Wednesday

May 27, 2015

May 27, 2015

Number of results: 61,374

**mathh**

(x-1)^2 * (x+2)^3 >= 0 helpppp please!
*August 19, 2009 by chrissy*

**math Please helpppp**

evaluate r^2-3 when r=-7
*May 9, 2010 by Marie*

**helpppp**

how to go from cubic feet to liters .
*September 14, 2011 by Anonymous*

**math**

how do you come up with a equation for a line?? helpppp!!!!
*February 6, 2008 by Anonymous*

**NEEDS TO BE TURNED IN IN 5 MINUTES!! HELPPPP**

find y' if arctan(xy)=6+(x^4)y
*March 26, 2013 by Anonymous*

**Math please plaese helpppp**

how do you solve this system algebraicly a- 2/3b =4 3/5a +b=15
*May 25, 2010 by kyle*

**math helpppp !**

Solve the equation and check soultion 2(13t-15)+3(t-19)=0
*June 9, 2014 by Anonymous*

**Physics HELPPPP**

A speeder traveling at 37 m/s passes a motorcycle policeman at rest at the side of the road. The policeman accelerates at 2.62 m/s2, To the nearest tenth of a second how long does it take the policeman to catch the speeder?
*November 7, 2010 by Jsnl*

**helpppp science 7**

what role do insulators play in preventing electric shock?
*February 13, 2011 by kim*

**helpppp science 7**

what role do insulators play in preventing electric shock?
*February 13, 2011 by kim*

**HELPPPP**

A______ is something a producer can do for a consumer I have no clue please help
*January 30, 2013 by ray*

**physics helpppp!! **

The 2nd harmonic of a string of length 40cm and linear mass density 1.11g.m has the same frequency as the 5th resonance mode of a closed pipe of length 1.4m. Find the tension in the string. use 340 for speed of sound
*February 16, 2012 by joey*

**HELPPPP ! -.-**

Describe how the principle of superposition was used in determining the relative ages of the cross-sections?
*March 2, 2012 by Amanda*

**PHYSICS CAN ANYONE HELPPPP PLEASE**

A crow sits on a clothesline midway between two poles as shown. Each end of the rope makes an angle of θ = 28° below the horizontal where it connects to the pole. If the combined weight of the crow and the rope is 11.1 N, what is the tension in the rope?
*February 12, 2012 by Anonymous*

**Math helpppp!**

Write the quadratic function in standard form and sketech its graph. Identify the vertex. h(x)=(x-6)^2+3
*June 8, 2014 by Anonymous*

**Chem**

when 2.31 moles of sulfur hexafluoride are synthesized from te elements, how many grams of fluorine were used PLEASEEEEE HELPPPP MEEE!
*February 4, 2013 by Em*

**PHYSICS HELPPPP!**

When a tennis player hits .6kg tennis ball, the racket applies an average force of 250 N to the ball for a time about .15 seconds. Suppsoe that after the colliding, the 1 kg ball was measured to be moving to the left, but onl at 3.25 m/s. What would be the direction and speed ...
*August 21, 2012 by Anonymous*

**Sociology HELPPPP**

How does deviance and crime function both for and against society? Be sure to include social control in your answer group.
*February 1, 2013 by Melissa*

**history **

How was Fort William Henry massacre used by the British and the American colonists to justify brutality against the Indians? HELPPPP PLEASE
*February 6, 2012 by brittney *

**pre-calc helpppp**

Evaluate the expression under the given conditions (show steps please) sin(è/2); tan è = − 5 / 12 , è in Quadrant IV
*April 21, 2012 by John*

**helpppp**

concentrated sulfuric acid has a density of 1.84g/ml. calculate the mass in grams of 1.00 liter of this acid.
*September 20, 2011 by chm helpppp*

**algebraa 1 helpppp meee pleaseeee**

Find each percent change, and tell whether it is a percent increase or decrease. 7. From 20 to 28
*September 14, 2011 by Tranesha*

**englishhhhhhhhhhhhhh**

Graham,Judith. Happiness is Contagious:New Study Finds. Chicago Tribune: Health (4 Dec 2008) 16 Dec 2008. <chicagotribune.c o m/features/health/chi-081204happiness,0,6297377.story>. is this correct now helpppp english plzz - Anonymous, Friday, September 30, 2011 at 3:...
*September 30, 2011 by Anonymous*

**english help **

Graham,Judith. Happiness is Contagious:New Study Finds. Chicago Tribune: Health (4 Dec 2008) 16 Dec 2008. <chicagotribune.c o m/features/health/chi-081204happiness,0,6297377.story>. is this correct now helpppp english plzz - Anonymous, Friday, September 30, 2011 at 3:...
*October 1, 2011 by Anonymous*

**Helpppp**

Find the apr to the nearest half percent for the following loan Amount financed $3400 Finance charge $470 Number of monthly payments 36 Please help
*February 22, 2013 by Kate *

**helpppp**

the fernrod motorcycle company invested 250,000 at 4.5% compounded monthly to be used for the expansion of their manufacturing facilities. how much money will be aviable for the project 3.5 years?
*June 2, 2014 by math HELP!! math*

**PHYSICS HELPPPP**

A loaded ore car has a mass of 880 kg and rolls on rails with negligible friction. It starts from rest and is pulled up a mine shaft by a cable connected to a winch. The shaft is inclined at 28.0° above the horizontal. The car accelerates uniformly to a speed of 2.20 m/s in 11...
*December 5, 2008 by john*

**Physics**

A 55.0 kg diver steps off a diving board and drops straight down into the water. The water provides an upward average net force 1320 N. If the diver comes to rest 5.8 m below the water's surface, what is the total distance between the diving board and the diver's stopping ...
*November 21, 2013 by Cami*

**MATH HELPPPP!!!!!**

If the sum is zero, what is the relationship of the two numbers? (this is an integers question--adding and subtracting-multiplying-and deviding positive and negative numbers)
*November 22, 2008 by Mary*

**pre-calc helpppp**

Find sin x/2, cos x/2, and tan x/2 from the given information. (show work please) thank you!!! cos x = − 4/5, 180° < x < 270°
*April 21, 2012 by John*

**Math---helpppp**

1)Expand and simplify. Express each equation in standard form. a) f(x) = -2(x-1)(x+4)(x+1)(x-3) b) f(x) = (x+2)(x+1)(x+4) c) f(x) = x(x-6) 2) For each function in question 1. state the degree of the polynomial and identify the type of function
*April 28, 2012 by sandra*

**Chemistry....helpppp**

Predict Which among the following substances is likely to have a relatively high melting point.(more than one answer may be selected) * P4 * CaCl2 * CCl4 * AlN * CaC2 * None of the above
*August 9, 2013 by mariana*

**HELPPPP**

A car is driven at a constant speed of 77 km/h down a road. The car's engine delivers 49 kW of power. Calculate the average force that is resisting the motion of the car.
*January 4, 2011 by HELP PLEAS*

**pre-calc helpppp**

Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. ã((1-cos50)/2)
*April 21, 2012 by John*

**Chemistry Please helpppp**

Molecular Orbitals 1.Which of the following diatomic species are paramagnetic and which are diamagnetic? a.C2^2+ b.B2^2- c.Li2^- 2.Arrange the following in order of decreasing stability. a.F2 b.F2^- c.F2+ I know that as you go to higher subshells like from s -p-d-f the energy ...
*November 20, 2008 by Saira*

**SCI. HELPPPP**

hi i really really can't find this plz help mee~ Find out the exact rate of movement/increase of distance from New York to Europe THANKS~
*December 3, 2007 by Lily*

**physics helpppp**

Figure 10-35a shows a disk that can rotate about an axis at a radial distance h from the center of the disk. Figure 10-35b gives the rotational inertia I of the disk about the axis as a function of that distance h, from the center out to the edge of the disk. The scale on the ...
*April 18, 2010 by andy*

**chemistry**

HELPPPP!!!! A mixture is prepared using equal masses of the two volatile liquids benzene, C6H6, and ethanol, C2H5OH. What is the mole fraction of benzene in this mixture?
*November 7, 2013 by Bobby*

**Mrs.Sue**

mrs sue i have to go soon can u plzzzz helpppp me i just need ou to answer my questions and show ur work so i can print it and make it a study guide plz
*May 19, 2011 by charolette*

**MATH HELPPPP**

in the diagram below, <G and <H are complementary. What is the measure of G? a)20 b)30 c)40 d)50 inside G they have a problem saying (2x+10)degrees. i relly need help into solving these kind of problems trying to find degrees of each angle but i cant remember the ...
*February 27, 2012 by Kristie*

** 6th grade science acrostic **

Helpppp!!!!!!!!!!I need help on the acrostic. Can you people help? Okay, I need to do an acrostic on photosynthesis, devoured,and extinct.....Thank you if you help.....Rlyyyyyy THANKS
*August 16, 2010 by Abby*

**Chemistry helpppp!!!! **

How to calculate the ratio of diffusion of Br2 molecules to that CI2 molecules at the same temp. The rate of diffusion is 0.67 So how would I get the ratio??? Steps please and answer! Thank you for your help!!
*June 2, 2010 by A*

**physics helpppp**

particle 1 of mass m1 = 0.29 kg slides rightward along an x axis on a frictionless floor with a speed of 1.8 m/s. When it reaches x = 0, it undergoes a one-dimensional elastic collision with stationary particle 2 of mass m2 = 0.40 kg. When particle 2 then reaches a wall at xw...
*March 30, 2010 by Anonymous*

**Chem! Please helpppp!!!!! **

Consider the evaporation of methanol at 25.0 c: CH3OH(l)-- CH3OH(g) I figured out that Delta G is 4.3 kJ. Find the Delta G at 25 C under the following conditions: Pressure of CH3OH= 157mmHg, 103mmHg, 14mmHg thanks! please explain
*November 11, 2010 by JP*

**algebra**

Please Helpppp!!! Mother having a hard time with radicals. A playground is shaped like a rectangle with a width 5 times its length (l). What is a simplified expression for the distance between opposite corners of the playground? Please can you post step-by-step so I understand...
*March 26, 2013 by Kristine*

** math**

franklin school has 3 boys for every 4 girls in the fifth grade.there is 140 students in the fifth grade. A. how many are boys and how many are girls??? pleassseee helpppp meeeeee!!!!
*February 2, 2013 by wobble it*

**maath HELPPPP**

a ball is thrown into the air at a speed of 96 feet/sec. The equation that expresses the height of the ball as a function of time is: h(t) = -16t2 + 96t + 5 How long does the ball stay in the air after it is thrown? (Round answer to the hundreths of a second)
*February 14, 2013 by Erin *

**calculus helpppp!**

a 20m ladder rests vertically against the side of a barn. a pig that has been hitched to the ladder starts to pull the base of the ladder away from the wall at a constant rate of 40 cm per second. find the rate of change of the height of the top of the ladder after 30 secs
*December 8, 2008 by chris*

**MATHHH HELPPPP**

3b+7=-2 14+h/5=2 h/5=fraction m/8+4=16 m/8=fraction 3x-1=8 35=3+5x -3+m/3=12 m/3=fraction -x-4=-20 5=-z-3
*October 11, 2011 by KATIE*

**Computer Science (java1)**

can someone please tell me the equation for compshift? double Angle = 45.0; double AngleRadians; double ComptonShift ; //calculations AngleRadians = Math.toRadians(Angle); ComptonShift = Helpppp here
*March 14, 2012 by Nick*

**Algebra 2**

It takes you 3 hours to mow a lawn & it takes your sister 2 hours to mow the same lawn. How long does it take the two of you to mow 12 lawns if you work together? Whats the answer? Helpppp
*August 24, 2014 by Michael*

**Pre-Calc**

A large painting in the style of Rubens is 3 feet longer than it is wide. If the wooden frame is 18 in wide and the area of the picture frame is 286 ft^2, find the dimensions of the painting. I have the basic idea down of what I'm supposed to do to solve it.. But I just can't...
*October 16, 2011 by Wooah*

**Health 8R help!!!!!!!!!!!!!!!!!!!!!!!!!**

Place the letter of the correct reaction (A, B, C, D, or E) A. Speed up brain messages (Stimulants) B. Slow down brain messages (Depressants) C. Block pain messages (Narcotics) D. Scramble or confuse brain messages (Hallucinogens) E. Destroy brain cells (Inhalants) LSD...
*November 15, 2012 by Laruen *

**chemistry PLEASE HELPPPP**

10.0 grams of carbon dioxide and 20.0 grams of oxygen are mixed in a 50.0 L container at 30.0 degrees celcius. What is the pressure of this mixture in mm Hg? I defined my variables. so i had Mass=30.0g Volume=50.0L Temperature=303 Kelvin pressure=x. then i used PV*GFM=mRT. (x...
*March 18, 2008 by Miley*

**math**

Lareina understands factors, but sometimes she has trouble finding all the factors of a number. What advice would you give to help her find all the factors of a number? Demonstrate by finding all the factors of 110. I NEED HELPPPP!!!!!!!!!!!!!!!!!!!!!!!!!!
*January 31, 2012 by Gabby ( 5 grade)*

**mathh**

the average of a set of six integers is 38. when a seventh number is included in the set, the average of the set increase to 47. what is the seventh number? helpppp
*February 5, 2013 by Oscar*

*****CHEMISTRY HELPPPP!!!!**

(b) The density of platinum is 23.4 g/cm3 at 20°C. Calculate the mass of 77.0 cm3 of platinum at this temperature. (c) The density of magnesium is 1.74 g/cm3 at 20°C. What is the volume of 275 g of this metal at this temperature? *what I am stuck on the most is that the answer...
*August 8, 2013 by Anon.*

**help help helpppp--math**

1)Use the definitions sin0(theta) = y/r, cos0(theta) = x/r and/or tan0(theta) = y/x to prove that cot0(theta) = 1/tan0(theta) 2)For all 0(theta) prove: a)cos(t) = 1/sec0(theta) b. sec(t) = 1/cos0(theta)
*April 30, 2012 by abeer*

**Physics Helpppp**

Q11 a(ii)A sinusoidal carrier wave has frequency 500 kHz and amplitude 6.0 V. It is to be frequency modulated by a sinusoidal wave of frequency 8 kHz and amplitude 1.5 V. The frequency deviation of the carrier wave is 20 kHz V^1 Describe, for the carrier wave, the variation (...
*May 2, 2015 by Ariana*

**HELPPPP!!!!**

One car traveling at 55mi/h left a certai place 3h later than another car. The second car was traveling in the same direction at 40 mi/h. Inhow many hours ill the faster car ovrtae the other? My work: 55(t-3) = 40t] 55t-165 = 40t -55t -55t -165 = -15t /-15 /-15 11 = t 9 = t-3 ...
*October 7, 2009 by Claudizzle*

**HELPPPP**

What is relative humidity? What is Absolute humidity? What is Specific humidity? But can you give me an answer a paragraph long each thanks a lot! Or just answer 1 or 2 of my questions I will take any answer!! P.S- Thank you so much for your help!! Stepanie -- we Jiskha tutors...
*January 8, 2007 by Stephanie*

**HELPPPP**

A box contains 2 white marbles, 3 blue marbles, 7 black marbles and 9 green marbles. Juan takes one marble at time out of the box and without looking at its color puts it in another box. What is the least number of marbles Juan must transfer to the second box to be certain ...
*February 23, 2014 by nisrin*

**history**

Ok i am having trouble with my world history homework questions........Please HELPPPP!!!!!!!!!!!!!!!!!? Ok these are the three questions i am having trouble with: 1. What are some of te characteristics of the "Renaissance man" and "Renaissance woman"? 2. How did Italy's cities...
*January 28, 2009 by chris*

**Math HELPPPP**

(a) Which of the following are examples of the expression "difference of two cubes"? (Select all that apply.) (y2 - 9)3 3 - 4y 64 - y3 (y - 1)3 y3 - 27 27 - 3y y3 (b) Which of the following are examples of the expression "cube of a difference"? (Select all that apply.) 27 - 3y...
*September 28, 2012 by Mark*

**Math Helpppp**

The College Board, which are administered each year to many thousands of high school students, are scored so as to yield a mean of 550 and a standard deviation of 100. these scores are close to being normally distributed. what percentage of the scores can be expected to ...
*February 23, 2013 by Katy*

**Helpppp Math!!!**

The market value (in thousands of dollars)of a certain home is a linear function of t, the time in years since 1990. In 1992 the market value was 68 thousand dollars, while in 1997 the market value was 79 thousand dollars -Find the slope of V as a linear function of t. Explain...
*April 29, 2014 by Kim*

**Maths Vector Helpppp**

The points A and B have position vectors, relative to the origin O, given by −−→OA = i+2j+3k and −−→OB = 2i+j+3k. The line l has vector equation r = (1−2t)i+ (5+t)j+ (2−t)k. (i) Show that l does not intersect the line passing ...
*January 19, 2015 by Ariana*

**trig help**

I need help finding sinA if cosA=(-3/5) and A is greater than 90 degrees, but less than 180 degrees. Draw the quadrant diagram. In the upper left quadrant, greater then ninety degrees, but less than 180, cosine is neg, and sine is positive. Draw a three, four, five right ...
*May 6, 2007 by Cory*

**CHEMISTRY HELPPPP!!!!!!!!!**

Consider the decomposition of NH3 (g). 2 NH3 (g) → N2 (g) + 3 H2 (g) The reaction is catalyzed on a surface of either tungsten or osmium. The activation energies for the catalyzed and uncatalyzed reactions are given below. W Ea = 163 kJ/mol Os Ea = 197 kJ/mol No catalyst...
*March 11, 2015 by anon*

**PHYSICSSSSS helpppp please**

Two boxes with different masses M1 = 1.8 kg and M2 = 2.6 kg are tied together on a frictionless ramp surface which makes an angle θ = 21° with the horizontal (see the figure below). What is the tension in the rope connecting the two boxes? N What is the tension in the ...
*February 12, 2012 by Anonymous*

**Accounting HELPPPP**

Jim Johnson has 40% interest in Richards and Johnson, LLP. The partnership has the following activity for the year: Sales $180,000 Cost of Goods Sold 105,000 Guaranteed Payment to Ron Richards 25,000 Depreciation 11,000 Interest Expense 1,000 Tax-Exempt Income 1,500 Health ...
*April 18, 2012 by Aby *

**mathhhh helpppp!**

can someone please help me set up inequalities based on the info below?: jayanta is working to raise money for the homeless by sending information letters and making follow-up calls to local labor organizations and church gorups. She discovered that each church group requires ...
*October 15, 2009 by chrissy*

**Chemistry**

Unknown Acid: #2 Mass of Unknown solid acid transferred:0.414g Volume of volumetric flask: 100.00 mL Concentration of NaOH: 0.0989 M Aliqot of acid titrated with NaOH: 25.00 mL Average volume of Naoh from titration: 13.9 mL Here's where I need help: No of moles NaOH used: ? ...
*October 10, 2010 by Rayana*

**Chemistry**

Expt #1- Molecular Weight of Unknown Acid Unknown Acid: #2 Mass of Unknown solid acid transferred:0.414g Volume of volumetric flask: 100.00 mL Concentration of NaOH: 0.0989 M Aliqot of acid titrated with NaOH: 25.00 mL Average volume of Naoh from titration: 13.9 mL Here's ...
*October 10, 2010 by Rayana*

**chemistry**

HELPPPP!!!! This is a lab, and i need help with the equations please!! Thank you !! Heat of fusion data table : Mass of foam cup = 3.57g Mass of foam cup + warm water = 104.58g Mass of foam cup + warm water + melted ice = 129.1g Temperature of warm water = 37 degrees celcius. ...
*December 2, 2012 by maryam*

**physics**

what is physics?i know that its subject but what is defination of physics? The study of matter, energy, space, and time, and the interactions thereof.
*July 7, 2007 by komal*

**physics/medical physics**

please assist me to get project topic under biophysics or application of physics in medecine
*August 12, 2009 by mataos*

**11th grade physics**

my physics teacher asked the class to find a cool physics topic and write a summary and a reflection on it 1page.... any ideas im really stuck
*October 5, 2008 by JESSICA!!!!!!!!!!!!!!!!!*

**Physics**

Could someone help me to say this better? I have to Distinguish between atomic physics and nuclear physics, so here is what i have. which deals with the atom as a system of electron(s) and a nucleus and nuclear physics, which considers atomic nuclei alone
*November 10, 2007 by Amanda*

**Physics;Help!!!!!!**

There is apparently no one online who can help with physics questions right now. Please check back later to see if a physics teacher has addressed your question. Multiple posts won't get faster answers. Thanks. =) The question is in the first question marked physics beside ...
*June 7, 2007 by Writeacher*

**physics**

thanks for the help earlier just got a question I'm taking AP Physics B this year does that mean next year I would Take AP Physics C??? I don't know if the material in C convers the same material plus the additional calculus material or what??? Could I take AP Calculus while ...
*August 9, 2009 by physics*

** HELPPPP NOOWW !!!!!**

Type the pronoun that correctly completes the sentence. Remember that you must spell your answer correctly to receive credit. Yes, the one who designed the house was (she, her). (Points : 1) Question 2. 2. Type the pronoun that correctly completes the sentence. Remember that ...
*March 4, 2014 by kaila flowers*

**how come no one is helping on physics questions!!!**

every physics helpers are not getting any responses. can someone help on physics questions pleases???
*October 28, 2010 by Lyn*

**physics**

just wondering if anybody have any suggestions for a physics project (anything that deals with physics)??? thanks Research the Klien-Fogleman wing and its advantages over conventional wing shapes.
*November 27, 2006 by mitch*

**college physics**

This site is just a front for liveperson Most college physics questions are not answered for months if ever. Out of "200 experts" you must have somebody who knows physics right? Guess not.
*September 30, 2009 by john*

**Physics and movies**

we are supposed to relate physics to movies, and state mistakes or errors found in the movies based on physics principles. I am trying to do Willy Wonka the 1971 version...I need help trying to prove that Violets becoming a blueberry is impossible and an error due to physics, ...
*December 8, 2007 by Please McHelp me!*

**URGENT Needs Physics Help**

Ok, so I am doing this paper on the physics mistakes in Willy Wonka and the Chocolate factory. To prove that the everlasting gobstopper defies the laws of physics, I wanted to use Zeno's paradoxes to do so. But are his paradoxes correct? There are theories online that say they...
*December 16, 2007 by Desperate*

**Urgent Needs Physics Help**

Ok, so I am doing this paper on the physics mistakes in Willy Wonka and the Chocolate factory. To prove that the everlasting gobstopper defies the laws of physics, I wanted to use Zeno's paradoxes to do so. But are his paradoxes correct? There are theories online that say they...
*December 16, 2007 by Desperate--REPOST*

**Physics Find mass and radius of planet.**

While visiting Planet Physics, you toss a rock straight up at 15 m/s and catch it 2.4 s later. While you visit the surface, your cruise ship orbits at an altitude equal to the planet's radius every 240 min. What is the mass of Planet Physics? What is the radius of Planet Physics?
*April 5, 2010 by Mike*

**Physics**

I posted this earlier and no one responded so I am going to try again. I have to Distinguish between atomic physics and nuclear physics, so here is what i have. which deals with the atom as a system of electron(s) and a nucleus and nuclear phys
*November 13, 2007 by Amanda*

**physics **

A physics student drops a physics text book into a mine shaft 250m deep,where the average mine temperature is 5degrees celsius.Show that the sound of the book striking the bottom is heard after 7.82seconds
*April 21, 2012 by musuma*

**AP physics**

do you guys have an someone that good with advanced physics, because i have a few problems that i am not sure how to do and its for my AP physics class, and I wasnt sure if you had someone on board now that could help thanks
*January 27, 2008 by Kristen*

**Physics**

So... The task is to evaluate the design of three types of car tires, and explain how each type differs to maximize performance. Physics terminology is to be included in our report. -------- I just need a starting point. What types of tires do you recommend I research and what...
*February 16, 2008 by Lucy*

**Physics**

Ok so I am not so bad at physics but I find it hard to understand formular like how to use this one mu *m*g= I know its somewhat related to friction but what is teh mu stand for and g too IF someone could plzz translate these symbols to words I would really appreciat it Sorry ...
*October 17, 2010 by Pablo*

**Physics - The Branches of Physics**

Give at least one example of an application of each branch: Motion -cellphone Properties of Materials Sound -Radios Light -Candle Electricity -Calculator Magnetism -VCR's Properties of atoms -Computers Nuclear physics -? Could you check to see if Ive done this right? And I ...
*September 9, 2011 by Anonymous*

**physics**

i need a topic for an eei (extended experimental investigation). i want a simple experiment that i can do. however, i need one that has a lot of physics behind it, and has a lot of information on the net about it. it can be on any topic within physics. if anyone has any great ...
*May 19, 2007 by shamstar*

**physics**

1.Distinguish between atomic physics and nuclear physics? 2.Briefly describe the Bohr model of the atom. What is Bohrs key idea (involving matter waves) that makes the Bohr atom have discrete energy levels? I really didnt understand what they were wanting, so many of ...
*November 6, 2007 by Will*

**Physics (Final Review)**

Ok so tomorrow is my Physics final and I have so much depending on this one test ( all my other grades are 80 and above but this one is a low 70). I have studied for the final but if anyone could supply me with a list of most know formulas for physics I would really appreciate...
*December 13, 2010 by Pablo*

**physics**

Stuck in the middle of a frozen pond with only your physics book, you decide to put physics in action and throw the 6-kg book. If your mass is 54 kg and you throw the book at 14 m/s, how fast do you then slide across the ice? (Assume the absence of friction. Let the direction ...
*February 22, 2011 by Anonymous*

**Physics**

Stuck in the middle of a frozen pond with only your physics book, you decide to put physics in action and throw the 9-kg book. If your mass is 45 kg and you throw the book at 10 m/s, how fast do you then slide across the ice? (Assume the absence of friction. Let the direction ...
*June 5, 2012 by James*