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April 23, 2014

Homework Help: 11th Grade

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11th grade
a yo-yo has a mass of 0.20kg and i attached to a string 0.8m long. what isthe velocity of the yo-yo?
Tuesday, December 7, 2010 at 7:02pm

11th grade
Consider two vectors where F1 = 38 N, F2 = 58 N, and = 240o and = 25o, measured from the positive x-axis with counter-clockwise being positive. What is the magnitude of the equilibriant?
Sunday, December 5, 2010 at 4:15pm

11th grade
In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.17 x 10^6 m/s. find the central force acting on the electron as it revolves in a circular orbit of radius 5.42 x 10^-11m.
Sunday, December 5, 2010 at 3:33pm

11th grade
velocity = total distance/total time = 60 km/ 2 hrs = 30 kmh
Saturday, December 4, 2010 at 11:04pm

11th grade chemistry needs help
Indicate your subject in the "School Subject" box, so those with expertise in the area will respond to the question.
Thursday, December 2, 2010 at 5:47pm

11th grade physics needs help
Indicate your subject in the "School Subject" box, so those with expertise in the area will respond to the question.
Thursday, December 2, 2010 at 5:29pm

11th grade
Centripetal Acceleration = v^2/r = (circumference/time)^2/r = (2*pi*r/t)^2)/r = ((2*3.14*50/14.3)^2)/50 = 9.64 m/s^2
Tuesday, November 30, 2010 at 12:58am

11th grade
The ratio of H to O (2 to 1) must stay the same if the only product is H2O, regardless of the amount of H2O produced.
Tuesday, November 30, 2010 at 12:32am

11th grade
Newton's Second Law: F(or weight) = mass x acceleration. so, a = F/mass = 3.45/1.5 You do the math and don't forget the units!
Tuesday, November 30, 2010 at 12:18am

11th grade physics
a = change in velocity / change in time so.. a = 8 - 32 / 4 a = -6m/s^2
Monday, November 29, 2010 at 9:32pm

11th grade
A 625-kg racing car completes one lap in 14.3 s around a circular track with a radius of 50.0 m. The car moves at constant speed. (a) What is the acceleration of the car?
Monday, November 29, 2010 at 9:01pm

11th grade
What did the volume of water double FROM? Is the water gaseous? Is it at the same T and P as the reactants? There must be more information that goes with this question.
Monday, November 29, 2010 at 5:54pm

11th grade
If the volume of water produced during the reaction doubled, what would happen to the ratio of hydrogen to oxygen in the following equation: 2 H2+ O2 --> 2 H2O
Monday, November 29, 2010 at 4:27pm

11th grade
which ons is stronger 1)A solid cylinder of 2)A hollow cylinser of iron 3) A cylinder made up of slits of iron
Sunday, November 28, 2010 at 11:19am

11th grade
A 16.0 kg box is released on a 39.0° incline and accelerates down the incline at 0.267 m/s2. Find the friction force impeding its motion
Saturday, November 27, 2010 at 9:21pm

11th grade
accounts cash book find journal entries for. (1) discounted bill of rs .1000 at1% by bank (2) interest allowed by bank rs.5000
Monday, November 22, 2010 at 11:18pm

College Algebra
this is 11th grade highschool math. if you dont know this drop out now before you waste aany more of your parents' money
Wednesday, November 17, 2010 at 4:44pm

11th grade
The following data are weights of hummingbirds (in grams) randomly selected from a population. Which histogram best portrays this data set? (You may want to use your TI-83 to help you.)
Wednesday, November 17, 2010 at 1:16pm

11th grade
avgforce*time= mass*changevelocity This is the force the wall exerts on her, reverse the direction for her force.
Tuesday, November 16, 2010 at 4:09pm

Physics 11th grade
I have to determine the muzzle velocity of a toy gun by treating it as a horizontal projectile. What could be a possible hypothesis when a toy gun is shot 5 meters away from the bucket and the ball which was loaded in it is supposed to fall in?
Wednesday, November 10, 2010 at 12:01am

11th grade
An 88g arrow shot with Force=110N. Distance traveled is 78cm. What is speed of arrow?
Monday, November 8, 2010 at 5:29pm

11th grade physics
how high above the surface of the Earth would an object need to be for its weight to be half its weight on the surface?
Monday, November 8, 2010 at 1:09pm

11th grade physics
if action and reaction are always equal and opposite, why dont they always cancel each other and leave no force for acceleration of the body?
Monday, November 8, 2010 at 1:20am

11th grade physics
find the value of 60 joule per minute on a system which has 10 cm,100gm, and 1 minute as fundamental units.
Monday, November 8, 2010 at 1:13am

11th grade
A 7.8 kg block initially at rest is pulled to the right along a horizontal, frictionless surface by a constant, horizontal force of 14.8 N. Find the speed of the block after it has moved 2.8 m. Answer in units of m/s
Sunday, November 7, 2010 at 11:48am

11th grade Math
37t = 54t-162 -17t = -162 t = 9.52941165
Thursday, November 4, 2010 at 11:38pm

11th Grade AP English
i have to wright an essay tomorro comparing The Great Gatsby and The Color of Water. Can anyone help me get some ideas/topics on what i should wright about?
Thursday, November 4, 2010 at 1:40pm

11th grade Math
Distance = rate * time Let t = time for first car 37t = 54(t-3) Solve for t.
Thursday, November 4, 2010 at 1:34pm

11th grade physics
You place a box with a mass of 20kg on an inclined plane that makes a 35.0° angle with the horizontal. What is the component of the gravitational force acting down the inclined plane?
Tuesday, November 2, 2010 at 3:36pm

11th grade
Sodium Vapor lamps emit a characteristic yellow light . What can we deduce about sodium atoms, based on this observation?
Monday, November 1, 2010 at 6:59pm

11th grade
Please post the correct School Subject so a teacher in that field will read your post. Sra
Sunday, October 31, 2010 at 7:18pm

11th grade
volatile liquids with lower boiling points give better results than those with higher boiling points. suggest a reason for this.
Sunday, October 31, 2010 at 4:30pm

11th grade Chemistry
the compound adrenaline contains 56.79% c,6.56% h,28.27% and 8.28% n by the mass what is the empiricol formula
Thursday, October 28, 2010 at 12:35pm

11th grade Algebra
The answer to this question is -3. The equations work out to be -3n-7=-2n-4, and then you can just work it out for yourself.
Thursday, October 21, 2010 at 12:03pm

11th grade
Use the following functions to solve. f(x) = x2 + x + 1; g(x) = 5 - 2x; h(x) = -x2 Solve f(g(-1))
Wednesday, October 20, 2010 at 12:08pm

Math, not "11th grade"
Please type your subject in the School Subject box. Any other words, including obscure abbreviations, are likely to delay responses from a teacher who knows that subject well.
Tuesday, October 19, 2010 at 8:41am

11th grade
a meter stick of wight 0.8 n is pivoted at 40 cm mark at which mark 1n load should be located to balence the sticke
Tuesday, October 19, 2010 at 8:14am

11th grade science needs help
Indicate your subject in the "School Subject" box, so those with expertise in the area will respond to the question.
Monday, October 18, 2010 at 3:25pm

11th grade
a 65kg diver jumps off of a 10m tower. find the diver´s velocity when he hits the water?
Sunday, October 17, 2010 at 11:51pm

11th grade
how do bacterial plasmids relate to resistance and how do they relate to genetic engineering. i am very syuck and i need help please
Sunday, October 17, 2010 at 10:45pm

11th grade
When the shuttle bus comes to a sudden stop to avoid hitting a dog, it decelerates uniformly at 5.3 m/s2 as it slows from 9.5 m/s to 0 m/s. Find the time interval of acceleration for the bus. Answer in units of s
Monday, October 11, 2010 at 11:33am

11th grade math
secondary largest possible answre is Answer: x⋅(38-2⋅x)2 Answer: 8.06181572077
Friday, October 8, 2010 at 6:38pm

11th grade math
had this same probem for college pre-calculue couldnt solve B any other way but guess and check/logic x=4.5
Friday, October 8, 2010 at 6:27pm

11th grade physics?
Indicate your subject in the "School Subject" box, so those with expertise in the area will respond to the question.
Monday, October 4, 2010 at 4:28pm

11th grade Algebra
A number is multiplied by -3 and then this product is decreased by 7. The result is 4 less than twice the opposite of the number. what is the number?
Sunday, October 3, 2010 at 8:42pm

11th grade
How would I solve the following equation for x? 2 sin^2(x) + 3 tanx secx = 2 I've tried the problems from different approaches, but couldn't come up with a solution. Could you please provide your thought process. It would be greatly appreciated. Thanks!
Friday, October 1, 2010 at 4:45pm

11th grade
How many uranium atoms are there in 9.5 g of pure uranium? The mass of one uranium atom is 4 × 10−26 kg
Thursday, September 30, 2010 at 9:13pm

11th grade
A roller coaster moves horizontally, then travels 45 m at an angle of 30 degrees above the horizontal. What is its displacement from its starting point?
Wednesday, September 29, 2010 at 8:12pm

11th grade
VRMS =sqrt[(3RT)/M] and The most probable speed is 81.6% of the rms speed, and the average speed 92.1% (distribution of speeds). Take care with units of M and R
Friday, September 24, 2010 at 11:25am

Math, not "11th grade"
Please type your subject in the School Subject box. Any other words, including obscure abbreviations, are likely to delay responses from a teacher who knows that subject well.
Friday, September 24, 2010 at 8:39am

11th grade
An automobile with an initial speed of 4.56m/s accelerates uniformly at the rate of 2.4m/s2. Find the final speed of the car after 4.4 s. Answer in units of m/s.
Tuesday, September 21, 2010 at 5:41pm

11th grade
When the shuttle bus comes to a sudden stop to avoid hitting a dog, it decelerates uniformly at 3.8 m/s2 as it slows from 8.8 m/s to 0 m/s. Find the time interval of acceleration for the bus. Answer in units of s.
Tuesday, September 21, 2010 at 5:36pm

Math, not "11th grade"
Assistance needed. Please type your subject in the School Subject box. Any other words, including obscure abbreviations, are likely to delay responses from a teacher who knows that subject well.
Monday, September 20, 2010 at 7:06pm

11th grade
When the shuttle bus comes to a sudden stop to avoid hitting a dog, it decelerates uniformly at 3.8 m/s2 as it slows from 8.8 m/s to 0 m/s. Find the time interval of acceleration for the bus. Answer in units of s.
Monday, September 20, 2010 at 6:32pm

Math needs h elp
The School Subject is not 11th grade. If it is Math, please state that. Sra
Sunday, September 19, 2010 at 6:03pm

11th grade
for example in #1. 2x-1=y if y=0; 2x-1=0 then x=1/2 if x=0; 2(0)-1=y then y=-1 on the graph plot the points (1/2,0) and (0,-1) draw a line containing those points..
Thursday, September 16, 2010 at 9:08pm

11th grade
need help with these problems can anyone help me- 2x-1=y 2x=y-6 3y=-6x x+4y=12 Thank you
Thursday, September 16, 2010 at 8:47pm

11th grade science (help needed)
Indicate your subject in the "School Subject" box, so those with expertise in the area will respond to the question.
Thursday, September 16, 2010 at 1:21pm

11th grade math
4(x^2-4x+3) You can factor this further by seeing which 2 numbers subtract to 4 (your middle term) and add to 3 (your last term). Post if you want it checked/need help.
Tuesday, September 14, 2010 at 10:49pm

11th grade Algebra II
2x-5y+z=23 4x+3y-5z=1 3x-3y-4z=9
Tuesday, September 14, 2010 at 6:56pm

11th grade
Angle QRS is a straight angle. If a=2c, c=2b, and b=d/3, what are the values of a,b,c,and d? a+b+c+d = 180
Tuesday, September 14, 2010 at 6:35pm

11th grade
I think it says what do you do after gym class (without the question mark)...Entonces, voy a la mi clase de matematicas. (Then, I go to math class.)
Thursday, September 9, 2010 at 10:41pm

11th grade
Lo que se hace despues de la clase de educacion fisica.
Thursday, September 9, 2010 at 10:31pm

11th grade
V = Ab*h/3. Ab = area of base. Ab = 10cm * 6cm = 60cm^2, V = 60cm^2 * 4cm /3 = 80cm^3.
Sunday, September 5, 2010 at 9:12pm

11th grade math
Let x = one angle, then 3x - 8 = other angle and they add to 180º. Solve for x.
Tuesday, August 31, 2010 at 12:08pm

11th grade
You are traveling at a rate of 50 m/s. If you accelerate at a rate of -15 m/s2, what will be your velocity after 3 seconds?
Wednesday, August 25, 2010 at 7:46pm

11th grade
look up its density: volume= mass/density
Monday, August 23, 2010 at 5:10pm

11th grade
192 m = 0.192 km tan 8.4 = 0.192/d
Sunday, August 22, 2010 at 7:01pm

11th grade
in the distance you see an arch 192m. you estimate your line of sight with the top of the arch to be 8.4 degrees above the horizontal. appox how far in kilometers are you from the base of the arch?
Sunday, August 22, 2010 at 6:57pm

11th grade Maths
Can someone help me understand what that even function & odd function is, in trignometry
Sunday, August 8, 2010 at 8:49am

11th Grade Physics
A stone falls from a tower and travels 100m in the last second before it reaches the ground. Find the height of the tower
Thursday, August 5, 2010 at 12:37pm

11th Grade Physics
If a particle's motion is described as x = ut+1/2at^2, where x is position, t is time and u and a, are constants. Show that the acceleration of the particle is constant
Thursday, August 5, 2010 at 12:35pm

11th grade
Calculate the molecular mass of the nonionic solutes: 64.3 g of solute in 390 g of water raises the boiling point to 100.680 degrees C.
Wednesday, August 4, 2010 at 3:03am

11th Grade Physics
The maximum speed of a bus is 72km/h, it accelerates uniformly at the rate of 1m/s^2 and retards uniformly at the rate of 4m/s^2. Find the least time in which it can do a journey of 1km ?
Tuesday, July 27, 2010 at 9:02am

11th grade Physics
Difference between Atomic spectrum and emission spectrum. First give me the clear cut definition of both and then the difference!!!
Saturday, July 24, 2010 at 2:28pm

Maths 11th Grade
2π/5 radians = 72° so let one angle be x then the other is x+72 we know x + x+72 = 90 2x = 18 x = 9 So the two angles are 9° and 81°
Wednesday, July 21, 2010 at 1:59pm

Maths 11th Grade
The difference between the two acute angles of a right-angled triangle is 2(pie)/5 radians. Express the angles in degrees?? How to Solve it
Wednesday, July 21, 2010 at 1:25pm

11th grade
I wonder if it dissolved? Stirring increases the rate of dissolving, pretty critical if you are measuring temp. Heat is lost rapidly, so if it is dissolving slowly, you won't see the max temp peak.
Sunday, July 18, 2010 at 1:47pm

11th grade
in the heat of soultion lab what would happen to the delta T if the soultion CaCl2 was not stireed with the water?
Sunday, July 18, 2010 at 1:20pm

11th grade,physical science
what are the advantages and disadvantages of chlorine? what is chlorine?
Thursday, July 15, 2010 at 3:54am

Grade 11th Physics
I have already shown you how to do the three problems. Each requires one step. I will be happy to verify that you have followed directions
Thursday, July 8, 2010 at 6:59pm

Grade 11th Physics
Sir I want the answers so i could match my answers with yours
Thursday, July 8, 2010 at 8:36am

Grade 11th Maths
(Second time posting this problem)This problem is related to Chapter-Sets. Please solve the question using x method. x method means x ∈ A ∩ B Q. If AUB=Ø, then prove that A=Ø,B=Ø
Sunday, July 4, 2010 at 7:48am

Grade 11th Maths
This problem is related to Chapter-Sets. Please solve the question using x method. x method means x ∈ A ∩ B Q. If AUB=Ø, then prove that A=Ø,B=Ø
Tuesday, June 29, 2010 at 7:12am

Grade 11th Maths
This problem is related to Chapter-Sets. Please solve the question using x method. x method means x ∈ A ∩ B Q. If A-B=A then show that A∩B=Ø
Tuesday, June 29, 2010 at 7:11am

Grade 11th Maths
This problem is related to Chapter-Sets. Please solve the question using x method. x method means x ∈ A ∩ B Q. If A⊂B, then prove that B'⊂A'
Tuesday, June 29, 2010 at 7:09am

Grade 11th Chemistry
How many molecules of water and oxygen atoms are present in 0.9g of Water. this numerical is based on Mole Concept. Kindly solve it!!!
Monday, June 28, 2010 at 1:55pm

11th Grade Physics
I want two examples based upon law of conservation of charge i know the definition just want two examples!!!
Friday, June 25, 2010 at 7:39am

11th grade
i realy dont understand how they must of felt when the pirates arrived and how they felt towards their diffrence in manners.
Sunday, June 20, 2010 at 3:01pm

science? needs h elp
The School Subject is NOT 11th grade. Please list carefully: science, chemistry, etc. whatever it may be to get the proper volunteer teacher. Sra
Wednesday, June 16, 2010 at 1:06pm

11th grade
Calculated how many grams of methane (CH4) are in a sealed 80 mL flask at room temperature (22ºC) and 780 mm Hg of pressure.
Wednesday, June 16, 2010 at 11:09am

11th grade chemistry
How many grams are in 2.7 mol of table salt, NaCl (molar mass of NaCl=58.44 g/mol)?
Wednesday, June 2, 2010 at 11:03am

11th grade math
Divide the area by the length. width = (x^3 + 12x^2 +47x +60)/(x + 5) That ratio can be simplified by factoring x+5 out of the numerator, and cancelling it with the deominator. You will be left with x^2 + 7x + 12 for the length.
Tuesday, May 25, 2010 at 2:16am

11th grade
write an expression that represents the width of a rectangle with length x+5 anmd area x to the 3 power + 12x to the 2nd power+ 47x+60
Monday, May 24, 2010 at 11:38pm

Physics 11th grade
The Io i used was (1*10^-12) for A and (1*10^-10) for B. That was according to my physics book. I got A correct with 630.9573445 W/m^2.
Friday, May 21, 2010 at 8:53pm

Physics 11th grade
I get 6309 W/m^2 for A and 10^-10 W/m^2 for B. Do you have the correct Io ?
Friday, May 21, 2010 at 8:47pm

11th grade English
Write your own journal entry from the perspective of a member of Bradford's colony. What do you think of these unruly pirates? What shocks you the most about these surly characters? How do the manners of the pirates differ from yours?
Sunday, May 16, 2010 at 3:32am

11th grade Physics
A student makes a magnet by winding wire around a nail and connecting the wire to a battery. Which end of the nail will be the north pole?
Wednesday, May 5, 2010 at 8:38am

11th grade
If it was 1 gram it would be 540 calories, but you have 500 g so how many calories?
Tuesday, May 4, 2010 at 11:17am

11th grade
The latent heat of vaporization of water is 540 calories/gram. How many calories are required to completely vaporize 500 grams of water?
Tuesday, May 4, 2010 at 11:08am

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