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December 20, 2014

Posts by gina


Total # Posts: 520

Physics
Does the filament of a bulb have constant resistance, constant voltage or constant current? I would think it's constant current. But can someone logically explain why? I can't understand it much.
April 3, 2012

Understanding percent
65%?
March 27, 2012

11th grade math
read3books4minits. Idonotnoaboutfillchrips.butmabesomere time.readyourbooks
March 25, 2012

College Physics
nothing
March 22, 2012

Physics
In Fig. 25-37, V = 12 V, C1 = 9.8 µF, and C2 = C3 = 18 µF. Switch S is first thrown to the left side until capacitor 1 reaches equilibrium. Then the switch is thrown to the right. When equilibrium is again reached, how much charge in Coulombs is on capacitor 1?
March 19, 2012

statistics
John drives to work each morning and the trip takes an average of µ = 38 minutes. The distribution of driving times is approximately normal with a standard deviation of ó = 5 minutes. For a randomly selected morning, what is the probability that John’s drive ...
March 4, 2012

PHYSICS HELP
I got the anwser
February 16, 2012

PHYSICS HELP
A couple of astronauts agree to rendezvous in space after hours. Their plan is to let gravity bring them together. She has a mass of 66.0 kg and he a mass of 72.0 kg, and they start from rest 25.0 m apart. A)Find his initial acceleration. i put 7.68* 10^-12 m/s^2 B)Find her ...
February 16, 2012

math
How do you solve C=ln(125000000/1-125000000
January 16, 2012

algebra
write an equation in standard form that satisfies the given conditions parallel to the x-axis and through (4,-1)
January 8, 2012

finance
Templeton extended care facilities, inc is considering the acquisition of a chain of cemeteries for $ 400 million. Sice tehe primary asset of this business is real estate, Templetons management has determined that they will be able to borrow the majority of the Money needed to...
January 3, 2012

Geometry
tree is 6ft 3 in compute the cross-sectional area of the tree measured at 3 feet above ground
December 6, 2011

Grammer
Use two commas around “extra information” in a sentence to show that it is not important to the meaning of that sentence if taken out. For example: “The hardware store down the street, which had been paved recently, is open until midnight five days a week.”...
December 1, 2011

Language Arts
Hello, I have been searching the web for any info on author James B Garfield, he wrote Follow My Leader. I have to create a book jacket for my lit circle group and info on the author is needed. I have checked every site and NOTHING!! Can you help???
November 30, 2011

geometry
In a right triangle, one side is 9 units in length, and the hypotenuse is 15 units in length. What is the length of the other side?
November 15, 2011

math
a container holds 250 mL. How many liters does it hold
September 22, 2011

math
10/3+2*4=8 Insert grouping to make the equation true
September 20, 2011

physics
What is the kinetic energy of a car of mass 1900 kg moving at a constant speed of 21 m/s
September 19, 2011

science
an object is ejected sideways with a speed of 10 meters per second, a height of 78.4 meters above the ground. How long does it take to reach the ground?
September 9, 2011

physics-mechanics
a person walks 400m north along one side of a rectangular field and then 300 m along the other side, the walk takes 10 min, calculate the av. velocity of the person?
August 26, 2011

physics-mechanics
a person walks 400m north along one side of a rectangular field and then 300 m along the other side, the walk takes 10 min, calculate the av. velocity of the person?
August 26, 2011

Political Science
Need examples on a economical issues for my political science class. Anything would be helpfull. I was wondering if HIV/Aids, prostitions, discrimination, or sterotyping is a economical issues. Please give any other examples.
August 25, 2011

algebra
It is possible for a quadratic equation to have no real-number solutions. Solve. t^2+10t+26=0
July 6, 2011

algebra
Solve by factoring: 10t^2 – t − 2 = 0
July 6, 2011

Algebra
Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 4x + 4y = -36 4x + 4y = 12
July 5, 2011

english
Incense being the emotion?
May 14, 2011

Research
Heya! Where can I get photos/cartoons on dekulakisation and collectivisation? PLZ don't say google! Coz I'm not allowed to use links straight off it. Still need help with my question, a few questions below this one.
May 14, 2011

Reseach - source evaluation HELP
Hi, I've been exhausting my opportunities to try and find out the credidentials for this pdf. I need the original date of publication I need the credidentials of the author Its called Russian Collectivisation by George Beers. This is not to put in my bibliography, this is ...
May 14, 2011

Reaearch - URGENT PLZ HELP
No, its an online source. Plus my school is REALLY small. And I need my evaluation of this source in on monday. I already pasted it into my journal. Its got lots of information that I need.
May 14, 2011

Reaearch - URGENT PLZ HELP
Hi An pdf file called RUssian COllectivisation was written by a George Beers. I cant find any info on the date of publication or on the author, George Beers HELP!
May 14, 2011

General
Hey. How do I use the LOC website to find information onf the Soviet Union? Thanks
May 13, 2011

CHEMISTRY (HELP)
Which of the following is true about the reaction between sodium bromide and silver sulfate? 1. No reaction 2. Total ionic equation is identical to the net ionic equation 3. Sodium ions and sulfate ions are present in the toal ionic equation but not in the net ionic equation 4...
May 11, 2011

Chemistry
Which of the following is true about the reaction between sodium bromide and silver sulfate? 1. No reaction 2. Total ionic equation is identical to the net ionic equation 3. Sodium ions and sulfate ions are present in the toal ionic equation but not in the net ionic equation 4...
May 11, 2011

chemistry
Considering a 1.0M of each solution, which has the greatest osmolarity? 1. FeCl3 2. K2O 3. HCl 4. HC2H3O2
May 11, 2011

Speechwriting
Hey How would I go about doing a PPT, assuming that I'm delivering a speech at a conference on Waltzing Matilda. My teacher said it must not detract from the presentation.
May 10, 2011

Algebra Please Help
Math Word problem with factoring...HELP!!! This questions has me stumped!? I have been working on it for days... A 10ft-by-15ft pool was installed in your backyard. You have $3000 left that you would like to spend on surrounding the pool with a patio, equally wide on all ...
May 6, 2011

Economics
Thank-you! Do you know of any sites that specifically pertain to the airline industry?
April 25, 2011

Economics
Hey! I'm doing an assignment in which I need to research a company (Qantas)and its performance on the ASX (Australian Securities Exchange). I know that some sources of information will be the Qantas website and the ASX website but are there any other websites maybe ...
April 25, 2011

us history
What exactly do you need help with? Structure? How to frame your research?
April 25, 2011

business
You mean the four p's Product, Place, Promotion and Price
April 25, 2011

Copyright
Hey! Is it illegal under copyright law to record sections of a video so that you can use the quotes in an assignment about the video but then delete the sections after you've used them?
April 25, 2011

Speechwriting
Hi. How can I start a speech without saying goodmorning ladies and gentlemen? But not sound rude...
April 25, 2011

Solving Geometry Problem - PLEASE HELP - Test tom!
A cone has a slant height of 10 centimeters and lateral area of 60pi square centimeters. What is the volume of the sphere with a radius equal to that of a cone? -we tried solving and got 4.37 or so for the radius and we couldn't get any further than that
April 19, 2011

math
A cone has a slant height of 10 centimeters and lateral area of 60pi square centimeters. What is the volume of the sphere with a radius equal to that of a cone? -we tried solving and got 4.37 or so for the radius and we couldn't get any further than that
April 19, 2011

Chemistry
A student titrates 0.100M KOH, potassium hydroxide, into 50.0ml of 0.10M HCOOH, formic acid (Ka=1.8 x 10^-4. What is the pH of the mixture after 25.0ml of the KOH has been added
April 7, 2011

Chemistry
A student titrates 0.100M KOH, potassium hydroxide, into 50.0ml of 0.10M HCOOH, formic acid (Ka=1.8 x 10^-4. What is the pH of the mixture after 25.0ml of the KOH has been added
April 7, 2011

Math
Today, Harry mowed the lawn and weeded the garden. Usually, he mows the lawn every 6 days and weeds the garden every 4 days. How many days is it until Harry will again mow the lawn and weed the garden on the same day?
April 6, 2011

Math
Karla walks 8/10 mile to the library. About how many miles does she walk?
April 6, 2011

Chemistry
Given the following information: Ag^+(aq) + Cl^-(aq)<-->AgCl(s) Keq=1.8x10^-1 Ag^+(aq) + 2NH3(aq)<->Ag(NH3)2^+(aq) Keq=8.2x10^3 Explain why the AgCl(s) dissolved when NH3 was added to the test tube.
April 3, 2011

Roper
The length is 3.8m, the diameter is 0.19
March 24, 2011

Math
What angle equal to 6/8 turn?
March 23, 2011

math
Can you explain a little more on equivalent fractions with common denominator 3/4, 2/3, 7/8 thank you verry much.
March 21, 2011

math
Find equivalent fractions with a common denominator and order from least to grestest 1/2, 4/9, 4/18
March 21, 2011

math
Equivalent fractions 1/2,6/10,9/27,4/16
March 15, 2011

chemistry
how do you find the Kc of a reaction?
March 11, 2011

chemistry
what is the pH if you mix 250ml of 3M HCl with 500ml of 1.5M CN-? i know that: HCl+CN- ---> HCN+Cl- 250ml converts to .75 moles and 500ml also converts to .75 moles when using the 3M and the 1.5M. Ka=X^2/m-x x/1000=.015/750 .02 CN- left. 2.5*10^5=x^2/(.02-x) 2.5*10^5(x^2/(....
March 11, 2011

chemistry
At 2010K, the equilibrium constant Kc is 4*10^-4 for the following: N2+O2-->2NO If the equilibrium concentration of N2 is .28M and O2 is .38M, what is the equilibrium concentration of NO? a)1.8*10^-9 b)2.1*10^-5 c)4.3*10^-5 d)6.5*10^-3
March 11, 2011

calculus
Under what conditions for f'(x) and f''(X) can a graph be " straight" wthout being horizontal?
March 8, 2011

Chemistry
Two rigid containers of equal volume hold hydrogen and argon gases respectively at the same temperature and pressure. Which of the following statements is(are) false ? A) The two containers hold an equal mass of gas. B) The two containers hold an equal number of gas particles...
February 18, 2011

physics??
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 41.3 km/s and 52.7 km/s. The slower planet's orbital period is 7.74 years. (a) What is the mass of the star? (b) What ...
February 15, 2011

PHYSICS CIRCULAR MOTION
In an automatic clothes drier, a hollow cylinder moves the clothes on a vertical circle (radius r = 0.364 m), as the drawing shows. The appliance is designed so that the clothes tumble gently as they dry. This means that when a piece of clothing reaches an angle of è ...
February 15, 2011

physics circular arc
A motorcycle is traveling up one side of a hill and down the other side. The crest of the hill is a circular arc with a radius of 68.0 m. Determine the maximum speed that the cycle can have while moving over the crest without losing contact with the road.
February 15, 2011

physics
A 850-kg race car can drive around an unbanked turn at a maximum speed of 61 m/s without slipping. The turn has a radius of 160 m. Air flowing over the car's wing exerts a downward-pointing force (called the downforce) of 11000 N on the car. (a) What is the coefficient of ...
February 15, 2011

Physics circular motion
The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the centripetal acceleration of a person situated (a) at ...
February 15, 2011

PHYSICS
A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 27.8 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 196 m), the block swings toward the outside of the...
February 15, 2011

physics1
A 850-kg race car can drive around an unbanked turn at a maximum speed of 61 m/s without slipping. The turn has a radius of 160 m. Air flowing over the car's wing exerts a downward-pointing force (called the downforce) of 11000 N on the car. (a) What is the coefficient of ...
February 14, 2011

Physics AP
A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 27.8 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 196 m), the block swings toward the outside of the...
February 14, 2011

physics??
The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the centripetal acceleration of a person situated (a) at ...
February 14, 2011

physics!
A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is used in medical laboratories, for instance, to cause the more dense red blood cells to settle through the less dense blood serum and collect at the ...
February 14, 2011

physics (centripetal acceleration)
The second hand and the minute hand on one type of clock are the same length. Find the ratio (ac,second/ac,minute) of the centripetal accelerations of the tips of the second hand and the minute hand.
February 14, 2011

Chemistry
Reactions can be speeded by increasing the proportion of reactant molecules which collide with proper orientation. This can be accomplished by......... A)compressing the reactant mixture. B) heating the reactant mixture. C) addition of a catalyst. D) cooling the reactant ...
February 9, 2011

Chemistry
Reactions can be speeded by increasing the proportion of reactant molecules which collide with proper orientation. This can be accomplished by......... A)compressing the reactant mixture. B) heating the reactant mixture. C) addition of a catalyst. D) cooling the reactant ...
February 8, 2011

Chemistry
A student dissolves 2.57 grams of iodine [molar mass= 257]in 10.0 grams of carbon tetrachloride [kb = 5.03C/m]. The normal boiling point of carbon tetrachloride is approximately 77degreesC. What is the approximate boiling point of the solution above?
January 9, 2011

calculus
What single deposit today in an account paying 7% interest compounded continuously would yield $18500 in 10yr?
December 18, 2010

math
5,5,5,10,10,10,15,15,15,15,20
December 18, 2010

chem
Jen, I know 2.62g is NOT the answer. That is what I came up with as well but it is incorrect.
December 8, 2010

Chemistry
A 22.5 gram sample of ammonium carbonate contains ? mol of ammonium ions?
December 8, 2010

chemistry
Alkali metals react with water to form hydrogen gas and the hydroxide of the metal. When 3.55 grams of an alkali metal reacts with excess water, 1020ml of hydrogen gas, measured at STP, are evolved. What is the alkali metal?
December 6, 2010

chemistry uvu
12.75 g less than the theoretically predicted mass of 25.69 g, what is the percent yield of this reaction?
November 21, 2010

chemistry
According to the following reaction, how many grams of copper(II) chloride are necessary to form 0.984 moles silver chloride? silver nitrate (aq) + copper(II) chloride (s) silver chloride (s) + copper(II) nitrate (aq)
October 22, 2010

Physics
A solid ball of mass m and radius r rolls without slipping through a loop of radius R, as shown in the figure. From what height h should the ball be launched in order to make it through the loop without falling off the track? (Use any variable or symbol stated above along with...
October 22, 2010

Physics - Height of ball launch
A solid ball of mass m and radius r rolls without slipping through a loop of radius R, as shown in the figure. From what height h should the ball be launched in order to make it through the loop without falling off the track? (Use any variable or symbol stated above along with...
October 21, 2010

Physics
A uniform solid cylinder of mass M = 2 kg is rolling without slipping along a horizontal surface. The velocity of its center of mass is 27.6 m/s. Calculate its energy. I got 761.76 Joules but I think it's wrong.
October 21, 2010

Physics
At a county fair, a boy and two friends bring their teddy bears on the giant Ferris wheel. The wheel has a diameter of 14.0 m, the bottom of the wheel is 1.9 m above the ground and its rim is moving at a speed of 1.0 m/s. The boys are seated in positions 45° from each ...
October 14, 2010

Physics
A centrifuge in a medical laboratory rotates at an angular speed of 3500 rpm (revolutions per minute). When switched off, it rotates 70.0 times before coming to rest. Find the constant angular acceleration of the centrifuge. (Assume the initial direction of rotation is the ...
October 14, 2010

Physics
What is the centripetal acceleration of the Moon? The period of the Moon's orbit about the Earth is 27.3 days, measured with respect to the fixed stars. The radius of the Moon's orbit is RM = 3.85 · 108 m.
October 14, 2010

Physics
At a county fair, a boy takes his teddy bear on the giant Ferris wheel. Unfortunately, at the top of the ride, he accidentally drops his stuffed buddy. The wheel has a diameter of 14.6 m, the bottom of the wheel is 1.1 m above the ground and its rim is moving at a speed of 1.0...
October 14, 2010

Physics
Assuming that the Earth is spherical and recalling that latitudes range from 0° at the Equator to 90° N at the North Pole, how far apart, measured on the Earth's surface, are Copenhagen (55.67° N latitude), and Rome (41.90° N latitude)? The two cities lie ...
October 14, 2010

Physics
A man with a mass of 65 kg stands up in a 64-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the canoe and the water. How far does the canoe ...
October 14, 2010

algebra
How do I solve problems similar to: 2/3X - 1/2Y = 3
October 11, 2010

chemistry
The boiling point of water at 735mmHg is 99.073C. What mass of NaCl should be added to 3.11kg water to increase the boiling point to 100.000C. Kb for water = 0.510K kg mol-1.
October 11, 2010

math
you welcome :) glad i could help!
October 8, 2010

math
(6+6)/(6)*(6+6)=24
October 8, 2010

computers
i dont understand the formula for caluculating e^x in order to write the code(java)
October 8, 2010

computer science
I dont understand the formula :/ im writing in java
October 7, 2010

computer science
I dont understand the formula :/
October 7, 2010

computer science
Write an application that calculates the value of e^x by using the following formula:e^x=1+(x/1!)+(x^2/2!)+(x^3/3!)... Allow the user to enter the number of terms to calculate
October 7, 2010

stats
There are four major political parties in the country Treon. A public research group is interested in finding out whether there is any relationship between the party that is supported by a citizen of Treon and that citizen's socio-economic status. For the purposes of a ...
October 7, 2010

finance
cpu company currently pays a divdend of $2.50. dividends are expected to increase at the rate of $.25 per share for the next several years. determine the current rate of CPU's common stock to an investor who expects to be able to sell the stock for $35 per share after 3 ...
October 3, 2010

statistics
soo ive got the porpotion. Do i have to do anything with that or is that my answer???
September 29, 2010

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