Questions Asked on
March 27, 2007

Physics
A hollow, spherical shell with mass 2.00 kg rolls without slipping down a slope angled at 38.0 degrees. (a) Find the acceleration, the friction force, and the minimum coefficient of fricition needed to prevent slipping. You will find the moment of inertia
asked by Karla 
Physics
A woman with a mass of 50kg is standing on the rim of a large disk that is rotating at an angular velocity of .50 rev/s about an axis through its center. The disk has a mass of 110kg and a radius of 4.0m. Calculate the magnitude of the total angular
asked by Karla 
Calculating distance(law of cosines)
Observers P and Q are located on the side of a hill that is inclined 32 degrees to the horizontal as shown(picture given). The observer at P determines the angle of elevation to a hot air balloon to be 62 degrees. At the same instant the observer at Q
asked by Jen 
Physics  KE/inertia
The rigid body shown in Figure 1066 (it is a triangle with the upper mass = to M and the bottom two corners/masses equal to 2M. The bottom side length equals .70 cm with point P in the middle of the side and the other two sides equal .55 cm)consists of
asked by COFFEE 
Chemistry
Could someone check my answers? 1. Why was 95% ethanol alcohol added when titrating aspirin in an experiment? Because it helps the aspirin dry quicker and become pure while the titration is going on. 2. Would the following mistakes cause the calculated
asked by Jim 
Navigation
A fisherman leaves his home port and heads in the direction N 70 degree W. He travels 30 mi and reaches Egg Island. The next day he sails N 10 degree E for 50 mi, reaching Forrest Island. a) Find the distance between the fisherman's home port and Forrest
asked by Jen 
Physics
A cord is wrapped around the rim of a wheel .250 m in radius, and a steady pull of 40.0 N is exerted on the cord. The wheel is mounted on frictionless bearings on a horizontal shaft through its center. The moment of inertia of the wheel about this shaft is
asked by Karla 
humanities...NEED BY TONIGHT!PLEASE!!!!!!!!!!!!!!!
what is some things about ancient egyptian art and culture THNX :) I went to Google and searched for ancient egypt art culture and here are the results:
asked by vahnna 
Physics
Forces F1=7.50N and F2=5.30N are applied tangentially to a wheel with radius 0.330 m. What is the net torque on the wheel due to these two forces for an axis perpendicular to the wheel and passing through its center? It depends upon whether or not the
asked by Karla 
math
The measure of an interior angle of a regular polygon is 135 degrees. Find the number of sides in the polygon. This is what I tried: 180(x2)=135 [Interior Angle Sum Theorem] x2=.75 x=2.75 That can't be right though. Help? Not sure about your formula.
asked by Emily 
ENGLISH (LANGUAGE ARTS)
REcognizing Antecedents http://grammar.ccc.commnet.edu/grammar/pronouns.htm http://owl.english.purdue.edu/handouts/grammar/g_pronuse.html And others: http://www.google.com/search?hl=en&q=recognize+antecedent+grammar =)
asked by Nicki S. 
Law of cosines
A tree on a hillside casts a shadow 215 ft down the hill. If the angle of inclination of the hillside is 22 degree to the horizontal and the angle of elevation of the sun is 52 degreess, find the height of the tree. TIA sorry this is law of sines. sorry
asked by Jen 
science
A gear with 30 teeth turns a gear with 5 teeth. How many turns will the driven gear turn for every turn the drive gear makes? Is this type of gear train usedto increase force or speed and distance? The tumber of teeth engaged is the same for both gears,
asked by kelly5 
Physics
In the old days, on a cold winter night it was common to bring a hot object to bed with you. Which would be better to keep you warm through the cold night  a 10 kg iron brick or a 10 kg jug of hot water at the same temperature? 10 kg iron brick 10 kg jug
asked by Kristina 
Chem 12
Okay, this is a twopart question and the unit is acids and bases. Ka for NH4 is 5.6 x 10^ 10 Kb for NH3 is 1.8 x 10^ 5 1. Determine the pH of a solution prepared by adding 0.0500 mole of solid ammonium chloride to 100mL of a 0.150 molar solution of
asked by Kevin 
math
Jose rode his trail bike for 10 miles. Twothirds of the distance was over a mountain trail. How long is the mountain trail? what answer did you get 6 2/3 minles 6 2/3 miles
asked by geo 
PRECAL!
Prove: (3cosx + 4sinx)^2 + (4cosx  3sinx)^2=5 ...this is all under the square root sign. this is what i did please check. i multipied both binomials. but i get cos square x..and sincosx ..how do i combine them..please help! In this case, after multiplying
asked by just 
Physics
The Spinning Figure Skater. The outstretched hands and arms of a figure skater preparing for a spin can be considered a slender rod pivoting about an axis through its center . When his hands and arms are brought in and wrapped around his body to execute
asked by Karla 
calculus
A Norman window has the shape of a semicircle atop a rectangle so that the diameter of the semicircle is equal to the width of the rectangle. What is the area of the largest possible Norman window with a perimeter of 33 feet? I got
asked by jimmy 
safety
i need to find information on the history of the automobile and how it has impacted the world (changed the world as well) economically and socially. thank you History of the automobile: http://en.wikipedia.org/wiki/History_of_the_automobile As far as the
asked by Amy 
Chemistry
I have this awful problem due tomorrow; if anyone can help it would be much appreciated. Most introductory chemistry texts provide a formula for the freezing point depression/boiling point of elevations: deltaT(f,b)= K(f,b) * m (m = molality) In fact,
asked by Megan 
physics (thanks)
in the context of the loop and junctions rules for electrical circuits a junction is: a) where a wire is connected to a resistor b) where a wire is connected to a battery c) where only two wire are joined d) where three or more wire are joined e) where a
asked by susane 
math
If a rule is (3x,y) and a scale factor of 4 is used to transform it , what will the new rule be??? Show work 12x, 4y?
asked by matt 
Writing lesson plans
I have to prepare a lesson plan on a health unit "What Makes Our Bodies Grow" for a class size of 15 kindergarteners. Any ideas would be welcome. Does anyone know of websites that can help? Thanks! you could go to the library and maybe get some kid book
asked by Thalia 
math
how many microseconds are in a minute. A microsecond is one millionth of a second there are 60 seconds in a minute. So 60 times one million is what? or (60)(1,000,000)=? got it thank you so much..
asked by kg 
economics
What is goal limitation in relating to the growth of firm? sorry, i have never seen the term "goal limitation" as a reference to an economic concept or economic modeling.
asked by Nuwan 
math
Find the measure of a exterior angle and a interior angle of a polygon with x+2y sides. How do you do that?
asked by Emily 
Physics
The 2cm (radius) current loop shown in the figure is changing from Î¸1 = 11 degrees to Î¸2 = 66 degrees in a magnetic field 2 T in 0.5 seconds. What is the magnitude of the induced emf to the nearest hundredth of a millivolt? The wire in Problem 2 has
asked by Jonathan 
Calc AB
What is the area of the region in the first quadrant enclosed by the graph of y=e^(x^2/4) and the line y=0.5? When I graphed the two functions they don't even connect so the answer would be infinity. What am I doing wrong> Integrate y=e^(x^2/4) from x=0 to
asked by Mischa 
Math
If a rule is (3x,y) and a scale factor of 4 is used to transform it , what will the new rule be??? Show work
asked by Jessica 
social studies
how did the war with mexico lead to conflict between the north and the south? Texas was proslavery. http://www.pinzler.com/ushistory/timeline5.html
asked by caleigh 
govenment
1)In what ways does the existence of minor parties also work to strengthen the United States' twoparty system? 2)What does the fact that aliens generally are not allowed to vote show about American beliefs? It shows that Americans believe that no one
asked by Debra 
Ap European History
Discuss the characteristics and consequences of imperialism in the late 1800s and early 1900s. In your essay explain the various motives for imperialism and provide and example of each. also analyze the positive and negetive effects of imperialism on
asked by Alicia 
Chem
At 58.8 degrees C and at a total pressure of 1.00 atm the mole percent of acetone in the vapor state above a solution of acetone and water containing 70. mol % acetone is 87.5%. Assuming the solution to obey Raoult's Law, determine the vapor pressure of
asked by Chris 
Math
How do you remember all the regruping stuff love Ally pethebridge First, for your own safety, use only your first name in posting. Thanks. Remembering "regruping stuff" is accomplished by the same methods used for studying any subject. These sites might be
asked by Ally Petehbridge 
calculus
express in sinx 1 1  +  cscx + cotx cscx  cotx and express in cosx 1 + cot x   sin^2x cscx = 1/sinx so what do i do w. that extra one on the top!?? im so confused cscx Your fractions aren't lining up. This question is also not
asked by linds 
word expressions
2 times a number, increased by 28 is less than or equal to 6 times that number is this how i should write this 2*x+28 28 x > 7
asked by tom 
inequality expresion
The cost of a long distant telephone call is $0.36 for first minutes and $0.21 each additional minutes or portion thereof. Write an inequality representing the number of minutes a person could talk with out exceeding $3.00 would this be written as
asked by linda 
physics
The emf of a battery is equal to its terminal potential difference: A) under all conditions B) only when the battery is being charged C) only when a large current is in the battery D) only when there is no curent in the battery E) under no conditions my
asked by susane 
Genetics Biology
Please if anyone could help me with a few suggestions about how to answer this question. A mutation produces a change to produce the dominant gene for continued lactase production throughout adult life. This occurs very frequently and is present in almost
asked by Katie 
math
3/4x2/5y=2 1/2x3/5y=2 im having trouble re aranging the y and the x values and im saposed to be sovling it with either substition or elimination Try this: Double the last equation to get x = 4 + (6/5) y Then substitute that x into the first equation
asked by robynn 
math
Find the equivalent measure. 45 feet=___________yards show work I suggest looking up the conversion factor between the two and working from there
asked by Katelyn 
Chem
if the pressure was increased in this reaction : 2NO(g)+ O2 =====> 2NO2
asked by Hello Kit 
Math
The objective of statistics is best described as: A) To make inferences about a sample based on information we get from a population B) To use population mean, ƒÝ as an estimate of the sample mean, C) To make inferences about a population based on
asked by Carla 
Science
How does friction affect the mechanical advantage of a machine? It lowers it
asked by Kelly 
Math
Construct a histogram and a frequency polygon for the following frequency distribution Miles
asked by michael 
science
You move a 300N object 2 meters in 3 seconds. a. How much work do you do? b. What is your power?
asked by angel 
math
Find the slope of 0,0 3,5 please help i stink at math rise = 3 run = 5
asked by amanda 
launguage arts
What does Adhere mean?? stick to to stick to Here are some good online dictionaries you can use when you need them: http://www.answers.com http://www.onelook.com http://www.yourdictionary.com =)
asked by melody 
us history
what is a political party? please respond me A political party is a political organization that seeks to attain political power within a government, usually by participating in electoral campaigns thank you for your answer
asked by lezou jonathan 
science
How is homeostasis maintained in the digestive system? Homeostasis is maintained by negative feedback  For example.....a thermostat controlling temperature. When the temp goes down, the thermostat senses it and turns on the heat. When it gets to hot,
asked by j 
Short translation Spanish
How would you say, 'that is just a fraction of many representations.' (an idiomatic expression yet again) Last post! Sorry and thank you so much for helping me on this oral. Thank you for using the Jiskha Homework Help Forum. "Eso es no más que una
asked by Anna 
Ecconomics
Explain the factors that limit the growth of firms. do some research, and then take a shot. There are multitudes of factors that limit the growth of firms.
asked by Laxman 
Computer programinng
How do I write a switch statement that displays "hello", "goodbye", and "Have a nice day"? In which language?
asked by lisa 
algebra
The electricity costs of a business decreased from $12,000 one yeart to $10,920 the next. What is the rate of decrease? the formula i am suppose to use i believe is amount/ base= rate/100 is this way i should do it 12,000/10,920=r/100 I seem to get the
asked by RAY 
government
Suppose major officeholders from a particular party are not performing well, and the part is not monitoring these officeholders. In what ways could this situation affect the party as a whole? my answer is that it could be affected by the party not taking
asked by Debra 
Chemistry
if the pressure was increased in this reaction : 2NO(g)+ O2 =====> 2NO2
asked by Happy Camper 
Science
Name a compound machine and tell what simple machine it contains? pencil sharpiner wedge and wheel and axle
asked by Kelly 
Physics
If you wish to warm 120 kg of water by 16°C for your bath, how much heat is required? ((The heat capacity of liquid water is 4186 J/(kg·oC) ) Q = M C *(delta T) delta T = 16 C (it means "change in temperature) M = 120 kg C = 4186 J/(kg·oC Multiply it
asked by Paula 
math
If a rule is (3x,y) and a scale factor of 4 is used to transform it , what will the new rule be??? Show work
asked by my world 
Physics  KE
In Figure 1132 (which shows a ball at the top of an incline, at the bottom of the incline a loop begins with radius R and Q a point on the loop lined up with the center of the loop), a solid brass ball of mass m and radius r will roll without slipping
asked by COFFEE 
calculus
a security camera in a bank is mounted on the wall 6.2 ft above the level of the counter and 9.4ft behind the front edge of the counter. What is the angle of depression of the camera if it is to be aimed 2 ft beyond the front edge of the counter. i
asked by sam 
accounting need help ASAP
Write the transaction to record employer's payroll taxes. Thank you for using the Jiskha Homework Help Forum. Although I'm not exactly sure what you need, hopefully the following link will help you: http://www.accountmate.com/am7/PR_Module.asp
asked by Anonymous 
Germany and China
I have to find out how people in Germany AND China get their drivers license..as it what process do they have to go through Thanks Thank you for using the Jiskha Homework Help Forum. The first links will be about Germany. If you have an American license,
asked by Amy 
safety
I have to find out was sort of specific impact on the economics of Germany and China has automobile accidents had. And the number of individuals killed and injured, property damage, etc. How does the United Nations see the outcome of the automobile
asked by Amy 
Traffic Safety
I have to find the top 5 reasons that causes traffic accidents on this website NHTSA.gov but I can't seem to find it anywhere thanks NHTSA is past of the Department of Transportation (DOT). The correct web address is NHTSA.dot.gov. I found this aite more
asked by Amy 
English
Can you please put this into iambic penatmeter: It is the end of time as we know it The end of four years is coming very near It is time to look at my yearbook a bit, It's the yearbook of my past times, so dear Iambic pentameter sounds something like this:
asked by Jackie 
word unscramble
xhfzhgzhoita Check the spelling. I found no matches.
asked by lynne 
math,algebra,correction
the direction say to calculate to approximate radical(22) to the nearest hundredth. Using the calculator. so i get this: 4.6904157 so if i round to the nearest hundredth would it then be4.69 only how do you write and equation for this condition: center
asked by jasmine20 
Animal Art
1. Which of the following statements regarding the use of pastels with other mediums is true? A. Pastels should never be used for accents in a watercolor painting. B. An artist can effectively add charcoal over a pastel rendering. C. Pastel tends to deaden
asked by Erin 
math
A Ski jumper starts at point A and leaves at point B. Assume a(naught)=gsin(theta) tangent to path, where g=9.81m/s^2. Determine takeoff speed, v, if r=60m and theta=40 degrees. (Hint: You will need the chain rule.)
asked by Callie 
Math
A survey on 25 people on how they got news resulted in the following data. M
asked by Carlos 
Math
) Find the a) mean, b) median, c) mode, and d) midrange, for the given set of data.
asked by Jennifer 
Calculus
Given f and g are differentiable functions and f(a)=4, g(a)=c, g(c)=10, f(c)=15 f'(a)=8, g'(a)=b, g'(c)=5, f'(c)=6 If h(x)=f(g(x)). find h'(a)? i'm not really sure how to get the answer. g'(a)=b, f'(b)=? How do i go about doing this. My reasoning must be
asked by Sara 
math
Hank Kerchief went to the sale, bought a cd at 30% off and received a $6.00 discount. What was the original price of the cd??? Show work The $6 discount WAS the 30% reduction off the original price, P. Solve this equation for P: (1  0.30) P = 6
asked by Katelyn 
Math
Use each function rule. Find y for x = 1,2,3, and 4 Question y = 2x you multiply all the x numbers by 2 and that will give you your number for variable y =)
asked by Mike 
Math
Below are the grades of 50 students on a marketing test.
asked by Mark 
Math
A survey on 25 people on how they got news resulted in the following data. M
asked by Carlos 
help math
Find the equivalent measure. 45 feet=___________yards show work Isn't there three feet in a yard. So multlply by 1yard/3feet. so its 3
asked by matt 
Sciene
The question is list ten habitats in the picture and the picture is a running water commujnity and the animals are limpet, bivalve, water louse, caddis fly lava, crayfish, flatworm, shrimp, snail and dragon fly.
asked by Sarah 
Math
A governor would like to find out how people in his state feel about state subsidized public art. How might a cluster sample be selected? I searched Google under the key words "cluster sampling" to get these possible sources:
asked by jenn 
social studies
world war 2: what happened to the Desert Fox, Erwin Rommel's men as a result of Operation Torch? http://en.wikipedia.org/wiki/Erwin_Rommel
asked by cori 
Science
Who discovered/named the first case of melanoma and when was it? http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11149783&dopt=Abstract
asked by Taylor 
math
find slope 5,2 7,4 i think its 6 over 11
asked by hottty 
ENGLISH
a lyrics that is best describe patroclus character in the novel of iliad. another lyrics that is best describe andromache in the novel of iliad
asked by cassandra 
Math(Please Help)
Problem: x/4  4/x = 0 Directions:Solve the rational expression. x = 4 x = 4
asked by margie 
Physics  KE
In Figure 1132 (which shows a ball at the top of an incline, at the bottom of the incline a loop begins with radius R and Q a point on the loop lined up with the center of the loop), a solid brass ball of mass m and radius r will roll without slipping
asked by COFFEE 
Math2(PLease Help)
Directions:Solve the rational expression. Problem: 1/(x+3)+1/(x3)=1/(x^29) get (x+3), (x3), and (x^29) to the same denominator...
asked by margie 
math
There are 3 feet per yard. Do the division and what do you get? ?? Find the equivalent measure. 45 feet=___________yards show work 15
asked by Writeacher 
math
what is the slope of6,3 2,9 help 6,3 2,9 I take these are coordinates. Gradient of a line is given by: (y2y1)/(x2x1) so y2=3, y1=9 x2=6, x1=2 substitute in to the above and calculate the gradient.
asked by amy 
Social Studies
Does anyone know a website in which you can view Americas favorite pets? I need it ASAP, please. You could try this: Go to http://www.google.com and click on Images. Type in america's favorite pets and see what happens. Dogs and cats will come out on top,
asked by Dawins 
social studies
does anybody know a good web site to get info on Samual Adams go to wikipedia and type him in WLCM :) why did hamitlon fee; it was so important to pay back the national debt what is the answer for a rule by the people is called
asked by pi 
humanities...NEED BY TONIGHT!PLEASE!!!!!!!!!!!!!!!
also need things about egyptian education Use the same method I gave you in your first question. =)
asked by vahnna 
calculus
what is the property that distinguishes finite sets from infinite sets (give examples of each to accompany explaination). finite sets are countable. Infinite sets are not. so what would be an example of an infinite set? one that never ends? yes.
asked by Anonymous 
Germany and China
I need to know if Germany and China both have liability insurance and what does it cover? (need references) also driving under the influence/BAC and punishment for (both countries) are selt belts required for these countries? Thank you for using the Jiskha
asked by Travis 
history
who is the doctor that is working on the first car that will drive in th sky Since this is not my area of expertise, I searched Google under the key words "flying car history" to get these possible sources: http://travel.howstuffworks.com/flyingcar1.htm
asked by none 
Information MGT
How would today's business environment's be affected if we decided to get rid of all computer and information systems? Do you think it would have a serious affect on the global economy considering that mankind has been involved in various businesses much
asked by Ms Brown 
Molecular Cell Biology
How do you knock out a gene in cell culture?
asked by Susan