Tuesday
September 27, 2016

Posts by catherine

Total # Posts: 404

MAth Trig
yeah the diameter is actually 165/π cm just multiply it next time glad i can help
July 26, 2016

science
Just multiply the optical fibres by the guiding liquid and you will get the answer for the glass block.
July 26, 2016

CHECK my world history answers
Ur wrong
May 31, 2016

KOREA
Korean schools however and school children are expected to learn 2,000 characters by the end of high school. In South Korea school children are expected to learn 1,800 hanja by the end of high school. The proportion of hanja used in Korean texts varies greatly from writer to ...
May 25, 2016

KOREA
Korean 한글자모 / 조선글 Korean is spoken by about 63 million people in South Korea, North Korea, China, Japan, Uzbekistan, Kazakhstan and Russia. The relationship between Korean and other languages is not known for sure, though some ...
May 25, 2016

CHECK MY WORLD HISTORY ANSWERS
1 star* at the end of each question and multiple stars*** at the end of my answer 1. Which laws called for strict separation of the races in the South? * anti-discrimination laws Plessy v. Ferguson laws Jim Crow laws**** Boycott Laws 2. All of the following were results of the...
May 24, 2016

Chemestry
A 5.000g sample of a dry mixture of potassium hydroxide, potassium carboate and potassium chloride is reacted with 0.100 L of 2.00-molar HCl solution. A 249.0 mL sample of dry carbon dioxide gas, measured at 22.0 degree Celsius and 740.0 torr, is obtained from this reaction. ...
May 13, 2016

Physics
A 0.32 kg box of macaroni is held in place at the front of a 3.31 kg shopping cart only by the force of static friction as the shopping cart accelerates. Determine the minimum acceleration, in m/s 2, that the shopping cart must have if the box is to be kept from falling if the...
April 21, 2016

Physics
A particular Ferris wheel takes you through one complete revolution every 25.3 seconds. If the radius of the Ferris wheel is 10.4 m, and your mass is 63.3 kg, calculate: (a) Your apparent weight, in N, when you are at the top of the Ferris wheel. (b) Your apparent weight, in N...
April 21, 2016

Physics
A 2 kg block is resting on a 37 degree frictionless inclined plane, attached by a string to a frictionless pulley at the top of the plane, over which a second mass of 3.3 kg hangs down. Find the magnitude of the hanging mass’s acceleration.
April 21, 2016

Physics
A powered model airplane of mass 1.7 kg is tied to a ceiling with string and allowed to fly at speed 0.21 m/s in a circular path of radius 0.86 m while suspended by the string which makes a constant angle with respect to the vertical. (a) What is the angle, in degrees, that ...
April 21, 2016

Physics
A 410 kg race car is rounding a curve in the road which is banked at an angle of 23.4 degrees from the horizontal. Assume that there has just been a massive snowfall and the road’s surface is frictionless. What must the radius of the curve be if the car is travelling at a...
April 21, 2016

Physics
A small disc of mass 0.7 kg is attached to a string on a frictionless table top. The string passes through a small hole in the centre of the table and is attached to a mass of 0.68 kg suspended below the table and above the floor. The disc can thus move in a circular path with...
April 21, 2016

Physics
A 570 kg truck is carrying a large 1.9 kg box on its cargo deck when it starts to accelerate. If the coefficient of static friction between the box and the truck’s deck is 0.26, what is the maximum acceleration, in m/s 2, that the truck can have without letting the box slip?
April 21, 2016

math
in greatest to least what is 0.1 0.125 and 0.12? i cant figure it out i think you need to convert to fractions im just not sure.
February 22, 2016

Chemistry
If you reacted 100.0 g of carbon tetrachloride (CCl4) with excess antimony fluoride (SbF3), how many grams of carbon dichloride difluoride would be produced?
December 11, 2015

Physics - Please Check Answers ASAP
Please check these over and see if any are incorrect? 1. The units of speed are: a) m/s ---> my answer b) m/s^2 and direction c) N d) m/s and direction 2. Which of Newton's Laws says you cannot touch anything without being touched? a) 4th b) 2nd c) 1st d) 3rd ---> my...
October 25, 2015

Physics
A wet bar of soap slides down a ramp 9.4 m long inclined at 8.0∘ . How long does it take to reach the bottom? Assume μk = 0.064.
October 22, 2015

Maths
If alpha amd beta are zeroes of polynomial x^2+8x-6 form the polynomial whose zeroes are 1 /2alpha and 1/2beta.
October 2, 2015

Science
It is very simple just subtract the final volume from the initial volume, you will get the volume of the solvent that you add to the make the solution dilute (V2 - V1). If you do not know how to find the final volume, then you need to use the formula C1V1 = C2V2 Substitute all...
August 22, 2015

math
at the video store where you work the dvd cases are 5/8 of an inch wide. New shelf units are available that have 6 40-inch shelves. How many dvd should fit on a 6-shelf unit?
August 13, 2015

Physics
A car is going 18.3 m/s down a road. At time t=0s, a squirrel runs in front of the car 36 meters away. It takes the driver t=0.67s to slam on the brakes, but after that , the brakes offer a frictional force F(fr)=21000N. Her car masses at 1860 kg. a) How far does the car ...
May 17, 2015

life orintation
topic is campaign with responsibility
May 10, 2015

Chemistry
I already figured out the answer for b) However, can anyone helps me with a)?
March 24, 2015

Chemistry
Step 1: A 12.70mL sample of cyanide solution was mixed with 25.00mL of a solution of nickel ions at an appropriate pH to form the Ni-cyanide complex. The resulting solution was titrated cs 0.0130M EDTA and required 10.10mL to reach the end point. Step 2: Then 30.00mL of the ...
March 24, 2015

Analytical Chemistry
No, I am sorry. This is the first time I have posted this question. Where can I find the similar question?
March 24, 2015

Chemistry
Given that 12.25 g of aluminum sulfide is reacted with excess water. How many grams of aluminum hydroxide can be obtained? The molar mass of aluminum sulfide is 150.0 g and the molar mass of aluminum hydroxide is 78.0 g.
March 14, 2015

Chemistry
Suppose 0.500 g of sulfur combines with 1.00 g of copper. What is the empirical formula of the compound? The atomic mass of sulfur is 32.065 g and the atomic mass of copper is 63.546 g.
March 14, 2015

chemistry
When you add 0.320 g of sodium metal to an excess of hydrochloric acid, you find that 3330 J of heat are produced. What is the enthalpy of the reaction as written below? 2Na(s) + 2HCl(aq) --> 2NaCl(aq) +H2(g
March 9, 2015

Math
How do you go about solving this? If you got paid $15 for 3 hours of work one day and $45 for 8 hours of work on another day, find your hourly rate of pay for the 2 days
February 19, 2015

science
an arrow is fired directly horizontal off a cliff that is 10.0 meters tall with a velocity of 65.5 m/san arrow is fired directly horizontal off a cliff that is 10.0 meters tall with a velocity of 65.5 m/s. How long is the arrow in the air?
February 2, 2015

calculus
A trough is 9 feet long and 1 foot high. The vertical cross-section of the trough parallel to an end is shaped like the graph of y=x4 from x=−1 to x=1 . The trough is full of water. Find the amount of work in foot-pounds required to empty the trough by pumping the water...
January 29, 2015

International students
Just multiply it.
December 4, 2014

Chemistry
How do you set up this problem? Calculate the volume , in ml of a 0.150 M NaOH soulution needed to neutralize 25.0ml of a 0.288 M HCl solution?
November 23, 2014

Chemistry
Calculate the mass of NH4NO3 salt that should be combined with 100.0 mL of water to obtain a temperature decrease of exactly –15.0C? Delta H of the solution = 24.13 Ccal = 21.12 Csh2o = 4.18 average Qrxn = 1151.6 I dont understand how to solve it
November 19, 2014

Science 8
A copper bracelet is placed in a graduated cylinder full of water. The water level rises from 15.6 ml to 28.0ml. The mass of the bracelet is 101.7g. Is the bracelet made of pure copper? How would I know? How would I explain?
November 17, 2014

statistics
It is known that 10 % of a school's athlete population uses drugs. The Athletic Director gives a drug test which registers correctly as positive in 82 % of the cases where the drug is present and correctly as negative in 96 % of the cases where the drug is absent. One ...
November 10, 2014

Language Arts
What is the theme of the book catching jordan?
October 27, 2014

math
1. He wants 1/2 pound of chicken so one complete serving. The remainder is 1/4, half of a half is one fourth so the answer is 1 and a half servings. 2. (n ×3/2) ×2 n being the original amount the recipe calls for 3. Use the formula to solve 4.yes oregano, no for ...
October 27, 2014

math
This is a floor plan of a building that is 8m tall. It has a flat roof. What is the surface area of the building including the roof. The floor plan is starting from the left the side is 18m the bottom is 27m the right side is 22m. The top looks weird butits like three sections...
September 15, 2014

math
The cost of a DVD is $18.75. Added to this cost is 12% before tax fee. 5% GST, 7% PST. What is the total cost?
June 24, 2014

math
The cost of a DVD is $18.75. Added to this cost is 12% before tax fee. 5% GST, 7% PST. What is the total cost?
June 23, 2014

economics
A monopoly firm is faced with the following demand function P = 13 – 0.5Q The Marginal Cost function for the firm is given by 3 + 4Q and the total fixed cost is 4 Determine 1. The the profit maximizing output 2.The level of supernormal profit if any 3. The output level at...
June 21, 2014

Shurley English
Please help to classify: Before dinner Terry and I played a quick game of cards.
May 27, 2014

computer assisted legal research part 2
There seems to be 2 answers to #11 of exam #00803701. Not sure which one to use
May 7, 2014

us history
Explain how wwII promoted an awareness of the links between racism in the US and coloniasm around the world. (in a long essay please)
March 29, 2014

Physics
Water is boiled by burning coal. The resulting steam blows agains huge turbine blades. The turning blades spin in a magnetic field, producing electricity. Describe in order the energy conversions.
March 24, 2014

Physics
If the fundamental frequency of an 70 cm long guitar string is 470 Hz, what is the speed of the traveling waves?
February 17, 2014

Maths literacy,life science,geography and economics
i wanna know which career path i cn work
February 4, 2014

Physics
The acceleration of a particle moving only on a horizontal xy plane is given by , where is in meters per second-squared and t is in seconds. At t = 0, the position vector locates the paticle, which then has the velocity vector . At t = 3.60 s, what are (a) its position vector ...
February 3, 2014

Physics
A severe thunderstorm dumped 2.4 in of rain in 30 min on a town of area 35 km2. What mass of water (in kg) fell on the town? One cubic meter of water has a mass of 103 kg.
February 2, 2014

Physics
Grains of fine California beach sand are approximately spheres with an average radius of 50 μm and are made of silicon dioxide, which has a density of 2.4 × 103 kg/m3. What mass of sand grains would have a total surface area (the total area of all the individual ...
February 2, 2014

math
Kim decided she want to put a continuous trim along the top of the walls around the 10 ft. by 10 ft. rectangular room. How long a piece of trim must she buy?
January 27, 2014

SCIENCE (Drugs)
Dopamine. The neurotransmitter plays an important role in addiction, and acts as adrenaline and affects the ability to feel pleasure and pain, emotional response and movement control. Drugs can affect these abilities by either stimulate or fail to stimulate the receptors of ...
November 25, 2013

Business 101
1. Carmen Santiago works for a number of businesses as a “consultant.” She has helped design accounting systems, provided accounting services, and analyzed the financial strength of her clients’ businesses. Carmen is working as a A. public accountant. B. ...
November 17, 2013

K math
What is the factor of 2?
October 9, 2013

Calculus
Given a power function of the form f(x)=ax^n, with f'(3) = 14 and f'(6) = 28, find n and a.
October 8, 2013

Literature
What does this poem mean? What is th symbolism? Literary devices? Nothing Stays Put Amy Clampitt The strange and wonderful are too much with us. The protea of the antipodes--a great, globed, blazing honeybee of a bloom-- for sale in the supermarket! We are in our decadence, we...
September 16, 2013

MATH
For each of the following angles, find a coterminal angle with measure (theta symbol) such that 0 degrees is greater than or equal to theta symbol < 360 degrees. a) -100 degrees. I really do not understand how to work this problem and I need help
August 19, 2013

Math
For each of the following angles, find a coterminal angle with measure (theta symbol) such that 0 degrees is greater than or equal to omega symbol < 360 degrees. a) -100 degrees. I really do not understand how to work this problem and I need help.
August 19, 2013

physics
A 1.0-m thin rod of aluminum is laid end-to-end with a 1.0-m thin rod of steel. The rods are initially at 25 oC. What is the total length of both rods when heated to 450 oC?
July 29, 2013

Chemistry
Yes I would be thank you!!
July 12, 2013

Chemistry
I had to calculate delta G which came out to be 10.30 then i had to solve for Kp so I used the equation DeltaG=-RT(ln Kp) then I got .01565, now im trying to calculate the equilibrium pressure of O2 and that has me stumped.
July 12, 2013

Chemistry
Consider the decomposition of a metal oxide to its elements where m represents a generic metal. M2O(s)<->2M(s)+1/2O2(g) the delta G is 10.30 I need to find K and PressureO2 at 298K I know the equations but i keep getting the answer wrong could you please help me. Could ...
July 12, 2013

Math
Alec, Kate and Ketan are roommates who share living expenses in a ratio of k: 2a: 5k respectively. If their total expenses each month equal $1400, how much is Ketan's monthly contribution? (A) 280/2a+6k (B) 700/2a+6k (C) 1400k/2a+6k (D) 2800a/2a+6k (E) 7000k/2a+6x Please ...
June 25, 2013

Chemistry
What's is the concentration of silver ions in a saturated solution of silver carbonate? The k^sp of Ag2CO3 is 8.1x10^ -12. Is the answer 5.88x10^-8? I have a test tomorrow and I really need to make sure I'm doing these problems right, but I feel like I am not.
May 9, 2013

Chemistry
Calculate the concentration of bromocresol green (BG) indicator It says that Molar absorptivity = Absorbance at a wavelength/ concentration of BG indicator I am having trouble calculating the concentration of BG. Other info: Stock solution of BG = 80.0 mg/L and molar mass = ...
April 25, 2013

Chemistry
Four particles have free access to distribute into four different energy levels 0,5,10, and 20J. If these four particles are to create two macrostates having total energies 10J and 40J, which macrostate has more entropy?
April 18, 2013

chemistry
Suppose you do not know the enthalpy of decomposition of the process: CaCO3 = CaO + CO2 Explain in terms of thermodynamic parameters why heating to a high temperature might turn this decomposition to a spontaneous process.
April 18, 2013

Chemistry
Mopping the floor in a dry weather makes the floor dry quickly although detlaG0 for the water vaporization at room temperature is positive. Explain.
April 18, 2013

chemistry
find the molality of a salt-water solution containing 0.27 mol NaCl in 150 g water.
April 7, 2013

chemistry
what mass of K2SO4 would you measure out to prepare 350 mL of a .76 M solution? The gram formula mass of K2SO4 is 174.2 g/mol
April 7, 2013

Science
What pumps blood
March 30, 2013

physics
Av/sp = 20 10 = 2m/s
March 30, 2013

Math
Austin is in his pedal boat. It takes him 1.5 hours to travel 12 miles downstream and 6 hours to return. What is the rate of the current? Please show me how to solve it as well, I really have no idea. Thanks.
March 10, 2013

chemistry
A lab technician determines the boiling point elevation of an aqueous solution of a nonvolatile, nonelectrolyte to be 1.62°C. What is the solution's molality?
March 3, 2013

Math calculus
Which box is bigger the 10*4*1 or the 6*4*3 box. Thanks.
March 3, 2013

Math
Please help me factor this, I just can't get it to work. -12x^2 - 35x - 18 Thanks!
March 3, 2013

Math
Store B has the best price. A sells for $14 per CD B sells for $13 per CD
December 19, 2012

Custer's Last Stand
I have only been around for two research days for this big project on Custer's Last Stand, and I have some information and a LOT of books, but I need quick, straightforward info that I can work around. Any solid information you know pertaining to details of Custer's ...
December 19, 2012

math
I was wondering if someone could double check my work on a test I'm self correcting. Here's the problem, it has to do with Cramer's Rule. 24x + 6y = 11 24x + 60y = -25 I ended up finding the base determinant (D), and then dividing Dx and Dy by D. My answers for Dx ...
December 19, 2012

Math
How do I find the measurement of side CDin the quadrilateral WVUT if the midpoints are F,E,D,C and WU =45 in. and TV = 31 in.?
November 14, 2012

Philosophy (arguments)
further develop the following argument: communities in which people spend a lot of time socializing with their friends and neighbors are stronger than other communities. when people have televisions they spend less time socializing with their friends and neighbors. Therefore, ...
November 11, 2012

Physics
When we lauch a space shuttle will it go with Earths rotationor would it go opposite?
October 31, 2012

physics
The shock absorbers in the suspension system of a car are in such bad shape that they have no effect on the behavior of the springs attached to the axles. Each of the identical springs attached to the front axle supports 294 kg. A person pushes down on the middle of the front ...
October 17, 2012

Chemistry
Which of the following transition metal ions has a color? Cr3+ , hg2+, v2+ How can you predict that? I don't understand!!
October 14, 2012

world history
You're right. I'm Buddhist. I should know.
October 6, 2012

Math
But the problem says the sum of the ages is 70. And yeah, it is what you could call "unusual." It's really confusing. I think that maybe the question was just typed wrong, and I'm going to ask about it on Tuesday. Thanks for the help, though! At least I know ...
October 6, 2012

Math
The sum of the ages of Monica and her mother is 70. Monica is 4 less than 1/2 her mother's age. Find their ages. I've been trying to do this for the past 20 minutes. I think the question is wrong, but try for yourself. Help please!
October 6, 2012

History
Thank you so much! I really needed it and my textbook didn't have it! Thank you!
September 25, 2012

History
When was Williamsburg, VA founded? And I don't mean when it became the capital of Virginia, I mean when was it created. People keep saying different things, but I'm pretty sure that it's either 1633 of 1632. Please help me! This is for a project.
September 25, 2012

math
how to count how long of $5000 at 7% interest compounded for the investment to increase to 10000? it will be awesome if you can put the way
September 2, 2012

Math
Thanks Damon!
August 29, 2012

Math
If 6 is increased by 4 times a number, the result is 68. A.Write and equation for this situation. B. Solve for the answer. I got 6+4x=68 for the equation, but I'm not sure whether or not x=15.5, or if that is what the question wants me to find. Help please!
August 29, 2012

Math
There are 300 students in the junior class at a high school. -100 students participate in theater. -70 students are involved in chorus. -140 students play a sport. -35 students are in chorus and are involved in theater, while 15 students play a sport and participate in theater...
August 22, 2012

English
Yay! Thanks so much!
August 21, 2012

English
Umm.... He told me? So it would be 'told my brother and me'?
August 21, 2012

English
Is this sentence correct? If not, could you point out what part is not correct? As an incentive to attend the local college, our father told my brother and I that we could use his company car for transport.
August 21, 2012

Chemistry
What are two reasons for precise but inaccurate measurements?
August 20, 2012

english
why did james welch write fools crow
August 11, 2012

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