Thursday
May 5, 2016

Posts by Zack

Total # Posts: 282

calculus
the integral of (1+4x^2) is (x+(4/3)x^3)
April 27, 2011

math
(6t-2)(t-4)
April 27, 2011

Physics
Thank you
April 27, 2011

Physics
A disk with a rotational inertia of 7 kgm^2 rotates like a merry-go-round while undergoing a torque given by (5+2t)Nm. At time 1s, its angular momentum is 5kg m^2/s. what is its angular momentum at 3s? I can't figure out how to start this problem.
April 27, 2011

algebra
37 and 1/2 % You just divide top by bottom and move the decimal two places to the right.
April 27, 2011

Chemistry
at a pressure of 405kpa the volume of gas is 6.00cm3
April 6, 2011

math
In a storm, a plane flew against the wind and took 9 hours to cover 3,600 miles. The return trip, traveling with the wind, took 1 hour less. find the air speed of the plane, and the speed of the wind.
April 4, 2011

physics
A demonstration gyroscope consists of a uniform disk with a 37-cm radius, mounted at the midpoint of a light 61-cm axle. The axle is supported at one end while in a horizontal position. How fast is the gyroscope precessing, in units of rad/s, if the disk is spinning around the...
March 26, 2011

Math
There are 6 different shapes in a bag, each student will draw one shape, trace it, then return it to the bag. How many outcomes are possible?
February 16, 2011

englsh
need help in comparing Mercutio in romeo and juliet with riff in westside story
December 8, 2010

math
write a four sentence paragraph about how you do a algorithm problem
December 6, 2010

Statistics
True or False, In simple linear regression analysis, if the error terms exhibit a positive or negative autocorrelation over time, then the assumption of constant variance is violated.
December 5, 2010

Physics
A box slides down a 38.5° ramp with an acceleration of 1.47 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.
December 2, 2010

Calculus 1
Find the most general antiderivative of the function. Use C for any needed constant. f(u) = (u^4 + 7 sqrt(u)) / u^2 F(u) =
November 8, 2010

english
Could someone please check for me? I have to list the adverb and then list the word the adverb modifies. 1. She is particularly interested in sports. 2. Have you ever climbed a mountain? 3. Which part of the assignment would you do next? 1.particularly-is interested 2.ever-...
November 2, 2010

11th grade physics
Rachel pulls her 177N suitcase at a constant speed by pulling on a handle that makes an angle (-) with the horizontal. Using frictional force on the suitcase as 27N and Rachels force on 43N on the handle to calculate the net force. 1. What angle does the handle make with the ...
November 2, 2010

College Critical Reading
when critical readers analyze a written selection for possible obstacles they need to expose irrelevant appeals attack the person discussed in the selection rely on improper exploitation of persuasive capabilities of language
October 26, 2010

8th grade math
simplify: 3 to fourth power minus square root of sixty-four divide (10-12 squared)
September 19, 2010

media
what is the significance of immediate news media delivery on culture?
September 10, 2010

algebra
what is -2=6/7p
August 26, 2010

English
Thanks, Writeacher! I really appreciate that!
July 9, 2010

English
Which of the following choices is not necessary information for a works cited list? A. the publisher's name B. The number of pages in the book C. date of publication Is B correct? Juct checking, Thanks!
July 9, 2010

English
Which of the following is the bst example of a citation reference for a work by one author? a. Marks 1999 B. (Marks, Bill.1999) c. (Marks-1999) d. Marks et.al. 1999 e. none of the above I know that C and D are wrong I think A is wrong as it has no punctuation. for B, I think ...
July 9, 2010

English
When doing a research, a current source is a useful one. T or F? I think it's T as a current one would give more accurate information. Thanks.
July 8, 2010

English
So is the answer C? Thanks
July 8, 2010

English
Why not? Doesn't meditate mean think or plan? If yes, I think B is correct as we have to think about what the thesis statement is and what we are going to write in the essay.
July 8, 2010

English
One possible method to begin an essay is A. to paraphrase B. to meditate C. to ask a question B, right? Thanks.
July 8, 2010

Grammar
Wait a second. But is "Take public transportation" an independent clause? i don't think it is.
July 8, 2010

Grammar
Oh, sorry about that.
July 8, 2010

Grammar
Oh, I see. Thanks!
July 8, 2010

English
I sat proudly on Joe, my pinto, as we marched around the ring in the pony competition at the fairgrounds. I had worked nights for two years to get the money to buy him, worked hard to train him, and here we were. Th conclusion above is an example of: A. editing with a ...
July 8, 2010

English
Which of the following choices is a strategy that can help speed up reading? A. external distractions B. Using a penor pencial as a pacer C. Use subvocalization I think both B and C are correct. But I could only choose one answer. What do you guys think the answer should be? ...
July 8, 2010

HIstory
How did the Industrial Revolution impacted American Society economically, socially, politically, and morally.
May 4, 2010

Calculus- math
thank you!!!
May 3, 2010

Calculus- math
integral of (2x) / [(x+2)(x+1)]
May 3, 2010

math
the area of a trapezoid is 45 square centimeters. the bases of the trapezoid are 10 centimeters and 8 centimeters what is the height of the trapezoid?
April 22, 2010

Science
Yes
April 20, 2010

chemistry
All the following species are best described by writing at least two Lewis structures EXCEPT a. O3. b. SO2. c. NO2- d. SO3-2 e. SO3.
April 14, 2010

Chemistry
All the following species are best described by writing at least two Lewis structures EXCEPT a. O3. b. SO2. c. d. e. SO3. Explanation thanks
April 13, 2010

algebra 1
(1,3) and (-2,-4) is m= 1/2
April 11, 2010

Algebra 1
3+6x<9 -3 -3 6x<6 x<1 This is right or wrong
April 11, 2010

Algebra 1
-5 [54-(99-18)] -5[54 +99 +19] -5 [ 153+19] -5[172] -860 f(x)=2x²-5x How can I simplify -860 to fraction? I know something like - 860/100
April 11, 2010

Algebra 1
x+9y=8 (1) x=3-9y (2) x (3-9y)+9=8 3x -9y +9y=8 3x = 8 x= 2.6 Is this correct?
April 11, 2010

Physics
A projectile is shot straight up from the earth's surface at a speed of 1.20×104 km/hr. How high does it go?
April 6, 2010

math
what would be a good window for the graph of f(x) = -x^5 + 5x^3 - 3x + 15 I think that -10< x<10: -10<y<25 would be good. Does this seem right?
March 19, 2010

5th grade
the sum of eighty-nine and a number
March 2, 2010

space/astronomy
that doesnt apply at 10AU.
November 30, 2009

space/astronomy
Rank the objects based on the strength of the gravitational force that would be felt by a spacecraft traveling at a distance of 10 AU from the center of each of the objects, from weakest to strongest. 1)red giant mass: 1Msun radius: 100Rsun 2)sun 3)white dwarf mass: 1msun ...
November 30, 2009

Chemistry
nvm, i did some reworking heres what my final answer endo-by exo-none exo-by exo-on exo-on can someone confirm please?
November 22, 2009

Chemistry
Okay, so basically i think i got all the endo and exo figured out because of either state change (heat released or used) but how do i figure out the "on", "by" or 'none' part? 1) exo 2)exo 3)endo 4)exo 5)exo
November 22, 2009

pre-algebra
19
November 19, 2009

physical science
What is the change in thermal energy of water in a pond with a mass of 1,000kg and a specific heat of 4,184j(kgdegreesc) if the water cools by 1 degree c
October 27, 2009

physical science
Please help.How can the IMA of a screwdriver be increased?
October 20, 2009

science
What does in science the 'cross' mean in the warning sounds?
September 19, 2009

Physics Problem
A runner hopes to complete the 10,000m run in less than 30 minutes. After exactly 27 minutes, there are still 1100m to go. The runner must then accelerate at 0.20 m/s^2 for how many seconds in order to achieve the desired time? I get 80.9 but I know that the answer is 3.1 ...
August 30, 2009

Math 117
1.) A rectangular solid and a circular cylinder have the same volume and the same height. The base of the rectangular solid is a square. Which (if any) of the following statements are true? (i) The rectangular solid and the cylinder have the same base area. (ii) The ...
August 20, 2009

Algebra
Could someone work this out for me? Someone says the answer is 2.34 x 10^-6 but I think it's 2.34 x 10^-4. 2 x 10^-3 = 3 x 10^8 x 1/6 x pi x d Solving for d. Sorry it's kinda messy.
August 12, 2009

Physics
How would one determine the percent uncertainty in theta and in sin of theta for the following: 1) theta = 15.0 degrees +/- 0.5 degrees 2) theta = 75.0 degrees +/- 0.5 degrees I'm not sure whether I divide or use some kind of formula.
August 11, 2009

Physics
So, would that make it 8.76*10^-2? If so, what would the units be?
August 10, 2009

Physics
An average family of four uses roughly 1200 liters (300 gallons) of water per day. (One liter = 1000 cm^3.) How much depth would a lake lose per year if it uniformly covered an area of 50 square kilometers and supplied a local town with a population of 40,000 people? Consider ...
August 10, 2009

Physics
GPS can be used to determine positions with great accuracy. The system works by determining the distance between the observer and each of the several satellites orbiting Earth. If one of the satellites is at a distance of 20,000 km from you, what percent accuracy in the ...
August 10, 2009

Spanish
A donde vas a comer cuando tienes hambre
April 6, 2009

8th grade
What is the name of the large island that is part of New York?
March 23, 2009

Chemistry
What is the energy of an electron in the 2s orbital of a hydrogen atom?
February 9, 2009

6th grade
I need to come up with some math questions about the solar system.
October 28, 2008

geometry
Thank you very much. I could explain it (I thought) but couldn't express it in math terms. Thanks again
October 8, 2008

geometry
We are learning about proofs. We drew lines between noncollinear points. Our table showed 2 points >> 1 line segment, 3 point >> 3 line segments, 4 points >> 6 line segments, 5 points >> 10 line seg, 6 points >> 15 line seg. etc. Write an ...
October 8, 2008

3rd grade
3rd graders = x 4th graders = x 5th graders = x + 6 (this is because there are 6 MORE 5th graders than 3rd grade) Make an equation x + x + (x + 6)= 33 group like terms 3x + 6 = 33 subtract 6 from both sides to get x alone 3x = 27 divide both sides by 3 x = 9 PLUG IN 9 for x ...
October 8, 2008

economics
where do stocks go after being sold
September 15, 2008

personal finance
where do stocks go after being sold
September 15, 2008

math
coleen hid a coin equal rto fraction of a dollar behine her back. She said the freaction is smaller than 1/2 and greater than 1/20. What two possible coin could she have hidden. How do you know? Then said it was 5 time greater 1/20. what coin did she have.
May 15, 2008

MATH
THERE ARE 7 GIRLS ON A BUS EACH GIRL HAS 7 BACKPACKS IN EACH BACKPACK, THERE ARE 7 BIG CATS FOR EVERY BIG CAT THERE ARE 7 LITTLE CATS ? HOW MANY LEGS ARE THERE IN THE BUS?
December 13, 2007

history
in what direction do you travel to britan fom the us?
November 30, 2007

spelling
not a smile, but a
October 29, 2007

science
what would happen if your stomach stopped producing bile?
August 10, 2007

PHYSICS
A cylinder with a moveable piston holds 2.40 mol of argon at a constant temperature of 295 K. As the gas is compressed isothermally, its pressure increases from 101 kPa to 141 kPa. What is the final volume of the gas? I don't know where to begin. I tried using Pv=nRT: [(2....
June 21, 2007

life science
ok i really need help. like really bad. cant figure it out. ok here it is. a color blind man marries a woman with normal vision. of their three daughters, one is color blind. one of their two sons is also colorblind. what are the genotypes of the parents? please help me its ...
May 17, 2007

Math
Which is less 2t or 2,600 pounds 2 tons is 4000 lbs. 2 tonnes (t) are equal to 2000 kg, which is considerably more than than 2600 pounds. help i need hw help badd!
April 24, 2007

science
members of one species in a area are called http://en.wikipedia.org/wiki/Deme_(biology)
March 21, 2007

Science
I'm having trouble figuring out what the independent and dependent variables are in the following experiment: 1.
March 19, 2007

Low recovery
Ha I'm doing the same problem right now. I'm pretty sure its because the biphenyl will dissolve completely in the benzene at room temperature (not good for crystallizations).
September 26, 2006

Analogies (just one)-- please help
habit:break::job:quit
September 14, 2006

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