nono
Popular questions and responses by nono
Physics
A batted baseball leaves the bat at an angle of 30 degrees above the horizontal and is caught by an out fielder 400ft from the plate. (a) what was the initial velocity of the ball? (b) How high did it rise? (c) How long was it in the air
asked on September 4, 2015 
life sciences
Grade 11 learners want to investigate which enzyme is responsible for chemical digestion of starch into glucose in humans. They are provided with two different enzymes (carbohydrase and proteases ),starch powder,warm water at about 37 and basic glass
asked on May 12, 2019 
Math
find the Derivative of:: 1\R = 1\R1 + 1\R2
asked on December 7, 2011 
Teas 6
Can someone help with the nursing teas 6 especially the teading part please
asked on October 10, 2016 
Mathematics
A machine takes 4.2 hours to make 7 parts. At that rate, how many parts can the machine make in 28.8 hours 48 parts 41 parts 172 parts 17 parts
asked on November 21, 2012 
chemistry
The mole fraction of nitrogen in air is 0.7808. calculate the partial pressure of N2 in air when the atmospheric pressure is 760 torr?
asked on November 18, 2011 
chemistry
calculate the mass of solid NaCl that must be added to 1.5L of 0.100M AgNO3 solution to precipitate all the Ag+ ions in the form of AgCl?
asked on November 18, 2011 
fluid
a tap discharge water evenly in a jet at a velocity of 2.6 m/s at the tap outlet, the diameter of the jet at this point being 15 mm. the jet flows down vertically in a smooth stream. determine the velocity and the diameter of the jet at 0.6 m below the tap
asked on December 23, 2013 
chemistry
20g of nitrogen gas and 10g of helium gas are placed together in a 5L container at 25C . Calculate the partial pressure of each gas and the total pressure of the gas mixture.
asked on November 20, 2011 
chemistry
Consider the following reaction 4Al + 3O2 = 2Al2O3 It takes 2.00 L pure oxygen gas at STP (0C ,1atm ) to react completely with a certain aluminum. What is the mass of aluminum reacted?
asked on November 18, 2011 
chemistry
Cumene is a compound containing only C and H that is used in the production of Phenol and acetone in industry. combustion of 47.6 mg cumene produce some CO2 and 42.80 mg water. the molar mass of cumene is between 115125 g/mol. Determine the empirical and
asked on October 15, 2011 
Accounting
debited J.stols with commission for services rendered on this behalf for R200
asked on January 21, 2020 
science
define photosynthesis
asked on July 23, 2017 
Sepration chemistry
Mixture of A,B,C if the mole fraction of A is 30 and B is 35 Volume percent calculate the mass and mole fraction of each compnant. given that A is methane, B is ethane, C is propane. use SI unit and English unit.
asked on September 16, 2013 
biostatatistic
is it more difficult to reject a null hyputhesis if we use a 10% level of significance compared to 5% level of significance.?
asked on December 11, 2012 
Math
Drinking 8 fluid ounces of milk provides 270.0 milligrams of calcium. How many fluid ounces of milk provide 72.5 milligrams of calcium? Round to the nearest tenth. 2.1 fluid ounces 2.3 fluid ounces 2.6 fluid ounces 1.8 fluid ounces
asked on November 21, 2012 
chemistry
What volume of ammonia at 7.0 atm and 235C would you get from 333g of nitrogen reactin with enough mass of hydrogen?k calculate the density of hydrogen at STP?
asked on November 18, 2011 
algebra
the officejet printer can copy lisa's dissertation in 18 min. the laserjet printer can copy the same document in 20 min. if the two machines work together, how long would the take to copy the dissertation
asked on September 20, 2009 
fluid
"A liquid with specific gravity 0.8 flows at the rate of 3 l/s through a venturimeter of diameters 6 cm and 4 cm. if the manometer fluid is mercury (sp. gr=13.6) determine the value of manometer reading,h.
asked on December 23, 2013 
Design
The flow system as shown in the Figure, the centrifugal pump(3500 R.P.M.) is delivering water at 100 gal/min and 70 °F into a boiler operating at a pressure of 35 psig. The water levels in the feed tank and boiler are constant. Because corrosion is
asked on December 17, 2013 
Electrical
If I2=2mA, I4=4mA, and I6=6mA, find I1,I3, and I5 ??
asked on September 16, 2013 
Fundamental Of Chemical Engineering
If a sulfuric acid plant is to produce 10 ton/day of 98% sulfuric acid, How much sulfur is needed, how much air is required and how much water is used?
asked on December 15, 2012 
Fundamental Of Chemical Engineering
If a sulfuric acid plant is to produce 10 ton/day of 98% sulfuric acid, How much sulfur is needed, how much air is required and how much water is used?
asked on December 15, 2012 
Biostatistic
A study is conducted in a patient with HIV.Lower CD4 count is associated with advance disease. A researcher is interested in the association between vitamin supplement and CD4 count.A MULTIPLE REGRESSION ANALYSIS is performed relating CD4count to the use
asked on December 11, 2012 
Biostatistic
A study is conducted in patient with HIV. Lower CD4 count is associated with advance disease. The researcher is interested in finding out the relation between supplement vitamins and CD4 count. A multiple regression analysis is performed relating CD4 count
asked on December 11, 2012 
biostatistic
Is this statement true or false: when calculating correlation coefficient between two continous variables, the scale on which the variables are measured affect the value of the correlation coefficient.
asked on December 11, 2012 
biostatistic
I am sorry, I do not know how one question is printed so many times. There was some problem in submission of question and when it is submitted, it is printed so many times.
asked on December 11, 2012 
biostatistic
is it true that it is more difficult to reject a null hyputhesis if we use a 10 %level of significance compared with a 5% level of significance?
asked on December 11, 2012 
biostatistic
is it true that sample size required to detect an effect size of 0.25 is larger than the sample size required to detect an effect size of 0.05 with 80% power ansd a 5% level of signisicance?
asked on December 11, 2012 
Thanks
Thanks David Q/R for your kind help.It did answer my question. They say for less then five failure and successes we use "exact method" and I was not finding about exact method. Thanks
asked on December 2, 2012 
biostatistic
can we use ttest for two independent sample and dichotomus study with less than five success or failures?
asked on November 28, 2012 
biostatistic
there are 200 subjects enrolled to receive either experimental medications or placebo. At the end of study following data is collected after 6 week. (sd)= standard deviation. BP= blood pressure. experimental meds placebo (n=100) (n=100) Mean BP 120.2(sd
asked on November 24, 2012 
statistic
Base line BP:120,145, 130,160,152,143,126. After 4 week:122,142,135,158,155,140,130. A clinical trial is planned to compare an experimental medication to lower blood pressure. a pilot study is conducted involving 7 subjects.The objective was to see how BP
asked on November 21, 2012 
biostatistic
Thanks for your help.
asked on November 21, 2012 
biostatistic
recent suggestion is 60 min of exercise per day. A sample of 50 adults in a study of risk factor report exercising a mean of 38 min per day with a standerd deviation of 19 min .based on sampal data, is physical activity significantly less than recommended?
asked on November 20, 2012 
BUSINESS PROBLEM SOLVING & PROGRAMMING
Using Flowchart and Pseudo Code and a single real example (trace), please solve the following problems: 1. Payroll Computation Compute the monthly salary for each of the 200 employees in a company assuming the formula for computing is as follows Salary =
asked on March 3, 2012 
Math
An open box is to be made from a 10ft by 14ft rectangular piece of sheet metal by cutting out squares of equal size from the four corners and folding up the sides. what size squares should be cut to obtain a box with largest possible volume?
asked on December 7, 2011 
chemistry
A 10.6 liter at 25 C and 3.21 atm inside pressure became 12.8 liters at 221 C after driving in summer. What is the pressure in the hot tire?
asked on November 20, 2011 
chemistry
what mass of barium sulphate can be produced when 100.0 ml of a 0.100M solution of barium chloride is mixed with 100.0 ml of a 0.100M solution of Iron(lll) sulphate?
asked on November 20, 2011 
chemistry
A solution is prepared by dissolving 0.5842g of oxalic acid (H2C2O4) in enough water to make 100.0ml of solution. A 10.00ml aliquot (portion) of this solution is then diluted to a final volume of 250.0ml. What is the final molarity of thus prepared oxalic
asked on November 18, 2011 
Math
FIND THE DERIVATIVE IF Y= (2X5)^2 / (X^2+4)^3
asked on October 25, 2011 
Math
find the limit lim x^2+x / x^5 + 2x^4 + x^3 as:: a) x=0+ b) x=1
asked on October 21, 2011 
Math
find the slope of the curve x^3 y^3 + y^2 = x + y at the point (1,1) and (1,1)??
asked on October 19, 2011 
Math
find d^85y/dx85 if y = sin x ?? I want the final rule because the solution will be repeated and therefore there will be a particular rule?
asked on October 19, 2011 
chemistry
A certain compound contains only vanadium and oxygen. A 35.00 g sample of the compound contains 19.61 g of vanadium. Determine the empirical formula of this compound.
asked on October 15, 2011 
Principle
"the maximum blood pressure in the upper arm of healthy person is about 12mmHg.If a vertical tube open to the atmosphere is connected to the vein in the arm of the person,determine how high the blood will rise in the tube.Take the density of blood to be
asked on March 6, 2012 
English Gr.11
If you have read the Handmaid's Tale by Margaret Atwood then in your opinion who do you think has a better life, the handmaid's or the jezebels? Explain why.
asked on May 15, 2010 
ALGEBRA
DURING THE FIRST PART OF A TRIP, A CANOEIST TRAVELS 35 MILES AT A CERTAIN SPEED. THE CANOEIST TRAVELS 17 MILES ON THE SECOND PART OF THE TRIP AT A SPEED OF 5 MPH SLOWER. THE TOTAL TIME FOR THE TRIP IS 3 HRS. WHAT WAS THE SPEED ON EACH PART OF THE TRIP?
asked on October 2, 2009 
math
the officejet printer can copy lisa's dissertation in 18 min. the laserjet printer can copy the same document in 20 min. if the two machines work together, how long would the take to copy the dissertation
asked on September 20, 2009

Social Studies help
1:B 2:D
posted on March 21, 2018 
probability
a) = var(K/o)= np(1p) = 9*(1/3)*(2/3)= 2
posted on February 12, 2018 
Lifeorientation
South Africa
posted on May 2, 2016 
math
Ivan is saving money to buy a computer with. He started with $225 in his savings account and the first week he added $75, the second week he added $200, the third week he unfortunately had to take out $50 and the fourth week he added $125. How much more
posted on November 10, 2015 
Fundamental Of Chemical Engineering
OK what about if we have all this equations: H2SO4→ so3+H2O SO3→ SO2+1\2O2 SO2→ S+O2
posted on December 15, 2012 
Fundamental Of Chemical Engineering
They didn't give us an equation but I write this, I don't now if it's right or not. SO3 (g) +H2O (l) → H2SO4 (l)
posted on December 15, 2012 
Life orientation
Solution
posted on April 27, 2012 
Life orientation
Recomendation how to addrese enviromental problem
posted on April 25, 2012 
chemistry
which of them will be the limiting reactant??
posted on November 20, 2011 
chemistry
The mass will be 12.73 g ?!!!!
posted on November 20, 2011 
chemistry
The final answer is 10000 ????
posted on November 20, 2011 
Math
WHAT IS THAT x3y3 + y2 = x + 1 ??
posted on October 25, 2011 
chemistry
THANKS ALOT
posted on October 16, 2011 
chemistry
Is The Molecular formula is :: V2(O2)5 ????
posted on October 15, 2011 
chemistry
THANKS
posted on October 15, 2011 
chemistry
I can not find the molar mass can you help me more..
posted on October 15, 2011 
Life orientation
cn pls help me
posted on May 16, 2011 
math
y=9(1/2)x
posted on September 20, 2009 
algebra
Wouln't it have to be a shorter timeframe since they are both working together? and one of them does it in 18 mins ..
posted on September 20, 2009