Wednesday
December 17, 2014

Posts by emily


Total # Posts: 2,377

Chemistry
Hydrogen cyanide is a highly poisonous, volatile liquid. It can be prepared by the following reaction. CH4(g) + NH3(g) → HCN(g) + 3 H2(g) What is the heat of reaction at constant pressure? Use the following thermochemical equations. N2(g) + 3 H2(g) → 2 NH3(g) Δ...
October 31, 2010

Math
An auditorium has 50 rows of seats. The first row has 20 seats, the second row has 21, the third row has 22 seats, and so on, each row having one more seat than the previous row. How many seats are there all together? a. write 2 different expressions for the total number of ...
October 29, 2010

trig
If a=8, the angle C=50 degrees and the angle A=35 degrees find the other angle B and the remaining b and c sides. Give your answer to at least 3 decimal places.
October 29, 2010

physics
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?
October 29, 2010

physics
With acceleration of 2500 m/s2, how long will it take to rreach speed of light
October 29, 2010

physics
With acceleration of 2500 m/s2, how long will it take to rreach speed of light
October 28, 2010

English
Thank you so much. I think I get it!
October 28, 2010

English
Zoo keepers harvest bamboo for Pandas harvest = transitive? In China people eat the tender shoots as a vegetable. eat = transitive?
October 28, 2010

English
last two, I think I am getting it... Zoo keepers harvest bamboo for Pandas harvest = transitive? In China people eat the tender shoots as a vegetable. eat = intransitive?
October 28, 2010

English
Asian farmers live in bamboo houses? live = intransitive? Their sandals are made from bamboo strips. made = intransitive? Peoples sometimes sleep on bamboo mats. sleep = intransitive? In some countries, bamboo cages hold animals. hold = transitive?
October 28, 2010

English
Asian farmers live in bamboo houses? live = transitive? Their sandals are made from bamboo strips. made = transitive? Peoples sometimes sleep on bamboo mats. sleep = transitive? In some countries, bamboo cages hold animals. hold = transitive?
October 28, 2010

English
The Size might suprise you. suprise = transitive Some reach a height of 120 feet. reach = transitive The Japanese also make flutes from these stems. make - transitive
October 28, 2010

English
I am trying to figure out transitive or intransitive.... It is related to wheat, oats and barley. related = intransitive? The stems measure a foot in diameter. measures - transitive? Engineers strengthen concrete with it. Intransitive?
October 28, 2010

Chemistry
What is the temperature (in kelvins) at which 0.0260 mol occupies 1.00 L at 0.563 atm?
October 27, 2010

Biology
also located on the X chromosome is a gene that codes for deafness. This gene is recessive. a black female cat that is heterozygous for deafness (Dd) is crossed with a yellow cat that is not deaf What is the Punnet Square . and must use two letters on the x chromosome
October 27, 2010

algebra
what does x equal in this equation?1/2+7x/10=13/20
October 27, 2010

Biology
Thanks
October 27, 2010

Biology
Why do we perform aerobic respiration when we're resting and both aerobic and anaerobic respiration while we're running?
October 27, 2010

math
A low ha this paper sux ):
October 27, 2010

math
352$ for mae assurian and sally got $4.44 cents for 148 newspapers.
October 26, 2010

Applied statistics for business and economics
I apologize, 3 of the above answers are not correct. * a. 0.0498 * b. 0.0000 c. correct * d. 0.0038 e. correct f. correct
October 24, 2010

Applied statistics for business and economics
a. 0.9998 b. 0.0002 c. 0.0504 d. 0.0224 e. 3 cards f. 1.731877594 (rounded 1.7319)
October 24, 2010

Math
Thank you!
October 22, 2010

Math
For what values of k does the function f(x)=(k+1)x^2+2kx+k-1 have no zeros? One zero? Two zeros?
October 22, 2010

Physics
average acceleration in m/s squared
October 21, 2010

Physics
A sports car accelerates from rest to 89 km/h in 6.1s . What is its average acceleration in
October 21, 2010

Physics
A sports car accelerates from rest to 89 km/h in 6.1s . What is its average acceleration in
October 21, 2010

Physics
If you are driving 100km/h along a straight road and you look to the side for 1.9s , how far do you travel during this inattentive period?
October 21, 2010

physics
If you are driving 100 along a straight road and you look to the side for 1.9 , how far do you travel during this inattentive period?
October 21, 2010

Math
Determine the domain and range of f(x)=-sqrt(x+3) and the equation of the inverse.
October 21, 2010

Math
If f(x)=x^2-6x+14 and g(x)=-x^2-20x-k, determine the value of k so that there is exactly one point of intersection between the two parabolas.
October 21, 2010

Biology
What does the net movement of solutes/solvents during osmosis and diffusion mean?
October 20, 2010

chemistry
A coal burning plant that burns 4 metric tons of coal containing 2% sulfur (S) requires 1 metric ton of wet limestone (calcium carbonate) to remove 90% of the sulfur. The process prevents most of the sulfur from being emitted as sulfur dioxide to the air by producing calcium ...
October 20, 2010

chemistry
A coal burning plant that burns 4 metric tons of coal containing 2% sulfur (S) requires 1 metric ton of wet limestone (calcium carbonate) to remove 90% of the sulfur. The process prevents most of the sulfur from being emitted as sulfur dioxide to the air by producing calcium ...
October 20, 2010

physics
find the frictional force between an air hockey puck and the table, assume u air = 1.8 X 10^-5 kg/ms, the puck is 0.013 above the table, the puck has an area of 25 cm^2
October 19, 2010

chemistry
A coal burning plant that burns 4 metric tons of coal containing 2% sulfur (S) requires 1 metric ton of wet limestone (calcium carbonate) to remove 90% of the sulfur. The process prevents most of the sulfur from being emitted as sulfur dioxide to the air by producing calcium ...
October 19, 2010

chemistry
A coal burning plant that burns 4 metric tons of coal containing 2% sulfur (S) requires 1 metric ton of wet limestone (calcium carbonate) to remove 90% of the sulfur. The process prevents most of the sulfur from being emitted as sulfur dioxide to the air by producing calcium ...
October 19, 2010

precalc
find where f(x)<0 and f(x)>0 f(x)=xlnx-2x
October 18, 2010

Math
Given f(x)=7-2(x-1)^2, x>= 1, determine f inverse (5).
October 18, 2010

Math
Given f(x)=2x^2-1, determine the equation of the inverse.
October 18, 2010

Math
Given f(x)=7-2(x-1)^2, x>= 1, determine f inverse (5).
October 18, 2010

Chemistry
what is the wavelength of the photon emitted when an electron drops from a 4p orbital to a 2p orbital in a hydrogen atom
October 18, 2010

Biology
A cell has a salt concentration of 0.2 %. If it is placed into a solution with a salt concentration of 0.1 %. a) What change will occur to the salt concentration inside the cell? b)What change will occur to the water concentration inside the cell? c)What condition will ...
October 18, 2010

Economics
True or false: The US must remove tariffs and quotas to open trade with foreign countries. Consider the following issues: The definition of tariffs and quotas. The strength of the dollar on domestic and global economies. Benefits from tariffs or quotas, including examples. ...
October 18, 2010

Chemistry
Given a 2.5 kg solution of phosphoric acid and water (56 % phophoric acid, by mass), calculate the number of moles of phosphoric acid.
October 18, 2010

Chem
I got 100125 is that correct?
October 17, 2010

Chem
The specific heat capacity of aluminum is .89 J/y degrees C. How much heat is required to change the temp of 1500g aluminum pan from 25 degrees C to 100 degrees C?
October 17, 2010

Chem
The specific heat capacity of aluminum is .89 J/y degrees C. How much heat is required to change the temp of 1500g aluminum pan from 25 degrees C to 100 degrees C?
October 17, 2010

calculus
Find the equation of a cubic function that gives you the surface area of the cans given a set volume. The set volume is 300ml
October 17, 2010

History
yes
October 17, 2010

Photography
What's the difference between the setting of the enlarger height and focusing the image? Aren't both of the dealing with the light that shines onto the baseboard?
October 17, 2010

Math
What does it mean by: Show that the "value of 3x^2-6x+5" cannot be less than 1. ?
October 15, 2010

Physics
Oh! thanks! I understand it now :D
October 15, 2010

Physics
So it's 20 x 0.8=16?
October 15, 2010

Physics
A certain force made a 5.0 kg mass accelerate at 4.0 m/s^2. This same force made another object accelerate at only 0.8 m/s^2. Find the mass of the second object. I have no idea how to do this. Do i use m=1/a? What do i do?
October 15, 2010

Physics- Newton's 1st and 2nd Law
Thank you so much for the help!!
October 14, 2010

Physics- Newton's 1st and 2nd Law
Please help me :( Briefly explain the following scenario's using Newton's first law. a) Trevor wants to tow Kevin's car with his truck. He attached a small tow rope between the vehicles and leaves the rope slack (loose). Trevor quickly accelerates forwards making ...
October 14, 2010

Math
What are the vertical and horizontal stretch/compressions for the functions h(x)=1/(5x) and k(x)=|0.4x| ?
October 11, 2010

physics
A car drives straight off the edge of a cliff that is 56 m high. The police at the scene of the accident note that the point of impact is 129 m from the base of the cliff. How fast was the car traveling when it went over the cliff?
October 11, 2010

Physics
I understand the mass should be divided by the density for the required volume. I dont think that I am using the correct numbers. I came up with a volume of 172800 or 1.7 x 10^5 but the answer is incorrect. Can you please help?!! I did (1000V)(10)(500) = 1.7x 10^5
October 11, 2010

Physics
where would I use the 9.8m/s^2? And the density is which number?
October 11, 2010

Physics
To store the energy produced in 1.5 hour by a 160 MW (160 10^6 W) electric-power plant, how many cubic meters of water will have to be pumped from the lower to the upper reservoir? Assume the upper reservoir is 500 m above the lower and we can neglect the small change in ...
October 11, 2010

Math
A 5 m stepladder propped against a classroom wall forms an angle of 30 degree with the wall. Exactly how far is the top of the ladder from the floor? Express your answer in radical form. What assumption did you make?
October 10, 2010

math
find a function y=ax^2+bx+c whose graph has an x-intercept of 1, a y-intercept of -2, and a tangent line with slope -1 at the y-intercept.
October 9, 2010

Math
Given any right triangle with an acute angle theta, a) Explain why csc theta is always greater than or equal to 1 b) Explain why cos theta is always less than or equal to 1
October 8, 2010

hist
who were the pilgrims and what did they believe?
October 8, 2010

algebra
A brick border that is x feet wide is built around a rectangular patio. The patio is 6 feet wide and 8 feet long. The combined area of the patio and the brick border is 120 square feet. What is the width of the brick border?
October 7, 2010

algebra
If the area of a square is 9x2-12xy+4y2, what is the perimeter of the square in terms of x and y. *its 9x squared and 4y squared i have several problems like this on my homework if you show me how to do this one im sure i could figure out the rest
October 6, 2010

algebra
Elliot is 5 times as old as Sid. Ten years from now, Elliot will be at least 3 times as old as Sid will be then. At least how old is each person now?
October 6, 2010

Physics
You are driving to the grocery store at 14.8 m/s. You are 140.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.440 s and that your car brakes with constant acceleration. You are 133 m from the intersection when you begin to apply ...
October 6, 2010

3rd grade
200
October 6, 2010

Physics
i do not think that is correct because i am getting the incorrect answer.
October 6, 2010

Physics
You are driving to the grocery store at 14.8 m/s. You are 140.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.440 s and that your car brakes with constant acceleration. You are 133 m from the intersection when you begin to apply ...
October 6, 2010

Physics
You are driving to the grocery store at 14.8 m/s. You are 140.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.440 s and that your car brakes with constant acceleration. You are 133 m from the intersection when you begin to apply ...
October 6, 2010

Physics
A speedboat starts from rest and accelerates at +2.07 m/s2 for 7.00 s. At the end of this time, the boat continues for an additional 6.00 s with an acceleration of +0.523 m/s2. Following this, the boat accelerates at -1.55 m/s2 for 8.00 s. What is the velocity of the boat at t...
October 6, 2010

Physics
nope :(
October 5, 2010

Physics
kk got that. did you get number 18?
October 5, 2010

Physics
okay ! and which q'n did u get 255 m for?
October 5, 2010

Physics
k i got this one.. find the t it takes for each runner using t=d/v....then subtract the times, and you have the answer !
October 5, 2010

Physics
A speedboat starts from rest and accelerates at +2.07 m/s2 for 7.00 s. At the end of this time, the boat continues for an additional 6.00 s with an acceleration of +0.523 m/s2. Following this, the boat accelerates at -1.55 m/s2 for 8.00 s. What is the velocity of the boat at t...
October 5, 2010

Physics
You are driving to the grocery store at 14.8 m/s. You are 140.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.440 s and that your car brakes with constant acceleration. How far are you from the intersection when you begin to apply...
October 5, 2010

Physics
alrighttyy. did u get number 13, 14 or 18?
October 5, 2010

Physics
okay thanks ! was your velocity really small and negative then?
October 5, 2010

Physics
okay but what does 'u' refer to? Also, for question #7, how did you figure out the total velocity for the entire trip?
October 5, 2010

Physics
oh okay i got that ! thanks. for the second part..how long it takes to reach the bottom.. do u use t = d/v?
October 5, 2010

Physics
yes. but how did you get it because i have different numbers
October 5, 2010

Physics
I have this same question.. got it wrong
October 5, 2010

Science
thks
October 5, 2010

Science
What is a experimental investigation? What is a descriptive investigation?
October 5, 2010

Physics
Superwoman is hovering above the ground when a person free-falling goes by her at a terminal velocity of 140 km/h. Unfortunately, the parachute does not open. Fortunately, Superwoman is around. If it takes her 1.9 s to realize the person is in distress, what must her ...
October 3, 2010

Biology
How does a plant growth regulator differ from a plant growth hormone?
October 3, 2010

AP world history
i have to write a DBQ promt question for the interaction between humans and the enviornment (demography and disease, migration,technology, and patterns of settlement) about roman empire
October 3, 2010

Physics
Two rugby players are running towards each other. They are 37 m apart. If one is accelerating from rest at 0.5 m/s^2 and the other was already moving at 3.1 m/s and maintains her speed, a)how long before they crunch together? b)How fast was the accelerating player going? c)How...
October 2, 2010

Physics
A police car stopped at a set of lights has a speeder pass it at 100 km/h. If the police car can accelerate at 3.6 m/s^2, how long does it take to catch the speeder?
October 2, 2010

7th grade
5x-10-2x+7=0 3x-3=0 3x=3 x=1
October 1, 2010

Physics
Thanks!
October 1, 2010

Physics
On a velocity-time graph of a person's walk, if a person is slowing down in the positive direction, then acceleration is in the negative direction.For example, the positive direction is [E]. If a person's acceleration is -1m/s^2, then it is 1 m/s^2 [West]. But that ...
October 1, 2010

Math
How did u get the answer?
October 1, 2010

Math
Ali did his homework at school with a graphing calculator. He determined that the equation of the line of best fit for some data was y=2.63x-1.29. Once he got home, he realized he had mixed up the independent and dependent variables. Write the correct equation for the relation...
October 1, 2010

Math
If f(x)=x^2, what is the domain and range of y=0.5f(3(x-4))-1?
September 30, 2010

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