Saturday
September 20, 2014

Posts by emily


Total # Posts: 2,309

Science
A gas filled balloon having a volume of 3.0 L at 1.1 atmosphere of pressure and a temperature of 22 C is allowed to rise into the stratosphere where the temperature and pressure are: - 28 C (note the negative sign) and 0.002 atmospheres , respectively. What is the approximate ...
November 19, 2010

Calculus
The volume of a cone of a radius r and height h is given by V=(3.14/3)(r^2)(h). If the radius and the height both increase at a constant rate of .5 cm per second, at what rate, in cubic cm per second, is the volume increasing when the height is 9cm and the radius is 6cm.
November 18, 2010

Science
Is sugar a covalent or ionic compound?
November 16, 2010

Math
why do you let n=1, 2 and 3?
November 15, 2010

Math
How do you get the general term for a sequence that has increasing common differences? For example: 1,2,4,7,11
November 15, 2010

Math
Thanks!
November 15, 2010

Math
Determine the 10th term of the sequence 3, 10, 28, 72, 176... State the general term.
November 15, 2010

social studies
guarentee
November 14, 2010

social studies
you should always read the ______ before you a buy a product... answer is 9 letters long third letter is an a...
November 14, 2010

social studies
if you own a factory the factory and any equipment in it are part of your... answer is 7 letters fourth letter is an i... i have been through everything in my study guide and cannot find the answer for this one...
November 14, 2010

1
omg i absolutely love you bobpursley! thankss for the help as well. =]
November 13, 2010

Accounting
I have a problem with management accounting However, I have trouble posting the question here Is it possible that i can send it to someone for their assistance
November 13, 2010

Math(geometric sequences)
sorry i meant 4
November 13, 2010

Math(geometric sequences)
sorry i subbed 10 into it, and it was wrong.
November 13, 2010

Math(geometric sequences)
A certain antibiotic reduces the number of bacteria in your body by 10% each does. a)If four does of the antibiotic are taken, what percent of the original bacterial population is left? I think the formula is supposed to be tn=100(9/10)^-1, but when i substituted 1 into it, ...
November 13, 2010

5th grade science/ colloids
what are some examples of colloids? like a mixture,compound or sometin.... im looking for something like a colloid is water and oil mixed together and so on. thx :)
November 9, 2010

chemistry
Light with a wavelength of 405 nm fell on a strontium surface, and electrons were ejected. If the speed of an ejected electron is 3.49 105 m/s, what energy was expended in removing the electron from the metal? Express the answer in joules (per electron) and in kilojoules per ...
November 7, 2010

chemistry
Calculate the shortest wavelength of visible light (in nanometers) seen in the spectrum of the hydrogen atom. nm What are the principle quantum numbers for the levels in this transition?
November 7, 2010

chemistry
What is the wavelength of the transition from n = 2 to n = 1 for Li2+? Li2+ is a hydrogen-like ion. Such an ion has a nucleus of charge +Ze and a single electron outside this nucleus. The energy levels of the ion are -Z2RH/n2, where Z is the atomic number. nm In what region of...
November 7, 2010

chemistry
What is the de Broglie wavelength of an oxygen molecule, O2, traveling at 503 m/s?
November 7, 2010

chemistry
Calculate the frequency of electromagnetic radiation emitted by the hydrogen atom in the electron transition from n = 7 to n = 6.
November 7, 2010

math
jasmine is helping her father plant trees to create a border around their back yard jasmine plants a treesevery 25 and her father plants a tree every 15 minutes if they started together how long before they would finsh planting a treee at the same time
November 7, 2010

math
slove the folowing eqaution negtive 23=x+35
November 7, 2010

geometry
the quadrilateral has a pweimeter of 60 meters. mp and no are congruent the length of mn is 10 meters and the length of no is 15 meters what is the length of po
November 7, 2010

analytical chemistry
blank is used to dissipate the error brought about by impurities. What is the other reason of using blank in Mohr method?
November 5, 2010

English
I have a few question on linking verbs: 1. I am fond of both kinds of comics. linking verb - fond? 2. Joseph Pulitzer was the first to publish color funnies. linking verb - was? 3. The sales of his newspaper were high. linking verb - sales 4. Sunday Funnies soon became part of...
November 2, 2010

physics
What is the approximate mass of air in a living room 6.0 m times 3.9 m times 2.7 m?
November 1, 2010

PHYSICS ---HELP!
Suppose there is a circular metal disk spinning at a constant angular velocity. Now imagine near to, but not in contact with the first disk, there is an identical metal disk spinning at the same angular velocity but in the opposite direction (ie. W1 = -w2) and the surfaces are...
November 1, 2010

Physics-- Please Help!!
Suppose there is a circular metal disk spinning at a constant angular velocity. Now imagine near to, but not in contact with the first disk, there is an identical metal disk spinning at the same angular velocity but in the opposite direction (ie. W1 = -w2) and the surfaces are...
November 1, 2010

chemistry
How much heat is released when a mixture containing 12.6 g CS2 and 12.6 g Cl2 reacts by the following equation? CS2(g) + 3 Cl2(g) → S2Cl2(g) + CCl4(g) ΔH° = −230. kJ
October 31, 2010

chemistry
How many grams of oxygen gas are required to produce 7.46 kJ of heat when hydrogen gas burns at constant pressure to produce gaseous water? 2 H2(g) + O2(g) → 2 H2O(g) ΔH = −484 kJ Liquid water has a heat of vaporization of 44.0 kJ per mole at 25°C.
October 31, 2010

chemistry
Calculate the heat released when 4.260 L Cl2 with a density of 2.46 g/L at 25°C reacts with an excess of sodium metal to form solid sodium chloride at 25°C.
October 31, 2010

chemistry
A 19.5-g sample of a metal was heated to 61.67°C. When the metal was placed into 26.5 g of water in a calorimeter, the temperature of the water increased from 25.00°C to 30.00°C. What is the specific heat of the metal?
October 31, 2010

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

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