Total # Posts: 295
An airplane traveling 1011 m above the ocean at 145 km/h is going to drop a box of supplies to shipwrecked victims below. (a) How many seconds before the plane is directly overhead should the box be dropped? 1 s (b) What is the horizontal distance between the plane and the ...
October 24, 2010
the amount of solar energy that is intercepted by the earth is___by the __ of __. a) determind, lenght , daylight b) affected, presence, clouds in the sky c) influenced, phenomena, day and night d) influenced, phenomena, parallelism of axis e) all of the above
August 16, 2010
the amount of solar energy trhat is intercepted by the earth is___by the __ of __. a) determind, lenght , daylight b) affected, presence, clouds in the sky c) influenced, phenomena, day and night d) influenced, phenomena, parallelism of axis e) all of the above
August 16, 2010
This is what I have. Could you please correct my work? Thank you. Compute the equilibrium constant for Ni^2+ (aq) and Cd (s). reduction Ni²⁺(aq) + 2 e⁻ ⇌ Ni(s) ; E°_red = -0.25V -oxidation Cd(s) ⇌ Cd²⁺(aq) + 2 e⁻ ; E°_ox...
April 28, 2010
What am I doing wrong? I am trying to balance the equation: NO3^-(aq)+Sn^2+(aq)-->Sn^4+(aq)+NO(g) here are the coefficients I have. what is wrong with them? 2NO3^-(aq)+3Sn^2+(aq)+8OH-(aq)-->3Sn^4+(aq)+2NO(g)+4H2O(l)
April 27, 2010
Healthcare expenses can cause people to lose their homes, default on loans and (in general) cause people to stop contributing to the economy because they are unable to afford basic necessities. Advantages -healtcare for people without insurance -slows the increasing cost of ...
April 27, 2010
Ni (s) + Cd^2+(aq)-->Ni^2+(aq)+ Cd(s) MnO4^-1(aq)+ Al (s) ---> Mn^2+(aq)+Al^3+(aq) no matter what i do, i can't seem to balance either of these redox reactions. i'm always off. is there a trick to doing these? i need help please.
April 25, 2010
Hockey teams recueve 2 points when they win and 1 point when they tie. One season, a team won a championship with 66 points. They won 12 more games than they tied. How many winds dd the team have and how many ties?
March 21, 2010
A roller coaster is at the top of a 98.2 m hill and has a mass of 1831.0 kg. It is traveling at a velocity of 23.7 m/s. What is the coaster car's TOTAL energy? I took the eg=1/2mv^2 and plugged in (1831)(9.8)(98.2) and got 1762081.16 I then took the ek= 1/2mv^2 and plugged...
December 7, 2009
I don't know where to begin with this one because I don't recall my teacher giving us a formula for it. A baby carriage is sitting at the top of a hill that is 22.1 m high. The carriage with the baby weighs 15.8 N. What is the Ep for the carriage and baby in relation ...
December 7, 2009
I just wanna check if i am right. A car is traveling with a velocity of 42.3 m/s and has a mass of 2183.0 kg. Find the Ek of the car. i used the ek=1/2mv^2 and plugged everything in to get a total of 1953010.035 J .. is that right?
December 7, 2009
Use the table of values to estimate ⌠6 ⎮ f(x)⋅dx ⌡0 Use three sub intervals and the (a) left endpoints, (b) right endpoints, and (c) midpoints. If f is an increasing function, how does each estimate compare with the actual value? Explain your reasoning...
November 9, 2009
List the possible rational roots of each equation. Then determine the rational roots. 6x^4+35x^3-x^2-7x-1 The answer in the back of the book is: -1/3 and 1/2 I know that I'm supposed to use Descartes rule of signs. I found that there was 1 positive zero and 3 or 1 negative...
October 25, 2009
teresa and julia are among 10 students who have applied for a trip to washington DC. Two students from the group will be selected at random for the trip. What is the probability that teresa and julia will be the 2 students selected /
April 23, 2009
11th grade Algebra II
teresa and julia are among 10 students who have applied for a trip to washington DC. Two students from the group will be selected at random for the trip. What is the probability that teresa and julia will be the 2 students selected?
March 31, 2009
Physics - URGENT
The seventh harmonic of a one end closed pipe organ has a frequency of 732 Hz, on a day when the temperature is 10 degrees Celsius. How long is the pipe? How long would it be for 732 to be the first harmonic?
February 3, 2009
im writing a report on the causes of deforestation in the Amazonian rainforest. i need to explain how forest fires destroy the rainforest. up to now ive wrote about how the farmers burn parts of the rainforest to use for farms cattle ranches and to grow crops is there anything...
January 3, 2009
hey how u all doin? If a ball is thrown vertically upwards into the air. What is the main energy conversion that takes place as the ball rises towards its maximum height? thanks carl
December 10, 2008
Hi, Nearly all of the energy used on earth comes originally from the sun, and that solar radiation is intercepted at 1370 Wm^-^2 at the top of the atomsphere, and that 49%of this radiation is absorbed by the earths surface. If a shallow dish containing ice or warte, placed on ...
December 5, 2008
a 506g piece of copper tubing is heated to 89.5C and placed in an insulated vessel containing 159g of water at 22.8C. Assuming no loss of water and a heat capacity for the vessel of 10.0J/K, what is the final temperature of the system (c of copper = 0.387 J/g*K)?
November 15, 2008
Management at your project management firm wants to ensure staff members are fully trained on new technologies before planning, developing, and maintaining information technology projects for clients. As a result, your managers have decided to implement training for your ...
June 22, 2008
Dancing Skeletons by Katherine Dettwyler
First, Dancing Skeletons is an ethnography, not a novel. The former is a non-fiction, written description of a culture. The latter is a work of fiction. Second, a good representation of ethnocentrism can be found on pages 27-35. Ethnocentrism is that tendency to compare ...
April 11, 2008
the 3 reasoners of multiplication are 1)strategic additive reasoners. 2) Strtategoc multiplicative reasoners. 3) One worders and double counters. Could i please have examples of each.
February 1, 2008
I have a problem, which requires I solve the following system of linear inequality graphically. my textbook is vague and does not provide online examples or instruction to assist me withinfo to work the problem. Please help? Thank you. 3x - y is lessor than or equal to 6 x is ...
January 24, 2008
Carol! Thank you so much! I am to solve by substitution. I am a bit confused as to now having two separate y and x components, rather than one set of x and y/ If you have time, Please help me to understand/ Thank you. Carl
January 23, 2008
Damon! Thank you! You are very generous with your skill and knowledge. If you have time, would you take a look at some other algrbra problem I need help and understanding with? Unlike some others, you have been most thourough in explaining the process. Thank you, Carl.
January 23, 2008
4. A customer wants to make a teepee in his backyard for his children. He plans to use lengths of PVC plumbing pipe for the supports on the teepee, and he wants the teepee to be 12 feet across and 8 feet tall (see figure). How long should the pieces of PVC plumbing pipe be?
January 20, 2008
At a fair run by a local charity organization, it costs 50 cents to try ones luck in drawing an ace from a deck of 52 playing cards. What is the expected profit per customer, if they pay $4 if and only if a person draws an ace? I answered the identical question for ...
March 25, 2007
Brigham Young chose the Great Salt Lake valley because of its _________ (9 letter word) http://unicomm.byu.edu/about/brigham/ Scroll down and go to page 4. http://www.pbs.org/weta/thewest/people/s_z/young.htm http://en.wikipedia.org/wiki/Brigham_Young Be sure to scroll all the...
February 13, 2007
You know that when he is moving with a constant velocity, a=0 , when he is moving with acceleration, a=1.29 m/s^2 . Now plug in the numbers you have into the equations and you will come up with the answers you provided.
February 8, 2007
How do I express these in scientific notation AND Log10 form? 1) ln(8.1) 2) 32.8 x 10^-2 + 3.15 x 10^-1 3) 10^-2 x 10^4.5 4) 10^-45 5) 8^2.34 Please show some effort, and please stop posting under multiple names.
January 21, 2007
How do I express these in scientific notation AND Log10 form? 1) ln(8.1) 2) 32.8 x 10^-2 + 3.15 x 10^-1 3) 10^-2 x 10^4.5 4) 10^-45 5) 8^2.34 I will be happy to critique your work here. Most of these require conversion. Do the math, and let your calculator do the log10 form. ...
January 21, 2007
romeao and julette first saw each other 270 feet apart.Romeao ran towards julette at a rate of 16 feet per sec, at the same moment jullette began running towards Romeo at a rate of 14 feet per sec. how many seconds until they meet how far did romeao run Im not a 100% sure but ...
December 1, 2006
the temperature at Kent is -7 degrees and increasing at 2.5 degrees per hour. The temperatire at row is 19 degrees decreasing at 4 degrees per hour. When will they be the same? and what temperatore? let t = hours running time. -7+2.5t = temperature at Kent at time t. 19-4.0t...
November 30, 2006
can someone help me remove this infostealer virus, Norton 2006 finds it but doesn't give me the option to remove it, it says it cant remove it. do you have the option "Quaranteen"? If so do that.
November 9, 2006