Wednesday
August 27, 2014

Posts by Lance


Total # Posts: 224

ELA
We have to find 20 collective nouns in a magazine. So far are all of these collective? 1.partners 2.Birds 3.Family 4.Amphibians 5.Crustaceans 6.builders 7.Immigrants 8.Animals 9.Grades 10.Services 11.packages 12.lodges 13.Members 14.Branches
February 28, 2012

Physics
A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 8.15 m/s at an angle of 18.5o below the horizontal. It strikes the ground 3.30 s later. How far horizontally from the base of the building does the ball strike the ground? ...
February 5, 2012

Physics
F=ma F=4xa a= 8.0m/s / 2.0 s = 4.0 m/ss F=4kg x 4 m/ss = 16 kgm/ss kgm/ss = N (newtons) F=16 N
January 25, 2012

algebra
The half-life of 234U, uranium-234, is 2.52 105 yr. If 98.4% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed?
December 16, 2011

can you please look over my answers? clauses
Amanda bought a prom dress which she considered the most beautiful dress ever made. Adjective clause:Amanda bought a prom dress Word(s) modified:dress
December 11, 2011

Social Studies
In what city did Rosa Parks defy the rules of segregation?
November 29, 2011

MATH
A bag contains 5 slips of paper. On each slip is written the name of a member of the Avila family--Mr.Avila,Mrs.Avila,their son,or one of their 2 daughters. Find the probability of each outcome if you take a piece of paper out of the bag without looking. 1. The name of a ...
November 28, 2011

Math
A bag contains 5 slips of paper. On each slip is written the name of a member of the Avila family--Mr.Avila,Mrs.Avila,their son,or one of their 2 daughters. Find the probability of each outcome if you take a piece of paper out of the bag without looking. 1. The name of a ...
November 28, 2011

Social Studies
During the 1930's, Camden,New Jersey became the site of this first. It had a parking lot big enough for 400 cars. What was it?
November 28, 2011

Social Studies
The largest island in the world, locates near Canda is called______. I think it's Greenland
November 28, 2011

Chemistry
Boiling occurs when?
November 14, 2011

Chemistry
Carbon tetrachloride CCl4 contains carbon (EN = 2.5) and chloride (EN = 3.0). Because of this, CCl4 is:
November 14, 2011

Inverse Variation
y varies inversely as x. When y = 18, x = 6. Find the constant of variation and determine the value for y when x = 27
November 9, 2011

SCIENCE
D?
November 3, 2011

SCIENCE
Conservation of natural resources could include- A. the use of more renewable sources of energy B. cutting down on the use of fossil fuels C. replacing soil and planting trees D. all of the above
November 3, 2011

Science
100
September 21, 2011

algebra
The half-life of 234U, uranium-234, is 2.52 105 yr. If 98.4% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed?
July 20, 2011

Geometry
2. Segment RT is the midsegment of the trapezoid. Find x.
July 11, 2011

Chemistry
Calculate the molar heat of neutralization in kj/mol of the reaction between HA and BOH given the following information: The temperature change equals 9C 50mL of 1M concentration of Acid 50ml of 1M concentration of Base Heat Capacity of the calorimeter is 6.5 J/C. Specific ...
June 27, 2011

Chemistry
Thank you. This helps!
June 27, 2011

Chemistry
What is Qcal?
June 27, 2011

Chemistry
Assume a piece of hot metal is added to a calorimeter containing 50mL of water at 22C. The amount of heat released by the metal was determined to be 1000J, and the equilibrium temperature in the calorimeter was 26C. Remembering that the specific heat of water is 4.18 J/gC, how...
June 27, 2011

Chemistry
Calculate the calorimeter constant if 25g of water at 50C was added to 25g of water at 25C with a resulting temperature of 35C? The answer is 52.3 but I do not know how to get to this. I hope someone can help. Thanks!
June 27, 2011

Chemistry
Assume a piece of hot metal is added to a calorimeter containing 50mL of water at 22C. The amount of heat released by the metal was determined to be 1000J, and the equilibrium temperature in the calorimeter was 26C. Remembering that the specific heat of water is 4.18 J/gC, how...
June 27, 2011

Chemistry
Thank you!
June 27, 2011

Chemistry
Assume the heat absorbed by the calorimeter was 200J. What is the calorimeter constant (Heat Capacity) if the temperature changed from 22C to 26C? I know the answer is 50 J/k. But I am not sure how to get this.
June 27, 2011

Chemistry
For each of the following pairs of elements, state whether the binary compound formed is likely to be ionic or covalent. Give the formula and name of the compound. (a) C, Cl Its covalent, but I get the formula wrong and name wrong,CCl Carbon Chloride.
June 17, 2011

Chemistry
thanks
June 17, 2011

Chemistry
(a) A sample of cesium metal reacted completely with water, evolving 48.7 mL of dry H2 at 24°C and 774 mmHg. What is the equation for the reaction? Include states-of-matter under SATP conditions in your answer. Use the lowest possible coefficients. (b) What was the mass of...
June 17, 2011

Chemistry
A neutral molecule is identified as a tetrafluoride, XF4, where X is an unknown atom. If the molecule has a dipole moment of 0.63 D, can you give some possibilities for the identity of X? (Select all that apply.) sulfur nitrogen oxygen polonium phosphorus selenium tellurium ...
June 17, 2011

social studies
No problem that's why I'm here to help
June 14, 2011

social studies
Changing the command to General Meade, instead of Gen. Hooker, put a responsive and drill instructor commander of the Army of the Potomac. Basically changing command put a better general in Meade leading the union army. Meade's force controlled the high ground which made ...
June 14, 2011

Chemistry
Yeah I was totally confused with this and I could not follow it in the book. This was a annoying problem.
June 14, 2011

Chemistry
The term degeneracy means the number of different quantum states of an atom or molecule having the same energy. For example, the degeneracy of the n = 2 level of the hydrogen atom is 4 (a 2s quantum state, and three different 2p states). What is the degeneracy of the n = 1 level?
June 14, 2011

Chemistry
Thanks Dr. Bob
June 14, 2011

Chemistry
A particular microwave oven delivers 800 watts. (A watt is a unit of power, which is the joules of energy delivered, or used, per second.) If the oven uses microwave radiation of wavelength 12.2 cm, how many photons of this radiation are required to heat 1.25 g of water 1.00&...
June 14, 2011

Chemistry
A sample of cesium metal reacted completely with water, evolving 48.7 mL of dry H2 at 24°C and 774 mmHg. What is the equation for the reaction? (Include states-of-matter under SATP conditions in your answer. Use the lowest possible coefficients.) What was the mass of ...
June 13, 2011

Chemistry
At what speed must an electron travel to have a wavelength of 13.6 pm? I got 9.89x10^-15 m/s as the answer and its wrong where did I mess up in my calculations? I keep coming up with 9.89x10^-15 m/s and its wrong.
June 12, 2011

Chemistry
I put into my calculator (6.626e-34)/(9.109e-31)(0.92e-11)= 6.69e-15 m/s but it is wrong, so what did I mess up?
June 12, 2011

Chemistry
is it V=h/m x wavelength
June 12, 2011

Chemistry
So the solution to the problem is v= wavelength x h/m?
June 12, 2011

Chemistry
At what speed must a neutron travel to have a wavelength of 9.2 pm?
June 12, 2011

Chemistry
ok thanks for your help
June 12, 2011

Chemistry
What is the energy of a photon corresponding to radio waves of frequency 1.475 106 /s? I got 9.77e-28 as an answer and its wrong so what is wrong with my calculations.
June 12, 2011

Chemistry
At what speed must an electron travel to have a wavelength of 13.6 pm? I got 9.89x10^-15 as the answer and its wrong where did I mess up in my calculations?
June 12, 2011

Chemistry
What is the wavelength of the electromagnetic radiation emitted from a hydrogen atom when the electron undergoes the transition n = 5 to n = 3?((Broken Link Removed) is a spectrum m In what region of the spectrum does the line occur? near ultraviolet far ultraviolet near ...
June 10, 2011

Chemistry
Any object, be it a space satellite or a molecule, must attain an initial upward velocity of at least 11.2 km/s in order to escape the gravitational attraction of the earth. What would be the kinetic energy in joules of a satellite weighing 2337 lb that has the speed equal to ...
June 8, 2011

Chemistry
A sample of ethanol, C2H5OH, weighing 2.84 g was burned in an excess of oxygen in a bomb calorimeter. The temperature of the calorimeter rose from 25.00°C to 33.73°C. If the heat capacity of the calorimeter and contents was 9.63 kJ/°C, what is the value of q for ...
June 7, 2011

Chemistry
The specific heat of copper metal was determined by putting a piece of the metal weighing 39.4 g in hot water. The quantity of heat absorbed by the metal was calculated to be 47 J from the temperature drop of the water. What was the specific heat of the metal if the ...
June 7, 2011

Chemistry
(a) A 102-g sample of water is placed in an insulated container and allowed to come to room temperature at 21°C. To heat the water sample to 41°C, how much heat must you add to it? kJ (b) Consider the hypothetical reaction, being run in an insulated container that ...
June 7, 2011

Chemistry
Propane, C3H8, is a common fuel gas. Use the following to calculate the grams of propane you would need to provide 383 kJ of heat. C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g) ΔH = −2043 kJ
June 7, 2011

Chemistry
Suppose you mix 20.1 g of water at 66.2°C with 45.1 g of water at 35.7°C in an insulated cup. What is the maximum temperature of the solution after mixing?
June 7, 2011

Chemistry
When ice at 0°C melts to liquid water at 0°C, it absorbs 0.334 kJ of heat per gram. Suppose the heat needed to melt 30.7 g of ice is absorbed from the water contained in a glass. If this water has a mass of 0.189 kg and a temperature of 21.0°C, what is the final ...
June 7, 2011

Chemistry
How much heat is released when a mixture containing 12.6 g CS2 and 13.2 g Cl2 reacts by the following equation? CS2(g) + 3 Cl2(g) → S2Cl2(g) + CCl4(g) ΔH° = −230. kJ
June 7, 2011

Chemistry
A 19.5-g sample of a metal was heated to 61.67°C. When the metal was placed into 27.1 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?
June 7, 2011

Chemistry
Hydrogen is burned in oxygen to release heat. How many grams of hydrogen gas must be burned to release enough heat to warm a 50.0 g block of iron, giving 5 mol of water? 2 H2(g) + O2(g) → 2 H2O(g) ΔH = −484 kJ Iron has a specific heat of 0.449 J/(g·°...
June 7, 2011

Chemistry
Nitrous oxide, N2O, has been used as a dental anesthetic. Suppose that the average speed of an N2O molecule at 25°C is 377 m/s. (It is actually 379 m/s.) Calculate the kinetic energy (in joules) of an N2O molecule traveling at this speed.
June 7, 2011

Chmistry
Any object, be it a space satellite or a molecule, must attain an initial upward velocity of at least 11.2 km/s in order to escape the gravitational attraction of the earth. What would be the kinetic energy in joules of a satellite weighing 2337 lb that has the speed equal to ...
June 7, 2011

CHEMISTRY
pH=~9.2
May 17, 2011

math
you have16 coins that are heads up an18 coins that are tails up. After you add some coins that are tails up, the ratio of heads up to tails up is 1 to 1.5. How many coins are tails up? How many coins are in all?
April 30, 2011

algebra
Please help with solving this 5r(6rs-12st)t
April 19, 2011

chemistry
Consider the reaction 2Al + 3CuSO4 = Al2(SO4)3 + 3Cu What is the maximum amount of Cu (63.5 g/mol) that could be produced by reacting 20.0 grams of Al (27.0 g/mol) with excess How do i do this?
November 17, 2010

college
A 26 loudspeaker is suspended 3.0 below the ceiling by two cables that are each 40 from vertical. What is the tension in the cables? help please!
October 6, 2010

Physics
A banked circular highway curve is designed for traffic moving at 60 km/h. The radius of the curve is 207 m. Traffic is moving along the highway at 42 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow cars to take the turn ...
September 27, 2010

math
find the unknown number in equation 9s=17+1
September 14, 2010

Anatomy
another name and cause of hyperthyroidism
June 8, 2010

physics 101
explain rocket propulsion in terms of conservation of momentum
April 25, 2010

Finance
Thank you Reiny.
March 22, 2010

Finance
How much cash must be deposited in a savings account In Order To Accumulate 50,000 At End Of 7 Years With 12 % Interest Rate?
March 22, 2010

finance
solve for x 10000 = 2500(1.0425)^3 + X(1.0425)^2 + 3500(1.0425)^
October 27, 2009

Finance
what is the present value of annuity of $950 per year for 18 years ( with the first payment to be made today and the last payment to be made 17 years from today) give an interest rate of 7.5% p.a?
October 26, 2009

Finance
Solve for x. 10000 = 2500(1.0425)^3 + X(1.0425)^2 + 3500(1.0425)^1
October 26, 2009

algebra
x + 2y = 4 and x - 4y = 8, solve for x
September 29, 2009

Finance
A firm has ROA of 14% and a debt/equity ratio of 0.8. The ffirms ROE is?
September 24, 2009

Finance help
Assume Williams inc has: Debt ratio= 40% Net profit margin= 10% Return on assets = 25% Find williams Total Asste Turnover Ratio
September 24, 2009

World History
Taoism: advocating a simple honest life and noninterference with the course of natural events.it is philosophical system developed by Lao-tzu and Chuang-tzu as-well
November 4, 2008

PHYSICS
A 745i BMW car can brake to a stop in a distance of 122 ft from a speed of 60.0 mi/h. To brake to a stop from a speed of 80.0 mi/h requires a stopping distance of 221 ft. What is the average braking acceleration for the following intervals? Express the answers in mi/h/s and in...
November 1, 2008

math
And if f(x)=1/2 and g (x)=x-2 how do i calculate: F-1 (4)
April 15, 2008

math
is this done correctly?? given that f(x) and g(x)=x-2 calculate a)g(-2)=-2-2=-4 b)fg(4)=1/2 *4=2
April 15, 2008

Physics
To stop a car, first you require a certain reaction time to begin braking. Then the car slows down at a constant rate. Suppose that the total distance moved by your car during these two phases is 56.7 m when its initial speed is 85.0 km/h, and 24.4 m when the initial speed is ...
March 5, 2008

Biology
If you mean things in our everyday life this will help: http://en.wikipedia.org/wiki/Economic_importance_of_bacteria
February 26, 2008

Physics continuation - Damon please help
There is not enough information, was there a previous question or other info?
February 26, 2008

CHEM
The answer is 3
November 26, 2007

History
What was the function of the egyptian funerary complex?
October 20, 2007

science
That is a magnetic field.
October 3, 2007

Math
If you multiply both sides of the ratio by any number, their simplest form will not change. So 3x2=6 10x2=20 6:20 in simplest form is 3:10 Another example is 9:30
October 3, 2007

sience
Note that is all three laws listed.
October 3, 2007

sience
1. An object in motion will remain in motion unless acted upon by a net force. 2. Force equals mass multiplied by acceleration. (F=ma) 3. To every action there is an equal and opposite reaction.
October 3, 2007

Physics
I understand now, thanks.
October 3, 2007

Physics
double?
October 3, 2007

Physics
Then what is the correct answer?
October 3, 2007

Physics
A shell is fired horizontally and takes .5 seconds to fall. If its initial speed were doubled, the time it would take to fall would be: .25 seconds I know the answer, but I need an explanation if possible.
October 3, 2007

Math
t = (13)(5)
September 27, 2007

Andrew
Plastids are major organelles found in plants and algae. They can be anything from Chloroplasts to Chromoplasts or other functioning parts inside a plant or algae cell.
September 26, 2007

biology
Protein, Nucleic Acids, Lipids, and Carbohydrates
September 26, 2007

math 1st. grade
Adding Doubles just means adding the same numberr to itself. Like 2+2=4, 3+3=6, So addind doubles to 18 would be 0+0=0, 1+1=2, 2+2=4, and so forth up to 9+9=18. Maybe this will help you solve the problem. I have a work sheet that has Add Doubles to 18 with questions asking how...
May 21, 2007

science
http://images.google.com/images?as_q=&hl=en&gbv=2&output=images&svnum=10&btnG=Google+Search&as_epq=homogeneous+mixture&as_oq=&as_eq=&imgsz=&as_filetype=&imgc=&as_sitesearch=&safe=images http://images.google.com/images?svnum=10&hl=en&gbv=2&safe=images&q=+%22heterogeneous+...
May 21, 2007

socil studies
http://en.wikipedia.org/wiki/African_American#Total_African_American_population how many african americans live today.
May 11, 2007

L>A
CAN SOMEONE FIND ME A TIME LINE ABOUT AVI? (Avi is a famous writer) THANk YOU!! HAPPY SB07 You should be able to construct a timeline using the dates and Avi's ages by reading this site. http://content.scholastic.com/browse/contributor.jsp?id=3262 Here is an excellent ...
April 10, 2007

biology
The word step is misleading. http://biology.about.com/library/bltranslation.htm How many steps are there in translation? I've been searching and so far I have found a site that says that there are 5 steps, one that says 4 steps, and one that only has three steps.
March 21, 2007

Pages: <<Prev | 1 | 2 | 3 | Next>>

Search
Members