Sunday
April 20, 2014

Posts by Chris


Total # Posts: 2,095

Calculus
Gas is escaping a round balloon at2units^2/min.How fast is the surface area shrinking when the radius is 12units?

physics
A mass of 0.116 kg hangs from a vertical spring in the lab room. You pull down on the mass and throw it vertically downward. The speed of the mass just after leaving your hand is 5.60 m/s. (a) While the mass moves downward a distance of 0.04 m, how much work was done on the ma...

Math
You are given 9 to 1 odds against tossing three heads with three coins, meaning you win $9 if you succeed and you lose $1 if you fail. (Find the expected value of the described game. Would you expect to win or lose money in 1 game? in 100 games? Explain.

chemistry
i am just simply stuck on this question

chemistry
Decide if each of the following principles were first discovered during Thompson's cathode ray tube experiments, Rutherford's gold foil experiment, Millikan's oil drop experiment or none of these. Label each one with either Thompson, Rutherford, Milikan, or none of...

Math
hfg

math
5/6 of 60 minutes is 50 minutes. 1/3 of 50 minutes is 1/6 of 100 minutes, or 16.66 minutes... the devil's 666 is in there lurking! Here's a question for you: If I add 5 + 5/4 do I get the same amount or answer as when I mul...

Maths
Solve the initial value problem (dy/dt)+2y=15 sin(t)+15 cos(t) with y(0)=3

Maths
Solve the initial value problem (dx/dt)+2x=cos(2t) with x(0)=5

alegbra
How does the number game work. How does the number game use the skill of simplifying rational expressions?

chemistry
first convert the kg of SO2 to grams of SO2 then convert to moles by dividing by its molar mass secondly convert between moles of 2SO2 and 2CaSO4 which is a 2/2 ration so no change in moles then multiply your moles by CaSO4's molar mass to get grams, then multiply that amo...

math
The weekly take-home pay (in dollars) for 20 graduate teaching assistants at University Z is as follows: 500.75,217.43,488.25,405.78 485.46,495.48,370.75,435.40 479.65,482.56,470.28,489.90 382.50,500.75,465.32,481.25 506.43,225.50,504.38,179.25 Find the mean,median, and midran...

Chemistry
How much heat (in kilojoules) is evolved or absorbed in the reaction of 2.90g of Fe2O3 with enough carbon monoxide to produce iron metal? Fe2O3 + 3CO ---> 2Fe + 3CO2 dH=-24.8kJ How do you find q (of the 2Fe in kJ).

Math
4z3(3z-1)+7(3z-1)

Chemistry
If a 25.0 mL sample of 0.500 M HCl solution were diluted 125-fold, what would be the volume and concentration of the diluted solution?

grammar
Yes! Okay... I am really going to try that. Thank you for boosting my brain :)

grammar
Can someone please help me in figuring out how to write adjectives and adverbs in a sentence. I do not know why this is so difficult for me.... I know what each means, yet I am having trouble identifying them in sentences. Any advice is appreciated :\

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

physics urgent please
Give an example of projectile motion;include in your explantion the term "velocity" , "accleration" and "displacement", orginality in your example will be appreciated?

physics
Two person watch the same object move.Marty says it accelerates straight up downward,but joanne claims it falls along a curved path.describe the conditions under which each person would be reporting correctly what they see. sorry for my mistakes can you please answer it ms.sue

science(physics)
Two person watch the same object move.Marty says it accelerates straight up downward,but joanne claims it falls along a curved path.describe the conditions under which each person would be reporting correctly what they see. sorry for my mistakes can you please answer it

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.

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?

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

MATH
KILOGRAM

MATH
A JUMPROPE IS MEASURED BY GRAMS OR KILOGRAMS

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

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

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 f...

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

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

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

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 ...

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 0.5...

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??

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

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

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

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

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?

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

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!!

College Alegbra
Thanks for the help.

College Alegbra
1/4,16

College Alegbra
Solve: 2x-9√x +4=0

math
Explain vertices and edges

math
Explain vertices and edges

microeconomics
lol mayybe... did you get the answer?

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.

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 i...

7th grade math
x-14=-3 one step equation

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.

math
integration of x^2 * cos^2(x)

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 cya...

Math
Write 1.87 as a mix number

Business Communication
I agree

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?

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.

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 o...

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 th...

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 spo...

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?(thro...

8th Grade Probability
12/5

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

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

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?

Physics
zero work, no force in direction of motion

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...

Math
That was a huge help. Thank you!!!

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...

essay writing
rong i put that as my answer and it was rong

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 ...

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

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?

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

us history
what issues did the compromise of 1850 leave unsettled

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 reade...

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!

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

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

Chemistry
thank you so very much this helped so much!!!!!

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

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

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?

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 exert...

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.

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

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.

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.

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 ...

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

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

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

algebra
simplified x/2-1/3=1/2

Algebra 2
10x+ (x^2) = 42

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?

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.

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...

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!!

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...

Pages: <<Prev | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | Next>>

Search
Members