Friday
December 19, 2014

Posts by Melissa


Total # Posts: 1,130

social studies
how many outfits did cooks have in the medieval times
January 8, 2011

social studies
but how do people treat the cook in medieval times
January 8, 2011

social studies
how do people treat cooks in medieval times
January 8, 2011

social studies
how often do cooks in medieval times speak to the lord?
January 8, 2011

social studies
can cooks in medieval times get married and if so who to?
January 8, 2011

social studies
what would the materials be as a cook in medieval times?
January 8, 2011

social studies
in medieval times as a cook where on the manor estate is your shelter
January 8, 2011

social studies
how do cooks get a job in medieval times?
January 8, 2011

social studies
who would cooks in medieval times work for?
January 8, 2011

social studies
where did people work if they were a cook in medieval times
January 8, 2011

math
a.u.s nickel contains 3.9g of copper and 1.2g of nickel. how many kilograms of copper must be combined with 500 kg of nickel to make nickel coins?
January 8, 2011

Grammar
omg thank u soooooooooooo much
January 6, 2011

physics
A rope goes over a circular pulley with a radius of 6.3 cm. If the pulley makes four revolutions without the rope slipping, what length of rope passes over the pulley?
January 5, 2011

Economics
explain why the cost tructure associated with many kinds of information goods and services might imply a market supplied by a small number of large firms. At the same time, some internet businesses such as grocery home deliveries have continually suffered steeplosses ...
January 2, 2011

Math
Mark each of the following True or False. ___ a. All vectors in an orthogonal basis have length 1. ___ b. A square matrix is orthogonal if its column vectors are orthogonal. ___ c. If A^T is orthogonal, then A is orthogonal. ___ d. If A is an n*n symmetric orthogonal matrix ...
January 2, 2011

Spanish
Thank you-I understand it now more clearly
December 21, 2010

Spanish
How do I say I'm wearing black pants? "Llevo pantalones negro." or do I have to add an "s" to negro? Thank you
December 21, 2010

Spanish
Could someone help me please? Which of the following says "some strong men" in Spanish los hombres fuertes unos hombres fuertes I think it is unos hombres fuertes becuase the los hombres fuertes states the strong men, doesn't it
December 21, 2010

physics
Four identical masses of 2.7 kg each are located at the corners of a square with 1.4 m sides. What is the net force on any one of the masses?
December 19, 2010

physics
someone pleaaaase answer my question! i have no clue how to do it!
December 19, 2010

physics
A 70 kg man weighs 686 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 14% of his body weight?
December 19, 2010

Physics
A 3.90×10^2kg cube of ice at an initial temperature of -18.0degreesC is placed in 0.480kg of water at 41.0degreesC in an insulated container of negligible mass. Calculate the change in entropy of the system. I found the equilibrium temperature to be at 304.9K, then used ...
December 7, 2010

chemistry
what is the molarity of 275mL of a solution containing 23.83 mg of Mg Cl(2)<small 2
December 3, 2010

Statistics
A group of doctors is trying to see if a vaccine causes a certain type of disease. They take individuals with the certain disease and individuals without the disease. They then use research to estimate the relative incidence of the onset of the disease after the vaccination. ...
December 3, 2010

physics
An air puck of mass m1 = 0.45 kg is tied to a string and allowed to revolve in a circle of radius R = 1.0 m on a frictionless horizontal table. The other end of the string passes through a hole in the center of the table, and a mass m2 = 1.10 kg is attached to it. The ...
November 30, 2010

physics
A light spring of spring constant k = 160 N/m rests vertically on the bottom of a large beaker of water. A 5.00 kg block of wood (density D = 700 kg/m3) is connected to the spring, and the block ? spring system is allowed to come to a static equilibrium
November 30, 2010

Chem
what mass of calcium oxalate can be dissolved in 180 ml of distilled water before a precipitate forms?
November 29, 2010

statistics
In one history class, 34 students took an exam. The mean of the exam was 52 with a standard deviation of 13. If the instructor is going to assume data are normally distributed and assign grades on a curve, then she will assign an A to the top 10% of the class, B's to the ...
November 29, 2010

english
At my son’s very first softball game his team did not do very well. No one seemed to be able to hit the ball or run the bases when they were up to bat. When they were in the field they would either run from the ball or be nowhere near it when they attempted to catch it. ...
November 29, 2010

science
What are the hard and fast rules of Science, if any?
November 24, 2010

6th grade
Each letter in each questio stands for a 1-digit number. in each question, no two letters maystand for the same number. Two separate problems are unrelated.Find a value for each letter MOON Use Numbers 4,7,5,6,2.8,9,3 x AT ____ ACROSS
November 21, 2010

chemisty
what is the molarity of ZnCl2 that forms when 30.0 g of zinc completely reacts with CuCl2 according to the following reaction? Assume a final volume of 285 mL. Zn(s) + CuCl2(aq)--> ZnCl2(aq) + Cu(s)
November 20, 2010

U.S history
My two colonies are New Jersey and Pennsylvania.How are they similar and how are they different?Which one would you live in,and why?
November 18, 2010

us history
Think about two colonies.How are they similar?How are they different?Decide which colony you would like to live in.
November 18, 2010

physics
I know this has been posted many times but I keep trying and cannot get the right answer, A place kicker must kick a football from a point 39.9 m from a goal. As a result of the kick, the ball must clear the crossbar, which is 3.05 m high. When kicked the ball leaves the ...
November 17, 2010

physics
I know this has been posted many times but I keep trying and cannot get the right answer, A place kicker must kick a football from a point 39.9 m from a goal. As a result of the kick, the ball must clear the crossbar, which is 3.05 m high. When kicked the ball leaves the ...
November 17, 2010

calculus
Have you found an answer yet?
November 16, 2010

Math
I figured it out 1 gallon = 8 pints and to figure the 3/4. you take 3/4 x 8/1= 24/4 and that = 6. so 6+8=14
November 16, 2010

Math
nick has 1 3/4 gallon of milk how many pints does nick have. I think it is 14.
November 16, 2010

Algebra
Consistent and independent?
November 13, 2010

Algebra
3x-9y=63 2x-6y=-18 Solve system of equations by graphing then classify as Independent on dependent and consistent or inconsistent?
November 13, 2010

Algebra
I still don't understand?
November 13, 2010

Algebra
One canned juice is 20% orange juice: another is 10% orange juice. How many liters of each should be mixed together in order to get 10L that is 13% orange juice.How many liters of the 20%? How many liters of the 10%?
November 13, 2010

Chemistry
Ethanol burns to produce 1300.0 kJ/mol and has a heat capacity of 65.6 J/mol·K. If Dr. Porter has 1.00 L of liquid ethanol (density = 0.789 g/mL), what is the minimum mass of fuel that should be removed and burned to heat the remaining ethanol from 25 °C to 90 °...
November 9, 2010

Chemistry
Hydrofluoric acid etches glass by reacting with the silica in it according to the following equation. H° = 54.5 kJ and S° = 436.5 J/K Calculate G° at 25°C for this reaction.
November 9, 2010

Physics
Newton's third law says that for every action there is an opposite and equal reaction. Does that mean that the the average thrust force the gas exerts on teh engine and rocket would each be 5 N?
November 7, 2010

Physics
A typical model rocket engine exerts an average force of 5 N on its exhaust gas. How much average thrust force does the gas exert on the engine and rocket?
November 7, 2010

Chem
2 H2O (l) → 2 H2 (g) + O2 (g) Using the thermodynamic values to calculate accurate values of ΔHr and ΔSr, will the reaction be product favored at high temperature? Why? r stands for reaction
November 5, 2010

Chem. only regarding formula.
how do do calculate ΔHr and ΔSr?
November 5, 2010

Chem. thankss!!!
1.0 mol of water (c=4.184 J/g.oC), 1.0 mol of ethanol (c=2.46 J/g.oC), 1.0 mol of carbon tetrachloride (c=0.861 J/g.oC), and 1.0 mol of ethylene glycol (c=2.42 J/g.oC) at 50oC were each placed into a separate coffee cup calorimeter and the temperature recorded. The temperature...
November 5, 2010

Chem
In an experiment 50 g of a metal was heated to 100oC and placed in 200 g of a liquid at 25oC. Which of the following combinations of metal and liquid will produce the largest temperature increase in the liquid? (Assume that there is no energy transfer to the surroundings.) ...
November 5, 2010

CHEM.
Zinc is often used to calibrate calorimeters because it undergoes a very sharp phase transition from the solid to the liquid at 419.5oC. Calculate the enthalpy change when 5 g of zinc metal is heated from 100oC to the point where the entire sample is melted. (The heat of ...
November 5, 2010

CHEM. help please
Consider a system of 3 molecules, A, B, and C. Suppose the 3 units of energy can be distributed over the three atoms where each atom can have no energy, one unit, two units or 3 units of energy. Assume each of the 10 possible arrangements is equally probable. What's ...
November 5, 2010

Chem Help please
Consider a system of 3 molecules, A, B, and C. Suppose the 3 units of energy can be distributed over the three atoms where each atom can have no energy, one unit, two units or 3 units of energy. Assume each of the 10 possible arrangements is equally probable. What's ...
November 5, 2010

Calculus
Given the demand function q=173-5p, determine the price where demand has unit elasticity.
November 4, 2010

Calculus
Given the demand function q=173-5p, determine the price where demand has unit elasticity.
November 4, 2010

Calculus
the demand for ground chuck(hamburger) in a certain region of the US is given by q= 3.41p^-0.22. is the demand for ground chuck elastic or inelastic
November 4, 2010

Calculus
a local office supply store has an annual demand for 50,000 cases of photocopier paper per year. it costs $2 per year to store a case of photocopier paper, and it costs $50 to place an order. Find the optimum number of cases of photocopier paper per order
November 4, 2010

CHemistry
Use the bond energies given in the "Bond Energy" table (can be gained from google) to estimate the delta Ho for the reaction given below. 2ClF3(g) + 2O2(g) Cl2O(g) + 3OF2(g) I did this: 1530 + 996 - (410 + 570) = 1546. But the answer was wrong. I dont know where I ...
November 2, 2010

Chemistry
Use the bond energies given in the "Bond Energy" table (can be gained from google) to estimate the delta Ho for the reaction given below. 2ClF3(g) + 2O2(g) Cl2O(g) + 3OF2(g) I did this: 1530 + 996 - (410 + 570) = 1546. But the answer was wrong. I dont know where I ...
November 2, 2010

Chemistry- helpp!
The equation for synthesis of the poisonous gas COCl2 is CO(g) + Cl2(g)COCl2 If 43.2 kJ of energy is evolved when 39.5 g of COCl2 is synthesized, what is the molar enthalpy for this synthesis? THANK YOU!
November 2, 2010

Chemistry
Calculation of the sodium chloride (NaCl) content and evaporation: 1. The amount of sodium chloride in the original mixture may be determined indirectly by adding the masses of ammonium chloride and sand together and subtracting the sum from the initial sample mass of 10g. 2. ...
October 23, 2010

Chemistry
I am doing a lab online and have no clue on how to get started with the following questions? Please Help me! 1. Calculate and record the following (in grams): (a) mass of NaCl by subtraction of other components: (b) measured mass of NaCl after boiling away water: 2. Calculate ...
October 23, 2010

chemistry
What volume (in Liters) of hydrogen must react to form 17.0L of ammonia according to the following balanced equation: N2(g) + 3H2(g) --> 2NH3(g) Ratio from equation is H : NH3 = 3 : 2 = 3/2 : 1 = 17x3/2 : 17 = 25.5 : 17 17 L of hydrogen can you check my work is this right?
October 17, 2010

college chemistry
so it would be (1)(.0036)=n(.0821)(273)?
October 17, 2010

college chemistry
A volume of 0.285 L of a gas at STP weighs 0.537 g. Calculate the molar mass of the gas (1)(0.285) = n(0.0821)(273). .0036 is this correct?
October 17, 2010

English
make 2 words, first one 8 letters and second work 4 letters out of these s l r t n r u p a e s a
October 17, 2010

english
I'm doing an analysis on a class text and a self chosen related text and one of the things the sheet says to do is to identify and define the context of my related text. What does this mean?
October 17, 2010

Sociology
How does studying social institutions help sociologists understand society?
October 13, 2010

Math-Calculus
If f(x)=5ex+4xe find f'(x) .
October 11, 2010

Help! Physics!!
Water flows (v = approx 0) over a dam at the rate of 660 kg/s and falls vertically 86 m before striking the turbine blades. Calculate the rate at which mechanical energy is transferred to the turbine blades, assuming 53% efficiency. Express your answer using two significant ...
October 7, 2010

Help! Physics!!
A 120-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 400 N. For the first 17 m the floor is frictionless, and for the next 17 m the coefficient of friction is 0.34. What is the final speed of the crate? Express your answer using two ...
October 7, 2010

college physics
they have the same speed as each other at the instant they hit the ground. Trick question!
October 5, 2010

Algebra
Write 9850 in scientific notation
October 3, 2010

AP English Literature
I really like that as a thesis statement. Thank you so much! (:
October 3, 2010

AP English Literature
No...? I don't think so. I just want to make a point about how it's wrong to take the rights of a newborn baby because their parents sacrificed themselves to cross the border, and have their child be born in America, so it's easier for their child to have a '...
October 3, 2010

AP English Literature
I looked over it, but for some reason it didn't really help me.
October 3, 2010

AP English Literature
The thesis can only be in one place, which is the ending of the introduction. My thesis: "Everyone is entitled to their own opinion on how this problem should end, but it must be resolved." This "Illegal immigrants are now having "anchor babies" in the...
October 3, 2010

AP English Literature
Well so far I have my intro. which is this: Throughout the years, it has been known that if one's newborn is born in America, they have automatic citizenship, regardless of what their parent's situation may be; which is what the 14th Amendment states. Illegal ...
October 3, 2010

AP English Literature
I basically want to solve this problem and I want to talk about people's reaction, pros & cons, etc.
October 3, 2010

AP English Literature
I'm doing a research essay about "anchor babies", or in other words, babies born from illegal immigrants. How would you write a good thesis?
October 3, 2010

Physics
An airplane flies at 200.0 km/h relative to the air. What is the velocity of the plane relative to the ground if it flies during the following wind conditions? a. a 50.0-km/h tailwind b. a 50.0-km/h headwind.
October 3, 2010

Physical chemistry
Estimate the vapor pressure of sea water at 20C given that the vapor pressure of pure water is 2.338 kPa at that temperature and the solute is largely Na+ and Cl- ions, each present in about .50 mol/dm^3. I'm pretty sure the formula to use is pj=xjpj'. Where pj' is...
September 30, 2010

Medical Terminology
Treatment that's designed to reduce the intensity of painful symptoms but that doesn't produce a cure is
September 28, 2010

Physics
So in solving the answer it would be F=(8.99E9)*(2.5E13*1.6E-19)*(2.5E13*1.6E-19)/.50^2? If so, I dont think I did it right. I ended up with an answer of .57536
September 26, 2010

Physics
Two very small spheres are initially neutral and separated by a distance of 0.50 m. Suppose that 2.50 x 10^13 electrons are removed from one sphere and placed on the other. What is the magnitude of the electrostatic force that acts on each sphere?
September 26, 2010

Mastering Chemistry
Molarity(M)=amount (mol) of solute/volume (L)of solution. im gonna guess you have 11.0g and 75.0 mL convert ml to L -> 75/1000=0.075L ->177 molar mass of Luminol 11.0 x(1/177)/0.075 = your answer in units of M
September 25, 2010

Calculus
If h(t) represents the height of an object above ground level at time t and h(t) is given by h(t) = −16t2 + 96t + 1, find the height of the object at the time when the velocity is zero.
September 22, 2010

geometry
If m<PQR=(10x-7),m<RQT=5x, and m<PQT=(4x=6)
September 20, 2010

Chemistry
What is the molecular, ionic and net ionic formula for Acetic acid and sodium nitrate Molecular: Ionic: Net Ionic:
September 20, 2010

physics
When it says magnitude of velocity is that the same as the final velocity before impact? The word "magnitude" threw me off.
September 19, 2010

physics
A child throws a ball with an initial speed of 8 m/s at an angle of 40 degrees above the horizontal. The ball leaves her hand 1 m above the ground. How long is the ball in flight before it hits the ground? What is the magnitude of the ball's velocity just before it hits ...
September 19, 2010

physics
Richard is driving home to visit his parents125 mi of the trip are on the interstate highway where the speed limit is 65 mph Normally Richard drives at the speed limit, but today he is running late and decides to take his chances by driving at 80 mph.how many minutes will he ...
September 19, 2010

Chemistry
A mixture contains only NaCl and Al2(SO4)3. A 1.45-g sample of the mixture is dissolved in water and an excess of NaOH is added, producing a precipitate of Al(OH)3. The precipitate is filtered, dried, and weighed. The mass of the precipitate is 0.107 g. What is the mass ...
September 18, 2010

physics
Mary needs to row her boat across a 120 m -wide river that is flowing to the east at a speed of 1.4 m/s. Mary can row the boat with a speed of 2.0 m relative to the water. 1. How long does it take Mary to reach the opposite river bank ? 2.If Mary rows straight north, how far ...
September 15, 2010

Chemistry
How many moles of H2 can be produced from 7.74g SrH2? equation:SrH2 + 2H2O = Sr(OH)2 + 2H2
September 14, 2010

Physical chemistry
Calculate the pressure exerted by 1.0 mol C2H6 behaving as a perfect gas
September 13, 2010

Calculus
If h(t) represents the height of an object above ground level at time t and h(t) is given by h(t)=-16t2+11t+1 find the height of the object at the time when the speed is zero.
September 13, 2010

Calculus
ignore the "d=". Sorry!
September 13, 2010

Calculus
Let F(s)=5s2+5s+4 . Find a value of d greater than 0 such that the average rate of change of F(s) from 0 to d equals the instantaneous rate of change of F(s) at s=1. d=
September 13, 2010

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