Posts by eric
Total # Posts: 801
college physics (inertia)
As a result of friction, the angular speed of a wheel changes with time according to dθ/dt = ω0 *e^-(σ*t) where ω0 and σ are constants. The angular speed changes from an initial angular speed of 3.08 rad/s to 1.58 rad/s in 3.92 s. a)Determine the ...
March 30, 2010
A(n) 13,300 lb railroad car traveling at 7.4 ft/s couples with a stationary car of 6790 lb. The acceleration of gravity is 32 ft/s^2. What is their velocity after the collision (ft/s)? And what impulse did the first car receive? Answer in units of lbs. Any help would be ...
March 23, 2010
It is based on the idea the the velocity of money is constant. Monetarist advocated such a policy in the 1970's and Volcker tried it around 1980 and it a did not work so no one advocates it any more.
February 26, 2010
Monochromatic light falls on two very narrow slits 0.035 mm apart. Successive fringes on a screen 4.80 m away are 5.8 cm apart near the center of the pattern. What is the wavelength of the light?
February 21, 2010
Two fully charged capacitors (C1 = 2.00uF, q1=6.00uC,C2=8.00uF, q2 = 12.0 uC). The switch is closed, and the charge flowed until equilibrium is re-established, which occurs when both capacitors have the same voltage across their plates. Find the resulting voltage across either...
February 17, 2010
The drawing shows a large cube (mass = 48 kg) being accelerated across a horizontal frictionless surface by a horizontal force . A small cube (mass = 2.1 kg) is in contact with the front surface of the large cube and will slide downward unless is sufficiently large. The ...
February 15, 2010
The intensity of a particular earthquake wave is measured to be 5.0 multiplied by 106 J/m2·s at a distance of 55 km from the source. (a) What was the intensity when it passed a point only 3.0 km from the source? (b) What was the rate energy passed through an area of 7.0...
January 31, 2010
When a 65 kg person climbs into a 1000 kg car, the car's springs compress vertically by 3.1 cm. What will be the frequency of vibration when the car hits a bump? Ignore damping.
January 27, 2010
It was noticed that some cars have license plates with 3 letters followed by three numbers while other license plates have 3 numbers followed by 3 numbers if neither letters nor numbers can repeat what is the probability of getting the letter A in the first letter slot and ...
January 18, 2010
It you roll two dice find the number of outcomes for each of the following events: A)rolling two prime numbers B) rolling at least one odd number A) i got 9 outcomes B) i got 27 outcomes i used a table to figure this out are my solutions correct?
January 12, 2010
A ball of mass m makes a head-on elastic collision with a second ball (at rest) and rebounds with a speed equal to one-fourth its original speed. What is the mass of the second ball?
December 10, 2009
The MorTex Company assembles garments entirely by hand even though a textile ma- chine exists that can assemble garments faster than a human can. Workers cost $50 per day, and each additional laborer can produce 200 more units per day (i.e., marginal product is constant and ...
November 17, 2009
Hi guys, please help me solve this question. Please tell me how exectly should I solved this question. Thanks. On September 1, 2000, ABC Company received an 7000, 12%, 120 day note from a credit customer wishing to extend its repayment period. On october 1st, 2000, thirty days...
November 3, 2009
Sorry, I actually have a question. According to the question that was posted. If I were to solve this question, without knowing the radius of the earth before hand. Is there any other solution??
October 26, 2009
I need some help, I'm currently writing a ''World war one Trench warfare letter'' I'm supposed to write a letter just like soldiers did in world war 1, and I'm all out of ideas.. help?
October 14, 2009
The direct approach for delivering bad news is best for persons who A) you do not know well. B) prefer straightforward messages. C) are unfamiliar with your company. D) All of these. im not sure if the direct approach is based on people knowing each other or not.
October 6, 2009
You have a 22L cylinder of helium at a pressure of 150atm and a temperature of 31C. How many ballons can you fill, each with a volume of 5.0L, on a day when the atmospheric pressure is 755mmHg and the temperature is 22C? I know I use PV=nRT, but what numbers do I plug in and ...
September 27, 2009
You have a 22L cylinder of helium at a pressure of 150atm and a temperature of 31C. How many ballons can you fill, each with a volume of 5.0L, on a day when the atmospheric pressure is 755mmHg and the temperature is 22C?
September 27, 2009
Two objects are connected with a string. In the quantitative treatment of the problem we assume that the string exerts a tension force of magnitude T on each of the two objects. What do we need to assume for this assumption to be valid? a) the string may hang loose between the...
September 26, 2009
When trying to figure up sales tax on a problem how would one write it out I have searched the site some say 1.05 some say 0.05 and something about moving a decimal over 2 spaces to the left. Im not getting it Like the problem is 3 shirts is 9.99 ea we know this is $29.97 then...
September 8, 2009
10th grade english
Ok, I need help on the book "The Road" By cormac McCarthy. I need to know 3 themes, the plot, the setting and how it affects the story, and Literary devices used in the story! Thanks so much!
July 26, 2009
Walterwants to replace some fence on his farm the wooden rail fence cost about $60 for the wood and $50 for labor to install a fence 12 feet long. He estimated he would need276 feet of new fence, however when he measured it he realized he would only need 216 feet of fence what...
April 5, 2009
Please double check...GK or Dr.Bobb22
hey if u guys are still around, i think e is wrong. check general chem text book pg 682 table 16.4 it shows u the Ka equation for bicarbonate and even the ka value
January 19, 2009
Two infinitely-long lines of charge run parallel to the z axis. One has positive unifonn charge per unit length, IvO, and goes through the x y plane at x=O, y=s/2. The other has negative unifonn charge per unit length, -A, and goes through x=O, y=-s/2. Nothing changes with the...
October 20, 2008
physics gauss law
In a spherical region, the voltage is measured to be spherically symmetrical, with V = VCr) = wrg The constants, wand g, are positive. a. Find the radial electric field. b. Use Gauss' Law to find the charge enclosed in a sphere of radius r. c. Find the charge ...
October 20, 2008
The square root of the lava lamp is champagne, and the ace of spades is tattooed on the wrist of the man who invented the poker chip. Assuming poker chips are round, what will this man's last words be?
October 17, 2008
imagine you are living in the united states in the 1890's. write a letter to the president persuading him to support or oppose an imperialismt policy for the united states. be sure to use standard grammar, spelling, sentences structure, and punctuation.
August 24, 2008
What are 3 5-digit numbers that have the sum of their digits equal? Is it as simple as finding a random 5 digit number than switching the number order and making 2 new numbers with the same digit sum? thank you
August 19, 2008
I am given the following reaction: 2NH3(g) -----> N2(g) + 3H2(g) 6.4 mols of ammonia gas has been put into a 1.7 L flask and has been permitted to reach equilibrium in accordance to the reaction listed above. If the equilibrium mixture has 4.2 mols of nitrogen, what is the ...
May 26, 2008
I need to relate the song "Don't Matter" to Romeo and Juliet. I need to talk about how it relates to the play (character, theme, events...etc.) the lyrics for "Don't Matter" : Nobody wanna see us together But it don't matter no 'Cause I got ...
May 22, 2008
Imagine that the efficient provision of telephone calls in a medium-sized city involves an initial investment of $100 million financed by borrowing at 6 percent and variable cost of 5 cents a phone call. The phone company's annual fixed cost would be $6.0 million (6.00 ...
April 28, 2008
'Rain' A teacher asked Paul what he would remember from third grade, and he sat a long time before writing "this year somebody tutched me on the sholder" and turned his paper in. Later she showed it to me as an example of her wasted life. The words he wrote ...
April 12, 2008
What is the algebraic expression for the ratio ac,second/ac,minute of the centripetal accelerations for the tips of the second hand and the minute hand? Express your answer in terms of the periods Tsecond and Tminute. (Answer using T_m to be the period of the second hand and ...
April 3, 2008
If this is your first programming language: If you find Java too difficult try learning a simpler programming language first (Basic, C, etc.) Java is by no means extraordinarily difficult to learn, but some people find it easier to approach as a second language.
March 27, 2008