Friday
May 6, 2016

Posts by jj

Total # Posts: 999

algebra
september
September 21, 2012

math 5th
number puzzles You say this number when you start at 0 and count by 15. You say this number when you start at 0 and count by 25. This number is less than 200. This number is even.
September 19, 2012

Physics
no one answered your question for years...
September 11, 2012

chemistry. am i doing this right?
how do i find the rate then?
September 10, 2012

chemistry. am i doing this right?
1.) One of the trials in this week's experiment in chemical kinetics was determined to be 10.60 seconds. Evaluate log10(rate). log10(rate) = Would I just plug 10.60 in for the rate?
September 10, 2012

physics
it's supposed to be time, not distance as answer
September 6, 2012

physics
how do i make a velocity vs. time graph? i have a graph of acceleration vs. time and i am told to find distance between a certain amount of time and i was told to make a graph. is there any other way to find distance or is the velocity vs. time graph necessary?
September 6, 2012

physics
For the one dimensional motion of an object along an axis, choose all the statements that are True. 1.) If the object reverses direction and goes the opposite way, the sign of the velocity changes. 2.) If the acceleration has the opposite sign than the velocity (and is not ...
September 6, 2012

chemistry
Calculate the heat outflow when 2 kg of dry saturated steam at 8.0 bar is converted into ice at -lO0C.
September 1, 2012

Physics
Where is the 0.707 coming from? And I plugged k= 8.99 x 10^9, q= 2.65 x 10^-6, and s= 0.408 into the net force toward the center equation to get 0.347N. So this is the magnitude that all of the charges would have, correct?
July 18, 2012

Physics
There are four charges, each with a magnitude of 2.65 microcoulombs. Two are positive and two are negative. The charges are fixed to the corners of a 0.408-m square, one to a corner, in such a way that the net force on any charge is directed toward the center of the square. ...
July 18, 2012

Quemistry
L has twice the volume of container J. Container J is at a temperature of 100 K, and container L is at 200 K. How does the pressure in container J compare with that in container L
June 24, 2012

Business
B is correct answer
May 24, 2012

econ
Suppose the country of Maverick has specialized in the production of a good but has not yet entered into trade. At this point in time, Maverick has A. Moved to a level of production outside its production possibilities curve. B. Shifted its production possibilities curve ...
May 8, 2012

Chemistry
Calculate the concentration of H+(aq) and the concentration of OH-(aq) for the following solution with the following pH at 298K showing all your working. pH = 3.20
April 29, 2012

Math
this is not a linear equations Jeffrey's Bank Account Week Balance 1 $10 2 $24 3 $38 4 $52 5 $66 6 $80 using the infomation from the table, write an equation that represents the balance in jeffrey's bank account as a function of the number of weeks i forgot how to find...
April 26, 2012

math
Find the derivative of the function y = sqrt of s^11 + 1 the entire thing is under the square root and and 1 is not in the exponent. Is the answer 1/2 (s^11 +1)^-1/2(11s^10)?
April 17, 2012

Chemistry
An structural isomer of bromobutane (C4H9Br) can be hydrolysed using aqueous sodium hydroxide to produce butanol. This can be represented by the following equation: C4H9Br(l) + OH-(aq)  C4H9OH(l) + Br-(aq) This reaction was investigated experimentally and the following...
April 5, 2012

math
1lb candy 502 pieces cost 16.8 cents ounce,how do you find out the cost of 1 piece of candy?
April 2, 2012

Math
Find the derivative: y = square root of x(x+14). The square root is only on the x. Please show work and explain. I don't know how to do this. Thanks!
March 29, 2012

Geography- Market Areas
h t t p : / / w w w . w i l e y .c o m/ college/kuby/0471701211/compchact/ch09/index.htm?newwindow=true get rid of spaces
March 26, 2012

Geography- Market Areas
The GIS assumes that you will root for the team nearest you. Thus, it draws market areas based solely on the distance to the nearest baseball team. In real life, however, other factors can affect or distort the market area so that the distance is not equally divided between ...
March 26, 2012

Calculus. please helppp!!
1) Two cars travel in the same direction along a straight road. The figure below shows the velocity, V, of each car at time t. Car B starts 3 hours after car A and car B reaches a maximum velocity of 40 km/hr. a. For approximately how long does each car travel? Car A: ...
March 13, 2012

Math
625
March 13, 2012

Chemistry. Please help!!
Calculate the final temperature when a 18.7 gram sample of ice at 0 degrees C is placed into a styrofoam cup containing 113 grams of water at 71.6 degrees C. Assume that there is no loss or gain of heat from the surroundings. Heat of fusion of ice = 333 Jg^-1 Specific heat of ...
March 2, 2012

Chemistry. Please help!
it's ok. i figured out the last ones. thanks so much!!
February 28, 2012

Chemistry. Please help!
For the problems below, I have the answers written but from questions d-i, I don't understand how they got the answer. I tried doing it and somehow I messed up with the formula with 3/2 and 5/2 so please show work on how they got the answers for d-i. In answering this set ...
February 28, 2012

math
THANK YOU VERY MUCH I REALLY APPRECIATE THE HELP MS.SUE
February 27, 2012

math
If there are 32 students and 5/8 walk to school . How many walk to school. HOw is this problem worked out
February 27, 2012

calculus. please helppp!!
that worked. thank u so much!!
February 22, 2012

calculus. please helppp!!
is there a way to use difference quotients for it?
February 22, 2012

calculus. please helppp!!
urghh it says thats not right!
February 22, 2012

calculus. please helppp!!
the values changed. now its table is: (0, 14) (2, 38) (4, 60), (6, 77) (8, 93) (10, 104) so i said the first derivative is positive, second is negative. f^' (2) ---> between x=0 and x=2, it's 12 between x = 2 and x = 4, it's 11 average = 11.5 f^' (8) ---->...
February 22, 2012

calculus. please helppp!!
its says the answers are wrong. doesn't specify which one. so I'm not sure if the actual answer is wrong or if its the negative sign.
February 22, 2012

calculus. please helppp!!
i tried the for x = 2, -12.25 and for x =8, -8.5 and the website says it's wrong. it doesn't say which one is wrong. should the values be negative or positive?
February 22, 2012

calculus. please helppp!!
for x = 8 do u use between x =6 and x=8 and between x=8 and x=10?
February 22, 2012

calculus. please helppp!!
so then for x = 8, u do the exact same steps by dividing the numbers by 2?
February 22, 2012

calculus. please helppp!!
yeah for 2 but when I tried that for x = 8, I have a huge gap between the two numbers for 8. I got between x=0 and x =8, it is -88. then dividing that by 8, i got -11. then when i did between x= 8 and x =10, i got -55. then dividing that by 8, i got -1.875 and now I'm stuck
February 22, 2012

calculus. please helppp!!
1.) values of f(t) are given in the following table: t 0 2 4 6 8 10 f(t) 137 112 88 68 49 34 Estimate (f prime) f^' (2) and f^' (8) Please show work so I can understand. I'm really stuck. if the table comes out messed up, the values are: (0, 137) (2, 112) (4, 88) (...
February 22, 2012

calculus
I'm getting confused on x= 8 would you do between x=0 and x= 8, the change is -88 and then divide that by 8 = -11 between x= 8 and x= 10, y changes -15 and then divide that by 8 to get -1.875 but then what?
February 22, 2012

calculus
oh ok. but wut about f^'(2). how do i find that from the table?
February 22, 2012

calculus
i just saw the table is messed up so the values are: (0, 137) (2, 112) (4, 88) (6, 68) (8, 49) (10, 34)
February 22, 2012

calculus
1.) values of f(t) are given in the following table: t 0 2 4 6 8 10 f(t) 137 112 88 68 49 34 a. Does this function appear to have a positive or negative first derivative? Second derivative? * I think both derivatives are negative b. Estimate (f prime) f^' (2) and f^' (...
February 22, 2012

Science
How many grams of oxygen are collected in a reaction where 230. mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr?
February 16, 2012

language
Thank u sooo much :-).
February 7, 2012

language
1. (Glue, plural) 2. (place, plural)
February 7, 2012

language
Underline the present-tense verb. Tell whether it is singular or plural. 1. A craftsperson uses small shells or pieces of large shells. (uses ,singular) 2. most people glue the shells into the frame. (frame, plural) 3. Then they place it on a flat surface. (surface, plural). 4...
February 7, 2012

language
Please let me know if I'm right Shaped, past.
February 7, 2012

language
2. Shaped, past.
February 7, 2012

language
Rolls, present
February 7, 2012

language
Rolls, past
February 7, 2012

language
(Rolls, past)
February 7, 2012

language
Write the verb in each sentence. Write whether the action is past, present, or future 1. A Potter adds sand to the clay (adds, present) 2. Then he rolls the clay into long, pipe-shaped pieces. (Pipe-shape, past) 3.Another potters will use a potter's wheel . (will use, ...
February 7, 2012

Information Systems
Hi ..Can somebody suggest me some good ideas or topics for senior projects related to Information Systems. Thank You !
February 1, 2012

social studies
I don't know
January 17, 2012

Algebra
(1/2)*(30)*(38)= 570
November 25, 2011

chemistry
how can you tell if a combination in a mixture forms a precipatate or not?How can you tell from the sollubility table?
November 20, 2011

english
Leadership Traits of Effective Managers. I NEED SOME GOOD ARTICLES FOR THIS TOPIC.
November 14, 2011

Economics
The index most widely used by the government and the private sector to measure changes in the cost of living is the (a) the GDP deflator, (b) Producer Price Index, (c) The interest rate, (d) Consumer Price Index
November 9, 2011

chemistry
what is the binding energy of an electron in a photosensitive metal (in kj/mol) if the minimum frequency of light that can eject electrons from the metal is 6.3 x 20^14 Hz?
November 7, 2011

chemistry
thank you
November 7, 2011

chemistry
radium-266 may emit a photon of light with a frequency of 4.5x 10^19 s^-1 when it undergoes nuclear fission. what is the wavelength in pm of this photon?
November 7, 2011

Physics
A boy kicks a football with an initial velocity of 20 m/s at an angle of 30 above the horizontal. What is the vertical component of it's velocity at the highest point of it's trajectory?
November 6, 2011

Physics
A hockey puck slides off the edge of a table with the initial velocity of 20m/s. The table height is 2.0 m. What is the accleration of the puck right after it leaves the table?
November 6, 2011

social studies
what is common for pilgrims and our life?
October 27, 2011

physics
deez nuts
October 26, 2011

physics
Hayes fires a projectile from his air gun. The gun provides a constant 300 N of force on a 0.1 kg projectile as it travels through the 0.3 meter barrel. How fast is it going when it leaves? It starts from rest and there is no friction.
October 24, 2011

Algebra
invested $1,110.00, how much was his rate of interest?
October 21, 2011

problem solving
The greatest common factor of two nubers is one. What do you know about the numbers.
October 19, 2011

math
it is 9 am yor family vacation stars in new york city with a final estination in miami. you travel 58 miles every hour if you do not stop for meals or attractions.you first head to washington d.c.and you must stop for 1 hour lunch at noon. use rounding to estimate how many ...
October 18, 2011

cal
If a ball is thrown into the air with a velocity of 41 ft/s, its height (in feet) after t seconds is given by y = 41t − 16t^2. Find the velocity when t = 1.
October 18, 2011

math
a boy is blowing a spherical balloon at a rate of 50 cm3/s.at what rate is the radius of the balloon changing when the radius is 10 cm?give your answer to 2 decimal places.
October 11, 2011

math
a boy is blowing a spherical balloon at a rate of 50 cm3/s.at what rate is the radius of the balloon changing when the radius is 10 cm?give your answer to 2 decimal places.
October 11, 2011

chemistry
calculate how many mL of 6M HCL are needed to prepare 100mL HCL solution with a concentration of ~1M?
October 10, 2011

chemistry
Which is a balanced equation for the following reaction? tin + oxygen → tin (IV) oxide
October 5, 2011

Chemistry
What is the final temperature after a 21.8 g piece of ice is placed into a styrofoam cup containing 114 g of hot water at 68.2 degrees C. Please explain because I don't even understand how to start.
October 5, 2011

physics
You are trying to find out how high you have to pitch a water balloon in order for it to burst when it hits the ground. You discover that the balloon bursts when you have pitched it to a height of 14 m. With what velocity did the balloon hit the ground? The acceleration ...
October 2, 2011

physics
Judy, by chance, spots a potted plant falling outside the window at 2.04 m/s . Further down the same building, Judy’s boyfriend clocks the pot at 56 m/s . How far apart are the friends? The acceleration of gravity is 9.8 m/s 2 .
October 2, 2011

Math
At a party, if 1/3 of one sheet cake and 1/6 of another sheet cake remain uneaten, what fraction of a whole sheet remains uneaten .
September 29, 2011

physics
A 1200 kg car on a horizontal surface starts from rest and accelerates uniformly to 72 km/h in 20.0 s. Friction exets an average force of 450 N on the car during this time. a) what is the net work done on the car b) how far does the car move during this acceleration now i ...
September 28, 2011

Math
For 3 person relay, a coach can choose from 4 of his top runners. How many different 3- person teams can he choose?
September 28, 2011

chem
a piece of (density= 10.5 g/ml)dropped into water displaces 21.56 ml of water. what is the mass (in grams) of this piece of silver?
September 27, 2011

computers
I need some good links for technology newsletter related to information technology.
September 27, 2011

Physics
Vector A has a magnitude of 7 and is at an angle of 22.5 degrees measured counter-clockwise from the x axis. Vector B has a magnitude of 12 and is at an angle of 110.4 degrees measured counter-clockwise from the x axis. Vector C has a magnitude of 6 and is at an angle of 180 ...
September 23, 2011

math
-3 + x/1 = 3 Since any number divided by 1 =itself, we can simplify the x/1; -3 + x = 3 Since we want to get "x" by itself, so we can solve for "x," let's add a +3 to the -3 on the left. Remember, whatever we do to the left, we have to do to the right. ...
September 22, 2011

math
thous - hundreds - tens - ones 5 3 9 8 5 3 7 9 Thousands and hundreds are the same, so you can eliminate 1/2 of the numbers. Now, take a look at the ones and tens columns. . . What are the largest numbers? (9's) Which 9 holds the largest place value? i.e. 9 of 10s? OR 9 of...
September 22, 2011

More Critical Thinking
What do you think? Here is an example of a passage that contains an ought imperative by searching and asking Google: "What is an ought imperative): Never fuel your vehicle while the motor is running. If for some reason the vehicle starts moving, it could cause a serious ...
September 20, 2011

algebra
Find your least common denominator and convert all the fractions before you start to solve the equation. (LCD = 24 x/8 = 3x/24 1/6 = 4/24 6 = 144/24 Now the equation looks like this: x/8 - 4/24 = 144/24 Let's work to get x on one side, so add 4/24 to each side: 3x/24 = 144...
September 20, 2011

Math
I don't know if there is a formula or way to set up an equation, so I would just start a grid. Note: If your calculator doesn't have a % function or if doing by hand, remember percent means per 100; therefore, for example, 5% = .05 year 1 = 42,000 yr 2 5% = 42,000 x 5...
September 20, 2011

algebra
You may want to review the answer given to -100/-5 =
September 20, 2011

social studies 7th
Jefferson Davis Elected President of the Confederate States of America November 6, 1861 Who was president during the Civil War? If you were from a Northern state, you answered Abraham Lincoln. If you were from a Southern state, you may have answered Jefferson Davis. I would ...
September 17, 2011

social studies 7th
I think it started in 1861; therefore, 1861-1865. That's what I am finding with several different sites on a web search as well. You may want to confirm--JJ
September 17, 2011

physics
2.0
September 17, 2011

Physics
You lean over the edge of a building that is 106 meters above the ground and throw an object straight upwards. This object takes 3 seconds to reach its maximum vertical displacement above your hand and then falls to the ground. From the moment it leaves your hand, how long ...
September 16, 2011

Math
You've done the math to learn how many $20 bills Aunt May has that equals the $10,000. Based on how many $20 bills, spending 1 a day, you have answered the "how many days"! You've got it and done all the work; just think how the number of $20 bills relates to...
September 15, 2011

math
12 gray out of 64. Find the percent: 12 divided by 64 = ?? (you'll get a decimal, no need to move decimal to make a percent--just keep the decimal for the next step. Next step: 400 x the decimal found above = ?? and this answer will tell you how many gray sweatshirts to ...
September 15, 2011

Math
18 dimes = 1.80 7 qtrs = 1.75 Total = the $3.55 Can you work it backwards, as I have no idea how to set an equation. It was instinct for me to see that initially I had to break the 55-cents down and then work with the $3.00. I'm sorry I can't help with setting the ...
September 13, 2011

geometry
Hi Kayla, First determine your definition of a "prime number. (It can only be divisible by itself or 1, evenly.) Replace "n" with a number and add 1 to it; then test the definition. e.g., if N = 1; then 1 + 1 = 2 (Is 2 a prime number?) try again, e.g.if N = 3; ...
September 8, 2011

Math
I am doing homework and supposed to write down prime numbers up to 50, this is what I wrote down. (1,3,5,7,11,13,17,22,23,2731,33,35,37,41,43,45,47) Is there any numbers missing?
September 7, 2011

Math
Are these prime number correct all the way up to 50 (1,3,5,7,11,13,17,22,23,25,27,31,33,35,37,41,43,45,47 ) What kind of tens are prime
September 7, 2011

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