Questions Asked on
January 1, 2011

physics
a flute is essentially a pipe open at both ends. the length of a flute is approximately 66.1 cm. what is the third harmonic of a flute when all keys are closed, making the vibrating air column approximately equal to the length of the flute?
asked by jacquie 
Chemistry
Knowing that delta h vaporization for water is 40.7 kj/ mol calculate p vaporation of water at 37 degress
asked by Zana 
Trigonometry
Please review and tell me if i did something wrong. Find the following functions correct to five decimal places: a. sin 22degrees 43' b. cos 44degrees 56' c. sin 49degrees 17' d. tan 11degrees 37' e. sin 79degrees 23'30' f. cot 19degrees 0' 25'' g. tan
asked by Anon 
derivatives
If the derivative of f is given by f'(x)=ex3x2, at which of the following values of x does f have a relative maximum value?
asked by lisa 
PreCalculus
Cone Problem Beginning with a circular piece of paper with a 4 inch radius, as shown in (a), cut out a sector with an arc of length x. Join the two radial edges of the remaining portion of the paper to form a cone with radius r and height h, as shown in
asked by Emma 
Trigonometry
Sketch a height versus time graph of the sinusoidal function that models each situation. draw at lease three cycles. assume that the first point plotted on each graph is at the lowest point: a girl lying on a an air mattress in a wave pool that is 3 m
asked by Allison 
math
suppose you are drinking root beer from a conical cup. the cup has a diameter of 8 cm and a depth of 10 cm. as you suck the straw, root beer leaves the cup at the rate of 7 cm^3/second. at what rate is the level of the liquid in the cup changng when the
asked by stephen 
Pharmacy Tech
Rx: Prostaglandin E 10mcg/mL If the stock container of prostaglandin E is 100 mg/mL, how many 9mL dilutions are required to prepare the ordered concentration?
asked by Isha 
geometry
Triangle ABC, AB=8, BC=10, and AC=12, M is the midpoint of AB, and N is the midpoint of BC. What is the length of MN?
asked by Will 
physics
Three spheres, each with a negative chrge of 4.0x10^6C, are fixed at the vertices of an equilateral triangle whose sides are 0.20 m long. Calculate the magnitude and direction of the net electric force on each spehere. i used this:
asked by ali 
math
how much money would have to be invested in an account at 3.98% annual interset to achieve a balance of 25,000 in 17 years if a. The account pays simple interest b. the account compound interest qrtly c. the account compounds interest continuously
asked by rick 
Geometry
5. What theorem do Exercises 14 prove? (1 point) Triangle Inequality Theorem Converse of the Angle Bisector Theorem Angle Bisector Theorem Triangle Midsegment Theorem
asked by Anonymous 
Math
A baseball player hits a pitch when the ball is 2 feet off the ground. Two hundred feet from the plate, the ball reaches its maximum height of 82 feet. Will the ball clear the home run wall that is 10 feet high and 380 feet from home plate?
asked by Morgan 
Physics
Consider the diagram of the box and bucket. If the coefficient of static friction is 0.5 and the coefficient of kinetic friction is 0.3, find the maximum mass of the bucket in order for the system to be in static equilibrium. If the block was given a
asked by Caitlin 
precalc
How do you find coterminal angles between 0 and 2pi for angles given in pi radians?
asked by Sarma 
math
Bacteria are growing in a circular colony one bacterium thick. the bacteria are growing at a constant rate, making the area of the colony increase at a rate of 12mm^2 per hour. How fast is the radius changing when the radius is 3mm?
asked by stephen 
English
Please help me find these words in the book hatchet. These words are located in chapter 1316 and all I need to knnow is where these words are located. I have found the book online and I have posted it underneath. I have done a couple of words all ready so
asked by Mariyada 
math
A baseball player hits a line drive to center field. As he rounds second base, he heads directly for third, running at 20 ft/sec. How fast is the distance from the rnner to home plate changing when he is halfway to third base?
asked by stephen 
PreAlgebra
Can someone show me how to solve this problem step by step?Here is the problem, 26cm/s= m/min,how to solve it by convert rate suing dimensional analysis.
asked by kj 
physics
Three spheres, each with a negative chrge of 4.0x10^6C, are fixed at the vertices of an equilateral triangle whose sides are 0.20 m long. Calculate the magnitude and direction of the net electric force on each spehere. i used this:
asked by ali 
Trigonometry
Using exact values, find the value of: a. 12 sin 30 degrees ¨C 6 tan 45degrees + sec 45degrees / 52 121/26*(1) + ¡Ì2/52=¡Ì2/52 121/26+¡Ì2/52 what should i do next?? b. Sin2A + tan3A/2  cos A + sec(a+ 15) Sin2A + tan3A/2  cos A + sec(a+ 15)=
asked by Anon 
science
Helium has the lowest boiling point of the elements. The slightest change in temp can cause it to vaporize and expand. To prevent pressure explosions, a line from the tank has a "burst disk" in case a of sudden pressure increse. then the diaphragm would
asked by anonymous 
physical science
what physical law/s were used during the "burns" of Apollo 13 to adjust its path/trajectory and get it home? I know the thrusters used Newton's third law. What else?
asked by anonymous 
physical science
Helium has the lowest boiling point of the elements. The slightest change in temp can cause it to vaporize and expand. To prevent pressure explosions, a line from the tank has a "burst disk" in case a of sudden pressure increse. then the diaphragm would
asked by anonymous 
PreAlgebra
Can anyone show me step by step how to solve this problem? 26cm/s = m/min convert this problem using dimensional analysis.What is the answer and how did you get it?Thanks,kj
asked by kj 
physics
Three spheres, each with a negative chrge of 4.0x10^6C, are fixed at the vertices of an equilateral triangle whose sides are 0.20 m long. Calculate the magnitude and direction of the net electric force on each spehere. i used this:
asked by ali 
Math
Please help me factor this. x(x^34x^2+3x+18) (using synthetic division please.) Thank You.
asked by Ka 
Biography
What was Louis Armstrong's goals?
asked by Alex 
math
A ship is 400 miles directly north of the tahiti and is sailing south at 20mi/hr. another ship is 300 miles east of tahiti and is sailing west at 15mi/hr. at what rate is the distance between the ships changing?
asked by stephen 
Algebra
factor trinomial This is what I have so far don't know where to go from here 4h^2 + 8h  5 (4h^22h) + (10h5) 2h(h5) + 5(2h1) cant figure out what to do next
asked by Kim 
Algegra 1
The value v of a shopkeeper's inventory software program is given by v=1/3t+3, where t is the number of years since the shopkeeper brought the program. What is the program worth 9 years after it is first purchased? Plot the point with the given t value 9
asked by Esther 
math
a cord is used to lower vertically a block of mass M a distance d at a constant downward acceleration of 1\4 g, find the work done by the cord on the block ? FIND THE WORK DONE BY THE FORCE OF GRAVITT
asked by samina 
chemistry
If a person was locked in a perfectly insulated room 8 ft by 8 ft by 10 ft how long would it take the room temperature to increase from 75 degrees F to 100 degrees F? A person's body heat output is 100 watts and their volume is 3 cubic feet. Also, it is
asked by victoria 
functional english
How can i describe three different scenarios where stress can build up and affect a person? Also i have no idea on how to start! please help?
asked by Milly 
English
Can you please check these few sentences, please? In particular, I'm not sure about the vocabulary related to skiing equipment. Thank you. 1)Yesterday night we burst (set off) some firecrackers in the garden. Then we watched the fireworks from the window.
asked by Franco 
Calculus
Hi, I'm absolutely stuck on this problem. This is for a newton's method/linearization unit. Find an equation for the curve in the xyplane that passes through the point (1,1) if its slope at x is always 3x^2+2.
asked by Jay 
science
what are the steps to the scientific method?
asked by salam 
science
which one of these is a possible reaction? Cl2 + Br2 Br^1 + I^1 I2 + Cl^1 Br2 + I^1
asked by i love chem 
math
In a factory of electronic items, the total cost of production, expressed in thousands of dollars, is given by the function C(x)= (x^2x+2)/x+1 where x belongs to [0;5] and expressed in hundrends of items produced. 1) calculate in dollars the total cost of
asked by Jessy 
Biology
List and describe the steps involved when a gene in person's genotype is expressed to create a biochemical or physical characteristics that is a part of the persons phenotype.
asked by KYLA 
statistics
3. You obtain the following regression statistics for the relationship between defect rate and volume at one of your plants. You have a random sample of results from 160 shifts at the plant.
asked by john 
english
The poor woman had some _______(happy) days. Hari is the _____ (idle) boy in the class. The ______ (long) lane has a twining. Hunger is the ______ (good) sauce. I congratulated him on his ______ (good) fortune. There was not the ______ (slight) excuse for
asked by pratham 
Algebra 1
The value v of a shopkeeper's inventory software program is given by v=1/3t+3, where t is the number of years since the shopkeeper brought the program. What is the program worth 9 years after it is first purchased? Plot the point with the given t value 9
asked by Esther 
business
what is the difference between comparative & international criminal justice systems? explain with examples
asked by mee 
Math
What do you get when you solve this equation where t = time in hours log t = (0.576 log (72/526) 0.176 Would it matter if t were in minutes? Thank you
asked by Deborah 
Algebra
factor and solve 6d^2 + 2d = 10d + 35
asked by tana 
GRAMMAR
I used these in sentences, I just need to know if they are verbs? 1.Education is 2.have taken 3.will give 4.worked 5.will be leading
asked by Anonymous 
Algebra 1
The value v of a shopkeeper's inventory software program is given by v=1/3t+3, where t is the number of years since the shopkeeper brought the program. What is the program worth 9 years after it is first purchased? Plot the point with the given t value 9
asked by Esther 
PreAlgebra
Victoria you helped me with the last problem can you help me again with this one please? 26cm/s=m/min. Convert this using the dimensional analysis.Thankyou.kj
asked by kj 
science
how come there is a blackout period when the space shuttle goes behind the moon? Is it because radio waves can be transmitted through a solid object or through a vacuum or why?
asked by anonymous 
science
Whose responsibility is it to reduce our impacts on climate?
asked by melvin 
science
Which of the following properties increase with increasing atomic number for fluorine and chlorine? I. melting point of the elements (yes) II. boiling point of the hydrogen halides A) I only B) II only C) Both I and II D) neither I nor II I think it's A 
asked by i love chem 
math
Fadi is in a boat 3 kilometers away from the nearest point A at the sea shore.5kilometers away from A is the home of fadi. knowing that he can row 6km/hr and run 10km/hr.the objective of this exercise is to find the position of point B on the sea shore
asked by anna 
Global
How did the Scramble for africa impact people living back then & living today?
asked by karla 
algebra
show me how to find a slope?
asked by luz 
math
What terms is missing from this set of ordered pairs? (0, 2)(?, 0)(5,8)
asked by Nadine 
math
how do i simplify [(x^3/y^3) 1]/[(x^2+y^2)+(x/y)+1]
asked by emily 
math
if you have a bill of 1.354 pesos ( philippines money) how can you it equal to a three family. example .Daniel 2 children Rolando 4 children Dante 5 children. how much will he pay per head of the family in order to equal a bill of each children to a bill
asked by Greg 
com170
I would like to know if there are any errors . like comma uuseage question marks,quotation mark, and apostrophes, capitalization, colons,semicolons, andcommonly misuesd words Why are many students choosing to pursue their college degrees using their home
asked by angela 
java refractor
Why am I getting error called that the renaming refractor cannot apply in this context when trying to change a name in the netbeans? And how should I solve it? Please tell me quickly. emergency I need to submit my project tomorrow
asked by harry 
algebra 2
Q(x)= x^26x+3, find Q(3) I REALLY DON'T KNOW WHAT THE HECK ITS ASKING FOR
asked by AdamZeg 
PreAlgebra
can someone show me how step by step to convert this problem 45 mi/h=ft/s using dimensional analysis?Thanks.kj
asked by kj 
PreAlgebra
Can anyone show me step by step how to solve this problem? 26cm/s = m/min convert this problem using dimensional analysis.kj
asked by kj 
Precalc
How do you find coterminal angles in pi radians?
asked by Sarma