Wednesday
September 17, 2014

Posts by John


Total # Posts: 6,239

physics
A monatomic ideal gas is thermally insulated, so no heat can flow between it and its surroundings. Is it possible for the temperature of the gas to rise? If the temperature can rise, how does it rise?
November 25, 2013

math
For the integers from 1 to 1000, how many multiples of 9 are also multiples of 6?
November 25, 2013

communicate
consider an artifact that is prominently displayed by a friend or co-worker - either at home or in some other space. In 1-2 paragraphs, explain how this artifact has influenced your interpretation of this person's identity. Is your perception more positive or negative ...
November 25, 2013

Calculus
An observer stands at a point P, one unit away from a track. Two runners start at the point S in the figure and run along the track. One runner runs 2 times as fast as the other. Find the maximum value of the observer's angle of sight è between the runners. Thank ...
November 23, 2013

Solar Energy
Formula in first question: a)Pmpp < Voc X Isc Formula in second question: Load resistance = Vmpp/Impp
November 23, 2013

Solar Energy
With respect to a PV module's I-V and P-V curves, and the module's operating point, consider the following statements: a) When the operating point of the PV module is on the MPP (maximum power point), \(P_{mpp} \lt V_{oc} \times I_{sc} \) b) For a given Irradiance and ...
November 23, 2013

Math
Thanks Ms. Sue!
November 19, 2013

Math
What is the smallest positive composite integer?
November 19, 2013

Comm 215
Do these look correct? Part I: True or False 1. The following word group is a FRAGMENT: That movie, one of my favorites. _X_True __False 2. The following word group is a FRAGMENT: The local baseball team, needing a good pitcher most of all. _X_True __False 3. The following ...
November 19, 2013

math
how can you use the product of 12 x 6 to find the product of 12 x 12 ?
November 18, 2013

chemistry
A mixture of NaCN and NaHSO4 consists of a total of 0.60 mol. when the mixture is dissolved in 1.0 L of water and comes to equilibrium the pH is found to be 9.9. Find the amount of NaCN in the mixture.
November 18, 2013

math
Find recursive and explicit formula for -40 -36 -32 -28
November 18, 2013

Liquid capacity of pitcher
1 quart
November 17, 2013

Science
A pelican flying along a horizontal path drops a fish from a height of 125 m while traveling 40 m/s. How far does the fish travel horizontally before it hits the water below?
November 17, 2013

Statistics
this makes no sense, u said which would be inferential and which would be inferential
November 16, 2013

science
Chemistry Hey guys, i have a question about how to figure out how much mass of a compound i need to find 130ppm here is the question. What mass of Fe(NH4)2(SO4)2*6H2O is required to prepare 2.25 L of a 130 ppm iron solution? Now i know that ppm is (mg of desired compound)/(kg ...
November 16, 2013

Chemistry ppm
Oh okay, I understand. Wow thanks alot.
November 16, 2013

Chemistry ppm
Hey guys, i have a question about how to figure out how much mass of a compound i need to find 130ppm here is the question. What mass of Fe(NH4)2(SO4)2*6H2O is required to prepare 2.25 L of a 130 ppm iron solution? Now i know that ppm is (mg of desired compoun)/(kg of solvent ...
November 16, 2013

chemistry
OH is correct haha sorry i read that wrong um well C is incorrect same as D, B is incorrect because if the constituent is the first number than you wouldnt use the number 1 plus its a methyl as the first carbon making it decane and then A is the only correct one for reasons ...
November 16, 2013

chemistry
4,5-dimethylpentane is incorrect, not only is it not using the lowest constituents numbers in the name I.E. using 1,2 instead of 4,5 it is impossible to have a methyl constituent on the first or last carbon because that would just mean the compound is not a pentane but in fact...
November 16, 2013

Math
Well W = 3 L = (2W)-5 = (6) - 5 = 1 so W + W + L + L = perimeter so 2W + 2L = perimeter so subbing 2W-5 in for L we get 2W + 2(2W-5) = perimeter = 2W + 4W-10 = perimeter = 6W - 10 = perimeter = 6(3) - 10 = perimeter =18 - 10 = perimeter = 8 = perimeter or solving the other way...
November 16, 2013

Chemistry
i dnt see any relevant equations, i dont know how u expect someone to help you also is strain a spring constant? too much information is lacking
November 16, 2013

physics
A 160 kg child jumps at 7 m/s into a boat floating a rest. After the jump, they both move at 3 m/s forward. Find the boat's mass.
November 14, 2013

phyics
A glass bottle of soda is sealed with a screw cap. The absolute pressure of the carbon dioxide inside the bottle is 1.60 x 105 Pa. Assuming that the top and bottom surfaces of the cap each have an area of 3.60 x 10-4 m2, obtain the magnitude of the force that the screw thread ...
November 12, 2013

English
also mood coward
November 9, 2013

English
is sarcasm one
November 9, 2013

English
which poetic device does this quote use “Why no one on our side had even thought of firing a gun, because when you came right down to it, we didn’t like guns and did not believe in them”
November 9, 2013

First year chem
It was on a test and computer wasn't allowed.
November 9, 2013

First year chem
Barium has 6 stable isotops (132Ba, 134Ba, 135Ba, 136Ba, 137Ba, and 138Ba) with natural abundances ranging from 0.1% for least abundant to 71.7% for the most abundant. Which isotope of barium is the most abundant? (Answer is 138Ba) Thank you for your help!!
November 9, 2013

PRE-CALC HELP
1) Two boats leave the same port at the same time. One travels at a speed of 27 mi/h in the direction N 50° E and the other travels at a speed of 22 mi/h in a direction S 70° E (see the figure). How far apart are the two boats after one hour? (Round your answer to the ...
November 8, 2013

PRE-CALC HELP
Two boats leave the same port at the same time. One travels at a speed of 31 mi/h in the direction N 50° E and the other travels at a speed of 20 mi/h in a direction S 70° E (see the figure). How far apart are the two boats after one hour? (Round your answer to the ...
November 8, 2013

PRE-CALC HELP
A communications tower is located at the top of a steep hill, as shown. The angle of inclination of the hill is 58°. A guy wire is to be attached to the top of the tower and to the ground, 150 m downhill from the base of the tower. The angle α in the figure is ...
November 8, 2013

physics
Water is flowing down through the pipe shown in the drawing. Point A is 0.410 m higher than B. The speed of the water at A and B are vA = 5.00 m/s and vB = 3.80 m/s. Determine the difference PB - PA in pressures between B and A. The density of water is 1.00x10^3 kg/m3.
November 7, 2013

geography
What are some reasons why society, especially in the U.S., has been more and more accepting of the view of global warming? Please post to these questions by the end of Week 3.
November 6, 2013

chemistry
Assuming reaction goes to completion, determine the final concentration of NH4Cl in the calorimeter. heat capacity =3.03J/g.c density =1.012 5g of NH4Cl used 100 mL of water used NH4Cl(s) + H2O(l) --> NH4Cl(aq)
November 6, 2013

math
HOw can i explain this to a 4th grade student as it seems her teacher did not do the number substitution like W and dividing to get the answer.
November 5, 2013

math
the girls high school basketball team played 12 games. they won 6 more games than they lost. find the number of games the basketball team won.
November 5, 2013

ashford
Mrs. Orlof teaches two history classes, one in the morning and one in the afternoon. Yesterday she gave the same test to both classes. Anyone who failed the test must take a retest. Since a greater percentage of students who took the morning test failed the test than students ...
November 4, 2013

Algebra
-2 |h-7|= -28
November 3, 2013

chemistry
Compared to the particles of a gas, the particles of a liquid are not in constant motion collide with the sides of the container, but not with each other do not completely fill their container can move longer distances have more space in between the molecules
November 2, 2013

Physics
MASS PUSHED BY A SPRING A block of mass m=2 kg on a horizontal surface is connected to a spring connected to a wall (see figure). The spring has a spring constant k= 16 N/m. The static friction coefficient between the block and the surface is μs= 0.7 , and the kinetic ...
November 2, 2013

math
A small wheel of radius r is situated at the top of a ramp having an angle θ = π/3 rad At t = 0 the wheel is at rest and then it starts to rotate clockwise in the positive x direction with constant angular velocity ω. Find the parametric ...
October 31, 2013

informal logic
Which of the following may not qualify as a falsifiable claim? (Points : 1) Your luck will improve. Your house will be sold tomorrow. Granite is more dense than sand. Smoking may cause heart disease.
October 30, 2013

Algebra
a car repair shop charge $80 per hour for labor and $210 for the parts of a car . if the total cost of repair for the car was $490 , how many hours did it take ro repair the car ?
October 28, 2013

Probability
7. The random variable X is distributed normally with a mean of 12.46 and variance of 13.11. You collect a random sample of size 37. a. What is the probability that your sample mean is between 12 and 13? b. What is the probability that a single observation is between 12 and 13...
October 27, 2013

chemistry
Based on the calculations above, which of the following equations is the one represented by this experiment? Justify your answer by comparing the moles of iron consumed and the moles of copper produced to the coefficients in the equation of your choice. (16 points) Fe + CuCl2...
October 26, 2013

Social studies
"There capitols"? Really? You're a teacher? How about "their capitols"? And your map left off the capitol of Mississippi altogether.
October 24, 2013

physics
A person jumps from the roof of a house 4.0-m high. When he strikes the ground below, he bends his knees so that his torso decelerates over an approximate distance of 0.66m. If the mass of his torso (excluding legs) is 42kg , what is the magnitude of the average force exerted ...
October 24, 2013

Physics
A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 22◦ below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a constant acceleration ...
October 23, 2013

physics
A place kicker must kick a football from a point 34.0 m (about 37 yd) from the goal. As a result of the kick, the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 21.0 m/s at an angle of 56◦ to the horizontal. To...
October 23, 2013

Math- URGENT
find the value of x or y so that the line through the points has the given slope. (12,y) and (15,-8); slope: 2/3
October 23, 2013

Chemistry
Is a more negative corrosion potential more susceptible to corrosion or a less negative corrosion potential?
October 23, 2013

science
What keeps the very dense gas at the core of the Sun from becoming a solid?
October 23, 2013

English ---- check grammar---
I know that looks like a long paragraph . I wrote it like a essay , but when i post it , it changed all my style and space !!! I dont know why !
October 23, 2013

English ---- check grammar---
Can you guys check grammar for me ? Thank you!
October 23, 2013

English ---- check grammar---
When I was fifteen years old, I left the Vietnam to begin a new life with my family in the United States. But my young heart has never stopped yearning for that one day when I would go back home. One peculiar thing about Vietnamese is that they associate homesickness with ...
October 23, 2013

5TH GRADE MATH
50*2 = 100 100/3 = 33 1/3
October 22, 2013

5TH GRADE MATH
Um...Stephon could you stop typing in caps?
October 22, 2013

5TH GRADE MATH
basically we need to find the greatest whole number to be given out to each student. so, 3 to each student means 3 + 3 +3 or 3* 3 = 9. There are 10 pencils, so 10-9 = 1 remaining pencil.
October 22, 2013

milli
What's the question, my good man?
October 22, 2013

Trigonometry
Yes sir, this is supposed to be a precalculus problem. Thanks
October 22, 2013

Trigonometry
Find all x such that 0< = x <= pi/2 and sin^7 x + cos^7 x = 1. (Be sure to show that no other values of x satisfy the equation. Remember, x is in radians.) I'm confused. I posted this before but my thick skull couldn't absorb the answer I was given. Could someone...
October 22, 2013

Please help mrs Sue
I'm pretty sure it's A.
October 22, 2013

Biology
Which of the following cells check for during the G2 check point? a. Growth hormone c. DNA integrity b. Nutritional status d. Cell size In mitosis, if a cell has 4 chromosomes in prophase, how many chromosomes will this cell have in metaphase? a. 64 b. 32 c. 16 d. 8 e. 4 The X...
October 20, 2013

Trigonometry - Slopes stuff
Point A is the terminal point of angle phi and point B is the terminal point of angle theta. Point A is in the first quadrant and point B is in the second quadrant, while tan phi = 1 and tan theta = -7. Find the slope of AB. Ok so since A is in the first quadrant and tan phi...
October 18, 2013

Math
You are making a recipe that consists of 5 different ingredients. In how many different orders can you add the ingredients to the bowl?
October 18, 2013

quantum physics
Well, technically, they could cheat via email so it's not exactly a better way per se, however, yes that is cheating I suppose.
October 18, 2013

math
What would be your answer after all these problems?
October 17, 2013

Statistics
In probability and statistics, mean is used to refer to one measure of the central tendency either of a probability distribution or of the random variable characterized by that distribution. In statistics and probability theory, the standard deviation (represented by the Greek...
October 17, 2013

math
Yerp
October 17, 2013

math
Whoops, I meant 100/100 - 21/100 = 79/100 100/100 + 6/100 = 106/100 79/100 * 106/100 * 44 = ?
October 17, 2013

math
Do what you did on the previous problems :P 100/100 - 21/100 = 79/100 100/100 - 6/100 = 94/100 79/100 * 94/100 * 44 = ?
October 17, 2013

Math
Actually, that would be 1.23 x 10^-10. Move it over one more place. Count 11 places from 1.23. From 1.23 to 0.123 there is one jump.
October 17, 2013

Math
This means: how many times larger is a proton then an electron? Thus we put the proton on the numerator and the electron on the denominator. From pure chemical science, a proton is wayyy bigger (and heavier) than an electron. Thus, if you get an answer that is really small ...
October 17, 2013

math
Oh right, I'm sorry.
October 17, 2013

math
We need a 17% discount. We need a 5% discount as well. These discounts are on something valued at $89. If you have a 17% discount, it means you get 100/100 - 17/100 = 83/100 off the original price. In the same way, if you have a 5% discount, it means you have a 100/100 - 5/100...
October 17, 2013

Physics
What do you say?
October 17, 2013

Science
Similar results should be obtained when the experiment is repeated. Don't spam your posts repeatedly if possible, ok?
October 17, 2013

Science
Similar results should be obtained when the experiment is repeated.
October 17, 2013

Health
What she means is that how did your family affect your behavior? How did the internet affect your behavior? Or so I interpret. Etc. etc.
October 17, 2013

math
Ok, 5% = 5/100. Thus, 5% tax is equal to 0.05. The tax is equal to 0.05 * (the before tax cost = 40). Then, you add the price of the ticket back. You can take a shortcut by doing 100% + 5% = 105% * 40 = 1.05 * 40 = ?
October 17, 2013

math
Ms. Sue is totally correct. If you want to go a little bit simpler then: 25% off something is equal to 75/100 * (the price of the "something") because 25% = 25/100. But 25% means that you take that much off, so you need to minus 25/100 from the original percentage, ...
October 17, 2013

Science
Honestly, a google search will probably help you... but.... Chemical Composition Core is made of iron with minor amounts of nickel, and lies at the center of the earth Mantle is made of iron-magnesium silicates and surrounds the core. The mantle makes up the bulk of the earth...
October 17, 2013

MATH
Ummmmmmmm how am I supposed to know why don't you ask him ;) ? Just kidding, there is usually like 12 people on a bsaketball team and like 6 on a tennis team so probably he's not correct.
October 17, 2013

Can someone check these answer for me?
np :P
October 17, 2013

Can someone check these answer for me?
Question 5 is confusing...
October 17, 2013

Can someone check these answer for me?
Gymnosperms are a taxonomic class that includes plants whose seeds are not enclosed in an ovule (like a pine cone). Gymnosperm means as "naked seed". This group is often referred to as softwoods. Gymnosperms usually have needles that stay green throughout the year. ...
October 17, 2013

Can someone check these answer for me?
1,2,3 are wrong 4 is correct
October 17, 2013

Can someone check these answer for me?
Erm.... could you tell me what you think I am not going to just give you the answer to you.
October 17, 2013

Can someone check these answer for me?
Of course you know you could just do some research on the web and double check your answer by asking it here...
October 17, 2013

Can someone check these answer for me?
Number 1, a stamen is the male part producing pollen which animals pick up to deliver to the female part. Number 2, the pistil is the female part which produces seeds, so it needs to get the pollen from the male part Number 3, The 3 other answers don't make sense For ...
October 17, 2013

Can someone check these answer for me?
Or that's what I researched, Ms. Sue is probably right though.
October 17, 2013

Can someone check these answer for me?
1A 2D 3B 4C 5B
October 17, 2013

Can someone check these answer for me?
Um...which are the answers you chose?
October 17, 2013

science plz help right now!!!!
20 points o.O lol
October 17, 2013

Math
add em all up and divide by 29 29(1+29) / 2 = 435 435 / 29 =???
October 17, 2013

math
1/2 * 1/2 * 1/2 = 1/8
October 17, 2013

Science
Proteins are created by making a long chain of amino acids when ribosomes translate mRNA. In this process, tRNA brings in the single amino acids to the ribosome.
October 17, 2013

Math
20/x = 4/5 4x = 100 x = 25 Dunno why the info about monday is in there
October 17, 2013

Kinesiology
What are the ABCs that kinesiologists in sport and exercise psychology study?
October 17, 2013

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