Thursday
October 23, 2014

Posts by bruce


Total # Posts: 92

MATH
WHAT DOES THIS SERVICE COST?
February 19, 2014

MATH TUTOR
HOW MUCH IS YOUR SERVICE?
February 19, 2014

Calc 2
What is the lim of the square root of x times sin of (1/x) as x approaches infinity
February 19, 2014

Environmental Engineering
The EPA requires hazardous waste incinerators to meet a standard of 99.99% destruction and removal of hazardous constituents injected into the incinerator. Determine the allowable quantity of contaminant in the exit stream if the incinerator is burning 1.0000 g/s of hazardous ...
January 15, 2014

chemistry
Thank you for your help! For part c, I'm not sure what you mean finding Na from NO3^-?
January 13, 2014

chemistry
You are tasked with preparing a 500mL nutrient solution containing 5mg/L of phosphorous (P), 3mg/L nitrate (NO3 -) and 100 mg/L chloride (Cl-). To make this solution, you have powdered sodium chloride, a 100 mg/L solution of phosphorus, a 1000 mg/L of sodium nitrate (NaNO3) ...
January 13, 2014

Math
what is the present value of $329 a year for 6 years at a 12 percent discount rate?
June 17, 2013

Math
12 years at 5% compounded annually what is the future value of $557?
June 17, 2013

stat
When rolling a die, is this an example of a discrete or continuous random variable?
June 17, 2013

science
At time t =0, the current to the dc motor is reversed, resulting in an angular displacement of the motor shaft given by è = (198 rad/s)t – (24 rad/s2)t2 – (2 rad/s3)t3 (15 marks) a. At what time is the angular velocity of the motor shaft zero? b. Calculate the...
April 27, 2013

physics
2. At time t =0, the current to the dc motor is reversed, resulting in an angular displacement of the motor shaft given by θ = (198 rad/s)t – (24 rad/s2)t2 – (2 rad/s3)t3 a. At what time is the angular velocity of the motor shaft zero? b. Calculate the angular ...
April 27, 2013

life orientation
Identify one human factor that causes ill health;accident and disaster.
April 18, 2013

math
The variance of the standard normal distribution is equal to
April 11, 2013

math
If the highest score is100 and the average score for12 students is 95. What is the lowest score in order to get the average of 95?
February 5, 2013

Physics
The electric field intensity at a point 2 meters from the surface of a uniformly charged conducting sphere is 1920 N/C. At a point 4 meters from its center, the electric field intensity is 3000 N/C. a.) Determine the radius of the sphere. Determine the electric field intensity...
February 4, 2013

Physics
The intensity of the light isn't halved after it passes through each filter? Thats what I don't understand. Thank you for your help!
December 12, 2012

Physics
There are two polarizing filters that are out of alignment by 30 degrees. If the light of intensity 1.00 W/m^2 and initially polarized half-way between the two filters passes through the two filters, what is the intensity of the transmitted light? I know the answer is 0.700 W/...
December 12, 2012

hvac school
What temp would a fixed volume of gas need to be heated in order to double its pressure if it starts out at 25?
November 30, 2012

Physics
thank you!
October 24, 2012

Physics
A fully charged 90-µF capacitor is discharged through a 60-Ω resistor. How long will it take for the capacitor to lose 80% of its initial energy? I know energy is given by E(t)=q(t)^2, but beyond that I really don't know how to solve this. Any suggestions are ...
October 24, 2012

Physics
Thamk you for your help.
September 19, 2012

Physics
A beam of X-rays with a wavelength Ć of 0.179nm is directed at an iron crystal whose planes have a spacing of 0.1013nm. How many diffraction peaks (each arising from a different order n) are possible? I'm really not sure how to go about solving this. Any help is...
September 19, 2012

science
What cellular structures must an angiosperm have to survive?
August 28, 2012

ALGEBRA
1.2G DIVIDED BY 3CM TO THE THIRD POWER
August 26, 2012

physics
thank you for your help!
July 23, 2012

physics
The label on a soft drink states that 11 fl. oz (325 g) provides 285 kcal. The drink is cooled to 12.0°C before it is consumed. It then reaches body temperature of 37°C. Find the net energy content of the drink. (Hint: You can treat the soft drink as being identical to...
July 23, 2012

physics
thank you!
July 20, 2012

physics
A uniform brass disk of radius R and mass M with a moment of inertia I about its cylindrical axis of symmetry is at a temperature T = 45 °C. Determine the fractional change in its moment of inertia if it is heated to a temperature of 125 °C. (The linear expansion ...
July 20, 2012

Physics
thank you very much!
July 17, 2012

Physics
A sinusoidal wave traveling on a string is moving in the positive x-direction. The wave has a wavelength of 8 m, a frequency of 60 Hz, and an amplitude of 9 cm. What is the wave function for this wave? (Use any variable or symbol stated above as necessary.) I think the ...
July 17, 2012

Physics
A particular steel guitar string has mass per unit length of 1.79 g/m. and tension of 61.9 N. For the wave speed to be increased by 1.9%, how much should the tension be changed? I tried increasing the wave speed (186 m/s) by 1.9%, plug that into v=sqrt(T/linear mass density), ...
July 17, 2012

Physics
Thank you so much for your help!
July 13, 2012

Physics
A mass m = 13 kg is connected to two different springs, one on the left and another on the right. It is displaced a distance x to the right from its equilibrium position. (Take k1 = 115 N/m and k2 = 198 N/m.) (a) What is the net force acting on the mass? (Use any variable or ...
July 13, 2012

Physics
Thank you for your help!
July 13, 2012

Physics
The motion of a block-spring system is described by x(t) = A sin(ùt). Find ù, if the potential energy equals the kinetic energy at t = 6.11 s. I'm really not sure how to solve this. It seems that you need more information, either x or A? I appreciate any help...
July 13, 2012

Physics
A 3-kg mass attached to a spring with k = 130 N/m is oscillating in a vat of oil, which damps the oscillations. (a) If the damping constant of the oil is b = 19 kg/s, how long will it take the amplitude of the oscillations to decrease to 1% of its original value? (b) What ...
July 12, 2012

Engineering
A certain OTA with a transconductance of 5000 µS has a load resistance of 10 kÙ. If the input voltage is 100 mV, what is the output current? What is the output voltage?
April 5, 2012

math
Unless your teacher gives you 5700 as the half life.
April 4, 2012

Chemistry
In reality you probably could, however it is not good science as it has been considered to be contamined or already used and a new substance or solution should be obtained. I know this is wasteful but, that is just how it is.
March 11, 2012

Chemistry
I got 0.02 g is this right?
March 11, 2012

Chemistry
just steps is all i really need i think i need the molecular weights first then just simple molarity am i correct?
March 11, 2012

Chemistry
Calculate the amount of Na2HPO4*7H2O in grams needed to make 50 mL of a 0.40 M solution. I think this is dealing with molarity but i cant figure it all out for some reason? Help would be greatly appreciated.
March 11, 2012

Maths
N+10N=0
February 2, 2012

algebra
Writ an algebric expression for this statement.Ama is N year old now.How old will she be in 10 years.
February 2, 2012

Physics
The initial velocity of a 2.04 kg block sliding down a frictionless inclined plane is found to be 1.24 m/s. Then 1.23 s later, it has a velocity of 6.70 m/s. What is the angle of the plane with respect to the horizontal? im lost.....
January 30, 2012

physics
An 88kg fisherman jumps from a dock into a 131kg rowboat at rest on the west side of the dock. If the velocity of the fisherman is 4.7m/s to the west as he leaves the dock, what is the final velocity of the fisherman and the boat. East is positive.
January 16, 2012

math
In a triangle, between J and K is 30in and between J and L is 25 degree, what is the measure of <K ?
December 7, 2011

Trig!
Sin2x
September 27, 2011

Math
16/19. Cant be reduced anymore.
August 18, 2011

Math
17/21. You take away the negative. (Only in some cases though)
August 18, 2011

geometry
A rectangular prism has dimensions of x + 1, x - 1, and x. Write an expression for the total volume of the prism.
June 10, 2011

statistics
) If this data were normally distributed, determine the probability that the sample mean would be as far away from the population mean or more so
April 17, 2011

Chemistry
How many mL of 1.211 Molarity sulfuric acid is required to completely neutralize 10.0 mL of 3.210 Molarity calcium hydroxide?
March 23, 2011

Chemistry
Give the molecular, complete ionic, and net ionic equations for the reaction of ammonia with hydrochloric acid.
March 23, 2011

Chemistry
Give the molecular, complete ionic, and net ionic equations for the reaction of sulfuric acid and barium hydroxide.
March 23, 2011

Chemistry
What is the concentration of an acetic acid solution if 11.2 mL of 1.002 Molarity sodium hydroxide solution is needed to completely neutralize 5.1 mL of the acid?
March 23, 2011

Chemistry
How many grams of water are produced from the reaction of 1L of 2 molarity hydrochloric acid with 1L of 2 Molarity barium hydroxide?
March 23, 2011

Chemistry
Give the molecular, complete ionic, and net ionic equations for the reaction of phosphoric acid and magnesium carbonate.
March 23, 2011

Chemistry
According to the Bronsted-Lowry definition of acids and bases, is water an acid or base? Provide examples to support.
March 23, 2011

Chemistry
Give the molecular, complete ionic, and net ionic equations for the combination of potassium chloride and magnesium sulfate.
March 23, 2011

Chemistry
Is it possible to have an acid/base reaction and produce a precipitate as a product as well? If yes, provide an example.
March 23, 2011

Chemistry
Does the mixing of copper (I) nitrate with sodium iodide produce a precipitate? If so, give the molecular equation.
March 23, 2011

Chemistry
Give the molecular, complete ionic, and net ionic equations for the reaction of barium nitrate and sodium sulfate.
March 23, 2011

Chemistry
Most chlorides are soluble in water. Give all of the formulae for the insoluble chlorides.
March 23, 2011

algebra
(5ay)exponent 3
February 28, 2011

science
Calculate the pH of a solution created by mixing 200.0 mL of 0.400 M acetic acid and 200.0 mL of 1.00 M sodium acetate. Hint: The instant the two solutions are mixed what are the initial concentrations of each?
February 14, 2011

algebra
Is (3, 2) a solution to this system of equations? 8x + 7y = 37 2y = 4x - 2 (duh...a+ yes
February 2, 2011

math
Billy has a bag of candy that contains 13 red pieces, 9 green pieces, 3 yellow pieces, and 7 orange pieces. If Billy reaches into the bag without looking, what color is he least likely to get?
January 9, 2011

Pre-Calculus
.  Margaret is planning to invest up to $22,000 in certificates of deposit at City Bank and People’s Bank.  She wants to invest at least $2,000 but no more than $14,000 at City Bank.  People’s Bank does not insure more than a $15,000 investment, so she...
December 2, 2010

Math
A point is sliding along a curve y^2 = 1 + cos^3(2x) at whatever speed (even depending on time). Compute the ratio of the rates of change of the vertical and horizontal coordinate with respect to time when the point is at (x, y).
November 12, 2010

4th grade math
62
October 29, 2010

Chemistry
A 325.0-g piece of gold at 427°C is dropped into 200.0 g of water at 22.0°C. (The specific heat of gold is 0.131 J/g°C.) Calculate the final temperature of the mixture. (Assume no heat loss to the surroundings.) Can you please outline step by step how i would ...
October 22, 2010

college algebra
What is 1.7^0.3326 = ?
September 12, 2010

chemistry
M=3.65*10^-5
June 25, 2010

critical thinking
How can I apply critical thinking when evaluating, articles, advertising, media and conversations?
October 9, 2009

alcohool beverages
alcohool beverages
August 24, 2009

The Gourmet Kitchen
the Gourmet Kitchen
August 24, 2009

pre- algebra
3x = 21 3x/3 = 21/3 x=7
July 19, 2009

social study
Complete a venn digram to compare and contrast
August 21, 2008

Social Study
two views of reconstruction
August 21, 2008

english
what shows phillip prejudice?
April 28, 2008

grammar
i need help with this subject
February 4, 2008

Ethics
Are fetal-protection policies discriminatory? Why?
November 17, 2007

Algebra
I cannot seem to work this problem out correctly as all answers found do not make the equation work. 1/4 - 2/3y = 3/4 - 1/3y
October 3, 2007

science
thank you
October 1, 2007

science
I have not selected a region or its possible enviormental problems. You can chose any region you like along with its environmental problems. I would really appreciate an example answer.
October 1, 2007

science
select one region of the world and identify at least two serious environmental problems, such as soil degradation, air or water pollution, pesticide misuse, overpopulation, wildlife extinction or threatened biodiversity, and deforestation, that impact this region. What seem to...
October 1, 2007

history
was adolf hitler a leader? http://www.historyplace.com/worldwar2/riseofhitler/index.htm Yes, of the German people after their dissatisfaction with the outcome of the Great War. Here are other links: http://www.google.com/search?q=adolf+hitler&rls=com.microsoft:en-us:IE-...
March 18, 2007

budgeting
Given the following information, construct a program budget. Allocate nonsalary costs on the basis of the relative number of positions in each program. Note: The dispatchers and prevention inspectors report to the chief. Average Total Position Number Salary per Position Chief...
March 18, 2007

Science
Can you help with this one please? A drop of oil (vol 0.05cm^3) is released on to a calm surface of a pond where it spreads out and covers an area of 40 cm^2. Assume the oil film has uniform thickness equal to the diameter of an oil molecule. Calculate the diameter of an oil ...
February 5, 2007

social studies
You are all wrong!!
November 16, 2006

ethics
Do you favor at will employment?
November 10, 2006

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