Total # Posts: 297
4th grade math
Please help advise if my answer is correct Is the solution of 25 + n = 30 greater or less than 30? Explain how you know without solving it? By looking at the equation, I know that the value of the n = would be 5. It is not greater or less. It should be equal. Please let me ...
October 25, 2011
AP World History Please help
Please help me. Under which ruler was religious tolerance and Hindu-Muslim intermarriage was allowed? Which social group is going to rise to prominence because of trade with the new world? How did exploration of the new world transition from conquest to settlement in the new ...
June 24, 2011
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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 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
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
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
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
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