Saturday
July 30, 2016

Posts by john

Total # Posts: 7,841

Chemistry
We did an experiment where we had to figure out the amount of water molecules in CuSO4xH2O (x being the value to find). If the stirring rod used was wet and was used to stir the beaker would this result in a higher x value? Is this a experimental or human error. Obviously this...
April 20, 2016

Physics
a 2x10^-6 point charge travels a distance of.002m between two parallel charged plates from the negative end toward the positive end. The field has a strength of 500 N/C What is the change in voltage?
April 20, 2016

child development
the continues development views hold that
April 19, 2016

Physics
An electric field measured near a point charge of 3.0 X 10^-6 C has a strength of 1.50 X 10^5 N/C How far is the point from the source charge
April 19, 2016

Health
The lungs are? A. Connected by the mediastinum B. Separated by the mediastinum C. Divided into 7 lobes D. Divided into 9 lobes C?
April 19, 2016

Physics
If one charge (+5 uC) is placed at origin and a second charge of (+7 uC) at x = 100 cm, then where can a third charge be placed and of what size, so that it has no electrostatic force on it. I know the magnitude of the force will not matter, however, I'm not sure as to how...
April 18, 2016

chemestry
0.63g of pb powder were disolved in excces nitrate(v) aci to forn leadnitrate solution, all the lead nitrate solution were reacted with sulphate,give the ion equationof the reaction between lead nitrate and sadium sulphate solution?determine the mass of the lead salt formed in...
April 16, 2016

calcus
water partially fills a hemispherical bowl of radius 40cm so that the depth of the water is 20 cms. write down an integral representing the volume of the water in the bowl
April 14, 2016

Dosage calculations - Bob, please help
Weight - 20 pounds 6 ounces Ordered dose - 1.5mg per kilogram per day recommended dosage from drug label - 3mg every 8 hours. 1.What is the individual dose? to find the individual dose i'll first convert pounds to kg which is 9.26 kg. I will then multiply 1.5 x 9.26 = 13....
April 13, 2016

Dosage calculations please
What is the maximum dose client could have? I would multiply the weight x the recommended dose which equals to 863.5 mL.
April 13, 2016

Dosage calculations please
Nurse orders 375mL every 8 hours, client weighs 38 pounds. Recommended dose is 50ml 1. pounds to kg -> 17.27 kg 2. individual dose is 17.27 x 375 = 6476.25 mL 3. Daily dose is 6476.25 x 3 because 24 hours divided by 8 = 3. therefore the daily dose is 19,428.75 mg. Is this ...
April 13, 2016

Dosage calculations please
Ahh and I would multiply 38 x 4 to get the daily dose because 24 hours/6 = 4 therefore the daily dose is 152mg
April 13, 2016

Dosage calculations please
The nurse is to administer the recommended dose of Garamycin 2 mg per kg every 6 hours. The child weighs 42 pounds. 1. What is the weight in kg? 2. what is the daily dose? Round to the nearest whole number. 3. What is the individual dose? 1. 42/2.2 = 19.09 2. daily dose = 19....
April 13, 2016

Maths Physocs
J and K are cycling together. K is riding a bike with a wheel radius of 35cm, crank wheel radius 11cm and chain wheel radius 4cm. She is pedalling at 60 rpm. How fast is she going? -->What is the significance of giving 3 different types of radius? --> know to find ...
April 12, 2016

Social Studies Please tell a summary
Can some one HELP!!!!! Select one form in movement from the progressive era. Provide details and examples that Sapor how this movement change South Carolina.
April 12, 2016

yakima community college
can't you just use the 5/9 celsius to fahrenheit conversion equation? Don't be lazy, just write down the formula and plug in the numbers where there are letters
April 11, 2016

help my son's math
Jamie = Antonio + 8 Antonio = 3 times Beth If Beth completed 6 then Antonio completed 18 Jamie completed 26
April 11, 2016

Math
This is a probability problem 5!/(3!2!) =10 different ways.
April 11, 2016

Health
The answer is not B
April 11, 2016

Health
What?
April 11, 2016

Health
The skin helps eliminate waste from the body through _____. A. Striation B. Respiration C. Irritation D. Perspiration B?
April 11, 2016

Please Help ! Calculus
x + y = 42 y = 42-x x(42-x) 42x-x^2 derivative 42 -2x =0 x=21 y =21
April 10, 2016

Geometry
An easier way would be to find the perpendicular and use pythag. Thm c^2 = a^2 + b^2 15^2 = 4^2 + b^2 b = 14.45 A = 1/2 bh A= 1/2 8 x 14.45 you will get the same answer as above. Depending on the level you are working at this might be what your teacher is looking for.
April 10, 2016

Math
I have 3 nickels, 1 quarter, and 1 penny in my pocket. If I pick out a coin from my pocket, do not replace it, then pick out a second coin from my pocket, what is the probability that the second coin that I pick out of my pocket is a nickel? So far I have come up with this: P(...
April 9, 2016

physics
Here is an equation called Coulomb's Law that might help you find the answers: Force of electricity= k x (q1 x q2)/r^2 k= Coulomb's constant= 9x10^9 q1= charge 1 q2= charge 2 r= distance between two charges Just plug in numbers to the equation and find the force. Then...
April 9, 2016

Pysics
Remember that the net momentum before a collision is equal to the net momentum after a collision. Let momentum= p, mass= m, and v= velocity. Even though a pound is not a measurement unit of mass, it is linearly correlated with it, so let's use pounds to measure measure ...
April 9, 2016

Biology
The cells in them are the ones that control them
April 9, 2016

Chemistry
what mass of hydrogen chloride gas is required to produce 250 ml of hydrochloric acid solution with a pH of 1.57
April 9, 2016

Chemistry
what mass of hydrogen chloride gas is required to produce 250 ml of hydrochloric acid solution with a pH of 1.57 pH 1.57 H3O = 10^-1.57= .027mol/L .027(4)= .108mol/L 36.46(.108)=3.9g
April 8, 2016

Algebra
A bottle rocket launches into the air. The equation h=-16t^2+64t+9 gives the height of the ball, h in feet, as a function of t, number of seconds after launch. What is the maximum height the ball reaches? How many seconds does it take the ball to reach that height?
April 8, 2016

Maths
2x^3 - 12x^2 - 32x
April 7, 2016

Dosage calculations please
Ordered: Tegretol 150 mg po BID Supplied: Tegretol 20 mg / tablet 1. How many tablets would you administer per dose? 2. How tablets would you administer per 24 hours? 1. 150/20 x 1 = 7.5 tablets per dose 2. 150mg/2 = x/24 =1,800 tablets ? I am very confused on second question.
April 6, 2016

Dosage calculations
I did this 0.5/ 100 x 1 = 0.005 but the answer is 1.5ml.
April 5, 2016

Dosage calculations
The physician ordered 0.5 mL of meperidine hydro chloride. The med's drug label reads 100mg/mL. The patient will receive __________? I have no idea how to do it please.
April 5, 2016

Math
The measures of the sides of a right triangle form an arithmetic sequence of common difference 2. What are these measures?
April 5, 2016

Chemistry
I'm stuck.
April 5, 2016

Chemistry
Also I found the Ksp values from my text. It says Pb = 2.53E–8 and Sr = 3.44E–7. Could you re-write with those values so that I can understand it better please? I really appreciate your help.
April 5, 2016

Chemistry
Hey Dr. Bob. I'm not sure where you got the 1.6E-8 from?
April 5, 2016

Chemistry
A solution contains 0.0390 M Pb2 (aq) and 0.0390 M Sr2 (aq). If we add SO42–(aq), what will be the concentration of Pb2 (aq) when SrSO4(s) begins to precipitate? I am just completely lost on this one.
April 5, 2016

math
The age of a man and his son adds up to 36years old.if the father is 30years more than his son .how old is the father and the son?
April 4, 2016

Statistics
A sign on the petrol pumps of a chain of petrol stations encourages customers to have their oil checked, claiming that one out of every four cars should have its oil topped up. Assuming this claim is true: (b) What is the probability that at least half of the next 10 cars ...
April 4, 2016

Business Statistics
(a) Of the next 10 cars entering a petrol station, what is the probability that exactly three of them should have their oil topped up?
April 4, 2016

History Help!
Is it d?
April 4, 2016

History Help!
It says that they wanted the rich land, but none of my answers relate to this. @Reed
April 4, 2016

History Help!
1.How did New England's textile industry affect women? -New technologies required men to work far from their wives and families -The jobs in this field were considered "mens work," and women were not hired -The need for unskilled labor provided low-paying factory...
April 4, 2016

chemistry
Given overall reaction: P4 + 10Cl2 ---> 4PCl5 Delta H for the reaction = ? PCl5 -----> PCl3 + Cl2 Delta H = +157 kJ P4 + 6Cl2 ----> 4PCl3 Delta H = -1207 kJ Calculate the Delta H for the overall reaction.
March 31, 2016

Physics-mechanics
A child's toy car runs off a battery that can supply 105 Wh of energy. If all losses (including friction) consume 45.0% of the energy available and the rider and car have a combined weight of 910 N, determine the height of the largest hill the child can climb in the car in...
March 29, 2016

algebra
I have a rectangular prism with a volume of 48 cubic feet and a height of 3/4 foot. The base of the rectangular prism is not a square and the width is greater than 2 feet. What is the length and width of the rectangular prism?
March 28, 2016

chemistry
Calculate the pH after addition of 16.36 mL of 0.1349 M HBr to 25.00 mL of 0.1444 M NH3. Kb(NH3) = 1.800e-5. Answer: 9.059 PLEASE SHOW STEPS!
March 27, 2016

math
The new capacity is 4+x=y Where x is the pure anti-freeze, y is the total capacity. 4+x=y 0.25(4)+x=0.5y 1+x=2+0.5x x=2 He needs to add 2 gallons of pure anti-freeze.
March 26, 2016

Math
f the air temperature at ground level is 90degrees°​F, the air temperature x miles high is given by ​T(x)equals=90minus−19x. Determine the altitudes at which the air temperature is from 52degrees°F to 42.5degrees°F.
March 25, 2016

statistics
what is the range of probability
March 24, 2016

Physics
Amotorvehicle of mass 1200kg is travelling along alevel road at 54km/hr.The breaks are then applied and the speed of the vehicle reduced to 18km/hr over adistance of 50M .if the afriction motion resistant is constant at 160N .calculate the effective braking force of the brakes...
March 24, 2016

Statistics
A flower shop wishes to add the valuable Waimea orchid to its product list. They purchase a large shipment of bulbs from a supplier in Kauai. It is established by Mendelian theory that the predominant colors in the Waimea orchid (blue, red, violet, orange) will occur with the ...
March 24, 2016

Statistics
A marketing researcher decides to test whether coffee drinkers have a favorable view of coffee labeled as “Fair Trade.” He has 15 randomly selected coffee drinkers taste his company’s Morning Blend, then the exact same coffee labeled Fair Trade Blend. They are ...
March 24, 2016

Chemistry
mols H2=1.106 mols I2=0.218 molar mass of H2=2.016 and divide 2.23g by 2.016 moles of H2 to moles of HI=2.212 moles of I2 to HI=0.436 so limiting reagent is I grams of HI=511.6 (2*255.8) percent yield=8.4% (43.1/511.6) What did I do wrong?
March 22, 2016

Chemistry
What is the percent yield of the reaction below if 2.23g of hydrogen gas react with 55.3 g of iodine to produce 43.1g of HI. use the equation below: H2+I2=2HI the answers: a) 21.8 b) 77.3 c) 33.7 d) 87.1 I started by trying to find the limiting reagent. I multiplied the 2.23 g...
March 22, 2016

Physics
An electric kettle has a power of 1.2kw. How long will it take to heat 3 kg of water to the from 20¡ãC to 100¡ãC?
March 22, 2016

Trigonometry
A wheel has a 12 inch radius rotating at 620 RPM. What is the speed of the car in MPH?
March 21, 2016

electrical electronics
Find the value of the remaining components of a common emmitter amplifer circuit given Ic=3mA, Tr=ZTx300, hfe=80, F=40Hz, Ve=2.5 show workings
March 20, 2016

electricity and magnetism
Four equal point charges, +3micro coulomb, are placed at the four corners of a square that is 40cm on a side. Find the force on any one of the charges.
March 19, 2016

Physics
A device that can alter the resistance in a circuit is known as a: a. switch b. potentiometer c. circuit breaker d. ammeter
March 18, 2016

math(mechanics static)
Three identical sphere with the same size and same weight. A 100N sphere is placed at th top of the 3 spheres. Find the contact force between the 3 spheres & the 100N sphere.
March 15, 2016

life orientation
Four aspects when choosing subjects
March 15, 2016

Physics
a speeding car is driving at 120 km/h when it passes a police cruiser that is driving at 100 km/h. One second later, the police cruiser accelerates uniformly at 15 km/h until it reaches a speed of 135 km/h. how long does it take the police cruiser to catch the car
March 10, 2016

Math
Convert 9 pounds 6 ounces into Kg.
March 9, 2016

Math
How to solve this problem? Here is what I have done so far. question --> 12(1/2)% x (1/2)/(3/4) First i solved the fractions (1/2) x (4/3) =4/6 I changed the 12(1/2)% into a decimal by solving 1/2, which is .5 which equals to 12.5 Answer is 1/12 but I have no idea how it ...
March 9, 2016

math
log(3) 9 = 2 The 3 that I put in ( ) should be lowered to a subscript.
March 9, 2016

math
This is similar to one I answered yesterday. between 0 and 5 inclusive the function = 2 between 5 exclusive and 10 inclusive function = 11-t between 10 exclusive and 14 inclusive function = 7 The cheapest would be 2 so that would be Nov. 7 and 8. c(12) used last one 7 c(5) use...
March 9, 2016

algebra
x = amount at 12% y = amount at 8% x + y = 12000 .12x +.08y = 1240 multiply by 100 to clear decimals 12x + 8y = 124000 -8x -8y = -96000 4x = 28000 x = 7000 y = 5000
March 9, 2016

Pre-algebra
I agree.
March 9, 2016

Math
Please what are the steps to solving this problem? I am stuck. question= 12 1/2% x (1/2)/(3/4) 12(1/2)% = 12.5 (1/2) x (4/3) 4/6 = 2/3 I dont know what to do next.
March 9, 2016

MATH.
y = x^9 times 5 + 6 trade the letters x = y^9 times 5 +6 Solve for y (x-6)/5 = y^9 take the 9th root of each side the 9th root of (x-6)/5
March 8, 2016

math
46 and 76 other means you add them together. 23/61
March 8, 2016

Math
You need a circle here. x^2 + y^2 = r^2 x^2 + y^2 = 100
March 8, 2016

Math
It is 27/161 161 dispensed of which 27 were white so that means 27 of the 161.
March 8, 2016

Math
The same as we have been doing in early questions. Can you tell me how you would set this up?
March 8, 2016

Math
We need more information to answer this question. 5/8 b + 5/9 g +48 =????
March 8, 2016

math
80 times 356 60 times 275 45 times 369 Add the answers you get for each multiplication and you will have your answer That should give you your answer.
March 8, 2016

Math
I think you want to give your brother 1/3 of what is left over right? You need the 3/4 for your shelf. If that is the case. 3/4 of 8 = 6 you take 6' for yourself and there is 2 feet left over and you will give your brother 2/3 ft. If it means that you give your brother 1/3...
March 8, 2016

math
12/4 = 3 so we have 12 1/4 cups plus the extra 1/4 cup gives us 13 1/4 cups.
March 8, 2016

Math
55 shows 45 were sold out 45/55 simplify.
March 8, 2016

Common core standard. math
W = 5/6 L A = L times W A = l times 5/6 L 360 = 5/6 times L squared 360 times 6/5 = L squared Multiply 360 times 6 divide that answer by 5. Now take the square root to find L.
March 8, 2016

Math
Yes.
March 8, 2016

Math
pentagon has 5 equal sides. Divide 16 by 5 to get your answer.
March 8, 2016

Math
It looks like the cheapest time would be between Oct. 20th and Oct. 23rd. c(9) would be 8 c(2) would be 3 The difference is 5.
March 8, 2016

math
77 trains and 55 were full 55/77 or 5/7 would be the probability written as a fraction.
March 8, 2016

Math
3 and 7/8 would be between 3 and 4, but closer to 4. You have to see if the ruler is marked in 8th or something else. If it is marked with 8ths, then count out 7 from the 3.
March 8, 2016

Math
I just did this below.
March 8, 2016

math
3.64 -3.25 divide by 3.25
March 8, 2016

Math
(x -3)(3 2/5) = 15 3/10 (x-3) (17/5) = 153/10 (x-3) = (153/10)(5/17) x-3 = 153/34 x-3 = 4 1/2 x = 7 1/2
March 8, 2016

Algebra 2 b
30 + x + x = 100 30 + 2x =100 2x = 70 x= 35
March 8, 2016

math
the slope you need the change in y divided by the change in x. -2 - 0 divided by 3 - (-1) -2/4 = -1/2 so I agree with you. y = -1/2 x + b you can choose either point and put in the x and y and solve for b. 0 = -1/2(-1) + b 0 = 1/2 + b -1/2 = b This is odd, but it can happen y...
March 8, 2016

math
And so we will multiply the two probabilities green even 3/6 or 1/2 white greater than 2 4/6 or 2/3 probability is 1/2 times 2/3 = 2/6 or 1/3 or as a decimal .333
March 8, 2016

MATH
Nina = sam + 4 (Nina +1) = (Sam +1) +3 Sam + 4 + 1 = Sam + 4 5 = 4 for a final answer which is a false statement; therefore there is no solution. Something is wrong with the problem as written.
March 8, 2016

database
what is InnoDB
March 8, 2016

engineering
an overview of MyISAM and InnoDB
March 7, 2016

prt 305
factors that affect location decisions
March 7, 2016

electrical technology
A battery of 9 V charges a capacitor of 47 ìF through a resistor. What resistor value needs to be used to obtain a voltage across the capacitor of 8 V when 10 seconds have elapsed ? You will need to obtain the standard equation for the voltage across the capacitor ...
March 7, 2016

math
54 to 96 reading the first number as the stem and the other numbers as the leafs. the range is the difference between those 2 numbers.
March 7, 2016

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