Friday

May 6, 2016
Total # Posts: 285

**PHYSICS/ GRAVITATIONAL CONSTANT**

I DID THAT BUT THE ANSWER IS WRONG. IDON'T KNOW WHY
*November 12, 2010*

**PHYSICS/ GRAVITATIONAL CONSTANT**

Three masses are arranged in the (x,y) plane. The X and Y units are meters 4kg at (-1,5 3kg at (1,1) 5kg at (0,0) What is the magnitude of theresulting force on the 5kg mass at the origin? The universal gravitational constant is 6.673e-11 N*m^2/kg^2. Answer in units of N.
*November 12, 2010*

**chemistry**

A 2.85 g sample of an unknown chlorofluorocarbon is decomposed and produces 558 mL of chlorine gas at a pressure of 756 mmHg and a temperature of 298 K.What is the percent chlorine (by mass) in the unknown chlorofluorocarbon?
*November 8, 2010*

**Algebra**

I know the answer to the question, but don't know how to write it out. What is the percentage of increase from 58,000 to 89,000.
*October 31, 2010*

**physics**

Can an adult male be rescued from a fall by tying a rope to a car's axle?
*October 9, 2010*

**physics**

A car starts from rest and accelerates uniformly over a time of 6.5 seconds for a distance of 150 m. Determine the acceleration of the car.
*October 7, 2010*

**science **

what events or objects were studied in Hubble's paper A RELATION BETWEEN DISTANCE AND RADIAL VELOCITY AMONG EXTRA-GALACTIC NEBULAE?
*October 3, 2010*

**physics**

A deep mountain valley is separated by two vertical cliffs. One cliff is 600 meters high and the other is 400 meters high. A cable car runs from the foot of each cliff to the top of the other cliff. At what height above the ground do the two cable cars cross? Be sure to draw a...
*September 19, 2010*

**Physics/math**

A deep mountain valley is separated by two vertical cliffs. One cliff is 600 meters high and the other is 400 meters high. A cable car runs from the foot of each cliff to the top of the other cliff. At what height above the ground do the two cable cars cross? Be sure to draw a...
*September 18, 2010*

**7th grade math**

Write and simplify an expression for the perimeter of the triangle. side A)3x, side B) 5x-4 and side C)2x+5. Thank you!
*September 12, 2010*

**7th grade Math**

Write and simplify an expression for the perimeter of the rectangle. side A=x+6 Side B=4x-5. Thank you!
*September 12, 2010*

**7th grade**

Write and simplify an expression for the perimeter of the triangle. side A-4x+3, side B-6X and side C-3x-1. Thank you!
*September 12, 2010*

**9th grade**

Explain how to workbackwardfrom a constant second diffrence to extend the following sequence 1,6,16,31,51,76,...
*September 6, 2010*

**math**

write an example of the associative proerty of addition.
*August 25, 2010*

**Statistics**

Hello...I need help with the following question, I have the answer but am not sure how to solve it. Any help would be greatly appreciated. Thank you What is the 'z' value assuming the normal distribution applies in a right-tailed test within area equal to .01? Answer: ...
*July 25, 2010*

**college algebra**

how to solve this problem. Completing the square. Find the value of a such that u^2-8u+a is a perfect square
*July 1, 2010*

**Criminal justice system 250**

Why is it important for a security professional to know specifics about the particular target environment to which they are assigned? How can experienced security professionals prepare themselves for challenges and opportunities they have never encountered before? Is it ...
*May 13, 2010*

**trig**

verify: cot(-t)+csc(-t)/sin(-t)=1/1-cos(t)
*May 3, 2010*

**Statistics - Is it from Normal Distribution**

I think I know how to answer the following question IF I assume that the distribution is normal - however, since the question doesn't say that it comes from a normal distribution - should I proceed differently? Question reads: The mean IQ among members of a club is 118 ...
*April 28, 2010*

**Statistics**

The applet is great! But I wonder, given the information I have, can I assume that the distribution is normal? (The mean IQ among members of a club is 118 with a standard deviation of 9.46. What percentage of the members had IQ scores of 115 or higher?) If it isn't normal...
*April 28, 2010*

**Statistics**

The mean IQ among members of a club is 118 with a standard deviation of 9.46. What percentage of the members had IQ scores of 115 or higher?
*April 28, 2010*

**science**

Follow on the Sall Sue question earlier. What frequency would be required for sally and her cheerful and hard-wroking partner to produce the standing wave with three nodes. Identify the steps.
*April 23, 2010*

**physics**

Sally and a partner holds the ends of a spring 4 meters apart. There are 5 nodes in the standing wave produced. Sally moves her hand from the rest position back and forth along the floor 20 times in 4 seconds. Determine the following: Wavelenght of wave sally sue sent ...
*April 22, 2010*

**economics**

Sally and a partner holds the ends of a spring 4 meters apart. There are 5 nodes in the standing wave produced. Sally moves her hand from the rest position back and forth along the floor 20 times in 4 seconds. Determine the following: Wavelenght of wave sally sue sent ...
*April 22, 2010*

**physics help**

remember that the boat moves as well...the dog is a system and the boat is a system
*March 26, 2010*

**Physics**

I'm having trouble understanding which formula to use to answer this question. What is the apparent weight of an astronaut weighing 77kg shortly after blasting off in a roacket at an upward acceleration of 80/meters per second squared? I know he/she will feel about 3 times...
*January 31, 2010*

**Science**

I can find anything on these questions I need to answer to pass year nine. My teacher said he doesn't matter where the answers come from as long as I pass and don't have to repeat. PLEASE HELP ME! Due tomorrow! 1. List 5 latest developments in sports footwear. Describe...
*December 3, 2009*

**high school**

alkali is a metal not encluding hydrogen and it is very reactive metals
*September 21, 2009*

**math**

in subtraction: what does it mean to front-end estimation when you subtract 59 from 16
*September 17, 2009*

**social studies**

I need help on finding information on the Patriot (American Revolution)about reports on battles won and reports on battle lost.
*November 16, 2008*

**statistics**

7.62
*November 6, 2008*

**Limits**

Find the limit of sin4x/(sqrt(x)) as it approaches positive infinity.
*October 23, 2008*

**Math**

the area of a cirlce is 460ydsq. Find the radiusbof the circle.
*October 13, 2008*

**Chemistry**

The symbol is supposed to represent the change in temperature for the solution.
*October 13, 2008*

**Chemistry**

I forgot to add that the Hrxn is -112.3.
*October 13, 2008*

**Chemistry**

I need help with this problem: 50.0 mL of 4.4 g/L AgNO3 is added to a coffee-cup calorimeter containing 50.0 mL of 4.4 g/L NaI, with both solutions at 25Â°C. a).What is Î”Tsoln (assume the volumes are additive and the solution has the density and specific ...
*October 13, 2008*

**Math/Algebra**

if you add one number divisible by n and one number not divisble by n will the result be divisible by n? and.. if you add two numbers not divisible by n will the reult be dvisible by n? explain.
*October 6, 2008*

**math**

when doe it make the most sense to use a fraction?
*September 9, 2008*

**enviromental science**

If conservation and preservation are bascically the same then why do we have two different groups that are opposing and not working together? Or is the problem that conservationist will allow change and preservationist will not?
*July 2, 2008*

**enviromental science**

What exactly are the differances of conservation and preservation?
*July 2, 2008*

**English**

I can't thank you enough for taking the time to read through this and help me out the way that you did. Thank you very much! CJ
*March 29, 2008*

**English**

I will just post my essay here if that is ok? I had to write an essay on a childhood memory. Thank you again for checking this, I truly appreciate it. In December of 1979, I was six years old and Christmas day was arriving soon. It was almost a ritual on every Christmas Eve my...
*March 29, 2008*

**English**

Oh my ...that is fantastic....thank you so much. Should I post it in this post or a new one?
*March 29, 2008*

**English**

I am just curious if you know of any one I could submit an English Essay to. It is less than one page and I need someone to check grammar, spelling etc.... I didn't think this site would accept something like that but was wondering if you know of a website that could do ...
*March 29, 2008*

**math**

Simplify: 35xy4z2 _______ 7y2z
*March 11, 2008*

**algebra 1(Polynomials)**

Simplify: (5x2y3z)(6xyz2)
*March 11, 2008*

**algebra**

If perimeter of an isoceles triangle is 37 inches, and the lengths of both sides are 6 inches less than 3 times the length of the base, what is the length of all three sides?
*January 29, 2008*

**financial management**

sorry it is supposed to be 8.0% fixed interest rate.
*January 13, 2008*

**financial management**

suppose you purchase a home for $150,000.and obtain a 90% mortgage loan, 30 yr. maturity, at a fixed annual interest rate of 80% with deferred monthly payments. What is the monthly payment for principal and interest on this loan?
*January 13, 2008*

**finance management**

i think you take $300.times 7% times 5 yrs.
*January 10, 2008*

**finance management**

What is the future value of a 5 yr. annuity due that promises to pay $300.00 each yr? Assume that all payments are reinvested at 7% a yr., until Yr. 5.
*January 10, 2008*

**finance management**

It may help if I knew how to do the equation.
*January 10, 2008*

**finance management**

John Roberts has $42,180.53 in a brokerage account, and he plans to contribute an addtional $5,000.00 to the account at the end of the year. the brokerage account has an expected annual return of 12%. If John's goal is to accumulate $250,000.00 in the account, how many ...
*January 10, 2008*

**finance management**

If you deposit money into your account that pays 6.5% interest, how long will it take for you to double your money?
*January 10, 2008*

**finance management**

what is the future value of a 5 yr. ordinary annuity due that promises to pay $300.00 each year? The rate of interest being 7%
*January 10, 2008*

**Algebra**

you are about to take a test that contain questions of type A worth 4 points and of type B worth 7 points. You must answer at least 5 of type A and 3 of type B, but time restricts answering more than 10 of either type. In total, you can answer no more than 18. How many of each...
*November 12, 2007*

**social studies**

What is the difference between a canal and a river?
*October 3, 2007*

**social studies**

what are the two areas of the radical republicans help independent black people
*October 1, 2007*

**CULTURAL COMMUNICATION**

The customer service department at Electric Supply Company is excited to be the department chosen to visit our sister company in England for a month. We had a department meeting to determine who would be accompanying me on this trip. After a long discussion with each team ...
*August 25, 2007*

**HUM 130**

What events and figures have shaped the development of Islam in the United States? These sites explain how Islam has developed in the U.S. http://www.islam101.com/history/population2_usa.html http://en.wikipedia.org/wiki/Islam_in_the_United_States
*May 30, 2007*

**HUM 130**

How has Christianity, a faith based on the teachings of one text (the Bible), divided into so many denominations? There are many different ways of interpreting any religious book, including the Bible. Also, people have different personal experiences that cause them to perceive...
*May 30, 2007*

**Physics**

A wave traveling in the +x direction has an amplitude of 0.50 m, a speed of 5.7 m/s, and a frequency of 18 Hz. Write the equation of the wave in the form given by either Equation 16.3 or 16.4. (Answer in terms of t and x. Assume standard units.) please check my answer: y= A ...
*May 1, 2007*

**Physics**

A skier wears a jacket filled with goose down that is 15mm thick. Another skier wears a wool sweater that is 7.0mm thick. Both have the same surface area. Assuming the temperature difference between the inner and outer surfaces of each garment is the same, calculate the ratio(...
*April 13, 2007*

**Physics**

A skier wears a jacket filled with goose down that is 15mm thick. Another skier wears a wool sweater that is 7.0mm thick. Both have the same surface area. Assuming the temperature difference between the inner and outer surfaces of each garment is the same, calculate the ratio(...
*April 13, 2007*

**Physics, still don't get it!**

Good morning. I know I have posted this question several times but I am still getting the wrong answer. So I decided to repost it to get a fresh start. Thanks for your help! A glass bottle of soda is sealed with a screw cap. The absolute pressure of the carbon dioxide inside ...
*April 10, 2007*

**Physics repost please check**

A glass bottle of soda is sealed with a screw cap. The absolute pressure of the carbon dioxide inside the bottle is 1.80 x10^5pa. Assuming that the top and bottom surfaces of the cap each have an area of .0004M^2, obtain the magnitude of the force that the screw thread exerts ...
*April 9, 2007*

**physics**

A glass bottle of soda is sealed with a screw cap. The absolute pressure of the carbon dioxide inside the bottle is 1.80 x10^5pa. Assuming that the top and bottom surfaces of the cap each have an area of .0004M^2, obtain the magnitude of the force that the screw thread exerts ...
*April 8, 2007*

**physics**

A water bed has dimensions of 1.83mx1.86mx.238m. The floor of the bed room will tolerate an additional weight of no more than 6660N. Find the weight of the water in the bed and determine whether it should be purchased. The weight of the water in the water bed is (volume* g* ...
*April 7, 2007*

**physics**

when an object of mass M1 is hung on a vertical spring and set vertical simple harmonic motion, its frequency is 12 Hz. When another object of mass m2 is hung on the spring along with m1, the frequency of the motion is 4hz. Find the ratio m2/m1 of the masses. Dont you have an...
*April 1, 2007*

**physics**

How do I convert from kg to Newtons? You cant. kg is mass, newtons is force. If a mass is in a gravity field, then force= mass*g where g the graviational field constant is in newtons/kg (or m/s^2)
*March 28, 2007*

**physics**

lunch tray is being held in one hand, as the drawing illustrates. The mass of the tray itself is 0.240 kg, and its center of gravity is located at its geometrical center. On the tray is a 1.00 kg plate of food and a 0.300 kg cup of coffee. Obtain the force T exerted by the ...
*March 28, 2007*

**Physics**

A rotating door is made from four rectangular glass panes. The mass of each pane is 90kg. A person pushes on the outer edge of one pane with a force of F=70N that is directed perpendicular to the pane. Determine the magnitude of the door's angular acceleration. in rad/s2 I...
*March 24, 2007*

**Physics**

A woman stands at the center of a platform. The woman and the platform rotate with an angular speed of 4.00 rad/s. Friction is negligible. Her arms are outstreched, and she is holding a dumbbell in each hand. In this position the total moment of inertia of the rotating system...
*March 21, 2007*

**Physics**

A bowling ball encounters a 0.76m vertical rise on the way back to the ball rack, as the drawing illustrates. Ignore frictional losses and assume that the mass of the ball is distributed uniformly. If the translational speed of the ball is 3.80m/s at the bottom of the rise, ...
*March 21, 2007*

**ap history**

who was the most important embodiment of the enlightenment in america a- benjamin franklin b-john locke c-isaac newton d-thomas jefferson This site mentions two of those men as being embodiments of the Enlightenment in America. (Broken Link Removed) It would be hard to pick ...
*March 20, 2007*

**ap history**

what did the great awakening, intercolonial trade and the rise of the colonial assemblies have in common? Please note that we don't do students' homework for them. Once you have come up with your response, please repost, and someone here will be happy to critique your ...
*March 20, 2007*

**ap history**

the first large group of german immigrants moved to america seeking? http://www.google.com/search?q=first+german+immigrants&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA Good information here. =) Thank you for using the Jiskha Homework Help ...
*March 20, 2007*

**Physics**

A ceiling fan has two different angular speed settings: 1 = 475 rev/min and 2 = 170 rev/min. What is the ratio a1/a2 of the centripetal accelerations of a given point on a fan blade? Centripetal acceleration at a distance R and angular speed w is a = R w^2. The ratio of the ...
*March 15, 2007*

**Physics**

an automobile tire has a radius of 0.350M, and its center forward with a liner speed of v=13.0m/s. (a) Determine the angular speed of the wheel. (Assume that there is no slipping of the surfaces in contact during the rolling motion.) (b) Relative to the axle, what is the ...
*March 14, 2007*

**Physics**

The warranty on a new tire says that an automobile can travel for a distance of 92,000km before the tire wears out. The radius of the tire is 0.33m. How many revolutions does the tire make before wearing out? hello CJ I think we are in the same class. I had sent you an e-mail...
*March 14, 2007*

**Physics**

A 2.50g bullet, traveling at a speed of 425m/s, strikes the wooden block of a ballistic pendulum. The block has a mass of 270g (a) find the speed of the bullet/block combination immediately after the collision (b) how high does the combination rise above its initial position...
*March 2, 2007*

**stoichiometry**

How many grams of Fe is needed to make 8 g of FeO3. I was given Fe + H2O ---> H2 + FeO3. I balanced it: 2Fe +3H2O -----> 3H2 +Fe2O3. divided 8 by 160 (sum of parts of Fe2O3 got .05 multiplied .05 times 2 because ratio was 2:1 and got 0.1 multiplied 0.1 times 56 (value of...
*December 1, 2006*

**science**

HI what does Switch mean in science terms...
*September 26, 2006*

**spelling**

i need help unscrambling this word u a d c e t u a n i http://www.unscramble.net/ =)
*September 23, 2006*

**Math geometry**

what is 90 plus 2 divided 7.89? Try this on your calculator... 11111111 times 111111111 Neat.
*August 16, 2005*