# 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?

**Math, I have partial answer..**

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 ...

**reading**

brother is to mother as fly is to

**Types of Business writing**

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