Saturday

February 25, 2017
Number of results: 140,424

**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*

**physics**

Guys help with my physics please!!! Four 40-gram weights are suspended at the 13-cm 21-cm 35-cm and 74-cm marks of a uniform meter stick.if the stick is supported at the mid point what load must be suspended at the 82 cm mark to attain equilibrium please explain to me how

*August 31, 2015 by Jared*

**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*

**Calculus**

Can you please explain to me what are the qualifications for a function to be continuous? Please explain your response in easy to understand wording. thank you in advanced!

*September 22, 2015 by Catera*

**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*

**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*

**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**

A balloon appears to be yellow when seen in white light. Explain the colour it will appear in a) green light and b) magenta light. I really don't undestand the subtractive theory of light, and it applies to this question. Can you please explain to me how to get the answer? Thanks

*April 25, 2010 by Emily*

**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*

**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*

**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*

**Science**

Please explain what the authors, Hewlett, Martinez & Peters, Ted, mean when they write that the neo-Darwinian model is very fertile? Please explain one of their three examples of this fertility.

*January 2, 2015 by Anonymous*

**Science**

Please explain what the authors, (Hewlett, Martinez & Peters, Ted), mean when they write that the neo-Darwinian model is very fertile? Please explain one of their three examples of this fertility.

*January 3, 2015 by Linda*

**Math please explain!!**

A student got 80 percent problems correctly which is 32 problems correct. how many problems are they in total? I got 40 in a page but it did not explain can you PLEASE EXPLAIN!!!!

*March 28, 2016 by Jenniferlove*

**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/math**

How do you convert 50.4 mi/h to m/s? 1 mi = 1609 m. Please explain it to me because I don't get it

*September 26, 2016 by JIna*

**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**

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**

Why is the momentum in a spaceship traveling in space not conserved? Can someone please explain? thanks

*December 16, 2008 by mw*

**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**

state the precision of the measured quantities 1. 353g 2. 6.00cm please explain

*February 4, 2015 by samuel*

**Physics**

Can someone please explain how to tackle this problem? Cu - Anode electrode Zn - Cathode electrode A current of 2 amps is sustained for 16 minutes. what mass of Cu(s) is deposited on the zinc electrode? (Faradays' constant: 96500 C/mol e-) Please and thank you!!

*July 5, 2016 by Sarah*

**chemistry**

2Na + 2H2O---> 2NaOH + H2 Need to find the molecules of H2 Atomic wt o Na = 23 48.7 g of Na 48.71/23 = 2.12 mols Na 2.12/2 × 24. (WHERE DOES THE 24 COME FROM) = 25.44 dm^3 H. (PLEASE EXPLAIN THIS PART) = 1.06moles 1.06mols× 6.02×10^23 avagados number= 1.204 × 10^24 ...

*January 7, 2017 by lulu*

**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*

**physics please help**

the potential difference across a load is 9V. explain what this means in more fundamental terms.

*January 19, 2015 by Isabelle*

**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*

**English**

I am writing an essay and my directions say to choose one character from The Call of the Wild and explain how the author created him or her. Does this mean to like explain who the character is and the things they do and say? If not please explain this to me.

*October 24, 2015 by imnotsmart:(*

**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*

**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*

**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*

**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*

**Physics**

How could you use 100 pounds of force to lift a 200 pound weight? Explain precisely, listing any necessary distances and details. (This will take some converting!) I don't understand this question, could someone please help me? I think I only need the distances from the ...

*November 23, 2016 by Nathaly*

**Physics**

How could you use 100 pounds of force to lift a 200 pound weight? Explain precisely, listing any necessary distances and details. (This will take some converting!) I don't understand this question, could someone please help me? I think I only need the distances from the ...

*November 23, 2016 by Nathaly*

**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*

**Math**

Find the product and explain the process and reasoning 0.67 x 0.3 Please help I don't know how I could explain this :(

*October 7, 2016 by John*

**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*

**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*

**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 separated 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*

**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*

**English**

Please help “In any case you mustn’t confuse a single failure with a final defeat.” Use this quote for the following -Explain why the quote moves you or should inspire others. -Explain why the quote is important. -Tell the ways in which the quote is empowering. Please ...

*October 25, 2016 by Sampreet*

**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*

**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*