Because every time she plays a game it will cost her 4.50 but she doesn't have to rent shoes every time, just once. So for example if she choose two play 4 games then the cost would be 4.50(4)+3

Physics
A plutonium- 239 nucleus initially at rest undergoes alpha decay to produce a uranium-235 nucleus. The uranium-235 nucleus has a mass of 3.90 x 10^-25 kg and moves away with a speed of 2.62 x 10^5 m/s. Determine the minimum wage electric potential difference that is required ...

Biology-Genes
red fish-recessive green fish-dominant -Can two red fish mate and have green offspring? Vice Versa?

mechanics
Find the greatest and least resultant of two forces whose magnitude are 12 N and 8 N respectively

maths
Draw a line segment xy of length 12.8cm.find a point z on xy,which divides it in the ratio 4:5.write the steps of construction

physics
Calculate the tension in a vertical strand of spider web if a spider of mass 8.00Ãƒâ€”10Ã¢Ë†â€™5 kg hangs motionless on it. (b) Calculate the tension in a horizontal strand of spider web if the same spider sits ...

Math
45% of 40 is 18% of what number?

Physics
In what part of the electromagnetic spectrum does the wavelength 0.0141 nanometers belong in?

Physics
r = 0.40 meters angular velocity = omega = w linear velocity = v v = w r = 20 m/s so 20 = w * 0.40 w = 200/4 = 50 radians/second so for part b 50 radians/s * 5 s * 1rev/2pi rad =125/pi revs

economics
What is South African government providing and for who in terms of welfare payments and consumer subsidies?

Physics
1800 rev/min * 2 pi rad/rev * 1 min/60 s = Omegai 1200 similarly ---> Omegaf d omega = (Omegaf-omegai) dt = 25 s so d Omega/dt = alpha = d omega/dt average angular velocity = (Omagaf+Omegai)/2 total radians = average vel * 25 sec total revs = total radians/2pi

Physics
(2 k Q^2/a^2) cos 30

Math
81

Geometry
Two circles touch each other. One of the circles has a diameter of 26 cm and the other circle has a diameter of 12 cm. Write down (a) the least distance between the centres of the two circles, (b) the greatest distance between the centres of the two circles

Chemistry
The density of aluminum is 2.70 g/ml. What is the mass of a cube of Al that measures 2.20 cm on each side?(remember significant figures and to include the units of g in your answer, remember that 1 ml=1 cm3) Need help can someone go step by step so I can understand how to do it

history
ok will do!! thank you for your help :)

history
sorry I meant speak instead of speech

history
Opps sorry, could you help me fit this into what I already have please? ...People are allowed to speech freely and openly about whatever they think is important, and are allowed to tell the government what the people want

history
Ok here is mine. The congress is not allowed to make a law that includes a religion, people are free to worship whoever they believe in, worship where ever they think is the most appropriate place, and to fight for their beliefs.

history
Can anyone please paraphrase the first amendment

Georgia State History
Which of the following is a use of credit? A)buying groceries with cash B)purchasing home by taking out a mortgage C)purchasing something in exchange for a service D)paying with a personal check***

Math
So it's A???

Math
5 x^2 so 5 is coef of x^2 2 x so 2 is coef of x the -4 is a constant, not a coefficient.

math
Try typing 75*0.6 into Goggle :)

Math
I do not see your table. However if there is just one of each color of each thing then 1/4 * 1/2 = 1/8 The hat could be any old color.

Pre- Algebra
(1/6)(120)

m
what are the first four terms represented by n(n-2)-3

math
if you bet 9 on the green I bet 11 on the white although the probability of green = 9/20 and the probability of white = 11/20 the ODDS of green are 9/20 / 11/20 = 9/11

Maths
Nick is five years older than Ben. The sum of their ages is 33. How old is Nick?

english
An extensive list that identifies sources cited in your research report is called a(n):

Geometry
tan A = .11 = rise/run A = 6 degrees 17 minutes

physics
falls 4 meters v = -g t h = Hi - (1/2) g t^2 g = 9.81 m/s^2 so 0 = 4 - 4.9 t^2 t^2 = 4/4.9 t = .904 seconds v = -9.81 * .904 = -8.87 meters/second

MATH
Y

math
Janine is considering buying a water filter and a reusable water bottle rather than buying bottled water. Will doing so save her money? First, determine what information you need to answer this question, then click here to display that info (along with other info). How much ...

Math
1000(1.3)(.75)

Math
slope = dT(h)/dh = -0.003

Math
sqrt (x) = 6 x x = 36 x^2 but may introduce false solution along with correct one 36 x^2 -x = 0 x(36 x -1) = 0 x = 0 or x = 1/36 x = 0 works, 0 = 0 if x = 1/36 1/6 = 6/36 yes that also works so x = 0 or x = 1/36

Math 6b
yes, 1/2 * 1/6 = 1/12

Science
F = m a F = 90*.5 = 45 N so I agree with you Maybe they are rounding to one significant figure because they say 0.5 and not 0.50 ?

Math
check it (It works :)

Math
well, the highest power is 2 to get x-2 out of this (1x^3-3x^2+1x+2)/(ax^2+bx+c) = [ x - 2 + (-2x+4)/(ax^2+bx+c)] so multiply [ x - 2 + (-2x+4)/(ax^2+bx+c)] by (ax^2+bx+c) = -2x+4 -2 (ax^2+bx+c) +x (ax^2+bx+c) = 4-2c -2x-2bx+cx -2ax^2+bx^2 +ax^3 which has to be x^3-3x^2+x+2 so...

math
1 - probability of yellow 1 - 2/16 14/16 7/8 So it turns out I agree :)

Math
75

math
maybe: y(x) = 2 x + 4

science
initial energy = (1/2)m v^2 + m g (10) = m(.5 v^2+98.1) final energy = m(98.1) so 98.1 = .5(.5v^2 +98.1) 2(98.1) = .5 v^2 + 98.1 .5 v^2 = 98.1 v = sqrt(2*98.1) v = about 14 m/s

science
50 * 2*10^3 = 10^5 Joules

Math-age problem
43 67

Math
j = 20.281718

algebra
If the length of each edge of the prism is cut by 13 , the surface area will be 13 of the original surface area.

algebra
If the dimensions of the rectangular prism are doubled, the surface area will increase 4 times.

algebra
If the dimensions of the rectangular prism are increased 4 times, the surface area will increase 8 times.

Math
E(m) is earnings as a function of number of times m E(m) = 20 m

Physics
1.16 m is tiny compared to the radius of 1.06*10^3 meters so I will assume g is constant for part (a) m g = G m M/r^2 g = 6.67*10^-11 (1.95*10^13)/(1.06^2*10^6) = 11.6*10^-4 m/s^2 d = (1/2)gt^2 =1.16 for part (b) the kinetic energy + potential energy at the bottom = potential ...

That is ok, we did not need it :) Thanks anyway. The other answers apply to another president entirely.

agree with both

It is not B or D. If the people in the photo are Asian in 1800s laborer garb it could be A If it is people from many places in 1920s garb it could be C depends on what is in the picture.

Probability ,math
permutations 4! = 4*3*2*1 = 24

math
You're planning on making 4 meatloafs for a party. You go to the store to buy breadcrumbs, and see they are sold by the canister. How many canisters do you need to buy? •How much breadcrumbs does the recipe call for? It calls for 1 1/4 cups of breadcrumbs. 1 canister ...

Algebra
4 x^3/2x^2 = 2x 10 x^2 /2 x^2 = 5 3 a/2x^2 = (3/2) a/x^2 {which is 1.5a x^-2} now add (distributive property) 2x + 5 + 1.5 a x^-2

makes no ense
Your passage seems not to relate to the questions.

math
Which of these glasses contains more liquid? Glass A contains about twice as much as glass B Glass A contains about 20% more than glass B Glass A and B contain about the same amount Glass B contains about 20% more than glass A Glass B contains about twice as much as glass A

math
the volume of the canister is pi r^2 h = pi * 1.75^2 * 7 = 67.35 in^3 the volume of a cup is 14.44 in^3 so the canister contains 67.35/14.44 = 4.66 cups so a cup of crumbs weighs 15/4.66 = 3.2 ounces

math
You're planning on making 4 meatloafs for a party. You go to the store to buy breadcrumbs, and see they are sold by the canister. How many canisters do you need to buy? •How much breadcrumbs does the recipe call for? It calls for 1 1/4 cups of breadcrumbs. • How ...

LA plz help
Yes, "shown in his earlier novels" gives the answer away. Yes, the word "humor" pops up repeatedly.

GEOM B
yes, two triangles with base 7.8 and altitude 3 hmm area of one of the six triangles = (1/2)(15)(13) = 97.5 times 6 = 585

pre-algebra, math
total costs c(x)= 3,000 + 10 x i(x) = 50 x p(x) = i(x) - c(x) = (50-10)x - 3,000 = 40 x - 3,000 40(100) - 3,000 = 1,000 0 = 40 x - 3,000 x = 300/4 = 75

math
Which of these glasses contains more liquid? Glass A contains about twice as much as glass B Glass A contains about 20% more than glass B Glass A and B contain about the same amount Glass B contains about 20% more than glass A Glass B contains about twice as much as glass A

math
Out of 250 racers who started the marathon, 233 completed the race, 14 gave up, and 3 were disqualified. What percentage did not complete the marathon?

Science
A cave explorer is surveying the cave. He follows a passage 100m straight east, then 50m in the direction 30degree west of north, then 150m at 45degree west of south. After fourth unmeasured displacement he finds himself back where he started. Whats the fourth displacement? In...

ELA
A