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March 29, 2015

Posts by Jennifer


Total # Posts: 2,086

Physics - Hellp Really Stuck!
1. A 0.20 kg object moves at a constant speed in a horizontal circular path of radius "r" while suspended from the top of a pole by a string of length 1.2 m. It makes an angle of 62 degrees with the horizontal. What is the speed of this object? 2. An object of mass 3...
December 11, 2010

math
4 ft 9 in 13 ft 9 in 4 ft 3 in Gives 21 ft 21 in Since 12 inches make a foot, 21 in - 12 in = 9 in Add another ft and keep the remaining inches The total length needed is: 22 ft 9 in
December 11, 2010

exam study math guide CRUICAL
Julie's score = 100 Sara's score = x Anne's score = x + 10 Average = 72 = total of all scores / 3 72 = (100 + x + (x + 10)) / 3 72 = (100 + 2x + 10) / 3 216 = 110 + 2x x = 53 Sara's score = x = 53 Anne's score = x + 10 = 63 Double check: (100 + 53 + 63) / 3...
December 11, 2010

Chemistry
Which of the following oxides yield an acidic solution when dissolved into water? P4O10 Na2O ClO7 Fe2O3 Thanks for any help.
December 11, 2010

Math
Put the equation in the form y = mx + b -6y = -3x + 12 y = (1/2)x - 2 Slope = m = 1/2 y intercept = (0,b) = (0, -2)
December 11, 2010

physics
A ball has a mass of 0.14 kg and is pitched w/ velocity of 38 m/s. The batter hits the ball & departs w/ a velocity of 58 m/s. Contact time b/w the bat and ball is 4.0 x 10-3seconds. What is avg force exerted on ball?
December 11, 2010

Physics
Hi drwls: I had a question about this one. Don't we have to convert the weights into newtons for this problem and the distance to meters since torque is in Nm?
December 8, 2010

Physics
A 10N meterstick is suspended by two sping scales, one at the .08 m mark and the other at the .9 m mark. If a weight of 5N is hung at the .2 m mark and a weight of 17N is hung at the .55 m mark, what will be the reading on each scale? I have: F(_1)+F(_2)=5+10+17=32 With moment...
December 8, 2010

Physics
Thanks Quidditch!
December 7, 2010

Physics
A 30 N fishing pole is 2.00 m long and has its center of gravity .350 m from the heavy end. A fisherman holds the end of the pole in his left hand as he lifts a 100 N fish. If his right hand is .800 m from the heavy end, how much force does he have to exert to maintain ...
December 7, 2010

Physics 40
A pendulum bob of mass M1 oscillates with a period of 1.0 s. If the length of the pendulum remains the same, but the pendulum bob is replaced with another one of mass M2 = 2*M1, what is the new period? I need help.
December 7, 2010

math
-17+5 -12
December 7, 2010

math
-17+5 -12
December 7, 2010

MATh
Sorry, hit the wrong key: (1/2)(36)=$18.00
December 6, 2010

MATh
First find out how much of her allowance she earned washing dishes and cleaning her room: (1/3)+(1/6) (Find LCD) =(2/6)+(1/6) =3/6 =1/2 So if 1/2 of her allowance is earned washing dishes and cleaning her room, then the other 1/2 of her allowance is earned doing other things. ...
December 6, 2010

Physics
Thanks drwls!
December 6, 2010

Physics
I followed up to this point: F = M (12.8 - 9.8) = M* 3 m/s^2. I do not understand why we must divide by g (9.8).
December 6, 2010

Physics
Forgive my ignorance, but how do I find the mass when I do not know the seat force?
December 6, 2010

Physics
A loop-the-loop ride at an amusement park has a radius of 5 m. At the highest point, the rider moves at 8 m/s. At the lowest point the rider moves at 13 m/s. Find what you would feel like you weigh at those points. (This force represents the force of the seat against your rear...
December 6, 2010

math
The formula for the circumference of a circle is C=2(pi)r. If we divide both sides by 2(pi) we have: C/2(pi)=r Substituting 29 for C we have: 29/2(pi)=r and therefore the correct answer would be "g."
December 6, 2010

algebra
I'm not sure what you mean by solving it wrong, as you...don't appear to be solving it at all? Are you supposed to be finding the x-intercepts? The graph of this function is a parabola, with vertex at (-h, k). You can find this vertex from the form y = a(x-h)^2 + k. So...
December 6, 2010

geometry
Let r=AB. Since we were given AC=12 and angle B=60, we can use: sin 60 = 12/r Solving for r we have: r = 12/sin 60 = 13.86
December 5, 2010

Physics HELP!
So then assuming the swing is uniform, do I have: T1 + T2 = 650 + 490 + 150 = 1290 N Then, T1*1.7 -0.95*650 - 0.5*490 -.85*150 = 0 Solve for T1 and then use the first equation to solve for T2?
December 5, 2010

Physics HELP!
Shouldn't we consider the weight of the swing as well?
December 5, 2010

Physics HELP!
A 650 N boy and a 490 N girl sit on a 150 N porch swing that is 1.70 m long. If the swing is supported by a chain at each end, what is the tension in each chain when the boy sits .75 m from one end and the girl .5 m from the other end?
December 5, 2010

algebra
1-5=-4m^2 -4=-4m^2 Dividing by -4 on both sides we have: (-4)/(-4)=(-4m^2)/(-4) 1=m^2 Take the square root of both sides we have: sqrt(1)=sqrt(m^2) 1=m or m=1 Hope this helps.
December 5, 2010

College Chem
Thank you, we were doing, n=VRT P
November 29, 2010

College Chem
We did that and somehow got the wrong answer. can you please give me a step by step? Thank you...
November 29, 2010

College Chem
A diver exhales a bubble with a volume of 25 mL at a pressure of 2.4 atm and a temperature of 15 degrees C. how many gas particles are in this bubble?
November 29, 2010

Chemistry
4.745 eq. of magnesium will displace how many grams of silver from a silver nitrate solution? I have written the equation as follows: Mg + 2AgNO3 = Mg(NO3)2 + 2Ag I'm not sure how to proceed with converting the 4.745 eq. Any help would be appreciated.
November 28, 2010

chemistry
New to working with equivalent weights. Any help would be appreciated. A metal weighing 4.0080 g formed 4.1002 g of hydride. What is the equivalent weight of the metal?
November 28, 2010

physics
A ball is thrown straight upward and returns to the thrower's hand after 2.20 s in the air. A second ball is thrown at an angle of 31.0° with the horizontal. At what speed must the second ball be thrown so that it reaches the same height as the one thrown vertically?
November 18, 2010

geometry
the person on top of me needs to stfu k if yu dont know the !@#$%^&ing answer dont waste other folks time k?
November 18, 2010

Physics
A typical coal-fired power plant burns 310 metric tons of coal every hour to generate 790 MW of electricity. 1 metric ton= 1000 kg. The density of coal is 1500 {\rm kg}/{\rm m}^{3} and its heat of combustion is 28 \;\rm MJ/kg. Assume that all heat is transferred from the fuel ...
November 17, 2010

math
Let π denote the proportion of grocery store customers that use the store's club card. For a large sample z test of H0: π = .5 versus Ha: π > .5, find the P-value associated with each of the given below values of the test statistic.
November 16, 2010

managerial accounting
The following direct materials and direct labor data pertain to the operations of Solario Manufacturing Company for the month of August Costs Quantities Actual labor rate $13 per hour Actual hours incurred and used 4,200 hours Actual materials price $128 per ton Actual ...
November 15, 2010

physics
An arrow is shot horizontally off a 100 m high building. A target is dangled from a rope 204 m away. How far off the ground do you have to dangle the target from the arrow to hit it?
November 14, 2010

physics
A 1.2 kg cannon ball is shot off a platform (1) at 10 m/s. It hits a platform (2) and begins to roll without bouncing. The coefficient of friction between platform (2) and the ball is .3. How far does the ball land from platform (2)? How long does it take to hit the ground?
November 13, 2010

Chemistry
I always have trouble with making an hypothesis for a lab. I was wondering if someone can help me come up with a hypothesis for a formation of salt lab. Thanks!
November 13, 2010

2nd grade
what is a vertex?
November 11, 2010

Art
What atrists, styles and events did Pierre Auguste Renoir have influences on?
November 11, 2010

applied physics
an airplane is heading due west at a velocity of 500 miles/hr. There is a cross wind due North at a velocity of 50 miles/hr. find the airplanes velocity relative to the ground (magnitude and direction)
November 11, 2010

accounting
You have been asked to speak at a career fair for high school students in your home town. Specifically, you are making a presentation about your role as an accountant. •Describe for the students the primary objectives of accounting. •Explain the basic terminology of ...
November 7, 2010

physics
Ugh. I just got this as part of a lab question. It makes no sense what-so-ever in context. NEVER TAKE ONLINE PHYSICS IN HIGHSCHOOL!!! Lol.
November 6, 2010

8th grade
A store that personalizes shirts chargers $20 for a shirt plus $.75 for each letter. Write an algebraic expression for the cost os "t" shirts using "n" letter each.
November 5, 2010

math
what is the pattern 17- - 62 - 92
November 3, 2010

Physics
If a 1-kg mass fell toward Earth from a large distance where it had zero relative velocity, what would be the velocity at the Earth's surface?
November 3, 2010

math
its a function table input|output -3 | 7 0 | 1 3 |-5 8 |-15
November 2, 2010

ethics
How did slavery influence the evolution of both Back and White America today?
November 1, 2010

Physics
A house painter is standing on a uniform, horizontal platform that is held in equilibrium by two cables attached to supports on the roof. The painter has a mass of 75 kg and the mass of the platform is 20.0 kg. The distance from the left end of the platform to where the ...
October 28, 2010

adult education
I need help with someone to go over my eassy with me can someone please help me.This is my first time using this site so I don't know how it really works SOMEONE PLEASE HELP ME!!
October 27, 2010

Science
PLEASE HELP Science Test Friday Study Guide? I have 1 to 22 already but I am stuck now I have to have this completed and correctly for my study guide. I have a C right now I need an A on this test to bring it up to a B or I stay on restriction please help I have been on ...
October 26, 2010

Science
I have worked the answers out only Im not sure if they are correct this is what i got. and I need them correct for me to be able to use this study guide 22. G 23. H 24. C 25. J 26. A 27. I 28. E 29. D 30. F 31. B 32. False 33. True 34. True 35. True 36 I already posted what I ...
October 26, 2010

Science
PLEASE HELP Science Test Friday Study Guide? I have 1 to 22 already but I am stuck now I have to have this completed and correctly for my study guide. I have a C right now I need an A on this test to bring it up to a B or I stay on restriction please help I have been on ...
October 26, 2010

English
I need help doing the general reference for this sentence. Clarissa's four-year-old sister brought a frog inside and let it loose, which made Clarissa shriek.
October 25, 2010

Chemistry
Consider the concentration of the final solution made in two volumetric flasks. In flask A the liquid was filled to a level above the mark. In flask B the liquid was filled to a level below the mark. Describe if the final concentration of the diluted specie will be higher or ...
October 25, 2010

Physics
a plane flying at 90 degrees and 100 ms is blown toward 180 degrees at 50 ms. What is the resultant velocity and direction?
October 25, 2010

Physics
How do u know the mass?
October 24, 2010

Physics
A stone is tied to a string (length = 0.450 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the maximum tension in ...
October 24, 2010

Chemistry
Would this sound reasonable? If I test substances, then I will be able to identify the physcial and chemical changes.
October 23, 2010

Chemistry
What would be a good hypothesis for a lab in which the purpose is to identify the differences between chemical and physical changes.
October 23, 2010

Physics
A skier is gliding along at 5.0m/s on horizontal, frictionless snow. He suddenly starts down a 13 degrees incline. His speed at the bottom is 12m/s. What is the length of the incline? How long does it take him to reach the bottom?
October 22, 2010

Chemistry
If aluminum hydroxide -Al(OH)3- is an acid, why does it end with hydroxide instead of beginning with hydrogen?
October 22, 2010

Science
If CH3COOH is an acid, shouldn't it begin with hydrogen instead of ending with it?
October 22, 2010

English
Can a rough draft for a letter of application or cover letter be written front and back? Also how many lines do you skip for each topic. Thanks!
October 21, 2010

Physics
A motorboat is traveling 5m/s East, and encounters a current traveling 2.5m/s, North. If the witdth of the river is 80m wide, how much time does it take the boat to reach the other shore. I understand how to calculate the resulatant velocity, but I dont understand why you use ...
October 20, 2010

Chemistry
Determine the type of radiation: a frequency of 5.6 mhz
October 19, 2010

english
well i said the scene makes malvolio look bad infront of olivia and gives iniciative for sir.toby to act against malvolio making people believe that he is crazy and plans to put him in a dark room. but my teacher said i was summarizing and not explaining.. so what should i write?
October 18, 2010

english
what issues does the scene raise? act.3.sc.4. lines 1-150 in the book twelfth night by shakespeare
October 18, 2010

math
the perimeter of a rectangle is 147 meters the length is 15 meters less than 5 times the width find the dimension
October 17, 2010

college
I need to write a topic sentence outline from researching sources pretaining to drug addiction and also create a reference list
October 17, 2010

science
my teacher told me and my group to pick a lab we want to do? we will be working on this for 7months what can we do that wont be boring for this 7months
October 16, 2010

science
my teacher told me and my group to pick a lab we want to do? we will be working on this for 7months what can we do that wont be boring for this 7months
October 16, 2010

Math
If a ball is thrown straight up into the air with an initial velocity of 95 ft/s, it height in feet after t second is given by y=95t–16t2. Find the average velocity for the time period beginning when t=2 and lasting i) 0.1 seconds ii) 0.01 seconds
October 15, 2010

Science
how much work is donhe when a force of 25 newtons is used to slide a sofa 10 meters across a room
October 13, 2010

social studies
AN AREA WHERE THERE IS MORE LAND AND LESS BUILDINGS? 5 LETTER WORD
October 12, 2010

Physics
The battery in the circuit diagram has an EMF of 12V and an unknown internal resistance r. Voltmeter V1 is connected across the battery and voltmeter V2 is connected across the switch S. The resistance of the connecting wires and the ammeter is negligible. calculate the total ...
October 11, 2010

Physics
what do you call the source of an intense narrow beam of coherent monochromatic light?
October 11, 2010

Chemistry
Why is flushing a toilet with clean water from a municipal supply about as wasteful as flushing it with bottled water?
October 10, 2010

chemistry
thank you!
October 10, 2010

chemistry
A gas of unknown molecular mass was allowed to effuse through a small opening under constant-pressure conditions. It required 52 s for 1.0 L of the gas to effuse. Under identical experimental conditions it required 24 s for 1.0 L of O2 gas to effuse. Calculate the molar mass ...
October 10, 2010

math
i don't know if this is what you're looking for, but i got y=3x+2
October 10, 2010

Honors Pre-Cal
a) standard form is the simplest version of the equation. so the standard form would be x^2-1. (-4+3= -1) b) because this is a parabola, the vertex if the lowest or highest point on the graph. Put the equation into your calculator and (2nd)(trace)maximum or minimum to find the...
October 10, 2010

Chemistry
You have a bottle of 20% NaOH. You will use some of it to make a new solution by dilution with water. How musch 20% NaOH is needed to prepare 150mL of 7% NaOH by dilution.
October 9, 2010

Chemistry
A certain radioactive element has a half life of 1 h. If you start with a 1-g sample of the element at noon, how much is left at 3:00 PM? At 6:00PM? At 10:00 PM?
October 8, 2010

Chem
Could someone please walk me through step by step on how to do this. Propane (C3H8) burns in oxygen to produce carbon dioxide and water. C3H8(g) + 5 O2(g) 3 CO2(g) + 4 H2O(g) Calculate the mass of CO2 that can be produced if the reaction of 48.2 g propane and sufficient oxygen...
October 7, 2010

Chem
Which of the following pairs of elements are likely to form an ionic compound? lithium and chlorine sodium and potassium phosphorus and chlorine sodium and nitrogen argon and potassium
October 7, 2010

Chemistry
How would I determine the electronegativity of Ethanol?
October 6, 2010

Chemistry
An antacid tablet weighing 1.462 grams was dissolbed in 25mL of 0.8M HCl and diluted with water. The excess HCl was titrated with 3.5 mL of 1.019M NaOH solution. 1. Calculate the number of millimoles added to the tablet 2. Calculate the number of millimoles of NaOH required ...
October 4, 2010

Chemistry
How many molecules of Cl2 would be formed from the reaction mixture that produces the greatest amount of products? 4HCl + O2 --> 2H2O + 2Cl
October 3, 2010

math
the are of a is 151 square meters.whats the perimeter?????
October 2, 2010

English
Does this sound like a good thesis statement? Veterinary technicians role is challenging as well as satisfying.
September 30, 2010

English
That's suppose to be there, not their.
September 30, 2010

English
Is their anything wrong with this sentence, like grammatical errors? Veterinary technicians role is challenging as well as satisfying.
September 30, 2010

Chem
I have look and read and I still cant figure the couple out can someone please help? Number of orbital’s in the 2p subshell? And Number of electrons in 3d subshell? Number of electrons in a 3p orbital? Subshell block begins to fill after 4s2? Number of valence electrons ...
September 29, 2010

Chem
I have look and read and I still cant figure the couple out can someone please help? Number of orbital’s in the 2p subshell? And Number of electrons in 3d subshell? Number of electrons in a 3p orbital? Subshell block begins to fill after 4s2? Number of valence electrons ...
September 29, 2010

chem 1411
Mg(NO3)2 + (NH4)3PO4 predict the product and balancing the equation. Use solubility rules to predict if a precipitate is formed.
September 29, 2010

college english
I have to revise sentences to eliminate illogical or overused coordination. Are the following sentences correct? Thanks! The object of fencing is to be the first to touch the opponent five times, and a "president," who is sometimes assisted by a number of judges, ...
September 26, 2010

college english
Thanks! Ok I have another one :) I think this one is correct: Generally, a fencer specializes in one of the three weapons, but some competitors are equally skilled with all three. Is that one correct or do I need to revise it?
September 26, 2010

college english
I have to revise sentences to eliminate illogical or overused coordination. Is the following sentence correct? Thanks! Fencing equipment includes a mask, a padded jacket, and a glove, and one of three weapons-a foil,epee, or saber-and a fencer's technique and targets ...
September 26, 2010

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