Friday

December 9, 2016
Number of results: 105,637

**help help 9 physics) i need an aswer fast!**

a 0.5 m^2 solar collector radiation from the sun and focuses it on 250g of water that is inially at 23 degrees . the average intensity of radiation arriving from the sun at this location is 550 Wm^-2. if you assume that this is collected with 100% efficiency. how much time is ...

*April 28, 2011 by H.T*

**math**

need an aswer quich ok thiers two the find sin(2pi/3 -pi/4) using sum and difference identites and then tan 5pi/12 using the same identites

*August 3, 2009 by robert*

**Math**

Simplify the following equation (-2)(-2)= I believe the aswer is -4

*October 7, 2008 by Jackie*

**math**

why is x+2 different from 2x? My aswer: doesn't both of them mean the same thing. If x was 5 x+2=7 2x=10

*December 10, 2006 by Jasmine20*

**Calculus**

Sir i need help in two questions, i am stuck ! 1) Calculate the population within a 7mile radius if the radialpopulation density is 6(3+r^2)^1/3 ? Use decimal notation and aswer should be in million. 2) Find the volume of solid obtained by rotating the region enclosed by y=x^2...

*September 12, 2016 by Asfand*

**HELP ME PLEASE & FAST!!!!!!!!!**

Hi, I need help. Does desertification come from Ancient China or Ancient Africa? Please I really need the help fast. Thanks so much!

*June 4, 2015 by MusicLover14*

**math**

i need to learn my multiplication tables at least up to 9 and i have to do it fast because i'm in 8th grade and i don't know what they are. how do i learn them fast??

*December 29, 2011 by jordyn*

**math**

i need to learn my multiplication tables at least up to 9 and i have to do it fast because i'm in 8th grade and i don't know what they are. how do i learn them fast??

*December 29, 2011 by jordyn*

**Algebra**

Add and subtract the rational expressions as indicated. Be sure to express your answer in simplest form ((9)/(7x)) + ((1)/(2y)) -1 I got an aswer of (16y)/(7x+2y+1)) but when I submit it shows me as wrong. Can anyone help, thanks

*September 28, 2010 by Alex*

**Physics**

How fast does a rocket need to be going to break free of Earth's gravity? How fast would it have to be going in order to completely leave the solar system? (For the second part of this problem, assume that the Sun is the only mass in the solar system and that the rocket is ...

*September 29, 2011 by Kaitlyn*

**Physics**

How fast does a rocket need to be going to break free of Earth's gravity? How fast would it have to be going in order to completely leave the solar system? (For the second part of this problem, assume that the Sun is the only mass in the solar system and that the rocket is ...

*September 30, 2011 by Kaitlyn*

**PHYSICS**

How fast is 65 mph in meters per seconds? (i just need the answer) thanks very much

*October 17, 2010 by *Krista (its just a simple question on converting)*

**Bussiness**

I am reasearching Fast Food companies in Australia. I need to know the amount of homegrown fast food companies in Australia and international fast food companies in australia. Please help, Thanks, Radella

*April 18, 2008 by Radella*

**literature..**

in the crucible act 4, which reason does herrick give for drinking? a. it keeps him warm b. he is upset about the hangings c. he is thirsty d. he is afraid he will be condemned. am confused between a nd b ... plz aswer me nd briefly explain ur answer..

*June 10, 2011 by Anonymous*

**college physics**

How fast (in rpm) must a centrifuge rotate if a particle 9.50 cm from the axis of rotation is to experience an acceleration of 113000 g's? Need help please.

*May 3, 2010 by peyton*

**Physics help **

How fast would you need to be travelling relative to an observer in order for them to see a 15% increase in your mass? How do I rearrange the formula to solve for v m = n/sqrt(1-(v^2)/c^2))

*May 31, 2016 by Ryback*

**algebra**

I just want to see if my answer for this problem is correct or not. The aswer I have is 3x^2-3/7x^3-3x^2-17x+6. I was just wondering.Can I factor my answer? 3x-3/7x-3*x+1/x^2-1

*August 31, 2010 by kim*

**geography**

What river flows just south of Cincinnati, Ohio? My Dad has a very good map and my aswer is-- The Ohio river. Is that correct?

*September 23, 2010 by Reed*

**English**

Which sentence used an adverb to answer the question “where”? A. When in a hurry, Maggie walks rapidly B. Mary left Davenport yesterday. C. Dwayne searches the want ads daily. D. John said, “I’ve decide that I’m going away.” I think the aswer is "D"

*December 11, 2012 by Sandia*

**Biology: Genetics**

18.Which of these is true of meiosis? A. n → 2n B. n → n C. 2n → n D. 2n → 2n Is C. the right aswer?

*August 13, 2014 by Anonymous*

**PHYSICS**

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #3: A 30 kg kid on rollerskates is being pushed by his mom with a force of 10 ...

*March 7, 2013 by Anna *

**physics**

rollercoaste starts at 12m high with a v of 1.2m/s and climbs to 9.0m Assume the track is frictionless... a) how fast is it going when it reaches the low pointbetween the crestss. b)how fast is it going at the top of the secondcrest (9.0m) i have no idea which eq. to use..

*February 17, 2008 by helppppp*

**algebra**

need helo solving this Equate y=-4 to y=mx+b. What is the value for m so that these equations are equivalent I need a fast response on how to solve this problem can someone help please?

*March 30, 2012 by misty*

**physics**

A car starting at x = 49 m accelerates from rest at a constant rate of 8.0 m/s2. (a) How fast is it going after 10 s? (b) How far has it gone (from x = 0) after 10 s? (c) What is its average velocity for the interval 0 t 10 s? NEED HELP!!!

*August 27, 2012 by Lulu*

**physics**

Harry says acceleration is how fast you go. Carol says acceleration is how fast you get fast. They look to you for confirmation. Who is correct? 1. Neither is correct. 2. Harry is correct. 3. They are both correct in different as- pects. 4. Carol is correct. 5. It cannot be ...

*September 24, 2011 by PHYSICS!!!*

**Calculus Related Rates**

A balloon, 50 feet from an observer, is rising at 20 ft/sec. At 5 seconds after lift off 1. How fast is the distance between the observer and the balloon changing? 2. How fast is the angle of elevation changing? I need help on both questions. Thanks in advance smart people!!

*March 14, 2016 by Sally*

**math**

if the area of a rectangle is 30 square centimeters and the length is 6 centimeters,use the equation 30=6w to find the width w of the rectangle.I don't understand what would be the correct answer I think my aswer doesn't look correct.

*September 27, 2010 by philena*

**physics**

You are watching an archery tournament when you start wondering how fast an arrow is shot from the bow. Remembering your physics, you ask one of the archers to shoot an arrow parallel to the ground. You find the arrow stuck in the ground 50.0 m away, making a 2.00degrees angle...

*October 20, 2010 by sagi*

**physics**

Two neutron stars are seperated by a distance of 10^14 m. They each have a mass of 10^30 kg and a radius of 10^5 m. They are initiall at rest with respect to each other. How fast are they moving when their seperation has decreased to one-half its initial value? How fast are ...

*March 16, 2008 by kristen*

**Physics**

1. if a 0.05kg coin is hanging from 22m above the ground: a. If you drop it, how fast will the coin be moving halfway to the ground? b. How fast will it be moving just before it hits the ground? If you could point me the right direction with equations that would be great. I ...

*June 28, 2011 by Tina*

**physics**

You are watching an archery tournament when you start wondering how fast an arrow is shot from the bow. Remembering your physics, you ask one of the archers to shoot an arrow parallel to the ground. Unfortunately the archer stands on an elevated platform of unknown height. ...

*November 16, 2010 by bobjahng2*

**physics**

You are watching an archery tournament when you start wondering how fast an arrow is shot from the bow. Remembering your physics, you ask one of the archers to shoot an arrow parallel to the ground. Unfortunately the archer stands on an elevated platform of unknown height. ...

*November 17, 2010 by alejandrob*

**Physics Ap**

A flower pot falls from a windsill 30 meters above the sidewalk. How fast is it going when it hits the ground? How long does it take to reach the ground? How fast would it be going if it was thrown down at 8m/s instead?

*September 8, 2016 by Jake*

**physics**

A race car accelerates from rest at 5.7m/s squared. how fast will it be going at the end of that time? i need the abc method...( a-all variables, unknown 1st...b-right formula and algebraically rearrange it..c- solve it0

*October 20, 2009 by c*

**Pre-Calc ... need help fast**

I need help writing an equation for a Sine Wave... I have 3 coordinates, but I can't get the eq. right... (4, 25), (7, 83), (10, 25). If anyone can help, I will be more than grategull. My group bailed on me. \m/ 25 is the lowpoint and 83 is the high point. Thanks to anyone who...

*December 6, 2006 by Anna*

**physics**

While racing on a flat track, a car rounds a curve of 56 m radius and instantaneously experiences a centripetal acceleration of 36 m/s2. How fast was the car going? I know the answer i s45 I just need to know why ASAP!!!!!!!!!!!!!!!!!!!!

*January 12, 2012 by Katelynn S*

**Calc**

A balloon, 50 feet from an observer is rising at 20 ft/sec. At 5 sec after lift off, a)how fast is the distance between the observer and the balloon changing? b)How fast is the angle of elevation changing. I just need to know what formals to use. I know the first part requires...

*March 16, 2015 by Ryan kustin*

**Precalculus help fast**

a farmer has available 1032 feet of fencing and wishes to enclose a rectangular area. If x represents the width of the rectangle for what value of x is the area the largest A) 256.5 feet b) 258 feet c) 256 feet d) 257 feet please show work! i need help fast

*March 29, 2010 by Arielt*

**eng- need it fast plz**

need a word that has all these letters d, l, b, a , e, e, n, b plz been stuck for a while grade 2

*October 19, 2009 by nany*

**physics**

How fast do you need to swing a 180-g ball at the end of a string in a horizontal circle of 0.6-m radius so that the string makes a 33∘ angle relative to the horizontal?

*February 9, 2015 by Nathan*

**Physics**

How fast do you need to swing a 180-g ball at the end of a string in a horizontal circle of 0.6-m radius so that the string makes a 35∘ angle relative to the horizontal?

*February 11, 2015 by Please Help*

**Physics**

How fast do you need to swing a 190-g ball at the end of a string in a horizontal circle of 0.6-m radius so that the string makes a 30 degree angle relative to the horizontal?

*February 12, 2015 by Derp*

**physics**

How fast do you need to swing a 180-g ball at the end of a string in a horizontal circle of 0.6-m radius so that the string makes a 35∘ angle relative to the horizontal?

*February 13, 2015 by Please Help*

**soical studes**

i need help unscrambling puritans social studies letters like pitunsa crchhc and that equals to puritan church. PLEASE NEED HELP FAST this is due wen.feb.16 2011

*February 14, 2011 by juliz*

**physics**

How would I find the acceleration of a car if it traveled 1.5 meters in one second? If it is accelerating at a constant rate with zero initial velocity, then use the formula X = (1/2) a t^2 and solve for the acceleration, a. X = 1.5 m, and t = 1 s. It could be not accelerating...

*September 22, 2006 by anonymous*

**science**

The Main Purpose Of The Grounding Pin In A Three-pong Plug For An Appliance Is To __? What's The Main Purpose Is? i believe the aswer is c a. boost the current flow to the appliance b. prevent short cicuits c. prevent electrical shocks

*February 28, 2009 by Jenny*

**Physics**

A car enters the freeway with a speed of 7.2 m/s south and accelerates uniformly for 4.2 km in 4.0 min. How fast (in m/s) is the car moving after this time? I only need the formula. My teacher gave us a list but did not tell the class which equation is for which. Help please.

*September 23, 2014 by Selena*

**help fast i need help with a bunsh**

5:15 and x:3 a.5 b.3 c.1

*January 15, 2016 by shynice*

**Debate**

I need help finding a good article for my essay. I need to address the issue that fast food restaurants now serve healthy alternatives, and that it can be good for ebt holders.

*March 20, 2015 by Josh*

**Math--need help fast**

If the radius of a circle is x/6, what's the diameter and circumference? Diameter = 2*r Circumference = 2*pi*r ...or... Circumference = pi*d Note: I'm using * to mean multiply. Can you now determine what you need to know with this information? Not really. I just need to know ...

*March 7, 2007 by Emily*

**Drivers Education**

Most of the time, it is safe to drive... A- a little faster than the speed limit B- about as fast as the traffic around you C- as fast as the car in front of you D- as fast as you think it is safe I think that the answer is B, but the book doesn't have any of these options so ...

*June 27, 2016 by queen b*

**Physics-Need Help fast!**

Two converging lenses, each of focal length 15.1 cm, are placed 40.2 cm apart, and an object is placed 30.0 cm in front of the first lens. Where is the final image formed? The image is located... What is the magnification of the system? M =

*August 1, 2011 by Megan*

**physics**

Assume that the pitch of a honking car horn is the F above middle C (f F= 349 Hz) and the speed of sound in air is 770 mph. How fast would a honking car need to be approaching you for you to hear a G (fG = 392) instead of an F?

*February 17, 2014 by Anonymous*

**Science **

How do these rank in momentum 1 being least and the most 5 Fast car, stopped truck, slow car, Fast baseball, Fast feather I have 1. Stopped truck

*March 28, 2012 by Mary *

**PHYSICS**

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #1: A skier with a mass of 60.0 kg is standing at the top of a snow covered ...

*March 7, 2013 by Anna *

**NEED HELP FAST!!!-SCIENCE**

wat is air??

*November 9, 2008 by Anonymous*

**I NEED HELP AND FAST!**

can anyone help me on finding slopes of a line?

*February 11, 2009 by anonymous*

**physics ( help FAST)**

Which could potentially cause you the greater injury: being tackled by a lightweight, fast moving rugby league player or being tackled by a player with double the mass but moving at half the speed? Explain your answer

*April 26, 2011 by H.T*

**Physics **

ou build a loop-the-loop in your backyard. It has a diameter of 3.10 m. a) How fast will you have to be moving at the top of the loop to avoid falling off? b)If you'll be coasting from the time you get to the bottom of the loop, how fast will you have to be going at the bottom?

*December 5, 2016 by Mary*

**Physics**

You build a loop-the-loop in your backyard. It has a diameter of 3.10 m. a) How fast will you have to be moving at the top of the loop to avoid falling off? The answer I got was 3.90 m/s. Is this correct? b)If you'll be coasting from the time you get to the bottom of the loop...

*December 3, 2016 by Susan *

**math-need fast**

solve by substitution method x^2=y^2+39 x-y=3

*February 26, 2009 by anonymous*

**Mathmatics**

i need help with my simple interest homework fast.

*March 4, 2009 by Anonymous*

**Physics**

A car drives over a hump in the road. The radius of the (circular) hump is 45m. How fast (m/s) would the car need to travel, so that the wheels just barely lose contact with the road?

*May 25, 2015 by Kaitlyn*

**physics**

You are watching an archery tournament when you start wondering how fast an arrow is shot from the bow. Remembering your physics, you ask one of the archers to shoot an arrow parallel to the ground. Unfortunately the archer stands on an elevated platform of unknown height. ...

*November 17, 2010 by michaelJ*

**PHYSICS NEED HELP FAST**

someone spinns with an angular velocity of 4.55rad/s with arms held out. his rotational inertia is 2.7kgm^2. whn the he pulls his arms in his angular velocity increases to 7.60rad/s. what is his rotary ek?

*January 27, 2011 by ricki*

**social studies**

i need help with a U.S history question, how would i describe Roanoke? its an 8th grade U.S history question i need it FAST!!!

*September 5, 2011 by sam*

**Physics**

When a rattlesnake strikes, its head accelerates from rest to a speed of 30 m/s in 0.64 s seconds. Assume for simplicity that the only moving part of the snake is its head of mass 100 g. How much (average) power does the rat- tlesnake need to accelerate its head that fast? ...

*February 27, 2011 by Mike*

**reading**

hi... i need help fast.... what is the theme in maniac magee??? please help me :(

*August 26, 2007 by ashley*

**ap physics**

When a rattlesnake strikes, its head acceler- ates from rest to a speed of 21 m/s in 0.46 s seconds. Assume for simplicity that the only moving part of the snake is its head of mass 200 g. How much (average) power does the rat- tlesnake need to accelerate its head that fast? ...

*February 25, 2011 by anna*

**PHYSICS NEED HELP FAST**

someone swings down pendulem and rescue the lady in distress by grabbing her. inelastic collision at the equallibrium point o fthe pendulem. his mass is 90kg her mass is 50kg. what is the masimum height of the oppsite legde that he. he is standing on a 10m edge

*January 27, 2011 by ricki*

**physics**

Suppose that a senior driving a Pontiac zooms out of a darkened tunnel at 39.4 m/s. She is momentarily blinded by the sunshine. When she recovers, she sees that she is fast overtaking a camper ahead in her lane moving at the slower speed of 12.9 m/s. She hits the brakes as ...

*October 11, 2012 by Anonymous*

**physics**

Suppose that a senior driving a Pontiac zooms out of a darkened tunnel at 31.0 m/s. She is momentarily blinded by the sunshine. When she recovers, she sees that she is fast overtaking a bus ahead in her lane moving at the slower speed of 15.7 m/s. She hits the brakes as fast ...

*September 17, 2013 by Sue*

**Physics**

Suppose that a woman driving a Mercedes zooms out of a darkened tunnel at 33.9 m/s. She is momentarily blinded by the sunshine. When she recovers, she sees that she is fast overtaking a bus ahead in her lane moving at the slower speed of 12.0 m/s. She hits the brakes as fast ...

*October 21, 2014 by Adub*

**Physics, HELP**

AN auto, moving too fast on a horizontal stretch of mountain road, slides off the road, falling into deep snow 43.9 meters below the road and 87.7 meters beyond the edge of the road. a. How long did the auto take to fall? b. How fast was it going when it left the road?

*December 12, 2013 by sydney*

**physics**

an auto, moving too fast on a horizontal stretch of mountain road, slides off the road, falling into deep snow 43.9 meters below the road and 87.7 meters beyond the edge of the road. a. How long did the auto take to fall? b. How fast was it going when it left the road?

*December 12, 2013 by tina*

**Physics**

When a rattlesnake strikes, its head accelerates from rest to a speed of 26 m/s in 0.3 s seconds. Assume for simplicity that the only moving part of the snake is its head of mass 100 g. How much (average) power does the rattlesnake need to accelerate its head that fast? Answer...

*December 11, 2011 by Angel*

**Physics**

When a rattlesnake strikes, its head accelerates from rest to a speed of 25 m/s in 0.44 seconds. Assume for simplicity that the only moving part of the snake is its head of mass 100 g. How much (average) power does the rattlesnake need to accelerate its head that fast? Answer ...

*February 20, 2013 by dallas*

**help fast fast**

analyze how islam spread among southeast asia trade routes

*November 25, 2015 by shynice*

**english**

I need help on analyzing the poem, "you are reading this too fast" by Ken Norris

*January 11, 2011 by Dick*

**english**

I need a newpaper report about twelth night and fast

*May 9, 2012 by Anonymous*

**math**

1/2x^2=x/4+1 how can i solve that with quadratic formula?plz i need the solution fast.

*January 28, 2013 by Riana*

**science (Need FAST FEEDBACK!!!)**

Is a density bottle the same as a pycnometer?

*October 26, 2014 by Daniel*

**I really need help!**

Hi, I really need instructions. Can someone please tell me how to make a coordinate plane and a rectangle on the plane in Microsoft Excel 2013 please? I really I need an answer soon because this is due today!!!! Please someone help fast! Thank You :/

*April 24, 2015 by MusicLover14*

**Physics **

A car is traveling at 14 m/s. How fast would the car need to go to double its kinetic energy? By what factor does the car's kinetic energy increase if its speed is doubled to 28 m/s? We only get 3 chances and I'm on my last one before I get the question wrong, help?

*August 8, 2011 by falcon306*

**algebra**

Use a proportion Fast food. If four out of five doctors prefer fast food, then at a convention of 445 doctors, how many prefer fast food?

*July 17, 2009 by Sandra*

**physics**

The string in the Figure is L = 135.0 cm long and the distance d to the fixed peg P is 94.5 cm. When the ball is released from rest in the position shown, it will swing along the dashed arc. How fast will it be going when it reaches the lowest point in its swing? How fast will...

*February 22, 2012 by Katie*

**Chemistry- need fast help! Thanks**

2 H2O (l) → 2 H2 (g) + O2 (g) What volume of water in gallons would need to be split to store the same amount of energy as found in 10.0 gallons of gasoline? (Gasoline contains 44.4 MJ/kg, or 32.0 MJ/L, and has a density of 0.72 g/mL where 1 L = 0.2641775 gal). Include ...

*November 5, 2010 by John*

**geometry**

i need help really fast on doing, a stage five 'Ice Triangle'.....or itteration .. thank's

*March 15, 2010 by Adela Montie*

**Math**

How do I convert a percent WITH a repeating decimal to a fraction?! I need fast help plz!!

*March 29, 2010 by Austin*

**MATH**

1 6x+7=25;3 2 22-5c=8;3 3 b\4-7=1;36 4 7a+4_>20;2.7 ps. the arrow is suppose to be on top of the line. 5 4y-3.12;4 6 m\3+14<33;9 I NEED THE ANSWERS PLEASE CAN ANYBODY HELP ME FAST .

*September 28, 2010 by JeSsica *

**reading**

i have a report on william clark due it 2days i need help. FAST!

*January 9, 2011 by spencer*

**health**

i also need the names of the different fast food so i can research there ingrdients. thank you

*February 1, 2011 by grade 5*

**Math (Need help FAST!)**

Determine if two ratios are equivalent Complete using < > = 5/20 [ ] 4/10 How did YOU do it?

*September 19, 2012 by Savanna*

**math **

write the function x-y=4 in explicit form. Please i need a fast answer

*May 12, 2016 by Shuki*

**Math**

write the function 6^x-y=4 in explicit form. Please i need an answer fast. thank you

*May 12, 2016 by teta *

**MR SUE ASWER THIS GEOGRAPHY QUESTION!**

In 1945, at the end of world was II Japan was in economic ruin. Today it rivals in the industrial strength of the united states. Arecent newspaper article compared the employment attitudes of north american and japaneese auto workers. The article suggested that the japanese ...

*February 14, 2008 by alyssa*

**Grade 8 Lang Arts**

The story is "Trouble With Television" It has become fashionable to think that, like fast food, fast ideas are the way to get to a fast-moving, impatient public. How does the repetition in the sentence convey the author's negative attitude toward television. I think that it ...

*December 7, 2016 by Sean*

**physics **

A projectile launched straight upward at 141 m/s. How fast is it moving at the top of its trajectory? Suppose it is launched upward at 45° above the horizontal plane. How fast is it moving at the top of its curved trajectory?

*October 31, 2013 by Jessica*

**algebra**

Fast food. If four out of five doctors prefer fast food, then at a convention of 445 doctors, how many prefer fast food? 4/5=x/445 5x=1780 x=356 please check if completed right

*July 18, 2009 by Sandra*

**Chemistry **

The reaction 2NO(g) + 2H2(g) N2(g) + 2H2O(g) goes twice as fast when the concentration of H2 is doubled but four times as fast when the concentration of NO is doubled. What is the overall reaction order? I did it like this: k[NO]^m[H2]^n 2r=[H2]^n, meaning that the order for ...

*September 23, 2015 by Jim *