Wednesday
April 23, 2014

Posts by Lacey


Total # Posts: 120

english 11
In which sentence is the underlined phrase a prepositional phrase functioning as an adjective? My sister was born in Chicago. She went to boarding school in Coventry. My sister moved away in 2009. Her grades gave my sister a place in the top rank of her class. 7. Read the sent...

english 11
In which sentence is the underlined phrase a prepositional phrase functioning as an adjective? My sister was born in Chicago. She went to boarding school in Coventry. My sister moved away in 2009. Her grades gave my sister a place in the top rank of her class. 7. Read the sent...

chemistry
what is a catalyst

physics
What is the kinetic energy of each electron in a beam of electrons if the beam produces a diffraction pattern of a crystal which is similar to that of a beam of 1.00 eV neutrons? Note: The electron mass is 9.11 × 10–31kg; and the neutron mass is 1.67 × 10–...

math
convert 2.37 with a reoccurring 37 into a decimal

Ap chemistry
What is the approximate molar fraction of ethanol c2h5oh in an aqueous solution in which the ethanol concentration is 11.0 molal? A. 0.0011 B. 0.011 C. 0.170 D. 0.200 E. 0.600

7th grade math
sorry i havent learned this

Physics
a 60 kg boy on a sled reaches the bottom of a hill traveling at 8 m/s, if he comes to a stop at 20 m along this flat stretch of snow what is the coefficient of kinetic friction between the sled and the ground? (hint: find the acceleration first)

Physics
A glass is slid across a bar top and eventually comes to rest. if the coefficient of friction between the glass and bar top is .32 what is the acceleration it experiences?

Physics
What force of friction would be felt between a 5 kg sled and the ground if a 20 N force is needed to cause it to accelerate at a rate of 1.3 m/s squared?

Physics
A volleyball player serves the ball horizontally with a speed of 23.8 m/s. How far will it have dropped when it reaches a distance 9.1 m

AP Chemistry
If a metal ore contains 21.4% pure metal, how many pounds of pure metal can be obtained from 59 pounds of metal ore? Answer in units of pounds

AP Chemistry
I got 100.276. Do i divide that by 172?

AP Chemistry
14 carat gold has a purity of 58.3%. How many moles of gold are in 172 grams of 14 carat gold? Answer in units of moles

AP Chemistry
For the reaction ? N2H4+? O2 →? N2+? H2O , what is the maximum amount of N2 (28.0134 g/mol) which could be formed from 14.75 g of N2H4 (32.0452 g/mol) and 4.31 g of O2 (31.9988 g/mol)? Answer in units of g

AP Chemistry
When 0.055 moles of lead(II) nitrate are dissolved in enough water to make 803 mililiters of solution, what is the molar concentration of nitrate ions? Answer in units of M.

MATH
I don't know but i need help with the same question!!!....... A company sells cardboard that is 9 1/8 mm thick. Write an equation to solve for the number of sheets of cardboard, c, in a pile that is 255 1/2 mm thick. What must be done to both sides to solve the equation?

English
A B B A

Chem 2 Lab
Calculate the volume of a 0.150 M NaOH solution that will be required to neutralize all of the H+ ions in 0.400 grams of phosphoric acid?

Biology
Both, because of the reduction of nitrate to nitrogen gas makes it biological and chemical.

Science
On the second question kidneys secrete H+ ions when the pH becomes too low in the blood so the blood won't become too alkaline.

Chemistry
Consider the reaction CH4+ 2Cl2=CCl4. If .33 moles of CH4 is reacted with 1 mole of Cl2, how much CCl4 is produced?

chemistry
but how do i balcane the charges? i don't understand what to do with them. i know i am supposed to bring them down, but down where?

chemistry
How do you balance a chemical reaction word equation?!

geometry
1. A triangle has side lengths of 8, 10, and 12. what kind of triangle is it? 2. A triangle has side lengths of 3, 4, and 7. what kind of triangke is it?

Algebra
A box contains 15 blue marbles, 25 yellow marbles, 20 green marbles and 40 red marbles. How many ,arbles must you select to be sure that a green marble has been chosen ?

Algebra 2
Write a system of inequalities in which x and y are each greater than -3, but not greater than 2. Can someone please help???

Math
thank you so much!!!!!!!

Math
two cones have radii in the ratio 5:4 and height 2:3, determine the ratio of their volumes . where V=1/3pier^2h

civics
what is a good strategy for remembering 2 paragraphs of the constitution?

math
First, you have to change miles into feet. There are 5,280 feet in 1 mile. Next, you need to multiply 5,280 feet by 26 miles, to see how many feet are in 26 miles. The answer is 137,280. The last step is to divide 5,280 feet by 137,280 feet. This gives you roughly .0385 feet.

Stats
An instructor gives a test with 20 multiple choice questions. There are 4 responses per questions and only one choice correct. The test also has 30 True/False questions. Determine the probability a student randomly guessing on all questions and correctly answering no more than...

Grammer
2. I should of written down where(were) I last put them. 3.I don't want to(too) buy that. It's to expensive

Grammer
2. I (should’ve) written down where i last put them. 3 is correct 4. A evening out can be a great way to clear one's mind.

Grammer
4.A evening out can be a great way to clear one's mind.

Grammer
2. I should of written(wrote) down where I last put them. 3.I don't(do not) want to buy that. It's to expensive number 4 is correct

Grammer
Can you help me with these sentences.Review the following sentences. Some of them are correct, whereas others contain an error with a commonly confused word. 1.The diplomats are doing what they can to restore peace. 2.I should of written down where I last put them. 3.I don...

Science
On a day with an air temperature of 75°F, you read the psychrometer and determine the relative humidity to be 74%. A sudden weather change (that does not affect the actual moisture content of the air) reduces the relative humidity to 70%. What was the temperature change?

Intermediate Algebra
I have a 72% in this class, but I think I made an F on my final, what is my final grade? please help me!!!

algebra
Describe the steps to graph the direct variation equation y = – 3x. In the formula d = rt, what do each of the letters stand for and how do they relate?

statistics
A random sample of 20 hogs on farmer Brown's hog farm had an average weight of 350 pounds and a SD of 70 pounds. Find 95% confidence interval estimate of the mean weight of all farmer Brown's pigs.

Physics
Ice (initially at 0 degrees celcius)is added to 0.75 L of tea at 20 degrees celcius to make the coldest possible iced tea. If enough ice is added so the final mixture is all liquid, how much liquid is in the pitcher when this condition occurs?

Cultural Diversity
what is the best way to enplain orientalism and the characteristics of it?

Physics
A solid ball of mass m rolls along a horizontal surface with a translational speed of v. What percent of its total kinetic energy is translational?

Math
50.

physics
A yo-yo of radius 10 cm and mass 1 kg is dropped from rest. What is the instantaneous torque on the yo-yo if I hold the string with my fingers?

PHYSICS ---HELP!
Consider a hoola-hoop of radius R and it is spinning about its symmetry axis at a constant angular velocity. Now, I double its mass and halve its angular velocity. What is the new angular momentum in terms of the initial angular momentum?

PHYSICS ---HELP!
I get something close to that.

PHYSICS ---HELP!
A 3.6 m diameter merry-go-round is rotating freely with an angular velocity of 0.78 rad/s. Its total moment of inertia is 1700 kg\m^2. Four people standing on the ground, each of mass 62 kg, suddenly step onto the edge of the merry-go-round. 1. What is the angular velocity of ...

Finance
Mary needs $9000 in 7 years. What amount can she deposit at the end of each quarter at 6% interest compounded quarterly so she will have her $9000?

physics
A small rubber wheel is used to drive a large pottery wheel, and they are mounted so that their circular edges touch. The small wheel has a radius of 1.7 cm and accelerates at the rate of 6.9 rad/s^2, and it is in contact with the pottery wheel (radius 27.0 cm) without slippin...

2nd time posting bc i still need HELP! PHYSICS!!!!
I had a problem similar to this but I was using -11.4 m/s and 1.35 s. You can use my calculations below and just plug in your numbers. Velocity of diver just before hitting the water,Vf = - 11.4 m/s Time, t = 1.35 s Velocity of diver before 1.35 s = Vi Vf = Vi - g t - 11.4 = V...

physics
A person jumps from the roof of a house 3.6 -m high. When he strikes the ground below, he bends his knees so that his torso decelerates over an approximate distance of 0.70 {\rm m}. If the mass of his torso (excluding legs) is 46 kg. Find the average force exerted on his torso...

physics/ math
I figured this out. For those that may need help with a question like this. Because of the North direction being the displacement vector... there was a 90 degree angle. So... (1.1)(cos90) = 0 (1.1)(sin90) = 1.1 Answer: (0, 1.1)

physics/ math
A student bikes to school by traveling first d_N = 1.10 {miles} north, then d_W = 0.500{miles} west, and finally d_S = 0.200 {miles} south. You will now find the same quantity algebraically, without the need to use much geometry. Take the north direction as the positive y dire...

Physics
A student bikes to school by traveling first d_N = 1.10 miles north, then d_W = 0.500 miles west, and finally d_S = 0.200 miles south. You will now find the same quantity algebraically, without the need to use much geometry. Take the north direction as the positive y direction...

Science
what mammal order has the following dental formula: 006/406?

history
Coolidge was known as a supporter of big business. what are three examples?

probability
This is wrong!! Spades are ace through K which is 13 plus the other 3 kings which is 16, not twelve.

chemistry
How many milliliters of .50 M NaOH solution are required to titrate 40.0 mL of a 0.10 M H2SO4 solution to an end joint?

math
x over x+2 and x=3

MATH
0

algebra
o Systems of equations can be solved by graphing or by using substitution or elimination. What are the pros and cons of each method? Which method do you like best? Why? o What circumstances would cause you to use a different method?

science
How does a sunflower's energy get transferred?

Ruminant Nutrition (college)
I'm studying for a Ruminant Nutrition final exam and have a couple essay questions that I'm really struggling with... - How do ruminants fit into sustainable food production systems? - Assume that you can genetically modify a rumen microbe to perform any reaction (e.g....

Probability
Two brothers enter a race with 5 others. Racers draw names to determine their starting positions (1 to 6). What's the probability that the older brother will start in lane 1 with his brother directly beside him?

logic
determine the validity of the next arguments by using Euler circles, then translate the statements into logical statements using the basic connectives, and using truth tables, determine the validity of the arguments. Compare your answers. (a) No A is B Some C is A Some C is no...

Chemistry
A 67gr mass of solid iron is heated by a flame until the temp of the iron equals the temp of the flame. The solid iron is then dropped into 250gr of liquid water at 26 degrees C. After 5 mins, the iron and the water are both at 47 degrees C. Specific heat: Iron- .451 Water- 4.184

science
what is the purpose of the ridge on the roof?

science
explain the importance of convection currents to pond life

Math - last one
yes, but why is it t/3?

Math - last one
I just have one more question. I need to find the equation for the following word problem: a group of yeasts cells grows by 75% every 3 hours. At 9 a.m., there are 200 yeast cells. Write an equation that models the number of yeast cells after 9 a.m. So far I've worked out ...

Math - I really need help, please.
oh, thank you so much!

Math - I really need help, please.
A town has a population of 8400 i 1990. Fifteen years later, it's population grew to 12500. Determine the average annual growth rate of this town's population. I really don't understand this problem. I've been going at it for hours and all I've come to is t...

Geometry
Please help solve for: solve for x: m < 2=70 and m < 8 = 6 x - 2

nonfiction
Why in the world would Mrs. Sue put incorrect answers on here? Mrs. Sue, I understand your beliefs in students doing their own work... but, that doesn't give you the right to sabotage a students grade. If you truely want to help, volunteer in a public school to students wh...

pre algebra
a rectangle measures 3.9 cm by 9.1 cm what is the area of the rectangle? (a=lw)

Geometry
Thanks so much!

Geometry
Find the value of the variable and ST if S is between R and T. RS=7a, ST=12a, RS=28 No clue what so ever how to do this.

Geometry
so...its lines, lines, and points?

Geometry
plane lines lines i think thats what they are..not sure

Geometry
VISUALIZATION Name the geometric term(s) for: a paritally-opened news paper woven threads in a piece of cloth satellite dish signal

Math
2/9

Geometry
nvm, i figured it out i think

Geometry
Name at least four ordered pairs for which the sum of coordinates is -2.

English
A thesis statement is a focused selection of text that can be anywhere from just one sentence to a few pages in size that clearly delineates the argument that will be taken in a proposed paper to be written. A thesis statement should be prepared in advance for all types of sci...

Chemistry
Homogeneous Mixtures: salty water Heterogeneous Mixtures: sandy water

Critical Thinking
A personal mission statement is a brief description of what you want to focus on, what you want to accomplish and who you want to become in a particular area of your life over the next one to three years. It is a way to focus your energy, actions, behaviors and decisions towar...

Physical science
the volume of gas is your dependent because it changes according to the temperature

math
how do you make a chart or a table?

AP Bio
FOOD CHAINS FOLLOW A SINGLE PATH AS ANIMALS EAT EACH OTHER. EXAMPLE: GRASS (is eaten by a) GRASSHOPPER (which is eaten by) a FROG (which is eaten by a) SNAKE (which is eaten by a) HAWK -------------- FOOD WEBS SHOW HOW MANY ANIMALS ARE INTERCONNECTED BY DIFFERENT PATHS. EXAMPL...

Algebra
u must be really really smart, u've answered most of ppls questions, including my own

Algebra
is it 70?

Physics
can scientific laws be changed by a vote?

Physics
Can scientists from other countries change what physicists in the United States think? Need help ASAP work due tomorrow XD

sci/275
lakes, rivers, glaciers

Solving for Variables
1. 2T^2 + 3KT - 3K = 2 (for T) 2. x^3-4x^2 + 6 = 0 (for x)

calculus
how do you find the dy/dx of the square root of x minus the square root of y equal to 10? You have to use implicit differentiation.

math
a punch recipe calls for 1 .5 liters of juice .how many millilitres is this

SAT Math... again
I asked two questions yesterday, and thankfully, bobpursley answered the latter. I accidentally typed in the first question wrong, so I'd really appreciate it if someone helps me out. Thank you, and have a good day :) 1. Kevin is 3 years younger than Nora. If n represents ...

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