Saturday
November 29, 2014

Posts by chris


Total # Posts: 2,244

physics
we did a lab and my observation chart is like this when my mass is 1.4 kgs (height is 0.12m,distance is 1.0m,time is 0.87s,velocity is 1.1 m/s ,Eg is 1.6 and the Ek is 0.85) when my mass is 2.14 kgs(height is 0.12m,distance is 1.0m,time is 0.88s,velocity is 1.1 m/s ,Eg is 2.8 ...
November 24, 2014

Maths
I have 40 questions, 4 marks given for a correct answer, 2 marks deducted for each wrong answer and 1 mark deducted for for each answer not attempted I attempt 19 and score 25 marks.how many questions did I get right
November 18, 2014

algebra
student takes out two loans 1 at 10% and the other at 12 percent interest the 10 percent loan is $2000 more then the 12% loan and the total interest for one year is $430 how much is each loan?
November 17, 2014

Science
True/false Earth's atmosphere oceans and continents began to form during the first several hundred million years of the Precambrian time.
November 17, 2014

Chemistry
Dr. Bob, I am unable to see the answer you have provided? I'm not sure why, but I see "Bob Pursley answered your first post. It's below." The problem is, the is no post below.
November 13, 2014

Chemistry
I missed a few days of school due to a sick child. I'm reviewing for an exam and the following questions are giving me trouble as I wasn't there when they were reviewed in class. If possible, I need the answer and step-by-step process so I can see what what to do and ...
November 13, 2014

Chemistry
Thank you so much. This is sure to be very helpful!
November 13, 2014

Chemistry
Ah, this is what it means "below". In the second question I posted (above I guess) I rephrased my question for answer and all work. I'm really confused as to what your provided answer means as I missed these classes. I honestly have no idea what to make of the ...
November 13, 2014

Chemistry
I missed a few days of school due to a sick child. I'm reviewing for an exam and the following questions are giving me trouble as I wasn't there when they were reviewed in class. If possible, I need the step-by-step process. Thanks. 1.) If you put hydrogen peroxide on ...
November 13, 2014

sixth grade math
How to express 12/15 as a fraction, percent, and decimal. Someone please show me how to solve.
November 12, 2014

sixth grade math
The poster shows 12/15 games won so far. I need help on how to express as a fraction, percent, and as a decimal.
November 12, 2014

sixth grade math
The poster shows how many of its games the football team has won so far. Express this information as a fraction, a percent, and as a decimal. Can someone show me how to solve this problem?
November 12, 2014

physics
A 4.5 kg block is dropped onto a spring of spring constant 1861 N/m from a height of 1500 cm find the speed of the block when the compression of the spring is 12 cm. The acceleration of gravity is 9.81 m/s
November 12, 2014

History
What is the national monument of America?
November 12, 2014

Physics-coefficient of friction
What's the minimum coefficient of friction between the ladder (of length d) and the ground will keep it from slipping? (consider the wall frictionless) (θ=56.5 degrees) I think the formula is supposed to be mg L/2 sin y, but it does not provide a length, nor a mass. ...
November 11, 2014

Physics- tension
An 63 kg construction worker is sitting 2.0 m from the end of a 1435 kg steel beam to think about the state of the world. Find the tension in the cable that is supporting the beam. Am I required to use the formula T1=sin(theta)*m*g? I am not sure if the problem is similar to a...
November 11, 2014

Physics- spring constant
Astronauts are in space so there is no gravity, but they wish to weight themselves. The spring constant is 265 N/m. The question shows a graph; the y is the position in meters while the x is the seconds. I do not wish for an answer, but the way in which i'm supposed to ...
November 11, 2014

Math
A sea turtle laid 95eggs,each weighing 1 ounce.what is the total amount of weight in pound?
November 10, 2014

English
What is a metaphor for improvement?
November 10, 2014

Physics
A. You drag a suitcase of mass 19 kg with a force of F at an angle 41.3 degrees with respect to the horizontal along a surface with kinetic coefficient of friction 0.54. The acceleration due to gravity is 9.8 m/s^2. What is the normal force on the suitcase? Answer in units of ...
November 6, 2014

physics-distance
Here's a stationary bike. If you pedal such that the front wheel rotates at 6.9 rad/s, and that wheel's radius is half a meter, how far would you have gone in 35 minutes, if the bike where a non-stationary bike? (Assume a constant speed of rotation) I am not sure where...
November 4, 2014

science
Using the systematic method and information in the Appendices F and J (note that log value is given in Appendix J), determine [SCN-], [Hg2+], and [HgSCN+] at equilibrium when Hg(SCN)2(s) is dissolved in water.
November 4, 2014

chemistry
Propose methods for protecting the sodium hydroxide solution in the bottle and the buret from exposure to carbon dioxide in the air.
November 3, 2014

Math
A woman has money in two accounts. One account pays 7% annual interest, whereas the other pays 15% annual interest. If she has $1,500 more invested at 15% than she does at 7% and her total interest for a year is $1,545, how much does she have in each account? Please show the ...
November 1, 2014

physics
A skier leaves the starting gate at the top of a ski ramp with an initial speed of 4.00 m/s (Figure 6-41). The starting position is 120 m higher than the end of the ramp, which is 3.00 m above the snow. Find the final speed of the skier if he lands 145 m down the 20.0° ...
October 31, 2014

english
the air was thick and grey what else???
October 29, 2014

english
how can i describe polluted air using imagery
October 29, 2014

grammar
thanks
October 29, 2014

grammar
oops sorry that was a typo, it's supposed to be filled. "his eyes swollen and were filled with tears" OR his eyes suddenly got swollen and were filled with tears"
October 29, 2014

grammar
Does this sentence make sense? "His eyes swollen and were felled with tears."
October 29, 2014

Chemistry
Thanks
October 29, 2014

Chemistry
A sample of methane (CH4) gas contains a small amount of helium. Calculate the volume percentage of helium if the density of the sample is 0.70902 g/L t 273K and 1.00 atm. I know that the sample is at STP and that the 1 mole of gas under these conditions occupies 22.4L, but ...
October 29, 2014

chemistry
Just treat the 82.2 kJ as a product of the reaction and use stoichiometry to found out how many moles of methane were used like so... 82.2kJ x 2mol CH4/252.8 kJ = ? Then just multiply by the molar mass of methane (about 16.042g) to find how many grams of methane gas are ...
October 29, 2014

Physics
A 10 kg box is held 2 meters up a ramp that is inclined at 35 degrees. It is released frpm rest, slides down the ramp and across the floor. the coefficient of friction is 0.15. How far along the floor will the box slide?
October 8, 2014

Social Studies
thanks Ms. Sue
October 7, 2014

Social Studies
which of the following best describes the purpose of the U.S constitution? A. It restricts rights of citizens. B. it outlines how the government should make laws. C. it establishes a national bank. D. it outlines basic rights for the people of all nations of the world. B
October 7, 2014

chemistry
1. A sample weighing 1.30 mg was analyzed to determine the concentration of a certain compound (FW =292.16 g/mol) using UV/Visible spectrometry. First, the sample was dissolved in 5.00 mL volumetric flask. A 1.00 mL aliquot was drawn up, placed in a 10.0 mL volumetric flask ...
October 2, 2014

Analog Electronics
A 50mV signal is applied to the base of a properly biased transistor with r'e=10ohms and RC=560ohms. Determine the signal voltage at the collector. In my text book for this section there are formulas Vb=Ier'e Vc=IcRC Vc=IeRC Do I take 50mV/560ohms to get Ic then take ...
October 1, 2014

Western civilization
What development marked the start of the Archaic Age in Greece?
September 29, 2014

eng
the chances of something that is going to happen to u is really small ex:death
September 28, 2014

eng
name something so small that you won't expect it to happen ex: death
September 28, 2014

math,algebra
(3^-1X^3)^2 x 12X^5 my work: 3/2X^6 x 12X^5= 36/2=18X^11 but the answer was 4/3X^11
September 23, 2014

Math
For N balls, m are black and the rest white,what is the probability that in the first n balls from N, 1 of them are black. Here m< N.
September 18, 2014

social studies check
Hernado de Soto's mission accomplishes its original objectives. True or False? I think true but I'm not sure
September 17, 2014

social studies check
Ok Thanks
September 17, 2014

social studies check
Which of the following most contributed to the decline of Native American culture following the arrival of the Europeans? A. warfare B. enslavement C. relocation D. disease I think D?
September 17, 2014

social studies check
So whats the answer?
September 17, 2014

social studies check
In which period of Native American history did permanent settlements develop for the first time? A. Paelo-Indian B. Archaic C. Woodland D. Mississipian Is the answer B?
September 17, 2014

social studies check
1. Which of the following is NOT a reason that Oglethorpe and the trustees wanted to start the colony of Georgia? A. to help the poor who could not pay their bills B. to help the englich economy C. to form large plantations D. to provide defense I think B?
September 17, 2014

Social Studies
srry A
September 15, 2014

Social Studies
Politics most informs a person's actions in? A.civic life B. work life C. private life D. school life
September 15, 2014

Social Studies
Pete's peanuts wants to grow its overall prouctivity.which investment would best help the company achieve this goal? A. a larger building to store its peanuts. B. better advertiements for its products. C. new uniforms for company employees. D. an improved roasting and ...
September 15, 2014

Social Studies
which of these actions would most help a worker improve her productivity? A. finding a new job in a different field. B. taking a training course related to her job. C. buying a laptop computer for home use D. asking her employer to give her a raise i think D
September 15, 2014

Social Studies
which of these people is an example of an entrepneur? A. Malia started selling jewelry she made in an online store. B. Liam found a summer job walking dogs in his neightborhood. C. Pavel worked hard to learn to speak a foreign language. D. Ophelia took classes in painting and ...
September 15, 2014

Social Studies
yes thanks
September 15, 2014

Social Studies
how are interest rates and wages similar? A. both rise due to inflation B. both are types of prices. C. both relate to the cost borrowing D. both are payment for work done i think B
September 15, 2014

Social Studies
how are interest rates and wages similar? A. both rise due to inflation B. both are types of prices. C. both relate to the cost borrowing D. both are payment for work done i think B
September 15, 2014

PHYSIC
what is the horizontal distance a slingshot on a 25 m cliff will shoot if it's initial velocity is 240 m/s and it's inclined at 45 degrees y = 25 + 9.8/(240cos45)^2) x^2 ? ^^would this be the right formula?
September 14, 2014

Science
If you are riding your bike and hit a curb and stop suddenly at 25m/s when you hit the curb and it took you only .75 seconds to stop after hitting the curb. What was your acceleration?
September 13, 2014

social studies check
what is the most likely effect on a person's income if he or she has little education and few skills? A. the person's income will vary greatly. B. the person's will earn a high income. C. the person's income will decline over time. D. the person's will earn...
September 12, 2014

Social Studies
Which of these goods and services is paid for with federal taxes? A. community roads. B. military bases C. public universities D. police protection. i think B
September 11, 2014

Social Studies
The government must provide some goods and services because? A. they are too expensive for entrepreneurs to provide. B. demand for them is greater then supply. C. private producers have no incentive to do so. D. not many people are interested in buying them. i think B
September 11, 2014

Chemistry - dilutions
The concentration of stain in the bottle was 5% and you added 100 microliters of it to 9.9ml of a buffer to make a working dilution of stain. You then combined 10 microliters of that diluted stain with 40 microliters of your diluted cells and put a few microliters of that ...
September 11, 2014

chemistry
at 17.9 degrees celsus ethyl ether has a vapor pressure of 400 torr. What is the mole fraction of ethly ether in a solution which has a vapor pressure of 380 torr, if the solute is non-volatile at 17.9 degrees celsus?
September 9, 2014

Statstics
Let's pretend the Work variable is normally distributed, with a mean/median/mode value of 22 and a standard deviation of 17. Based on these numbers, we can say that approximately 50 percent of SOC 390 students work more than ____ hours per week (round answer to the nearest...
September 9, 2014

P.E
in order to make healthy choice, you must learn to_________risks. A. ignore B. advocate for C. evaluate D. take more. i think its B
September 8, 2014

P.E
The way in which your emotions affect your physical and overall health is part of? A. setting goals B. heredity C. the mind-body connection. D. your cultural environment. I think its c
September 8, 2014

Statistics
Let's pretend the Work variable is normally distributed, with a mean/median/mode value of 22 and a standard deviation of 17. Based on these numbers, we can say that approximately 50 percent of SOC 390 students work more than ____ hours per week (round answer to the nearest...
September 8, 2014

Statistics
Let's pretend the Work variable is normally distributed, with a mean/median/mode value of 22 and a standard deviation of 17. Based on these numbers, we can say that approximately 68 percent of SOC 390 students work between ______ and ______ hours per week.
September 8, 2014

math proportions
what are you solving for? x?
September 8, 2014

geometry
1/8uw +1/8vw
September 7, 2014

P.E
B.
September 5, 2014

P.E
all of the traits passed biologically from parent to child are known as? A. risk factors. B. behavior. C. heredity. (D.) environmental influences.
September 5, 2014

Pre-Calc
The peak of a mountain is observed from the base and from the top of a tower 180 ft high. Find the height of the mountain above the base of the tower is the angles of elevation of the peak are 21 degree 35’ and 24 degree 48’
September 4, 2014

Math
How can you make 83c using only pennies, nickels,dimes ,or quarters
September 3, 2014

physics
A spherical shell is formed by taking a solid sphere of radius 20.0 cm and hollowing out a spherical section from the shell's interior. Assume the hollow section and the sphere itself have the same center location. a) If the hollow section takes up 90% of the total volume...
September 2, 2014

math
a man is 68 inches tall and casts an 8 foot shadow. A tree casts a 21 foot shadow, how tall is the tree
September 1, 2014

Science
Having scientic literacy involves being able to? A. ask scientific qustions. B. evaluate scientic information. C. understand scientific terms. D. all the above. i think C.
August 28, 2014

Science
help fastwhich of the following statements incorrectly describes a tool used by scientists? A. A compound light microscope enables a scientist to view objects too unaided eye to see. (B).A beaker is a type of glassware a scientist uses in the lab to record data. C. A scale is ...
August 28, 2014

Science
which statement best describes the benefit of having a universal system of measurement? A. Scientists from different counties can more easily shared and compare data from experiment. B. Scientists who speak difference languages do not have to translate each others work into ...
August 28, 2014

Science
which statement best describes the benefit of having a universal system of measurement? A. Scientists from different counties can more easily shared and compare data from experiment. B. Scientists who speak difference languages do not have to translate each others work into ...
August 27, 2014

Science
which of the following describes scientific inquiry?(1 point) A.a statement that describes what scientists expect to happen in experiment. B.facts,figtures,and other evidence gathered through observation. (C).the diverse ways in which scientists study the natural world. D.a ...
August 27, 2014

Science
which of the following describes scientific inquiry?(1 point) A.a statement that describes what scientists expect to happen in experiment. B.facts,figtures,and other evidence gathered through observation. (C).the diverse ways in which scientists study the natural world. D.a ...
August 27, 2014

P.E
Visiting your doctor for regular check-ups is an example of which step you might take to meet take to meet your health goals? A. gain awareness. (B). gain knowledge. C. build health skill. D. set goals.
August 26, 2014

P.E
100 % i know is it D
August 26, 2014

P.E
Ms.Sue is it c.
August 26, 2014

P.E
Your friend spends most of his free time eating junk food and playing games on the computer. which way on the health continuum is moving? A. wellness B. long life expectancy C. illness D. obesity i think A
August 26, 2014

P.E
thanks
August 26, 2014

P.E
The health triangle is made up of(choose all that apply)? 3 points A. Monetary health. (B.) social health. (C.) physical health. (D.)mental and emotional. thats what i think. help fast. choose three.
August 26, 2014

math
kevin has a rabbit,a ferret, a gerbil, and a turtle.he feeds them in a different order each day.in how many different orders can kevin feed his pets?
August 25, 2014

math
kevin has a rabbit,a ferret,a gerbil,and a turtle.he feeds them in a different order each day.in how many different orders can kevin feed his pets?
August 25, 2014

math
yancey collects plastic banks.he has three different banks:a pig,a cow,and a horse.how many wayscan yancey arrange his banks on a shelf
August 25, 2014

Physics
The speed of an arrow fired from a compound bow is about 57 m/s. An archer sits astride his horse and launches an arrow into the air, elevating the bow at an angle of 54 above the horizontal and 2.3 m above the ground. What is the arrow's range?
August 22, 2014

math
32 gal/min = qt/h
August 21, 2014

physics
A toy rocket, launched from the ground, rises vertically with an acceleration of 32 m/s^2 for 4.1 s until its motor stops. Disregarding any air resistance, what maximum height above the ground will the rocket achieve? The acceleration of gravity is 9.8 m/s^2. Answer in units ...
August 17, 2014

math
2 times{(300-90 divided by 5)-[3 times 26-(8-2 times 3
August 16, 2014

math
Thanks. Thats what I thought.
August 13, 2014

math
If A is 25% more than B, the B is ? less than A. A. 10% B. 15% C. 20% D. 25%
August 13, 2014

physics
an object moving on the x axis with a constant acceleration increases its x coordinate by 108 m in a time of 9.5 s and has a velocity of 20 m/s at the end of this time. Determine the acceleration of the object during this motion?
August 10, 2014

Physics
A train is moving parallel and adjacent to a highway with a constant speed of 28 m/s. Initially a car is 29 m behind the train, traveling in the same direction as the train at 42 m/s and accelerating at 3 m/s^2. What is the speed of the car just as it passes the train?
August 8, 2014

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