Posts by allie

Total # Posts: 421

Physics
Clap your hands and estimate the energy and power released as sound waves. I know Kinetic energy= 1/2*m*v^2 and Power is KE/t but how do I find the velocity of the sound wave made from clapping my hands? and for the mass do I use the mass of my hands? thanks

mat
harvest cereal comes in boxes of different sizes.the regular box holds 7/8 pounds.the small box holds 2/3 as much. How much cereal does the small box hold?

physics
A skier of mass 72 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 65 m up a 30° slope (assumed frictionless) at a constant speed of 2.7 m/s? (b) What power must a motor have to perform this task?

chemistry
What is my theoretical yield of iron II chloride if I start with 34 grams of iron II bromide?

physics
Find the height from which you would have to drop a ball so that it would have a speed of 6.6 m/s just before it hits the ground.

physics
A projectile is launched with a speed of 41 m/s at an angle of 55° above the horizontal. Use conservation of energy to find the maximum height reached by the projectile during its flight.

physics
A sledge loaded with bricks has a total mass of 18.9 kg and is pulled at constant speed by a rope inclined at 19.3° above the horizontal. The sledge moves a distance of 19.8 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0...

physics
A child and sled with a combined mass of 50.0 kg slide down a frictionless slope. If the sled starts from rest and has a speed of 3.40 m/s at the bottom, what is the height of the hill?

physics
A daredevil on a motorcycle leaves the end of a ramp with a speed of 29.5 m/s as in the figure below. If his speed is 27.1 m/s when he reaches the peak of the path, what is the maximum height that he reaches? Ignore friction and air resistance.

heart
how long does it take to design, test, and get FDA approval of an artificial heart valve?

Relative Acidities
Rank the given compounds on their relative acidity. Here was the order I thought it was but it turned out to be wrong. (i based it based off of sp being most acidic and sp3 being least acidic) STRONGEST HC(triple bond)C-CH3 H2C=CH2 CH3NH2 H2O CH4--> WEAKEST and then I ...

ochem
list from strongest acid to weakest acid HC(triple bond)CCH3 H2C=CH2 H3CNH2 CH4 H2O i thought the order went HC(triple)CCH3 H3CNH2 H2O H2C=CH2 CH4 but it comes out as wrong and i don't know why >

Biology- DNA
What is needed to synthesize DNA? -a DNA strand -a primer and is that it?

Complex Numbers
Oh thank you so much i forgot that when you that the square root of a negative you get the complex #

Complex Numbers
How do I go about finding the solutions to the following x^2-6x+25=0 I know the answer is 3-4i and 3+4i however, I do not know how to go about finding the these solutions Thanks :)

Math
of the 43 presidents 15 were elected to 2 terms. what fraction of us presidents were elected two terms? HELP! I have been at this one for over two hours and I can't come up with the answer.

bio
according to Stephens, when are learning behaviors expected to evolve?

math
find the slope and y-intercept of the line in the given equation: y=6/7x-4

math
Thank you.

math
Given the linear equation y=-3/2x+1, find the y-coordinates of the points (-4), (-2), and (6). Please show all of your work. Plot those points and graph the linear equation.

bio
What is the grandmother effect in humans? what is the grandfather effect?

bio
what is the sociobiology controbersy?

Calculus
What's the practical domain and range of this volume function: 4x^3-39x^2+93.5x

math
solve v=(1/3)t+12

bio
what is prey flushing?

bio
what is the edge effect? (as part of group living)

science- chemistry
How much energy in kilojoules is needed to heat 5.00 g of ice from -10.0 C to 30.0 C ?

Spanish 1
Use the cues below to write sentences with the verb GUSTAR. MODELO: comida italiana/Vilma = A Vilma le gusta la comida italiana. 1) quien/los animales 3) quienes/la musica

Spanish 1
A spanish exchange student is trying to figure out what his friends like to eat. Provide the correct pronoun forms to complete his sentences below.: ____ gusta la comida china. A Patricia y a Juan ____ gusta la comida mexicana. ¿A vosotros ____ gusta la comida italian? ...

bio
what is an example of a naturally fragmented habitat, and a habitat that has been fragmented by human land use?

ecology
what is the atlantic pahtway? and why does its path through upstate New York raise special conservation concerns for woodlands and wetlands on the south side of Lake Ontario?

math
3a+8=15-(9a-9)

world history
I was wondering how to spell Ida Peeiffer I mean like this lady couldn't even find it on the internet how crazy is that.

math
Use Descarte's rule of signs to discuss the possibilities for the roots of the equation. Do not solve the equation -5r^(4)+6r^(3)+9r-15=0

math
Use the rational zero theorem, Descartes rule of signs, and the theorem on bounds as aids in finding all real and imaginary roots to the following equation: 4x^(3)-17x^(2)+16=0

math
solve the equation for all real and imaginary solutions (x-3/2)^2-2(x-3/2)+26=0

math
Find all real solutions: sqrt(x+10)+ sqrt(x-1)=11

chemistry
If the decomposition of 3.785 g iron (III) chloride yields 1.302 g iron and 2.483 g chlorine, how many grams of iron and chlorine are produced when 2.175 g iron (III) chloride decomposes?

Find the vertex for f(X)=-x^2+8x+6 I came up with (4,22)but i'm not sure. If so, what is the line of symmetry?

word problem
Thank you, Ms. Sue....I had the right concept but was stuck in the last part... Allie

Math word problem
The hypotenuse of a right triangle is 22 m long. The length of one leg is 10 m less than the other. Find the lengths of the legs. I have so far let one leg be x the other leg will be x-10 x^2 +(x-10)^2=22^2 x^2+x^2-20x+100=484

health
What are the ethicl considerations in obtaining a persons DNA?

Math, plz help
How do I write a quadratic equation having the given numbers as solutions of -9 and 3

Math
This question is in my FLVS test.... and i have NO idea. O_O"

Chemistry
The reaction below shows the corrosion process of iron. Calculate E°cell for the corrosion process and state whether you would predict that this is a spontaneous or nonspontaneous process. 2 Fe (s) + O2 (g) + 4 H+ (aq) → 2 Fe2+ (aq) + 2 H2O (l)

Chemistry
Calculate ΔG at 298 K for the electrochemical cell consisting of Au metal in a 0.00500 M Au(NO3)3 solution and Cu metal in a 0.950 M Cu(NO3)2 solution.

Critical Thinking 205
Thank you I didn't ask the question right. Which one of the 3 is the best?

Critical Thinking 205
which one of these make an argument the best? Which one of these is the weakest? Or how are the terms used in arguments? Here are the terms - Valid/ Invalid, -Sound/ Unsound, -Strong/ Weak

chemistry
how much heat dows a 23.0g ice cube absorb as its temp increases from -17.4deg C to 0.0deg C?

AP Chemistry
I came up with 6.67 x 10^-3 g solute/ 100g solvent. Based on the information in the problem, does this seem about right?

AP Chemistry
The question asked... Calculate the solubility of calcium sulfate in grams solute per 100 grams solvent. Assume that the volume occupied by the solute in the solution in negligibly small. I solved and got 4.9 x 10 ^-3 mol/L... how do I put this in grams solute per 100 grams ...

Math
Answer to question 2 about credit card debt in the US is RIGHT SKEWED.

Math
a ladder 10 ft long rests against a vertical wal. if the bottom of the ladder slides away from the wall at a rate of 0.7 ft/s, how fast&...

chemistry
Assume you are performing the calibration step of Experiment 8 and you begin with 50 g of water at 20 oC and 50 g of water at 80 oC. After adding the two portions of water into your calorimeter setup and following the procedure outlined in the experiment, you determine the ...

chemistry
The boiling point of diethyl ether CH3CH2OCH2CH3 is 34.500C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in diethyl ether is cholesterol . How many grams of cholesterol, C27H46O (386.6 g/mol), must be dissolved in 263.0 grams of diethyl ether to raise the ...

chemistry
The boiling point of diethyl ether CH3CH2OCH2CH3 is 34.500C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in diethyl ether is cholesterol . How many grams of cholesterol, C27H46O (386.6 g/mol), must be dissolved in 263.0 grams of diethyl ether to raise the ...

physics
A mass is hung from a beam of weight 2.0 N and length 81 cm. The tension and angle of the cable supporting the beam is 5.0 N at an angle of 40° from the horizontal. Using torques produced calculate the value of the unknown mass.

Chemistry
About twenty radioisotopes with ultra-long half-lives, from 82 million years (244- Plutonium) to 6 million billion years (50-Vanadium) are found in the earth’s crust, yet no radioisotopes with half-lives less than 70 million years (146- Samarium) are found. Why not? Use ...

chemistry
Assume that the aluminum atoms can be represented as spheres, as shown in the drawing (Part C figure) . If each Al atom has a radius of 1.43 angstroms, what is the length of a side of the unit cell?

Physics
2. Find Forces in Y direction to solve for m 18N*sin(28)+Fn*fs 18N*sin(28)+(15.9N*0.4)-9.8m=0 The above solution method is incorrect. I assume the intended 18N*sin(28)+(15.9N*0.4) / 9.8 = m. The forces in the y direction divided by the acceleration would net you 1.511274299 ...

History
After the Treaty of Paris, what policy changes did Britain make for the colonies?

math
Find the slope, x-intercept, and y-intercept for the line 9 x + 10 y + 16 = 0 I found y to be -1.6, the slope to be -.9 and x to be wither 0/9 or -16 but it said i got x wrong

science
a person who deals with the atmosphere and its phenomena, including weather and climate.

math
1. The equation, in general form, of the line that passes through the point (3,4) and is perpendicular to the line 5 x + 5 y + 9 = 0 is Ax + By + C = 0, where a=? b=? c=? 2.The equation of the line that goes through the points ( -9 ,-6 ) and ( -6 ,-3 ) can be written in ...

physics
omg i had the same question jason says your right he found the answer in the text book

Reimbursement Methodologies
You're the new director of a hospital health information management department. The chief financial officer has hired you for your expertise in health care reimbursement and needs to know how your department can help with reimburement. List the mot impotant functions of ...

brother is to mother as fly is to

write an email of 6-10 sentences based on the scenario described here. Your boss has asked you to set up a meeting with a client for next week thursday. He wants to meet at the Miami Beach resort on Collins ave. He is taking along an assistant manager to share his ideas for ...

math
810,000

Rounding (math)
780,000

algebra
Reduce to lowest terms 3x-6/x^2-4x+4 perform operation w^2-1/(w-1)2 times w-1/w^2+2w+1 Find LCD and convert rational express. to equivalent rat. exp. with LCD as the denominator: 4/a-6 , 5/6-a

social studies
how old was john adams when he first went to school a)4 b)5 c)6 d)7

social studies
ok this is the question jefferson believed that the creation of a national bank was a)unconstitutional b)faction c)democratic republicans d)federalist

social studies
how old was john adams when he first went to school

socal studies
what was hamilton and his supporters called

pre-calc
what does this simplify to: f(x)=x/(x+4)^(1/5)-2

pre-calc
how would you solve x^(5/2)(x^(1/2)- 1/x^(1/2))

pre-calc
how would you solve 3/(x+2) - 6/3x = 6/(3x+6) algebraically and graphically?

pre-calc
the sum of the two squares of two consecutive even integers is 1,648. what are the integers?

algebra math riddle...
few of them survived the branding

math
did Rene Descartes make any other contrbutions besides the coordinate grid

science
does DNAse cleave DNA at a steady rate (linear relationship) or is it some sort of exponential thing?

science
anyone??

science
wehat is the difference between RNA and DNA that allows them to be separated?

science data
What is the theory of differentials?

science data
What is the difference between an interpolated point and an extrapolated point? What assumption is interpolation and extrapolation based on? Which technique is more prone to error?

mathematics
What is the difference between an interpolated point and an extrapolated point? What assumption is interpolation and extrapolation based on? Which technique is more prone to error?

social studies
What are Inida's main products in India?

Chemistry
A sample of 25.00 mL of vinegar is titrated with a standard 1.02 M NaOH solution. It was found that a volume of 19.60 mL of the standard NaOH solution is used to completely neutralize the acetic acid in the solution. Calculate the concentration of the acetic acid solution.

Chemistry
A volume of 25.0 mL of 8.0 M acetic acid is diluted with sufficient water to prepare 1.00 liter of solution. What is the concentration of the diluted solution?

Chemistry
Calculate the amount (in grams) of AgNO3 needed to prepare 250.0 mL of 0.25 M of AgNO3.

Chemistry
Calculate the number of mol of NaOH in 25.5 mL of 1.08 M of NaOH.

Chemistry
The equation for respiration reaction is given by: C6H12O6 + 6O2 ------> 6CO2 + 6H2O + Energy Calculate the amount of water formed from oxidizing 18.0 grams of glucose in the presence of excess oxygen.

Chemistry
Antacid neutralizes stomach acid by the following reaction: Mg(OH)2 + 2HCl -----> MgCl2 + 2H2O Calculate the amount of Mg(OH)2 (in grams) needed to neutralize 2.5 grams of HCl.

To Kill A MockingBird
i know this is kind of late but an irony in the book is when Aunt Alexandra and her missionary circle are trying to help the "Mrunas". They are helping black people, but not helping the ones in their own town...

religion
What is JUdaisms followers?

Math
8u64

science
asymbiotic relationship in witch both organizms benifit

Chemistry
For each of the compounds below, exlain why they do not have the same value for their standard heat of vaporization. 1. Propane and propanone 2. Propanone and 1-propanol

math
what are the multipuls of 15

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