Tuesday

January 24, 2017
Total # Posts: 464

**Physics**

An isolated 3 kg object is moving in the positive y direction along the -y axis at 2 m/s; when it reaches the origin it breaks into two pieces sending a 1 kg fragment in the +y direction at a speed of 3.7 m/s. what are the velocity and direction of the other piece immediately ...

*December 16, 2010*

**Physics**

a 60 kg person falls off a 15 kg sled moving at 2 m/s. The person doesn't move after falling. Assuming no friction with the ice, and not other net forces acting on the sled, what is the change in velocity of the sled after the person falls off.

*December 16, 2010*

**10th grade math help**

How do you solve? 3-3sinx-2cos^2(x) = 0

*December 13, 2010*

**4th grade algebra**

-21... oh the days of fourth grade... have fun!

*November 12, 2010*

**math gr.6**

im in 6th grade but i have this book that says scott forson its blue

*November 2, 2010*

**Foreign Languages**

ok french and russian

*November 2, 2010*

**Foreign Languages**

o ok

*November 2, 2010*

**Foreign Languages**

how do you say goodafternoon in evry laungega

*November 2, 2010*

**english 6th grade**

what if it says Marco, my older brother, likes to play ________________ tennis. my older brother is underlined would that be nonrestrictive or restrictive

*November 2, 2010*

**english 6th grade**

Please help Ms.Sue its a six grade level.

*November 2, 2010*

**english 6th grade**

what does restrictive and nonrestrictive mean???????

*November 2, 2010*

**science**

what man made object has the greatest acceleration ?

*November 2, 2010*

**spanish 6th grade**

tnks

*November 1, 2010*

**spanish 6th grade**

how do you say what is your favorite food in spanish

*November 1, 2010*

**science**

is it condensationi am not sure

*November 1, 2010*

**science need help!**

i am doing questions and i just want to say i need help the question says ____________ affects how much moisture is in the air i don't get it

*November 1, 2010*

**math**

the area of a rectangle is 60cm.the length is 11cm more than the width. find the width.

*November 1, 2010*

**psyc**

Studies that have overcome methodological problems in examining intelligence scores for African-Americans as compared to people of Anglo- Saxon descent revealed: that the test results were useless because racial prejudice invalidated them. that African-Americans scored higher ...

*October 31, 2010*

**psyc**

According to Noam Chomsky, language is primarily acquired through: an innate mental module. our parents correcting us. imitating our parents. trial and error. I chose B. Is this right?

*October 31, 2010*

**psychology**

Now I am a little confused...was my first option right?

*October 31, 2010*

**2nd grade,science**

run dance play talk so much more!!!

*October 31, 2010*

**6th grade**

ok thank you so much! :)

*October 29, 2010*

**6th grade**

but what if the problem is 16 2/7 - 10

*October 29, 2010*

**6th grade**

sooo will it be the same if you had 16 2/7 -10 ______________ you would have to change 10 into 9 and and put 7/7 so it would be like this 16 2/7 -10 7/7 but you would have take something to make it a problem

*October 29, 2010*

**6th grade**

how do you solve a problem when you have one whole # with a whole # and fraction. this is subtracting ex: 16 -10 2/7 ________________

*October 29, 2010*

**math**

11/850 b/c 13/52*12/51*11/50

*October 27, 2010*

**english**

why is Theodor a hero and why is he so important

*October 18, 2010*

**Calculus**

Find the derivative by the limit process. 6/√(8x)

*October 15, 2010*

**Calulus**

Consider the following function. f(t) = 3t2 − 3 (a) Find the average rate of change of the function below over the interval [3, 3.1]. (b) Compare this average rate of change with the instantaneous rates of change at the endpoints of the interval. (at t = 3) (at t = 3.1)

*October 15, 2010*

**calculus**

The tangent line to the graph of y = h(x) at the point (-6, 9) passes through the point (6, 2). Find the following values. (a) h(-6) (b)h '(-6)

*October 15, 2010*

**Physics**

an canoe is 5.67 in m how long in cent?

*October 14, 2010*

**5th grade**

l=32 l=2 (e) l=5 (e) l=(2xe)+(5xe)=L e=4 m=8 o=20

*September 30, 2010*

**calculus**

Determine the equation of a curve in the xy-plane that passes through the point (0, 1) and has the slope x2 sin 4x at any point (x, y) on the curve.

*September 29, 2010*

**math**

3x³=90

*September 16, 2010*

**math**

-3.1

*September 16, 2010*

**writing**

I have to write a thesis statement on a belief i have that have changed and why

*July 20, 2010*

**General Chemistry**

What happens to the rate of evaporation of a liquid after… a. a decrease in temperature b. an increase in the surface area of a liquid exposed to air c. an increase in the intermolecular forces

*July 14, 2010*

**math**

This is a place for homework help, not for chatting and randomness.

*June 1, 2010*

**science**

The greatest velocity a falling object reaches is called its what?

*May 6, 2010*

**chemistry**

how many grams of copper hydroxide can b prepared from 2.7g of copper (II) nitrate and excess sodium hydroxide?

*March 23, 2010*

**chemistry**

how many grams of copper hydroxide can b prepared from 2.7g of copper (II) nitrate and excess sodium hydroxide?

*March 23, 2010*

**Math**

set S is composed of the square of every element of the set {-5,5}. what is S?

*March 21, 2010*

**Chemistry**

im not quite sure what to do with this problem... the info I have: -balanced equation= (CuCl2*2H20)=>CuCl2+2H2O -initial mass of copper compound: 0.94g Q: use stiochiometry to find the theoretical yield for the mass of copper (II) chloride we also used 30mL of water in our ...

*February 28, 2010*

**3rd grade**

How many day in a leep year?

*February 26, 2010*

**2nd grade**

no, mainly igneous rocks come from lava.

*February 22, 2010*

**art**

i am researching a piece of art work by frida kahlo and i need more infomation about he work, any sujestions?

*February 4, 2010*

**calculus**

Which has more area, the region in the first quadrant enclosed by the line x+y=1 and the circle x^2+y^2=1, or the region in the first quadrant enclosed by the line x+y=1 and the curve sqrt(x)+sqrt(y)=1? Justify your answer.

*January 21, 2010*

**Algebra**

what is "5x + 7 = 22" simplified? x

*January 12, 2010*

**social studies ww1**

what was united states policy toward the war when it broke out PLEASE HELLLLP

*December 1, 2009*

**social studies**

world war one

*December 1, 2009*

**social studies**

why did the nations of Europe go to war

*December 1, 2009*

**science**

a teacher does 140 J of work in 20 s. How much power did he use?

*November 16, 2009*

**science**

in the course of a short race,a car does 50,000 J of work in 7 s. What is the power of the car during a race?

*November 16, 2009*

**science**

a libraian lifts a box of books that weighs 93 N a distance of 1.5 m. How much work does he do?

*November 16, 2009*

**science**

as you push a lawnmower the horizontal force is 300 N. If you push the mower a distance of 500 m, how much work do you do?

*November 16, 2009*

**science**

dr.bob222 i don't get it can u give me the answer

*November 15, 2009*

**science**

how much power, in watts, is needed to cut a lawn in 50 min if the work ivolvled is 100,000 j

*November 15, 2009*

**science**

how much power, in watts, is needed to cut a lawn in 50 min if the work ivolvled is 100,000 j

*November 15, 2009*

**science**

suppose you are pulling a wagon with the handle at an angle. How can you make your task easier?

*November 15, 2009*

**social studies**

why did the us want to build a canal across panama 2 how did the us gain control of the panama canal zone 3 how did the people of panama feel about us control of the canal zone why 4 what agreement did the us make with panama in 1977 5 what are the countries of central America

*November 9, 2009*

**english**

were public places segregated in 1948

*November 9, 2009*

**science**

what is orbital motion and lubricant

*November 8, 2009*

**science8 intergeted**

what is lubricant and orbital motion

*November 8, 2009*

**chemistry, science**

Carbon is also removed from the atmosphere during the process of weathering. carbon dioxide combines with water to form carbonic acid. this reacts with calcium silicate (in rocks) to produce calcium ions, bicarbonate ions and silicon dioxide (silica) the chemical equation for ...

*November 2, 2009*

**physics**

1008176.54J

*October 28, 2009*

**General Chemistry**

Question 1: In the Balmer-Rydberg equation, what value of m is used to determine the wavelengths of the Balmer series? m=? Question 2: List a possible set of four quantum numbers (n,l,ml,ms) in order, for the highest energy electron in gallium,Ga.

*October 25, 2009*

**science**

what factors affect the friction forces between two surfeces 2a what is the law of universal gravitation

*October 20, 2009*

**science**

1a-b)what are the four types of friction what factors affect the friction force between two surfaces

*October 20, 2009*

**Math Data Management**

In how many ways can the 12 members of a volleyball team line up, if the captain and assistsant captain must remain together? Thank you in advance.

*September 21, 2009*

**French**

Some interesting facts about the euro tunnel, the eurostar and the shuttle?

*September 16, 2009*

**english**

thank u

*September 15, 2009*

**english**

Ihave just read me it is a disaster,sorry for the errors

*September 15, 2009*

**english**

Dear americans,I would like to retranscribe me the speech of obama in high school in Norfolk (video is on youtube) please make it for a French desperate person (it is my first year at high school) what methods shall I be able to use to understand English better?

*September 15, 2009*

**tech**

in tech we are reasearching inventors chefs and designers i chose to research, Gordan Ramsey i have all ready found out most of my info which i need to collect but i am having trouble with, .who is his inspieation. and .why did he become a chef.

*September 4, 2009*

**Trig problems**

Part 1) Evaluate tan 7.5 Part 2) Evaluate exactly cos (-(45pi(4)))

*August 14, 2009*

**French 2 help!**

okay, thanks, it was right

*August 13, 2009*

**French 2 help!**

Jen e veux pas savoir ____ est arrive. a. ce qui b. ce que Je crois _____, je vois, C'est tout. a. ce qui b. ce que I think 1 is a and 2 is b... am I right?

*August 13, 2009*

**Math**

In a random sample of 30 tires of the same type, it is found that the average life span is 36,200 miles with a standard deviation of 3800 miles. Find the interval about the sample mean such that the probability is 0.77 that the mean number lies within the interval. a. 35,402-...

*July 3, 2009*

**Math-stats**

thanks

*July 2, 2009*

**Math-stats**

The playing times of 20 songs on a top-hits radio station are recorded in the chart below. Playing Time (minutes:seconds) 3:32 3:24 2:54 3:07 4:52 3:45 2:39 3:09 3:34 3:26 3:35 4:17 4:03 3:52 5:10 4:59 3:07 4:00 3:07 2:56 In a histogram of this data, which bar would have the ...

*July 2, 2009*

**Math**

Use the first five terms of the trigonometric series to find the value of sin pi/12 to four decimal places. a. 0.2618 b. 0.2588 c. 0.7071 d. 0.2648 I got B, is this right?

*June 27, 2009*

**math**

I get confused with negatives sometimes! thanks though!!

*June 24, 2009*

**math**

Simplify: (-1-2i)+(4-6i) I get 3-8i and 5-8i... confused, which one is it?

*June 24, 2009*

**science**

does anyone know if, orange juice is a pH indicator??

*June 22, 2009*

**science**

ok thanks!! you have been a great help [x]

*June 22, 2009*

**science**

i need to make a p.h indicator in sience but i cant think of any other than.. tea bags, some sort of juice and.. red cabbage anyone got any sujestions?

*June 22, 2009*

**Spanish**

Come up with a question to these answers. Si, de Alicante. No, es médica. No, es argentina.

*June 18, 2009*

**Math**

Write the standard form of the equation of the parabola whose directrix is x=-1 and whose focus is at (5,-2)? a) (y+2)^2 = 12(x+2) b) y-2 = 12(x+2) c) x+2 = 1/12(y+2)^2 d) x-2 = 1/12(y+2)^2 I get A and D? confused!

*June 17, 2009*

**Math**

oohh yes i did! thanks!!

*June 16, 2009*

**Math**

oh, so it is C?

*June 16, 2009*

**Math**

For 4x^2 - 4xy + y^2 = 4 find θ, the angle of rotation about the origin, to the nearest degree? a) 27° b) 63° c) 333° d) 307° I got A, is this right?

*June 16, 2009*

**Algebra**

inead help on math homework

*June 14, 2009*

**Math**

oh! thanks for your time!

*June 9, 2009*

**Math**

tan^-1(1/2)=x=.463648 tan^-1(2/3)=y.588003 x+y+pi/2 = -z=2.62245 z=-2.62245 cos (z) = -.868243 and tan a= -1/2 tan b= -2/3 tan (a+b)=(tan a +tan b)/(1-tan a.tan b) so tan (a+b)= -7/4 sec^2 x-tan^2 x=1 so sec (a+b)=√(1+49/16) =√(65/16) (a+b)=1/sec (a+b) so cos(a+b) ...

*June 9, 2009*

**Math**

ohh okay thanks!

*June 9, 2009*

**Math**

If α and β are two angles in Quadrant II such that tan α= -1/2 and tan β = -2/3, find cos(α+β) Work: cos(α+β) = [ 1 - (tan α)(tan β) ] / [ 1 + (tan α)(tan β)] cos(α+β) = [ 1 - (-1/2)(-2/3) ] / [ 1 + (-1/2)(-...

*June 9, 2009*

**Math**

thanks for checking (;

*June 8, 2009*

**Math**

Find the measure of the reference angle for 400 degrees. I did the work and got 40 degrees, is this right?

*June 8, 2009*

**Math**

Thanks for checking!

*June 8, 2009*