Tuesday
October 21, 2014

Posts by jj


Total # Posts: 920

Chemisrty
Kate has 35 grams of xenon gas in a 15 liter tank at 11 degrees celsius and 250 atmospheres. If she heats the gas in the tank up to 2500 degrees celsius, what will its pressure be, in Kilopascals?
December 19, 2010

Physics
A puddle holds 150 g of water. If 0.50 g of water evaporates from the surface, what is the approximate temperature change of the remaining water? (Lv = 540 cal/g)
December 19, 2010

Physics
If a 1000-kg car was moving at 30 m/s, what would be its kinetic energy expressed in the unusual (for kinetic energy) units of calories? (1 cal = 4.186 J)
December 19, 2010

Physics
A 2.00-kg block of ice is at STP (0°C, 1 atm) while it melts completely to water. What is its change in entropy? (For ice, Lf = 3.34 ´ 105 J/kg)
December 19, 2010

Physics
A heat engine exhausts 3 000 J of heat while performing 1 500 J of useful work. What is the efficiency of the engine?
December 19, 2010

Physics
A 10-kg piece of aluminum (which has a specific heat of 900 J/kg×°C) is warmed so that its temperature increases by 5.0 C°. How much heat was transferred into it?
December 19, 2010

physics
Ok thank you
December 19, 2010

physics
This is my work :) (50miles/hr)x(1.609km/1mile)x(1000m/1km)x(1meter/60sec)x(1hour/60 min) =22.35 meter per second.
December 18, 2010

physics
what is 50 miles per hour in meters per second ?
December 18, 2010

physics
what is 50 miles per hour in meters per second?
December 18, 2010

Physics
(6.5 ft) x(1meter/3.281ft) =1.98 meters. Is this a correct way ?
December 18, 2010

Physics
A player height is 6.5 ft.What is his height in meters ?( 1m = 3.281ft)
December 18, 2010

computer
I have to write a researh paper on Intel Core i3 processor ? I need some ideas
December 17, 2010

Algebra
thank u sooo much!!!!!!!:)
December 14, 2010

Algebra
Kevin has $6.45 in coins in his cash box. The numbers of quarters is one less than twice the number of dimes. The number of nickels is one less than twice the number of quarters. The value of the pennies is the same as the value of the nickels. How many of each Type of coin ...
December 14, 2010

computer architecture
How many bits does a word of storage contain on the IBM-PC?
December 12, 2010

java programming
Enhance bank account class by adding preconditions for the constructor and the deposit method that require the amount parameter to be atleast zero, and a precondition for the withdraw method that requires amount to be a value between 0 and the current balance.Use assertions to...
December 9, 2010

MATHS
A man is 2 years younger than his wife.Their current ages both are prime numbers. Next year his wife age will be a multiple of 11.And the husband will be the product of two consecutives. How old are both ?
December 1, 2010

Physics
A player is 6.5 ft tall.What is the player’s height in meters?
November 29, 2010

english
well thanks but i need 3 sources and i have to descibe my applications in detail and i cant find all the applications in just 3 sources
November 28, 2010

english
Sap is known as System Application and product. It creates same database where it can run all the applications in a company. Basically it is software which allows the people in businesses to keep track and updates of their customers and business communications and dealings. It...
November 28, 2010

english
i have to write a research paper on SAP Applications and i need some authentic websites ?
November 28, 2010

english
is it right when we say am confused or i am in confusion or confused ?
November 25, 2010

Calculus
Compute the derivatives of : f(x)= x^7 + 7^x+ 7^7
November 22, 2010

PHYSICS
What is the reaction effect of the following action effects? a) Earth orbits the sun b) Ball accelerates downward Thank YOu.
November 21, 2010

PHYSICS
What is the reaction effect of the following action effects? a) Earth orbits the sun b) Ball accelerates downward Thank YOu.
November 21, 2010

PHYSICS
Indentify the direction of the netforce in each of the following situations. A marble moves in a circular path inside a paper plate at a constant speed. The moon orbits the earth. An air hockey puck moves smoothly across the air hockey table after being struck. A rocket is ...
November 20, 2010

PHYSICS
Indentify the direction of the netforce in each of the following situations. A marble moves in a circular path inside a paper plate at a constant speed. The moon orbits the earth. An air hockey puck moves smoothly across the air hockey table after being struck. A rocket is ...
November 19, 2010

math
Use a linear approximation (or differentials) to estimate the given number. e^-0.01
November 17, 2010

Physics
I think it's the first person because in order to finish something faster, it will require more work. For example in a race. The person who finishes first has to run faster.
November 15, 2010

PHYSICS
If a goalie faces an 80mph slap shot hit from 40 feet away, how much time is there before puck arrives at the net (5280ft= 1 mile) If the goalie requires half of the above time to complete his move to deflect the puck, how much time does the goalie have to react?
November 15, 2010

Chem
Determine the number of moles of silver chloride formed when three moles of sodium chloride are reacted completely with silver nitrate
November 15, 2010

Calculus
The length of a rectangle is increasing at a rate of 9 cm/s and its width is increasing at a rate of 7 cm/s. When the length is 15 cm and the width is 10 cm, how fast is the area of the rectangle increasing?
November 9, 2010

cal
Differentiate the function. f(x) = sin(7 ln x)
November 9, 2010

10th grade
BC=3x+2 and CD= 5x-10. Solve for x.
October 30, 2010

social studies
1. What was the first PERMANENT European colony in North America? hope someone can help!!
October 27, 2010

Accounting
That would be 200,000 times the future value of a single sum factor (which is found in the tables) 6% at 5 years which is 1.33823. So 200,000(1.33823)=267,646 the answer is C.
October 26, 2010

Please Algebra 1
Roberta sold fifty tickets for the school play. Roberta sold ten more student tickets than adult tickets. How many student tickets did Roberta sell? From this result, if the total cost of a student ticket was three-fourths the cost of an adult ticket, and Roberta collected a ...
October 17, 2010

math
its 10
October 12, 2010

PreCalc
The decibel (dB) is defined as dB= 10log (P2/P1), where P2 is the power of a particular signal. P1 is the power of some reference signal. In the case of sounds, the reference signal is a sound level that is just barely audible.How many dBs does a sound have if its power is 665...
October 9, 2010

physics
This is what I found.... When the car is at the top of the track the centripetal force consists of the full weight of the car. mv2/r = mg Applying the conservation of energy between the bottom and the top of the track gives (1/2)mv^2 + mg(2r) = (1/2)mv0^2 Using both of the ...
October 8, 2010

Math
Sheila's age is two years more than twice Nicole's age. The sum of their ages is the same as Steven's age. If Steven's age is ten years less than five times Nicole's age, ,find the age of each. Write a verbal model!
October 6, 2010

english
Examples of personal interaction with a friend or family member about personal finance or credit cards. This is an emergency!!! Help please
September 24, 2010

geometry
raise pq and qr are perpendicular point s lies in the interior of angle pqr if measure of the angle pqs equals 4=7a and the measure of angle sqr = 9+4a find the measure of angle pqs and sqr
September 8, 2010

Anatomy and Physiology
Each nerve impulse begins in the dendrites of a neuron's. the impulse move rapidly toward the neuron's cell body and then down the axon until it reaches the axon tip. a nerve impulse travels along the neuron in the form of electrical and chemical signals. Acetylcholine...
July 31, 2010

Calculus
Application of Derivatives and Integrals: A sign 3 feet high is placed on a wall with its base 2 feet above the eye level of a woman attempting to read it. How far from the wall should she stand to get the best view of the sign, that is, so that the angle subtended at the ...
July 11, 2010

Calculus
A sign 3 feet high is placed on a wall with its base 2 feet above the eye level of a woman attempting to read it. How far from the wall should she stand to get the best view of the sign, that is, so that the angle subtended at the woman’s eye by the sign is a maximum?
July 11, 2010

math
Thanks for the help!
June 2, 2010

math
Solve for x= x^2 + 45= 6x
June 2, 2010

Information Science
how do I begin the project
June 1, 2010

Math
Simple interest investment made for a period of 4years to R7800 with an initial investment of R4000 for this investment
May 29, 2010

Compters and software in a bussiness
How are computers and software aplications utilized in a bussiness setting to solve bussiness problems?
May 21, 2010

Geo
For questions 33 and 34, write the equations for the lines parallel and perpendicular to the given line through the given point (one point for each equation). x - 3y = 9 through (2, -1)
May 21, 2010

intermidate alegebra
ac Method 15t^ -17t-4 ac=15*4=60 This the ac Method can you help me finished this problem
May 12, 2010

math
y X 8 = 72
May 10, 2010

english
Did you know that Paul Revere rode through the countryside calling men to arms class? where does the comma belong? how can i rewrite this sentence with a comma?
May 10, 2010

Chemistry
How do you find pKa?
May 5, 2010

algebra
-21+3z/2 divide 121z-847/4
May 4, 2010

algebra
Thank you so much!
May 3, 2010

algebra
Bob mosw his lawn in 3 hours, Jane can mow the same lawn in 5 hours. How much time would it take for them to mow the lawn together?
May 3, 2010

Pre-algebra
Factor the expression 14+21c
April 21, 2010

commas and run on sentences
You got it
April 21, 2010

Physics
a basketball player is trying to make a half-court ump shot and releases the ball at the height of the basket. assuming that the ball is launched at 51 degrees, 14 m from the basket, what speed must the player give the ball?
April 18, 2010

college
Answer the problems below and show or explain how you arrived at your final answer. 1. You sell premium toasters and are making a pricing decision. At a price of $100 (or “p = $100”) you predict that you can sell 30 of these premium toasters at your Scottsdale, ...
April 13, 2010

Algebra1
a company sells brass and steel machine parts. One shipment contain 3 brass and 10 steel parts and cost 48.00. A second shipment contain 7 brass and 4 steel parts and cost 54.00. Find the cost of each type of machine part. How much would a shipment containing 10 brass and 13 ...
April 10, 2010

math 156
Indicate whether the sequence is arithmetic, geometric or neither 10,12,22,32,42.....
April 7, 2010

calculus-limits??
i keep on doing something wrong on this problem,i guess im forgetting to add or subtract some number. use f'(x)=lim h-->0 f(x+h)-f(x)/h to find the limit: lim h-->0 sin^(3)4(x+h)-sin^(3)4x/h
March 24, 2010

math
What are the number in the magic square of 4 by 4 if the magic number is 38?
March 16, 2010

Chemistry
Christ lover, you're a life saver!!!
February 15, 2010

Art history
Can you tell me if these sculptures have open or closed contour? I can't post the link but if you search the name and the numbers it should show up. Sculpture 1: Mother and Child [1979.206.121] Sculpture 2: Virgin and Child [33.23]
February 3, 2010

Intro to art history
I have to write a paper comparing two art sculptures. I have write if it's an open or closed contour but I don't know what that means.
February 3, 2010

Accounting
What kind of companies (industries) have negative cash flow from investing activities? And what kind of companies have positive cash flow from investing activities?
January 26, 2010

chemistry
describe the general characteristics of metals, nonmetals, and metalloids.
January 24, 2010

Algebra
Thank you for your help.
January 21, 2010

Algebra
John's insurance company will replace his car if repair costs exceed 80% of the car's value. The car recently sustained $8000 worth of damage, but it was not replaced. What was the value of his car?
January 21, 2010

physics
A tin can is filled with water to a depth of 30 cm. A hole 11 cm above the bottom of the can produces a stream of water that is directed at an angle of 34° above the horizontal. (a) Find the range of this stream of water. (b) Find the maximum height of this stream of water.
January 14, 2010

physics
Water flows in a cylindrical, horizontal pipe. As the pipe widens to twice its initial diameter the pressure in the pipe changes. Calculate the change in pressure between the wide and narrow regions of the pipe. Give your answer as an expression in terms of the density of ...
January 14, 2010

ITALIAN
hello, can anyone translate this? could be a poetic-like translation. i just can't seem to make sense out of this, when i use a dictionary or an online translator. help please! thank you. "Si che morte Si che morte e lontananza Provi incor pena infinita che sol perde ...
January 8, 2010

language arts
i need help with my novel : watership down by richard adams
January 7, 2010

german
these are SO helpful. thank you so much. i will definitely check out the website. thank you
December 31, 2009

GERMAN
Wie war das in der Kindheit? 1. Als ich Kind war, ___ ich immer radfahren. will woll wolle wollte wollen 2. Als du Kind warst, ___ du nicht allein über die Straße gehen. darfte durfte darfst durftest dürftest 3. Als Monika Kind war, ___ sie nicht, daß es ...
December 30, 2009

german
Reiny, thank you. is there anyway you can tutor me/ help me online with my german? please let me know
December 30, 2009

german
Mein Mitbewohner hat alles umgestellt! Gestern waren die Musikbozen hinter (1)_____ Sofa. Aber Jurgen hat sie unter (2)____ Tisch gestellt. Das Telefon war auf (3)_____ Tisch. Aber Juergen hat es an (4)____ Wand gehaengt. Die Pflanze war in (5)_______ Ecke, aber jetzt ist sie ...
December 30, 2009

physics
A chair of weight 150 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 36.0 directed at an angle of 40.0 below the horizontal and the chair slides along the floor.Using Newton's laws, calculate , the magnitude of the ...
December 14, 2009

physics
A chair of weight 150 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 36.0 directed at an angle of 40.0 below the horizontal and the chair slides along the floor.Using Newton's laws, calculate , the magnitude of the ...
December 14, 2009

algebra
Thanks for this...I am so confused on it?!?
December 9, 2009

algebra
Thank you, but how does the x play into it,that is where I was confused at?
December 9, 2009

algebra
find the slope: x+5y=10
December 9, 2009

algebra
Thanks, I got it.
December 7, 2009

algebra
how do I do that?
December 7, 2009

algebra
a roof rise 2.7 feet vertically and 8.2 feet horizonatally. what is the grade of the roof?
December 7, 2009

algebra
Thank you!
December 7, 2009

algebra
find the slope for 8x-y=8
December 7, 2009

math
don't no
November 17, 2009

Misc.
What is the penultimate day of the year? Dec. 30th?
November 13, 2009

Math-Probability
Thank you, that helped out a lot!
November 12, 2009

Math-Probability
A deli offers its cheese sandwich with various combinations of mayonnaise, lettuce, tomatoes, pickles, and sprouts. 8 types of cheese are available. How many different cheese sandwiches are possible?
November 12, 2009

math
this fraction as an equivilent fraction in its lowest term 42 over 105
November 11, 2009

History
How did human history in North America during the period described in the Prologue differ from the events of Asia, Eurasia,
November 6, 2009

MGMT/216
What do you consider to be a source of ethics? What environmental factors contribute to ethical behavior? How are business ethics developed? Explain your answer
November 4, 2009

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