Friday

November 21, 2014

November 21, 2014

Number of results: 115,159

**Physics help please!**

Explain why the sum of the masses of the uranium nucleus and of the neutron does not equal the total mass of the products of the reaction. I guess its a theory question. Someone please explain!
*September 12, 2014 by Ariana*

**physics - please explain further**

Can someone please explain the answer I got for a question I previously posted on this page? I don't understand the solution I was given and even when I try it, I'm not getting the right answer.
*April 21, 2009 by Lucy*

**socials**

can u please explain the methaphor "slow dawns are caught in great wooden bowls" please explain with detail please please need fast
*March 5, 2011 by JACKSON !ASAP!!!!*

**Science**

Explain the energy transformations during skydiving Explain what happens once a skydiver reaches terminal velocity please help...i cant find any information...please note that I need to EXPLAIN
*May 4, 2014 by Anonymous*

**Physics**

Does the solar powered calculator work when there is no bright light falling on the solar panel? Explain. I think it does but I don't know why please help explain this. Thank you
*March 10, 2014 by Cherie*

**PHYSICS**

Using the motor principle explain why a motor is rotating in the direction indicated. I seriuosly have no idea, please help explain this theory to me.
*February 6, 2010 by Sarah*

**Social Studies**

PLEASE EXPLAIN IN YOUR OWN WORDS PLEASE PLEASE HELP IN YOUR OWN WORDS PLEASE. :( :( I REALLY NEED HELP PLEASE HELP ME PLEASE :( :( 1) Explain the similarities and differences between corporate farms and mixed-crop farms. 2) Identify two problems resulting from urban sprawl in ...
*March 29, 2013 by Mary-Jane *

**Science - Start of Physics**

I need help with the following: Given below is the position-time graph representing motions of two runners, Nick and Ian. Use this graph to determine which runner has greater average velocity. For this one, I know the answer is 2m/0s, but I don't know if they want me to ...
*February 21, 2014 by Brady*

**Science**

PLEASE HELP MY DAUGHTER WANTS ME TO CHECK HER HOMEWORK AND I DON'T KNOW TO MUCH ABOUT SCIENCE LOL! BUT PLEASE HELP PLEASE PLEASE HELP ME PLEASE 'IN YOUR OWN WORDS PLEASE' PLEASE PLEASE PLEASE 'IN YOUR OWN WORDS' IN YOUR OWN WORDS PLEASE' I'M BEGAN YOU PLEASE PLEASE ANYBODY ...
*April 8, 2013 by Bella (The Parent) *

**math(help)**

please help someone explain this please!! The length of a marathon is 138,435 ft.each stride,or step,by a particular runner is 3 ft long.does the number of strides the runner takes fit evenly into the length of the race?(EXPLAIN ANSWER PLEASE) --------------------------- IS 38...
*November 21, 2013 by matt*

**Science - please please help**

1. Explain why conduction, convection, and advection cannot occur in space. ^is it cause there is no gravity in space? 2. Does warm water rise or fall in cold water? Explain why this happens. 3. Explain why rocks and soil are poor heat sinks. Thanks in advance.
*January 16, 2008 by Kim*

**Maths-can someone explain something to me???**

hey, can someone explain vectors to me? im soooooo lost, I don't understand them at ALL. please please please help me. :(
*February 18, 2013 by Corie*

**Physics please explain**

In the quantum mechanical picture of the hydrogen atom, the orbital angular momentum of the electron may be zero in any of the possible energy states. For which energy state must the orbital angular momentum be zero? n = 1 n = 2 n = 3 n = 4 Give your reasoning. I am not sure ...
*December 14, 2007 by Mary*

**Physics**

Most housewives use spin dryers to dry their clothes. Explain how water is removed from the clothes in a spin dryer. PLEASE EXPLAIN! :)
*October 31, 2009 by Shane*

**physics help please!!!**

The tires of a car make 63 revolutions as the car reduces its speed uniformly from 94.0 km/h to 58.0 km/h. The tires have a diameter of 0.88 m. What was the angular acceleration of each tire? And If the car continues to decelerate at this rate, how much more time is required ...
*March 26, 2010 by Anonymous*

**Algerbra**

A teacher did this problem with us in class but I dontn get it please explain. 2xy + 6 ------- 3y + 4x x = 2 y = 6 answer 3 please explain!
*August 30, 2011 by lee*

**algebra**

Please explain:Simplify by removing factors of 1 explain process and exponents steps please.
*May 24, 2012 by plz help*

**Pre-Calculus**

Could you please explain how to use a matrix (matrices) to solve a system of linear equations (two variables)? My book doesn't explain it in a way I can understand. Please and thank you.
*January 24, 2013 by Caroline*

**Social Studies**

PLEASE EXPLAIN IN YOUR OWN WORDS PLEASE PLEASE HELP IN YOUR OWN WORDS PLEASE. :( :( 1) Explain the similarities and differences between corporate farms and mixed-crop farms. 2) Identify two problems resulting from urban sprawl in the western region of the United States. If ...
*March 28, 2013 by Jane*

**Physics**

Why is acceleration the same for all free-falling objects regardless of mass and distance? Please don't say according to this formula or something. could you please actually explain the theroy behind it.
*April 2, 2009 by Lena*

**math**

Saying that 4<(sq.root of x)<9 is equivalent to saying what about x ? a. 0<x<5 b. 0<x<65 c. 2<x<3 d. 4<x<9 e. 16<x<81 Please help. Does this problem relate to 'x'values on the xy coordinate system ? If so please explain the concept here. If...
*July 26, 2010 by Cliff*

**Physics**

When James applied the brakes to his car, it slows unifromly from 15.0 m/s to 0.0 m/s in 2.50 s. How many meters before a stop sign must she apply her brakes in order to stop at the sign? Answers: 6.0m 37.5 m 18.8 m 48.0m Please help-I've just started Physics last week and I'm...
*September 6, 2010 by Ian*

**Sosial Studies**

ok. so im suposed to explain the preamble and im stuck. how would i explain this.... provide for the common defense...... but then i got to explain this.... promote the general welfare...... HELP ME PLEASE..
*January 13, 2010 by Presley*

**math please help**

Inverse Trigonometric Functions please explain this to me in mathematical steps please how to solve sin^(-1) (-1/2) this equals - pi/6 i know that sin^(-1) domain and range switch from original sin but i don't know how to apply that... i need an mathematical explanation or if ...
*April 14, 2011 by Amy~ *

**HELP! PHYSICS LABS!!**

CAN someone please help me...I am so confused and I have little time left to do my assingment, please! I am freaking out! Please help me!! Can someone please explain why when the centripetal force increases, so does the radius, and why when Centripetal force increases, so does...
*October 2, 2007 by Cooper-Nichol*

**Physics**

PLEASE HELP!! The x and y cooridinates of an object are given by x(t) = (10 m/s)t + (5 m/s2)t2 + (3 m/s3)t3 y(t) = (20 m/s)t - (10 m/s2)t2 + (2 m/s3)t3 where x and y are in meters and t is in seconds. What is the object's acceleration at t = 1 s? Please explain in detail how ...
*September 14, 2010 by Indira*

**physics**

1/2 [vo + (v0 + at)]t ? please explain every step
*August 29, 2011 by zevi*

**grade 12 english**

please explain...metaphors compare two things...example "gathering clouds" and "raging storms" ...am I comparing these to obama's oath...i need to know if i state this as imagery or a metaphor...please explain
*January 31, 2009 by mike*

**please help**

You know that a cetrain electroscope is charged because the foil extends when there is nothing near to influence it. when a balloon rubbed with fur is brought near (but not near to change the net charge on the electroscope), the gold foil is seen to move slightly downward. Is ...
*January 15, 2009 by jen*

**physics**

thanks for the answer drwls. can you please explain to me, how it happened?
*December 4, 2011 by gem*

**physics**

can someone please explain f1d1 = f2d2
*February 21, 2012 by jenny*

**physics**

can you please explain how the process of doping is conducted.
*April 26, 2014 by Robert*

**Physics**

Car A is moving at a constant speed of 10.0 m/s and passes Car B which is at rest. 10 seconds after, the latter follows with an acceleration of 0.5 m/s2. Determine the distance that the latter has to travel before it overtakes the former. does it require quadratic formula? Oh ...
*August 12, 2012 by Anna*

**organic chemistry**

1. Arrange the following in order of decreasing reactivity toward nitration. Fully explain please I could use some help!! A. acentanilide, b. bromobenzene, C. acetophenone, D. toluene 2. Explain why p-nitrophenol is a stronger acid than phenol itself? Would p-methoxyphenol be ...
*June 17, 2014 by Anonymous*

**Physics**

If the angle decreases what will happen to the tension? Please explain why.
*February 24, 2012 by Anonymous*

**Physics**

could you explain friction in a very easy term please
*April 23, 2014 by Olumide Adesiyan*

**Science- Chemistry**

Could someone please explain a few things? First off, how do you change a normal compound or element and change it to an ion? And second, could you please explain the net ionic equations?
*February 11, 2009 by Mme. Bella*

**Math Help**

could someone please give me an example not an example using coins, marbles, spinner, like something different that would explain the difference b/w theoretical and experimental probability. And please explain.
*March 20, 2014 by Annie*

**math 012 please help explain**

can someone please help explain how to do this problem. i have a previous posting where i tried to work the problem out, and someone tried to explain where i was confused, but im still confused. 4(2n+1)=3(6n+3)+1
*February 1, 2009 by amy*

**Physics please explain**

Can you please explain your answer. How did you get blue lamda. Is it because red and green makes blue? How do I find the value of blue lambda? A mixture of red light (vacuum = 661 nm) and green light (vacuum = 551 nm) shines perpendicularly on a soap film (n = 1.35) that has ...
*November 14, 2007 by Mary*

**Physics**

How do you calculate error analysis? For example; 200 +- 5% Please explain if possible
*June 13, 2010 by 3i*

**physics**

density= mass/volume=150kg/(30*20*500) in kg/cm^3 what is kg/cm^3 and can you explain how to use this please
*January 9, 2011 by izzy*

**PHYSICS**

Can someone please explain friction. i don't even understand the concepts parts!
*January 20, 2011 by Jeanna*

**physics**

what is the strength of the electric field at (x,y)=(3.0m, 3.0m)? where v=(120x^2-290y^2)V, where x and y are in meters. Please explain. thanks
*February 6, 2013 by senko*

**Physics**

PLEASE HELP!! The x and y cooridinates of an object are given by x(t) = 10t + 5t^2 + 3t^3 y(t) = 20t - 10t^2 + 2t^3 where x and y are in meters and t is in seconds. How fast is the object traveling at t = 1 s? Please explain in detail how to do this problem. Thanks
*September 14, 2010 by Indira*

**Physics**

Runners in the 100-m dash use starting blocks. Explain what this device does. PLEASE HELP.
*October 15, 2009 by Shane*

**Physics**

Find the length of a simple pendulum that completes 16.0 oscillations in 52.0 s. CAN YOU PLEASE EXPLAIN SPECIFICALLY , THANK YOU!
*January 24, 2013 by Mike*

**physics- **

In a string and pulley problem, will friction increase or decrease the tension.can you please explain if you can?
*December 1, 2013 by Tristan*

**Science**

I REALLY REALLY NEED HELP SO 1.I need to do an essay asking you (me)to explain what is the difference between erosion,transport,and deposition?... 2.another essay asking me to explain you (me) to explain the destructive and positive effects of a volcanic erupyion?... 3.a short...
*June 14, 2014 by Alia*

**physics**

Rubidium forms the postive Rb+ Is this ion larger or smaller then the neutral atom? Explain PLEASE
*October 11, 2009 by trey*

**physics**

Wrap a cotton wool around a thermometre,will its temperature rise? Explain your answer please
*July 17, 2011 by Gift*

**Physics**

can you please help me in telling me the uses of each electromagnet wave? like explain each briefly and what are they used for? thankyou
*August 25, 2012 by wave*

**Physics (fix)**

In a string and pulley problem, will friction increase or decrease the tension.can you please explain if you can?
*December 2, 2013 by Tristan*

**physics**

Liquids exert pressure at Right Angles to the surface of container.Please explain this with an example
*August 19, 2014 by manavi*

**7th grade science bobpursley or Ms. sue please**

Can you guys help me please? I have no idea what these answers are. Thanks! 1. Explain in detail one of the climate change cause-and effect relationships. 2. Explain why a new moon is not visible and the difference between the waxing and waning phases of the moon.
*October 23, 2012 by Delilah*

**Math ; please please help.**

1. Explain in detail how to determine the value of the independent variable in a quadratic relation if the value of the dependent variable is known. Please check my answer - You would substitute the value for the dependent variable, then you would solve for the independent ...
*April 9, 2008 by Amanda*

**HELP Please. Geography.**

I found some links for the geological history for the appalachian mountains BUT it confuses me. Can you please simplify the formation of the Appalachian mountains?? please? thanks. Basically the mountains were created due to the merging of the continents into Pangea. I know ...
*April 23, 2007 by Sasha*

**PHYSICS. HELP.**

A motorboat heads due west at 10 m/s. The river has a current that travels south at 6 m/s. a) what is the resultant velocity? b) If the river is 200 m wide, how long doe sit take the boat to cross the river? c) How far downstream is the boat when it reaches the other side? ...
*November 4, 2008 by Kiley*

**Physics**

the relationship between linear speed and net force is inverse right? can someone explain why to me please.
*January 31, 2011 by Mary Sue*

**math help please...**

1.You want to use the interval method to solve a rational inequality. Explain how to find the intervals. 2.Explain how the interval method works. 3.Explain in your own words what a reciprocal function is.
*January 6, 2014 by steven*

**4th grade Math Help**

1. explain why you would use front end estimation. Give an example of one time you might use it? 2. Explain in words how to add 352 + 958. Make sure to explain regrouping, if necessary? Please help! Thank you in advance.
*September 28, 2011 by Kevin*

**Physics-Please check**

I posted this question this morning but I'm not sure of the response Damon provided. If you were in a rotor style ride and the riders accelerate until the speed of ride is reached- if the radius of the cylinder is 5.0m and the coefficient of friction between clothes and wall ...
*December 7, 2010 by Joey*

**Official meaning**

What is an official? A person who holds an office. Could you please explain more to me? What is a governor? An appointed or elected official who governs a state, colony, or province for a specific term. Could you please explain more.
*May 6, 2011 by Anonymous*

**Physics**

r vector=(340m, 39 degrees below positive x-axis) What is rx and ry? I have no idea how to do or approach this problem, anyone please help and explain how to do this? Thank you!
*September 12, 2011 by Sher*

**Physics**

Which object has a greater momentum, a stationary tractor-trailer or a tossed tennis ball? Explain your answer please.
*March 7, 2012 by Jack Binns*

**physics**

Calculate the time required for an astronaut to free-fall 50 m on the Moon. Please show and explain steps answer is 7.9s
*July 8, 2013 by jake*

**math**

can someone please answer these questions for me?: 1. if the measure of an interior angle of a regular pentagonis 108 degrees, then the angle sum of that regular pentagon must be: A. 120 degrees B. 360 degrees C. 540 degrees D. 720 degrees 2. is it possible for a parallelogram...
*December 12, 2010 by Brianna*

**Science**

explain how a zygote could end up with an extra chromosome please help my book does not explain
*February 24, 2009 by Gaby*

**ALGEBRA**

please help me explain this in 50 words.. Explain why the equation -6(x + 3) = -6x + 5 has no solution and 7x +18 + 8x = 8(x + 4) + 7x – 14 has infinitely many solutions.
*March 8, 2010 by SAMANTHA*

**Algebra, explain how to please**

Can someone explain to me how to solve -14=2/5(9-2b) It would be greatly appreciated thank you
*October 17, 2010 by June*

**chemistry**

How can i explain the electron configuration for silcon. I Know it's [Ne].3s2.3p2 but how do i explain it. Si has 14 electrons. The fill by low energy level to higher is 1s2, 2s2, 2p6, 3s2, 3p2 I don't know what else there is to explain. If this isn't the answer you are ...
*November 11, 2006 by Bryan*

**science**

can a solution be made by mixing a solid,liquid,and a gas?Explain. please explain
*October 15, 2009 by Anonymous*

**Algebra, explain?**

So I have to solve this problem 9a=6(a+4) And then I wrote down: 9a=6a+24 but I don't know what to do from there, can someone explain to me please?
*October 18, 2010 by Allyson*

**math**

Explain how to find the restrictions on the domain of a reciprocal function. (please explain it clearly) thank you!
*November 29, 2013 by Paran*

**Economics**

Can someone please explain what factors affect a country GDP? Also, if Thailand has a GDP of 4.5% and Australia has a GDP of 2.8%, please explain which country has a better economy. Thanks for your help
*September 8, 2007 by Nat*

**programming**

Explain the term "dynamic memory allocation" in C++? Please explain it in such a way i will understand it
*April 23, 2014 by Olumide Adesiyan*

**Physics HELP!!!**

A ball is kicked at an angle of 50 with a velocity of 14m/s. a. how long is it in the air? b. how high does it rise? can someone please explain to me how to solve this???
*October 21, 2008 by Lauren*

**PHYSICS PLEASE HELP!**

Two nitrogen atoms are seperated by 4 cm. Each atom has 2 extra electrons. What is the force between them? is it attractive or repulsive? Explain.
*January 20, 2013 by Anonymous*

**physics **

A carton of juice remains intact even after you have sucked out all the drink from it. please explain
*September 10, 2014 by manavi*

**Physics - urgent, please help!**

10pm. I asked "Show mathematically that to produce an image that is the same size as the object in a concave mirror, the object needs to be at twice the focal length from the mirror." and bobpursley answered: "1/o + 1/o=1/f 1/2f + 1/i=1/f 1/i=1/2f i=2f M=di/do= 2f/2f= 1 check ...
*November 17, 2008 by Juniper*

**pre ap physics**

a car with amass of 1120 kg starts from rest and accelerates to the speed of 17.5 m/s in 18.8 s. assume that the force of resistance remains constant at 402.5 N during this time. what is the average power developed by the car's engine? answer in units of W can you please ...
*February 1, 2013 by keely*

**Science-Space**

Compare Earth and the moon in terms of size and surface gravity.Explain please. What is the relationship between the moon's surface gravity, lack of an atmosphere, and temperature range? Explain please!
*March 6, 2012 by Abby*

**network neutrality**

1. Explain what Net Neutrality is 2. Explain who wants and who doesn’t want Net Neutrality 3. Explain the Obama administrations stance on the issue 4. Why didn’t the FCC’s ruling cover wireless providers can you please help me find a link/websites that will help me answer ...
*February 11, 2012 by blaze*

**Physics**

"It takes a force of 109 N to lift a stone straight up. This force gives the stone an acceleration of 12 m/s^2. Calculate the mass of the stone." My physics teacher tried to explain this problem to us, but he explained it so confusingly that I still don't get it (if that made ...
*October 29, 2007 by Emily*

**Physics **

During the war in iraq, the us military was extremely successful at detecting and striking enemy targets. many news correspondants suggested the coalition forces had a spy satellite at an altitude of only a few hundred kilometers permanently positioned 34 degrees north ...
*July 17, 2011 by Capreeca*

**Math help please last question**

Solve the equation. 10. 2(4x -4) + 2(3x + 2) = 360 Can you please help me on this problem? Could you explain it please? I'm confused...
*September 27, 2013 by Charlotte*

**physics**

Explain what ideas led Bohr to suggest a new atomic model; and state Bohr postulates. Explain also, in words, what the correspondence principle is in atomic physics.
*April 19, 2011 by qwer*

**science**

what type of solution is formed when steam from boiling water evaporates into the air?Explain.please explain
*October 15, 2009 by Anonymous*

**Math **

Please explain how you got this answer as well! A shape has a perimeter of 3.00 M. Is it possible that one side's length is only 5 cm? Explain
*January 22, 2012 by I need a answer to this ASAP please help*

**algebra**

Please Explain: Simplify by removing factors of 1 1875v^10y^10/45v^4y^4 and explain exponents step if possible.
*May 24, 2012 by plz help*

**help PLEASE! URGENT!**

ok, i need help w/ this problem. (4x^3 + x^2 + 3) + (x^3 + 2x^2 +1) can u please explain how to do this please? i'm very lost. Thanx! -Ally
*August 16, 2005 by ally p.*

**AP Physics**

can you please explain this to me... Were given this eqaution x = At^2 + B were A = 2.10 m/s^2 B = 2.80 m ok and this is an example problem and it's wlking us through it find the instantaneous velocity at t=t2=5.00s equlas the slope of the tangent to the curve at point P2 ...
*June 13, 2009 by AP Physics*

**History**

Can you answers the Q's about a Notable American Explorer ? I need to know all about Sir Francis Drake Can you please tell me : The reason why he became an explorer Country he sailed for (if different from their country of origin please explain why) where was his attempted ...
*February 23, 2010 by AvatarSandS*

**Science**

Explain how gravitational, electrical and magnetic force act on a maglev train??? Please help I need to know please!!!! before tomorrow please
*December 18, 2013 by Sebastien*

**12 Biology! URGENT!**

Can anyone please explain how LH affects estrogen and progesterone? I tried searching the internet and I don't understand, so can someone EXPLAIN it to me in words? THANKS!! THANKS!
*May 13, 2008 by Kyliyok*

**calculus**

Hi! Thank you for your help! COuld you explain to me how to do this problem? I dont understand...thank you! The function f(x) = 4(x^3)+2e^(2x) is invertiable. Give the derivative of f^(-1) at x=2. If you could please explain this I would greatly appreciate it! Thank you!
*January 12, 2011 by APpreciative student*

**Physics**

I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for an automobile with ...
*October 11, 2013 by Sarah*

**Physics**

I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for an automobile with ...
*October 11, 2013 by Sarah*

**Physics**

I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for an automobile with ...
*October 11, 2013 by Sarah*

**Physics**

I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for an automobile with ...
*October 11, 2013 by Sarah*

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