Monday
September 1, 2014

Posts by Chris


Total # Posts: 2,167

science(physics)
two perons watch the sameobject move marty says it accleartes downward but joanne clams it falls along a curved path describe the condtions under which each person would be reporting correclty what they see.
March 31, 2011

science(physics)
give an example of projectile motion;include in your explantion the term velocity , accleration and displacement orginality in your example will be appreciated?
March 31, 2011

MATH
A DICTIONARY,CUBE AND A GEOBOARD IS MEASURED BY GRAMS OR KILOGRAMS
March 30, 2011

MATH
KILOGRAM
March 30, 2011

MATH
A JUMPROPE IS MEASURED BY GRAMS OR KILOGRAMS
March 30, 2011

chemistry
the following reaction is endothermic; 3O2(g) = 2O3(g) If this reation is at equilibrium will it shift to the right or left if we: 1) add some oxygen
March 30, 2011

Math
A rope 3/4 yard long is cut into 9 pieces. Each piece is the same length. how long is each piece?
March 28, 2011

Geometry
The geometric figure that encloses the most area is a circle. A circumference C=100=2pi r so r=15.92 and Area = pi r^2 = 795.77 Your rectangle of 40*10 = only 400 sq. ft. A perimeter of 25 feet per side times 4 sides = a length of rope 100 ...
March 27, 2011

US History
Read your textbook, & you will find all of your answers.
March 23, 2011

US government
James Madison warned people about the dangers of this conflicting group. Today it is known as an interest group
March 21, 2011

chemistry
In order to dilute 1L of 6M solution of NaOH to .5M solution, how much water must be added?
March 17, 2011

Chemistry
what is the Molecular equation for the preparation of tetra-aminocopper(II)sulfate hydrate - Cu(NH3)4SO4*H20 in the experiment CuSO4*5H20 was added to water and then ammonia solution was added to that. and then after that was all stirred up nicely 95% ethanol was added to the ...
March 16, 2011

Physics
A clerk moves a box of cans down an aisle by pulling on a strap attached to the box. The clerk pulls with a force of 174.0 N at an angle of 27.0 degrees with the horizontal. The box has a mass of 39.0 kg, and the coefficient of kinetic friction between the box and floor is 0....
March 15, 2011

math
100- 4 Px + Py +40 = 0 100- 4 Py + Px +40 = 0 Solve the above two equations to get Py = Px = 140/3. How would you solve the two eq above??
March 14, 2011

calculus
The voltage of the power supply in a AC-DC coupled circuit is given by the function v(t) = 130sin5t + 18, where t is time, in seconds, and V is the voltage, in volts, at time t. a) find the maxiumum and mimimum voltages and the times at which they occur
March 11, 2011

calculus
what is the derivative of: V(t) = 130sin5t + 18
March 11, 2011

Chemistry
Why is potassium hydrogen phthalate (KHP) a primary standard but sodium hydroxide is not?
March 9, 2011

Calculus
how do I solve for t when i am given: 5000 = 45t^2 + 240t + 450
March 7, 2011

algebra
A triangle has sides of lengths 20, 28, and 32. A similiar triangle has a side of length 15 and another of length 24. How long is the third side of this triangle?
March 5, 2011

Calculus 1
find the point on the graph of y=x^2 where the tangent line is parallel to the line 2x-y=2
March 5, 2011

math
720/36=20 sq. in. Let's say the original painting was 24x30" 24/6=4 30/6=5 4*5=20 sq. in., so the answer checks out!!
March 4, 2011

College Alegbra
Thanks for the help.
March 3, 2011

College Alegbra
1/4,16
March 3, 2011

College Alegbra
Solve: 2x-9√x +4=0
March 3, 2011

math
Explain vertices and edges
March 2, 2011

math
Explain vertices and edges
March 2, 2011

microeconomics
lol mayybe... did you get the answer?
March 2, 2011

microeconomics
Consider the markets for pizza and fried chicken. Show graphically and explain the impact(s) you would expect if technological change leads to the development of a pizza oven that is both much cheaper and uses less energy than current ovens.
March 2, 2011

microeconomics
What condition must be met in order to conclude that an economy is maximizing social well-being? Do the equilibriums given by individual markets necessarily lead to the maximization of social well-being (that is, if demand is equal to supply, can you conclude that well-being ...
March 2, 2011

7th grade math
x-14=-3 one step equation
March 2, 2011

math
Use integration by parts to verify |(from -pi to +pi)cosmxcosnxdx = pi when m=n and |(from -pi to +pi)cosmxcosnxdx = 0 when m and n are not equal.
March 2, 2011

math
integration of x^2 * cos^2(x)
February 27, 2011

Chemistry
Which of the following aqueous solutions are good buffer systems ? . 0.26 M hydrochloric acid + 0.24 M potassium chloride . 0.14 M acetic acid + 0.20 M potassium acetate . 0.16 M potassium hypochlorite + 0.23 M hypochlorous acid . 0.31 M hydrocyanic acid + 0.28 M potassium ...
February 26, 2011

Math
Write 1.87 as a mix number
February 24, 2011

Business Communication
I agree
February 24, 2011

physical science
If 22 grams of water are saturated at 75 degrees celsius with potassium nitrate and then cooled to 40 degrees celsius, how much will precipitate?
February 21, 2011

Calculus II
Find the volume of the solid formed by rotating the region enclosed by x=0, x=1, y=0,y= 6 +x^{8} about the y-axis.
February 20, 2011

algebra
Mat116 appendix F problem #2 2. As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. a. The sales representative here tells you they also have two floor plans available, but they ...
February 16, 2011

chemistry
A sample containing 0.0500mol of Fe2(SO4)3 is dissolved in enough water to make 1.00L of solution. This solution contains hydrated SO4 2- and Fe(H2O)6 3+ ions. The latter behaves as an acid: Fe(H2O)6 3+ --> Fe(H2O)5OH 2+ + H+ a) Calculate the expected osmotic pressure of ...
February 16, 2011

physics lab
Consider different points along one spoke of a wheel rotating with constant angular velocity. Which of the following is true regarding the centripetal acceleration at a particular instant of time? A The magnitude of the centripetal acceleration is greater for points on the ...
February 16, 2011

English
1.It was so cold that the water in the fountain had _____. (freeze) 2.Masato's bike has _____ on the sidewalk all day. (lie) 3.Shelia has never ____ a mountain bike. (ride) 4.Last sprin Urbi and Joe _____ every morning. (swam) 5.Has the rider been _____ off the horse?(...
February 14, 2011

8th Grade Probability
12/5
February 14, 2011

Math
Factor Completey: f(x)= x^7 +2x^6 -8x^5 -10x^4 +19x^3 +8x^2 -12x
February 14, 2011

algebra
Why does the inequality sign change when both sides ar multiplied or divided by a negative number?
February 9, 2011

statistics
76% of toddlers get their immunization. Suppose that 6 toddlers are selected at random. What is the probability that at least one has not received the recommended immunization?
February 8, 2011

Physics
zero work, no force in direction of motion
February 7, 2011

Energy and momentum Physics
two cars, one with mass m1=1000kg and the other with mass m2= 4000kg crash in an intersection. Before the crash, car m1 was headed east with a speed of v1i= 25 m/s and the car m2 was headed north with a speed of v2i= 10m/s. After the crash, the cars stick together. what is the...
February 3, 2011

Math
That was a huge help. Thank you!!!
February 3, 2011

Math
Karen can be paid in one of two ways for selling insurance policies: Plan A:A salary of $750 per month, plus a commission of 10% of sales. Plan B:A salary of $1000 per month, plus a commission of 8% of sales in excess of $2000. For what amount of monthly sales is plan A better...
February 3, 2011

essay writing
rong i put that as my answer and it was rong
February 3, 2011

Math
Could someone please help me solve this problem, the age numbers that I am working with are 10yrs old 55yrs old and 75yrs. old. I need to know at my age of 55, in years, how old was the older person of 75 when I was born? Could you please write an equation that models how old ...
February 3, 2011

math
actually dont answer that im stupid. i hand by calculator in rad rather than deg. sorry. have a great rest of the day.
February 3, 2011

math
a boy walks 50m from the bottom of a building lies down and notes that he has to raise his eyes through 42 degree from the horizontal. what is the height of the building? i am doing tan(42)=x/50 but the answer is supposed to be 45m. how do i get that?
February 3, 2011

algebra
-7x-22=-24 1/3 could someone help me Im confussed
February 1, 2011

us history
what issues did the compromise of 1850 leave unsettled
January 26, 2011

please help me paraphrase
"The truth is that the reader is always right. Chances are, if something you’re reading doesn’t make sense, it’s not your fault—it’s the writer’s. And if something you write doesn’t get your point across, it’s probably not the ...
January 25, 2011

Biology
Thank you so much! I will check with my teacher tomorrow. That's what i though it would be but wasn't sure. Thanks again!
January 23, 2011

math
radius of 4 centimeters and length of 12 centimeters, how many cubic centimeters?
January 23, 2011

math
a bag contains 12 black checkers and 12 red checkers. What is the probability of choosing two red checkers?
January 23, 2011

Chemistry
thank you so very much this helped so much!!!!!
January 23, 2011

Chemistry
What is the pH of a one liter auqueous solution to which has been added 0.2 moles of acetic acid (CH3COOH)?
January 23, 2011

5th grade
Easily done the mode is 600 b/c the mode is the most #'s in the sequence
January 20, 2011

physicis
what action on our part is neccesary to make the dryiceblock move faster and faster,that is accelerate continuosly?if you are speeding it up, how must you move?
January 20, 2011

physicis
suppose the dry ice block is moving to begin with and we exert a steady force,either speeding up or slowing down.how does the block behave? now suppose we make the steady force smaller and smaller.how does the dryice block behave? how will it behave when the force we are ...
January 20, 2011

physicis
What is dry ice behavior when acted on by a steady push that keeps up with the block and when it is a given a quick shove.
January 20, 2011

trig
i have to find a & c, b=2.489*10 to the nineth power and i have one degree 25
January 18, 2011

thermodynamic
A heat pump is proposed that uses 50 degree F ground water to heat a house to 70 Degree F. The groundwater experiences a temperature drop of 12 degree F. If the house require 75,000 Btu/hr, Calculate the minimum mass flux of the groundwater and minimum HP required for the pump.
January 16, 2011

thermodynamic
Calculate the work necessary to compress air in an isolated cylinder with initial and final volumes of 6.0 and 1.2 ft^3, respectively. The initial pressure and temperature are 30.0 psia and 50 degree F, respectively.
January 15, 2011

thermodynamic
An air tank with a volume of 20m^3 is pressurized to 10 MPa. The tank eventually reaches room temperature of 25 degree C. If the air inside is allowed to escape without any heat transfer to the environment unit reaches a pressure of 200 KLPa, find the remaining mass of air in ...
January 15, 2011

Early ed
The most important consideration when installing playground equipment is? A. Cost B.height C.finishing materials D. Surface materials
January 12, 2011

Conductivity
I still don't understand. Can someone help, and elaborate more?
January 12, 2011

Trigonometry
If log base 9 of 2 = 3x+1, find x to the nearest tenth.
January 12, 2011

algebra
simplified x/2-1/3=1/2
January 12, 2011

Algebra 2
10x+ (x^2) = 42
January 10, 2011

Math
Paul's car is 14 feet long. Paul is making a model of his car that is the actual size. Which proportion should be used to find the length, L, of Paul's model?
January 10, 2011

Thermodynamic
One Kg steam with a quality of 0.2 is heated in a piston / cylinder vessel at a constant pressure of 200 KPa unit the temperature reaches 400 degree C. calculate the work done by the steam.
January 10, 2011

Thermodynamic
N2 is described by its state properties of temperature @ - 100 Degree C, and pressure @10.0 MPa. Determine if it is reasonable to assume that the given substance behaves as an ideal gas at the specified state. If the substance is determined as a real gas or non-ideal substance...
January 10, 2011

MATH!! probability
Two cards are drawn without replacement from a deck of 52 cards. Determine P(A and B) where A : the first card is a spade B: the second card is a face card please help!!
January 9, 2011

thermodynamic
The air 10 cm diameter cylinder, as shown below, is heated until the spring is compressed 50mm. Find the work done by the air on the frictionless piston. The spring as the beginning of this process has a displacement of 0.0m with a spring constant of K=10KN/m. (assume Patm=101...
January 9, 2011

accounting
What potential problems can arise if a company incorrectly classifies costs? Example, what if an inventoriable cost is classified as a period cost?
January 9, 2011

thermodynamic
The air 10 cm diameter cylinder, as shown below, is heated until the spring is compressed 50mm. Find the work done by the air on the frictionless piston. The spring as the beginning of this process has a displacement of 0.0m with a spring constant of K=10KN/m. (assume Patm=101...
January 9, 2011

thermodynamic
Energy is added to a piston-cylinder arrangement. The piston is withdrawn in such a way that the temperature remains constant. The initial pressure and volume are 200 KPa and 2m^3, respectively. If the final pressure is 100 KPa, determine the work done by the ideal gas on the ...
January 9, 2011

Physics
The mass of the hockey puck is 185 grams. When you said time = distance/average speed stopping, in the equation F = m (46.473)*(23.236/.0439), did you mean this, .0439/23.236.
January 8, 2011

Physics
A player strikes a hockey puck giving it a velocity of 47.673 m/s. The puck slides across the ice for 0.175 s after which time its velocity is 46.473 m/s. The acceleration of gravity is 9.8 m/s2 . If the puck strikes the goalie’s pads and stops in a distance of 4.39 cm, ...
January 8, 2011

thermodynamic
N2 is described by its state properties of temperature @ -100 degree C, and Pressure @ 10.0 MPa. Determine if it is reasonable to assume that the given substances behaves as a real or non-ideal substance determine its compressibility factory Z.
January 8, 2011

thermodynamice
A cylinder contain 3 kg of water and water vapor mixture in equilibrium at a pressure of 500 KN/m^2. If the volume of the cylinder is 1.0 m^3, calculate the following. A)temperature of the mixture B) the volume and mass of the liquid C)The volume and mass of the vapor
January 8, 2011

Physics
You are driving at the speed of 33.4 m/s (74.7296 mph) when suddenly the car in front of you (previously traveling at the same speed) brakes. Considering an average human reaction, you press your brakes 0.484 s later. Assume that the brakes on both cars are fully engaged and ...
January 8, 2011

Physics
You are driving at the speed of 33.4 m/s (74.7296 mph) when suddenly the car in front of you (previously traveling at the same speed) brakes. Considering an average human reaction, you press your brakes 0.484 s later. Assume that the brakes on both cars are fully engaged and ...
January 8, 2011

english
I need help determining the key differences between the four types of writing (summary, analysis, synthesis and evaluation).
January 8, 2011

7th grade math
6+x=2x-14 -x = -x 6=x-14 6+14=+14 20=x
January 6, 2011

Science
what forces would be at work if you were trying to move a 20,000kg block of stone? Withoust using a cart or truck, how could you move the stone?
January 5, 2011

English 1
Underline the correct pronoun of each pair in parentheses. 1. Women (who, whom) raise families do as much work at home as at their jobs. Whom 2. In North America society, it is still mainly women (who, whom) cook dinner, clean the house, check the children’s homework, ...
January 4, 2011

geometry
If the smaller leg of a 30-60-90 triangle is 4 m, what are the lengths of the longer leg and the hypotenuse?
January 2, 2011

English 1
Revise the mixed sentences so that the beginning of each sentence fits logically with its end. If sentence is correct cirle it. 4. While following an object with her eyes is when eye coordination develops When following an object with her eyes is when eye coordination ...
December 31, 2010

English 1
Revise the mixed sentences so that the beginning of each sentence fits logically with its end. If sentence is correct cirle it. 1. By showing babies plain, black-and-white images will help them learn to recognize shapes and focus their vision. Showing babies plain, black-...
December 31, 2010

English 1
Revise the mixed sentences so that the beginning of each sentence fits logically with its end. If sentence is correct cirle it. 1. By showing babies plain, black-and-white images will help them learn to recognize shapes and focus their vision. 2. Babies can see their parents&#...
December 31, 2010

English (Shifting and mixed sentences)
1. By showing babies plain, black-and-white images will help them learn to recognize shapes and focus their vision. 2. Babies can see their parents’ faces but will not respond with a smile until they are a few weeks old. 3. Babies may gaze intently into a small, ...
December 30, 2010

English 1
Through changing his facial expression indicates he may find a particular sound soothing or comforting.
December 30, 2010

5th grade
divide 6358 by 100
December 27, 2010

pre calculus
Write the trigonometric expression in terms of sine and cosine, and then simplify. cot(x)/csc(x)-sin(x)
December 16, 2010

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