Wednesday
July 30, 2014

Posts by emily


Total # Posts: 2,300

Calculus
A University of Rochester student decided to depart from Earth after his graduation to find work on Mars. Before building a shuttle, he conducted careful calculations. A model for the velocity of the shuttle, from liftoff at t = 0 s until the solid rocket boosters were jettiso...

Physics
A convex lens of focal length 2.5 cm is placed 4 cm from a small object of height 4 cm. Use a ruler and construct the image. Is the image real or virtual, upright or inverted? What is the image distance? What is the height of the image? What is the magnification?

landmarks
none of those tell me who named palace of fine arts

landmarks
ther are so many websites , i do not know which website do you want me to read about

landmarks
i dont get it

landmarks
how did Palace Of Fine Arts got its name

Find the avg rate
Find the average rate of change f(x)=x^3-3x+9 (a) from -4 to -3 (b) from -2 to 5 (c) from 5 to 9

Algebra
For the given equation, list the intercepts and test for symmetry. 2+y-121=0 Show tests algebraically

math
he should be puling with 66 pounds of force

Please Help! Rate of change...
Taxes: Along with incomes, peoples charitable contributions have steadily increased over the past few years. The table shows the average deduction for charitable contributions reported on individual income tax returns for the period 2007 to 2012. Find the average rate of chang...

Math
Mack needs to buy fencing to surround his circular garden. If his garden is 30 feet across and fencing cost $4.50 per foot, how much will it cost to fence in Mark's garden? If the radius if of a circle is 4 feet, what is its circumference ? Ben ran 10 times around a circul...

Find the rate of change
Taxes: Along with incomes, peoples charitable contributions have steadily increased over the past few years. The table shows the average deduction for charitable contributions reported on individual income tax returns for the period 2007 to 2012. Find the average rate of chang...

Math
A meteoroid changed velocity from 1.0 km/s to 1.8 km/s in 0.03 seconds. What is the acceleration of the meteoroid?

Science
In 0.5 seconds, a projectile goes from 0 to 300m/s. what is the acceleration of the projectile?

Algebra 1
Solve for y=x-5

math
Let 2^a = 5 and 2^b = 7. Using exponent rules, solve the equation in terms of a and b. 0.4^x = 343

Math
Thanks!

Math
What is 8/9 as a percent, as a decimal, and a decimal rounded to two places?

Physics
no its still just wrong

Physics
That is wrong

Physics
A rotating uniform-density disk of radius 0.6 m is mounted in the vertical plane. The axle is held up by supports that are not shown, and the disk is free to rotate on the nearly frictionless axle. The disk has mass 5.8 kg. A lump of clay with mass 0.5 kg falls and sticks to ...

Physics
11-098-satellite_and_junk.jpg A spherical satellite of radius 4.6 m and mass M = 195 kg is originally moving with velocity vsatellite,i = < 3000, 0, 0 > m/s, and is originally rotating with an angular speed ?1 = 2 radians/second, in the direction shown in the diagram. A ...

Physics
A device consists of eight balls each of mass 0.4 kg attached to the ends of low-mass spokes of length 1.8 m, so the radius of rotation of the balls is 0.9 m. The device is mounted in the vertical plane. The axle is held up by supports that are not shown, and the wheel is fre...

CHEM QUICK HELP
Which of the following are correct statements? (Could be as many as 4) 1. Standard pressure is 101.3 atmospheres 2. One mole of gas contains 22.4 representative particles 3. One mole of gas always occupies 22.4 liters regardless of other conditions 4. Solids can always be grea...

math
Thank you!

math
Dad baked a batch of cookies. My brother ate half my mom ate a fourth of the batch. Dad ate 3 and I ate the last two. How many cookie did dad bake? PLEASE help me figure this problem out?

math
A population of animals oscillates between a low of 1098 on January 1 (t = 0) and a high of 2344 on July 1 (t = 6). (a) Find a formula for the population, P, in terms of the time, t, in months.

Physics
A car has a unibody-type frame and is supported by four suspension springs, each with a force constant of 36100 N/m. The combined mass of the car’s frame and everything inside it (the engine, the seats, the passengers, etc.) is 1270 kg. Because of worn-out shockabsorbers,...

Physics
A particle hangs from a spring and oscillates with a period of 0.2 s.If the mass-spring system remained at rest, by how much would the mass stretch it from its normal equilibrium position? The acceleration of gravity is 9.8 m/s^2

Physics
A mass of 0.22 kg is attached to a spring and is set into vibration with a period of 0.10 s. What is the spring constant of the spring? Answer in units of N/m

General Chemistry
What volume of 1.0 M HCl would react completely with 0.20 grams of NaC2H3O2*3H2O? It sounds like an equation I would set up as this and would use mole ratios to calculate the answer: HCl + NaC2H3O2*3H2O --> But I am confused as to what I would put as the products, let alone...

Chmeistry
Estimate the uncertainty in the speed of an oxygen molecule if its position is known to be +/- 3 nm. The mass of an oxygen molecule is 5.31 x 10^26 kg.

General Chemistry
Balance the following redox reaction in acidic and basic solutions: Fe(OH)2(s) + O2(g) --> Fe(OH)3(s) These are the steps my instructor gave us to balance redox reactions: 1. Divide into 1/2 rxns (reduction & oxidation) 2. Balance atoms other than H & O 3. Balance O with H2...

Physics 1
A coin rests 12.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface is 0.350. The turntable starts from rest at t = 0 and rotates with a constant angular acceleration of 0.749 rad/s2. After what period of time will the...

language arts
it is a spring break pratice book

language arts
but i need help i am only in third grade

language arts
true or false. 1. it is easy to walk across something impassable. 2. ice sheets floating on water are called floes. 3. land that is barren has many plants and animals. 4. a crevasse is a deep crack.

english
Special education services for young children are with disabilities a. cannot be enforced through laws b. depend on parent efforts c. do not involve the head Start program d. are rooted in federal legislation My answer is d.

math
You are at the music store to buy some CDs. You have $45 to spend and the store sells CDs for 12.99 each. Write an inequality that represents the number, n, of CDs that you can buy without spending more money than you have. help greatly appreciated thk

geography
The OB river flows through which region a. Central Asia b. Siberia c. Moldova d. Ukraine a or b not sure I think B is more correct am i right?

Science
Calculate the quantity of energy required to change 3.00 mol of liquid water to steam at 100°C. The molar heat of vaporization of water is 40.6 kj/mol

Biology { PLEASE HELP :D }
From an ATP production viewpoint, use fact B to make a statement regarding the efficiency of fats vs. carbs. Fact b - Carbs bind and store water. The metabolism of water yields no ATP. Fat has no water bound to it.

organic chemistry
Did a grignard experiment where we were supposed to form triphenylmethanol but something went wrong. When we heated up the mixture with the petroleum ether, it didn't solidify, it turned dark and oily. What went wrong?

organic chem
I prepared triphenylmethanol by a grignard reaction. At the end you add petroleum ether to the mixture and heat it up. It stayed a liquid and got dark and oily but never solidified. What went wrong?

Stats
Is noise present in the differenced series (taking non-stationary data and making it stationary thru first difference of a time series)?

language arts
thank you

language arts
what is the past tense of go

language arts
i get it now

language arts
i do not get it

language arts
what is the exact verb of swam

Curriculum dev
Behavior objectives should be written about a behavior that a) is exhibited by most chlldren. B) can actually be seen. C) exhibits all five selves. D) can be evaluated using standardized test. I think a) is exhibited by most children. CAn someone give me some feedback

Math
Find the difference between the perimeter of a square of area 1 centimeter square and the circumference of a circle of the same area.

Math
A lorry travels at 50km/h. Given that the diameter of its wheel is 88cm, find how many revolutions per minute the wheel is turning. Given your answer to the nearest whole number.

Math
Find the speed of a point on the rim of a 24cm diameter fly wheel which is turning at 2800 revolutions per minute. Give your answer in meters per second.

Math
If the minute hand of a big clock is 1.12m long, find the rate at which its tip is moving in centimeters per minute.

Math
As many 8cm diameter discs as possible are cut from a sheet of rectangular cardboard measuring 170cm by 90cm. Find the area of the sheet that is left.

Physics
That is why I'm asking. If u don't know, then don't answer my question

Physics
How can we find the resultant force if the mass and SPEED are given?? Give me the formula please!!

Statistics
The eggs of a species of bird have an average diameter of 23 mm and an SD of 0.45 mm. The weights of the chicks that hatch from these eggs have an average of 6 grams and an SD of 0.5 grams. The correlation between the two variables is 0.75 and the scatter diagram is roughly fo...

Statistics
A quiz consists of 10 multiple choice questions. Each question is marked either “right” or “wrong.” Each right answer gets 5 points, and 1 point is taken off for each wrong answer. The correlation between the number of right answers and the number of wrong ...

Physics 1
An astronaut in her space suit has a total mass of m1 = 76.9 kg, including suit and oxygen tank. Her tether line loses its attachment to her spacecraft while she's on a spacewalk. Initially at rest with respect to her spacecraft, she throws her oxygen tank of mass m2 = 12....

Math
The cost C in dollars of producing n yearbooks is represented by the equation C=1000+5n How much would it cost to produce 75n yearbooks?

biology
what is deep time?

Bioprocessing
A continuously operated 1000 liter CSTR is used for production of biomass from glucose provided by the feed (feed rate of 100l/h and glucose concentration of 10 g/l). The bacteria show Monod type growth with a maximal specific growth rate of 0.4/h and an affinity towards gluco...

algebra
Scientists can determine the age of ancient objects by a method called radio carbon dating. The bombardment of the upper atmosphere by cosmic rays converts nitrogen to a radioactive isotope 14C of carbon with a half-life of about 5710 years. Vegetation absorbs carbon dioxide t...

Chemistry
Why is why is CH4+2O2 --> CO2+2H2O very slow at room temperature?

math
9.0

7th Math
30, 2

Science
How do you balance this equation? Fe2O3+C=Fe+CO2

math
I am not understanding this question. Can someone help me please? Decide whether the experiment is a binomial experiment. If it is not, explain why. Selecting five cards, one at a time without replacement, from a standard deck of cards. The random variable is the number of red...

physics
A 30.343 V emf is placed across a series combination of three resistors (10 Ω, 15.632 Ω, and 64 Ω). At what rate is heat generated in the 15.632 Ω resistor? Answer in units of W

ENGLISH
AWESOME...no one ever told me how to check via the method you mentioned above...that helped me out ALOT!! I got it now :)

ENGLISH
need help with nominative and objective CASE PRONOUNS. these are the ones confusing me... THE POSTAL WORKER DELIVERED A PACKAGE FOR HARRY AND SHE/HER. MY GRANDFATHER AND HER/SHE OPERATED A SMALL INN IN VERMONT. THE COACH PRAISED MANUEL AND HE/HIM. WE'VE BEEN WAITING FOR YO...

phisics
what is the height of the ball if the bottom of the swing is zero, speed is 2.8m/sec, 9.81 acceleration of gravity

math
Dont know

Math
A man was given $x. He spent 50 cents a day. How much money had he left after A) 10 days? B) 2 weeks? C) t days?

Math
A father is three times as old as his son. In 13 years' time, the father will only be twice as old as his son. Find their present ages. (Please show the solutions clearly)

Math
Ahmad is 7 years older than Bala. Four years ago, Ahmad was twice as old as Bala. Find the sum of their ages in 7 years' time.

Math
Please show the solutions! 1.) x+y-2(2x-3y) 2.) x+y/2 - 3x-y/4 + x-5y/8 3.) 4x- {3x-[(x-3)-2(x-5)]} 4.) a+5b/2 + a-3b/3 - 5(a-b)/6 5.) 2x-5=3x-9 6.) 3x-(2x-7)=2x+3 7.) 7x+2/6 - x-4/3 = x+3/3 8.) 3x-2(x-3)+3(5-2x) 9.) x+1/3 - x-2/4 - x/6 10) 5(2x-5)=3(2x-11) 11) 0.5x+3=1.2x+5.8

English 11
You did not answer my question. Please help me find the rhetorical devices found within the given essay and elaborate. Thank you.

English 11
What are three dominant rhetorical devices in the essay "Where the World Began" by Margaret Laurence?

Biology
Carbon Dioxide

Science
Also, would "What are some stories that is related to the mystery of the Bermuda Triangle?" be a good research question?

Science
How about this one: What are some natural explanations that may have caused disappearances?

Science
I am doing a research project on The Bermuda Triangle. I need to answer three questions but I cannot think of any good research questions for The Bermuda Triangle, any ideas? Thanks!

calculus
If f(x) = 3x^(ln(x)), find f'(10)

calculus
Let f(x) = 2ln(cosx), find f''(x)

Calculus
Find the derivative of y = (ln(2x))/2x

Calculus
Find the derivative of y = (ln(3x))^4

Calculus
Solve for x in the equation ln(16-12x)-2lnx = ln4

Calculus
Solve for x in the equation ln(16-12x)-2lnx)= ln4

calculus
Calculate g'(36^(1/2)), where g is the inverse of f(x) = ((x*x)+16x) for x less than or equal to -16

Algebra
There are 21 people. The number of adults is 3 fewer than 5 times the number of children. How many adults are there? How many kids are there?

physics
Part A, use the following equations: d= vt and x=v(i)t+(1/2)at^2

physics
A charge moves a distance of 1.4 cm in the direction of a uniform electric field having a magnitude of 244 N/C. The electrical potential energy of the charge decreases by 108.3 × 10−19 J as it moves. Find the magnitude of the charge on the moving particle. The elec...

physics
A positive test charge of 8.33 × 10−5 C is placed in an electric field of 53.54 N/C intensity. What is the strength of the force exerted on the test charge? Answer in units of N

Algebra
A ladder reaches a height of 16 feet on a wall. If the bottom of the ladder is placed 4 feet away from the wall, what is the slope of the ladde as a positive number?

math
u have 15 white tiles. if u add some black tiles so that 3 out of 4 tiles are white, how many black tiles will u need?

physics
A 1500.0 kg car accelerates uniformly to double its speed from 35.9 km/h in 4.74 s. What net force acted on this car?

English
L The model airplane in my brother's room was made in Germany. Does in my brother's room describe the airplane?

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