Wednesday

July 27, 2016
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*