Tuesday

January 27, 2015

January 27, 2015

Total # Posts: 141

**physics**

There are two pit balls equally charged and each with a mass of 1.5g. While one ball is suspended by a thread, the other is brought close to it and state of equilibrium is reached. In that situation,the two balls are seperated by 2.6cm and the thread attached to the suspended ...
*January 5, 2015*

**Pre-Calc**

At a swim meet, a parent is videotaping his son from a seat in the stands that is 20 meters past the starting line and 8 meters away from his son's lane. Let x represent the distance the son has swum. a. Write x as a function of (theta). b. At what angle does the parent ...
*December 7, 2014*

**Science**

What volume of 0.050M sodium hydroxide is needed to react with 25cm3 of 0.068M ethanoic acid?
*November 26, 2014*

**Geography**

How has mexico's culture been shaped by conflict among other people?
*November 21, 2014*

**Math**

thank you so much Frank!!
*November 16, 2014*

**Math**

A photocopy was made of Julie's watercolor painting. the photocopy resized the painting so that it measured 4 inches wide by 7 inches long. If the actual painting is 16 inches wide, what is the length?
*November 16, 2014*

**Calculus**

A marble is dropped from the top of the empire state building. a. Determine the position and velocity functions for the marble b. What is the average velocity for the first 3 seconds of flight? c. Whatisthespeedofthemarblewhent=0? t=3? t=6? d. How long does a person looking up...
*November 8, 2014*

**Calculus**

Joshua jumps from a platform diving board that is 32 feet above the water. The position of the diver can be modeled by s(t) = -16t2+16t+32, where s is his position and t is the seconds that have gone by since he jumped. When does the diver hit the water, and what was his ...
*November 8, 2014*

**Statistics**

12 cards are drawn with replacement from an ordinary deck of 52 cards. What is the probability that 4 queens of hearts, 4 aces of spades, and 4 kings of clubs are drawn?
*September 14, 2014*

**Statistics**

The question also asks for a Venn diagram to explain the answer.
*September 14, 2014*

**Statistics**

If P(A/B)=1 must A=B?
*September 14, 2014*

**Differential Equations**

Classify the following differential equations as linear or nonlinear: 3x' +5x=7t^2 4x^2+2x+5tx=0
*September 11, 2014*

**math**

James swims 3/4 miles 5 times a week. How far does he swim in one week.
*April 10, 2014*

**Chemistry**

Benzene has a heat of vaporization of 30.72kJ/mol and a normal boiling point of 80.1 ∘C. At what temperature does benzene boil when the external pressure is 480torr ?
*April 7, 2014*

**Math**

Thanks man!
*March 30, 2014*

**Math**

Find the number of elements in A1∪A2∪A3, supposing that there are 103 elements in A1, 992 elements in A2, 10011 elements in A3, in each of the following situations: (a) The sets are pairwise disjoint, that is, no pair has common elements, that is, the intersection ...
*March 30, 2014*

**Chemistry**

A 2.6 g of a substance that looks like gold needed 9.4 J of heat energy to raise its temperature from 20 to 38 ºC. Is the metal pure gold?
*March 7, 2014*

**Physics**

Hello bobpursley, can you get someone like yourself to help me with my physics problem which is posted right below this question
*November 13, 2013*

**Math/Science**

Then how would I find the toatl displacement from starting point?
*November 13, 2013*

**Math/Science**

An ocean liner is traveling at 5m/s. A passenger on deck walks towards the rear of the ship at a rate of 4m/s. After walking 30 meters, he turns right and walks at a rate of 4m/s to the rail, which is 12 meters from his turning point. What is his velocity relative to the water...
*November 13, 2013*

**Chemistry**

FeCl3(aq) + K2S(aq) Fe2S3(aq) + KCl(aq) Consider the unbalanced equation above. What is the maximum mass of Fe2S3 that can be produced when 54.5 mL of 0.480 M FeCl3 and 98.5 mL of 0.420 M K2S react?
*October 7, 2013*

**Chemistry**

C2H6(g) + O2(g) CO2(g) + H2O(g) (a) Consider the unbalanced equation above. What is the maximum mass of CO2 that can be produced when 21.0 g of C2H6 and 38.5 g O2 react? (b) If 24.7 g of carbon dioxide is actually produced by the reaction in part (a), what is the percent yield...
*October 7, 2013*

**Chemistry**

What is the maximum mass of the lower molar mass product that can be formed when 83.0 g of solid barium bromide and 20.5 g chlorine gas react?
*October 7, 2013*

**Chemistry**

Al(s) + HCl(aq) AlCl3(aq) + H2(g) Zn(s) + HCl(aq) ZnCl2(aq) + H2(g) Consider the unbalanced equations above. A 0.200 g sample of a mixture of aluminum and zinc metal is reacted with an excess of hydrochloric acid. Both metals react with hydrochloric acid. The sample produces ...
*October 7, 2013*

**Physics**

A fireworks rocket is moving at a speed of 48.4 m/s. The rocket suddenly breaks into two pieces of equal mass, which fly off with velocities v1 and v2, as shown in the drawing. What is the magnitude of (a) v1 and (b) v2? In the image the two pieces are going off in a right ...
*October 6, 2013*

**Civics **

What is the definition of a citizen and where did this concept begin? Please help :)
*September 26, 2013*

**Physics**

A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 4.53 m/s2. She decides to test the car by dragging with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 1.01 s before Kathy. If Stan moves ...
*September 20, 2013*

**Algebra**

Solve for M: 3P = 12C + 10MC
*September 3, 2013*

**Algebra**

y = ax, has asymptote ________ and y-intercept ________.
*May 5, 2013*

**Chemistry**

for the reaction 2NaOH + h2SO4 yieda 2H2O + Na2SO4 if .80 moles of NaOH are used, how many moles of H2SO4 must be used?
*May 2, 2013*

**Chemistry**

For a particular redox reaction NO2– is oxidized to NO3– and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in basic solution. Phases are optional.
*April 1, 2013*

**Chemsitry**

For a particular redox reaction NO2– is oxidized to NO3– and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in basic solution. Phases are optional.
*April 1, 2013*

**science**

What is the formula for friction force
*March 27, 2013*

**turnford**

prove the following 2 cosec 2θ cos2θ = cotθ - tanθ
*March 13, 2013*

**turnford**

prove the following 2 cosec 2θ cos2θ = cotθ - tanθ
*March 13, 2013*

**Spanish Please help**

Will somebody please help or translate these. Thank You 4. Which expression is used to talk about what you have just done? venir de hacer la tarea hacer un viaje acabar de 5. Vengo de la clase. ¿Qué acabo de hacer? Acabas de bailar. Acabas de bailas. Acabas de ...
*January 31, 2013*

**Spanish help please.**

Thnk you so much. Your sure these are right.
*January 28, 2013*

**physics**

a plane flys 350 km south along a straight path with an average velocity of 125 km/h to the south. the plane has a 30 minute layover and then travels 220 km south with an average velocity of 115 km/h to the south. what is the average velocity of the trip
*November 13, 2012*

**Accounting**

When calculating the times interest earned ratio, you you include "interest expense on debt extinguishment" in the interest expense? Thanks!
*November 8, 2012*

**English**

Create a Halloween story by filling in the blanks with adjectives. Remember adjectives are words that describe or tell about nouns. The words in () is my adjective answer I used. You Cannot use an adjective more than once The ____(full) moon was shining down on the _____,(old ...
*October 29, 2012*

**Physical Science**

You submerge 100 grams of steel in 200 grams of water. If the steel has an initial temperature of 80°C and the water has an initial temperature of 10°C, what is the final temperature of the system? The specific heat capacity of the steel is 0.15 cal/g•°C
*October 12, 2012*

**Math**

What are the base-five numbers for the base-ten counting numbers 1 to 26?
*October 8, 2012*

**arithmetic**

How is eight hundred twenty-six thousandths written in decimal form?
*October 8, 2012*

**Economcis**

Is GDP calculated by the price of the good with the indirect tax or the price of the good before the indirect tax? For example, if an economy only produces a single $10 good and it is taxed 10%, is GDP $10 or 11$? Thanks!!!
*October 8, 2012*

**Chemistry**

How many milliliters of an aqueous solution of 0.219 M magnesium bromide is needed to obtain 10.1 grams of the salt ?
*October 3, 2012*

**Dynamics**

The rotor is an amusement park ride where a person enters the Rotor when it is stationary and stands against the wall with their back against the wall. The rotor then begins to spin around a vertical axis. After reaching cruising speed, the floor drops away and the patron is ...
*September 28, 2012*

**Chemistry**

Mg +2HCL = MgCl2 +H2 what mass of hydrogen is obtained by adding excess hydrochloric acid to 6g of magnesium
*September 25, 2012*

**10th grade honors chemistry**

1.3 pounds of a material with a density of 3.7 g/mL would occupy what volume in liters?
*August 29, 2012*

**math**

lol thanks
*July 29, 2012*

**math**

the following all-red train and all-green train are equal in length. Do these trains give information about common factors, common multiples, or both?
*July 29, 2012*

**basic calculus**

use the first and second derivatives to find the x-coordinates of all local maxima and minima of f(x)=8e^2x-2x. indicate which of your answers are local minima and which are local maxima.
*May 14, 2012*

**college alegbra**

1/2 log 25- 3 log x
*May 2, 2012*

**Spelling**

Can anyone tell me the meaning of the word bade? Example for this sentence:The next morning John got up early and bade Rover goodbye.
*March 27, 2012*

**Math**

There's a triangle the numbers on each sides are 22 25 and 11 What is it's perimeter and area? Answer: P is 58 A is 345 There's a rectangle the numbers on 2 of the sides says 4 and 1 What is the Perimeter and area? Answer: P is 10 and A is 4 There's a rectangle...
*January 19, 2012*

**Math.**

On the paper it says height= 1 b
*January 19, 2012*

**Math.**

On finding a perimeter and area and there is a decimal for the shape but the 2 other numbers on the shape don't. Do I multiply/add with the decimal on all numbers or only on that 1 number? EXAMPLE There is a triangle one side is 1.5 the base is 2 and the other side is 3 ...
*January 19, 2012*

**Math**

9.000?
*January 19, 2012*

**Math**

Same thing on area? 1.5 X 2.0 X 3.0=9000?
*January 19, 2012*

**Math**

On finding a perimeter and area and there is a decimal for the shape but the 2 other numbers on the shape don't. Do I multiply/add with the decimal on all numbers or only on that 1 number? EXAMPLE There is a triangle one side is 1.5 the base is 2 and the other side is 3 ...
*January 19, 2012*

**Math**

The size of houses and buildings are measured in square feet. If you measured the outside length and width of a house and found the length was 60ft. and the width was 30ft., what is the size of the house in square feet? 60x30 and I got 1800ft
*January 18, 2012*

**Math**

All these are either rectangles or squares 1.Rectangle. 5 is length and 10 is width 10x5=50 2.Square. 5 is length and 5 is width 5x5=25 3.Rectangle. 6 is length and 8 is width 8x6=48 4.Square. 10 is length and 10 is width 10x10=100 5.Rectangle. 40 is length and 20 is width ...
*January 18, 2012*

**Triangles/Math**

The size of houses and buildings are measured in square feet. If you measured the outside length and width of a house and found the length was 60ft. and the width was 30ft., what is the size of the house in square feet? 60x30 and I got 1800ft
*January 18, 2012*

**Triangles/Math**

All these are either rectangles or squares 1.Rectangle. 5 is length and 10 is width 10x5=50 2.Square. 5 is length and 5 is width 5x5=25 3.Rectangle. 6 is length and 8 is width 8x6=48 4.Square. 10 is length and 10 is width 10x10=100 5.Rectangle. 40 is length and 20 is width ...
*January 18, 2012*

**Triangles/Math**

All of these are triangles Find the areas of the triangles 1. 8 is base and 5 is height A=bxh divided by 2 8x5=40 divided by 2=20 2. 6 is base and 7 is height A=bxh divided by 2 7x6=42 divided by 2=21 3. 12 is base and 5 is height A=bxh divided by 2 12x5=60 divided by 2=30 4. ...
*January 18, 2012*

**ELA**

Nation?
*January 18, 2012*

**ELA**

We're from the United States, to make a better Union, to make justice, to make sure of freedom, provide defense, more happiness, and help us, everyone, and our future, and to be written and accepted to the Constitution for the United States Of America.
*January 18, 2012*

**ELA**

Reread the Preamble. Then rewrite it in common, everyday language. We the people of the United States, in order to form a more pefect Union, establish justice, insure domestic tranquillity, provide for the common defense, promote the general welfare, and secure the blessings ...
*January 18, 2012*

**Math**

Find the perimeter of each rectangle or square. L=length W=width L=45 W=20 45+45+20+20=130 Correct??
*January 17, 2012*

**Math**

Find the perimeter of each rectangle or square. L=length W=width L=45 W=20 45+45+20+20=130 Correct??
*January 17, 2012*

**Math**

Find the perimeter of each rectangle or square. s=sides s=34 I think the shape is the square cause the square has all even sides so 34x4=136 Is this correct?
*January 17, 2012*

**Math**

There's a rectangle. On 1 side is 8 which is the Length side I have to find out how long the width side is. The whole perimeter has to equal 25 P=25 So if both length sides are 8 then that equals 16. Now I have to see how much both width sides are I did 25-16 and I got 9 ...
*January 17, 2012*

**Math**

There's a rectangle. On 1 side is 8 which is the Length side I have to find out how long the width side is. The whole perimeter has to equal 25 P=25 So if both length sides are 8 then that equals 16. Now I have to see how much both width sides are I did 25-16 and I got 9 ...
*January 17, 2012*

**Math**

There's a square. On 1 of the sides it's 8.4 What is the perimeter? I got 33.6 cause on each side of a square is the same size so 8.4x4=33.6 Is this correct?
*January 17, 2012*

**Math**

There's a square. On 1 of the sides it's 8.4 What is the perimeter? I got 33.6 cause on each side of a square is the same size so 8.4x4=33.6 Is this correct?
*January 17, 2012*

**Math**

There is a picture of a hexagon On 1 of the sides it says 3.2 What is the perimeter? I got 19.2 cause on hexagons there is 6 sides and all of them are even so 3.2x6=19.2 Is this correct?
*January 17, 2012*

**physics**

A skier of mass 54.6 kg comes down a slope of constant angle 21◦ with the horizontal. The acceleration of gravity is 9.8 m/s2 . What is the force on the skier parallel to the slope? Answer in units of N
*January 10, 2012*

**physics**

A skier of mass 54.6 kg comes down a slope of constant angle 21◦ with the horizontal. The acceleration of gravity is 9.8 m/s2 . What is the force on the skier parallel to the slope? Answer in units of N
*January 10, 2012*

**physics**

A skier of mass 54.6 kg comes down a slope of constant angle 21◦ with the horizontal. The acceleration of gravity is 9.8 m/s2 . What is the force on the skier parallel to the slope? Answer in units of N
*January 10, 2012*

**physics**

a man applies a force of 220 N horizontally to the right against a 50 kg crate. the force of friction between the crate and the floor is 200 N. if the crate is pushed 2.0 m, the work done is.... What formula would be applicable?
*December 4, 2011*

**physics**

a 25kg object moving with a velocity of 3m/s to the right collided with a 15 kg object moving to the left at 6 m/s. determine the velocity of the 25kg object after the collision if 15kg object a. continued to move to the left, but only at .3m/s b. rebounded to the right at ....
*December 1, 2011*

**math**

only 40% of people between the ages of 18 and 24 read the newspaper. what % of people reads the newspaper?
*November 16, 2011*

**organic chemistry**

First, you've got to specify which reaction.
*October 24, 2011*

**Physics**

If you treat the whole system as one solid thing, you will get the answer. FP= mtotal x acceleration 44= (11+13.5+1)a 44=25.5a a=1.73m/s^2 Use this acceleration value to find FTA and FTB using Newton's 2nd Law. FBT=13 x 1.73 FBT= 22.5 N (FBT and FTB are equal in magnitude...
*October 13, 2011*

**scientist**

How do I turn up the sound on a stereo without turning the volume button up?
*August 15, 2011*

**algebra II**

Select the best possible first step to solving the system by first eliminating the y variable. x + 8y = –4 2x – 4y = –13 Multiply the first equation by 2. Multiply the second equation by 2. Multiply the first equation by –2. Multiply the second equation by...
*May 19, 2011*

**math-Probablity**

Hi, just a few stupid questions about probability. 1. How many different license plates can there be if there is a total of 7 letters (no numbers) (and I'm assuming this has a something to do with permutation. 2. How many different batting line ups can be chosen from a 13 ...
*April 14, 2011*

**world history**

explain why it was difficult for Great Britain to control the New England colonies
*April 12, 2011*

**Math**

ln(x+3) + ln(x+4) = 3ln2
*March 27, 2011*

**Math (Trig.)**

A boat sailing from A to B travels in a straight line until the captain realizes he is off course. The boat is turned through an angle of 60 degrees, then travels another 10 km to B. The trip would have been 4 km shorter if the boat had gone straight from A to B. How far did ...
*March 9, 2011*

**calculus**

This is right
*November 23, 2010*

**calculus**

this is wrong
*November 23, 2010*

**global studies**

its not a question out of my book its an assignment on the land of maczeb. there is a map and a list of questions and things it wants u to look for and answer
*October 24, 2010*

**global studies**

How does geography affect the history of a nation?
*October 24, 2010*

**9th grade**

What is the definition of a crossroads for trade?
*October 24, 2010*

**calculus**

The half-life of Radium-223 is 11.43 days. If a sample has a mass of 900 mg, find the mass (in mg) that remains after 5 days
*October 14, 2010*

**calculus**

The graph of f(x) passes through the point (0,3) . The slope of f at any point P is 3 times the y- coordinate of P . Find f(1)
*October 14, 2010*

**Physics**

If an object is traveling at 24 km/h and accelerates at a rate of -.20 m/s2 , how long will it take the object to get to 8 km/h?
*September 30, 2010*

**physics**

a cannon ball is shot from a 100 m high cliff with an inital velocity of 24m/s and at an angle of 32 degrees. what is the overall final velocity of the cannonball?
*September 21, 2010*