Sunday

November 29, 2015
Total # Posts: 223

**Physics**

In this sound interferometer, sound waves enter at A and travel to C via paths ABC and ADC. the intensity of the sound can be determined by the microphone placed at C. The length of the path ADC can be changed by a sliding tube. The frequency is fixed at a certain value and ...
*November 25, 2015*

**Maths**

The temperature is shown at 6:00am. It is rising at one degree every thirty minutes. At this rate, it will be 20 degrees at what time?
*November 25, 2015*

**physics**

Thank you Steve!
*July 6, 2015*

**physics **

In all parts: assume the the air temperature is 17.8o C, so the speed of sound in air is 342.0 m/s. Part A. Suppose a ship's foghorn is sounded toward an iceberg, and an echo is heard 6.16 s later. Find the distance from the ship to the iceberg. d = ? m Part B. b) Suppose ...
*July 6, 2015*

**Emerson**

I'm helping my son he is in 4th grade . His hw it's hard and this is the problem : find two mixed numbers. So that the sum is 7 2/8 and the difference 2 4/8.
*March 3, 2015*

**easy,fun math**

i need how many fish belle eats not how many left
*January 6, 2015*

**easy,fun math**

Belle gets 3 buckets of fish evreyday. there are 8 fish in each bucket.if Belle eats two and a half buckets of fish,how many fish will she eat?
*January 6, 2015*

**L.A**

we had an essay to do about rising action and to answer your question either B or none
*January 6, 2015*

**Math**

yes i agree A
*January 6, 2015*

**4th grd math**

lol we do it was actually a penguin
*January 6, 2015*

**4th grd math**

Belle gets 3 buckets of fish evreyday. there are 8 fish in each bucket.if Belle eats two and a half buckets of fish,how many fish will she have left
*January 6, 2015*

**Literature**

abcdefg
*December 11, 2014*

**algebra**

no i did not leave anything out. this is excatly how the problem is writen
*March 8, 2014*

**algebra**

find two point for the following equation and plot the point on graph 4x=5
*March 8, 2014*

**Math**

The student activities department of a community college plans to rent buses and vans for a spring-break trip. Each bus has 40 regular seats and 1 handicapped seat; each van has 8 regular seats and 3 handicapped seats. The rental cost is $305 for each van and $985 for each ...
*March 2, 2014*

**Math**

2)Banquet Seating A banquet hall offers two types of tables for rent: 6-person rectangular tables at a cost of $26 each and 10-person round tables at a cost of $51 each. Kathleen would like to rent the hall for a wedding banquet and needs tables for 250 people. The room can ...
*March 2, 2014*

**Math**

A financial consultant wishes to invest up to a total of $33,000 in two types of securities, one that yields 8% per year and another that yields 6% per year. Furthermore, she believes that the amount invested in the first security should be at most one-third of the amount ...
*March 2, 2014*

**MATH**

A financial consultant wishes to invest up to a total of $33,000 in two types of securities, one that yields 8% per year and another that yields 6% per year. Furthermore, she believes that the amount invested in the first security should be at most one-third of the amount ...
*March 2, 2014*

**Math**

Manufacturing A factory manufactures two products, each requiring the use of three machines. The first machine can be used at most 70 hours; the second machine at most 40 hours; and the third machine at most 90 hours. The first product requires 2 hours on machine 1, 1 hour on ...
*March 1, 2014*

**Math**

Manufacturing A factory manufactures two products, each requiring the use of three machines. The first machine can be used at most hours; the second machine at most hours; and the third machine at most hours. The first product requires hours on machine hour on machine and hour...
*March 1, 2014*

**math**

What is 27 times 3/8
*February 19, 2014*

**CHEMISTRY**

A garden fertilizer contains 15% by mass of nitrogen. The recommended usage is 30g of fertilizer per 10dm^3 of water. What is the concentration of nitrogen in this solution? a)0.15 g dm^-3 b)0.30 g dm^-3 c)0.45 g dm^-3 d)3.00 g dm^-3
*October 19, 2013*

**Math**

The variables x and y are related by the equation y=ax/(x-b),where a and b are constants .When y is plotted against y/x ,a straight line is obtained .The line has gradient 3 and y-intercept 2. (i)Find the values of a and b (ii)Find the values of x which x=y
*August 8, 2013*

**math**

Can be more specific? still do not understand ... The answer for part (ii) should be y=7.4(0.2)^2 and the values of q is o.2 ..
*August 8, 2013*

**math**

A diagram shows a straight line graph of In y against x,passing through the point (0,2) and having gradient -3/2 . The variables x and y are connected by the equation y=pq^x ,where p and q are constants Find (i)the value of p and of q ,to one decimal place (ii)the equation ...
*August 8, 2013*

**math**

1.Express (xe^x)^2=30e^(-x) in the form lnx=ax+b,and find the value of a and of b . 2.solve 4(3^2x)=e^x
*July 26, 2013*

**Reading**

Do you have the story animal senses
*March 16, 2013*

**Reading**

Animal senses
*March 5, 2013*

**math**

Help!!!!
*January 4, 2013*

**algebra**

solve each system by elimination 9x-6y=-30 x-3y=6
*December 17, 2012*

**math**

write a 4-digit number with a 0 in the hundreds place and a 0 in the tens place.Now write another number,using the same four digits and tell which number is larger.
*August 22, 2012*

**principles of physics**

You go to SS?
*March 24, 2012*

**math**

In a group of 9 coins, one is fake and weighs slightly more. What is the fewest number of times you need to use a pan balance to find the counterfeit coins? (A pan balance is a scale used to measure weights, where weights are placed in two pans. The heaviest pan will go down ...
*January 22, 2012*

**Math 543**

how did you solve
*January 22, 2012*

**Physics**

Identical +6.15 µC charges are fixed to adjacent corners of a square. What charge (magnitude and algebraic sign) should be fixed to one of the empty corners, so that the total electric potential at the remaining empty corner is 0 V?
*January 17, 2012*

**Math**

A coin is tossed three times. If heads appears on all 3 tosses, Mary will win $16. If heads appears on 2 of the tosses, she will win $2. The game costs $5 to play. What is her mean expectation?
*January 16, 2012*

**physics**

A 1000kg rocket is moving forward at 10m/s in space. A 10,000N force is applied to the rocket for one second from behind. How fast is the rocket now traveling? a. 0m/s b. 10m/s c. 15m/s d. 20m/s
*November 1, 2011*

**science**

homogeneous are Blood, Carbon dioxide gas, solid carbon dioxide ,air, oxygen heterogenous are rock, steak, iron, rust, concrete,milk.
*October 17, 2011*

**physics**

For women's volleyball the top of the net is 2.24 m above the floor and the court measures 9.0 m by 9.0 m on each side of the net. Using a jump serve, a player strikes the ball at a point that is 3.03 m above the floor and a horizontal distance of 8.4 m from the net. (a) ...
*October 10, 2011*

**science**

if each person in the red team is pulling a rope with a force of 250N and each person in the blue team is pulling with a force of 200N what is the total force excerted by the blue team?
*September 15, 2011*

**Biology**

Can someone please check my answers for the following 'choose the best answer'? Which of the following cellular functions would be most directly related to a malfunction of the Golgi apparatus? a)ATP production b)degradation of macromolecules c)secretion of proteins d)...
*September 15, 2011*

**Biology**

Can someone please check my answers for the following 'choose the best answer'? Which of the following cellular functions would be most directly related to a malfunction of the Golgi apparatus? a)ATP production b)degradation of macromolecules c)secretion of proteins d)...
*September 15, 2011*

**Calculus**

Please help? Let F(a) be the area between the x-axis and the graph of y=x^2cos(x/4) between x=0 and x=a, for a>0 (consider the area to be negative if the graph lies below the axis). Find the formula for F(a).
*September 14, 2011*

**Biology**

Can someone please check my answers for the following 'choose the best answer'? Which of the following cellular functions would be most directly related to a malfunction of the Golgi apparatus? a)ATP production b)degradation of macromolecules c)secretion of proteins d)...
*September 14, 2011*

**Including students with special needs**

How could you use the notion of behavior functions to understand how students can find and press teachers' "hot buttons"?
*July 29, 2011*

**Including students with special needs.**

How does this approach differ from traditional responses to student behavior?
*July 29, 2011*

**Including Students with Special needs.**

How would understanding the function of a student's behavior influence your response to it?
*July 29, 2011*

**Mathematics**

Identify the slope and y-intercept of the following table values. x 5,10,15,20,25 y -80,-40,0,40,80
*July 11, 2011*

**Chemistry**

Vinegar is a dilute solution of acetic acid. What is the concentration of acetic acid in the vinegar if 26.5 mL of NaOH at 0.250 M are required to neutralize 10.0 mL of vinegar?
*July 5, 2011*

**Calculus (pleas help!!!)**

Oh ok I got it... the local max is 2a/3 and the local min 0....
*April 6, 2011*

**Calculus (pleas help!!!)**

Let p(x)=x^2(a−x), where a is constant and a greater than 0. Find the local maxima and minima of p. (Enter your maxima and minima as comma-separated xvalue,classification pairs. For example, if you found that x=−2 was a local minimum and x=3 was a local maximum, ...
*April 6, 2011*

**Got it**

Got it....
*April 6, 2011*

**Calculus (urgent!!)**

Find a formula for a curve of the form y=e^((−(x−a)^2)/b) for b greater than 0 with a local maximum at x=−5 and points of inflection at x=−8 and x=−2.
*April 6, 2011*

**Calculus (urgent!!)**

Find a formula for a curve of the form y=e^((−(x−a)^2)/b) for b greater than 0 with a local maximum at x=−5 and points of inflection at x=−8 and x=−2.
*April 6, 2011*

**Calculus Please Help**

Find a formula for a curve of the form y=e^((−(x−a)^2)/b) for b greater than 0 with a local maximum at x=−5 and points of inflection at x=−8 and x=−2.
*April 6, 2011*

**Calculus (pleas help!!!)**

Find a formula for a curve of the form y=e^((−(x−a)^2)/b) for b greater than 0 with a local maximum at x=−5 and points of inflection at x=−8 and x=−2.
*April 6, 2011*

**3rd grade math**

divide 25 into 6 equal groups.
*March 14, 2011*

**Finance**

what would be your monthly car payment on a $15000 4 year loan @ 10%. Payments are made at the end of each month
*March 12, 2011*

**physics**

A cannon on a stationery railway truck fires a shell of mass 5 kg with a velocity of 240 m.s -1. The mass of the cannon is 600kg. The cannon recoils and moves back on the rails and collides with a stationery truck of mass 400 kg. The velocity of the cannon after the collision ...
*February 10, 2011*

**physics**

an aeroplane of mass 8000kg flying at 600km.h-1 fires a projectile of mass 100kg at a speed of 900 km.h-1. Calculate the velocity of the aeroplane after firing if the projectile was fired a)forward b) backward
*February 10, 2011*

**physics**

truck A of mass 2,5 x 10(4) kg approaches a second truck B of mass 2 x 10(4) kg with a velocity of 12 m.s -1 and collides with it. After collision the two trucks move apart with equal but opposite momenta. Calculate what the velocity of B was before the collision
*February 10, 2011*

**physics**

A laden lorry of mass 3000kg travelling due east at 40 m.s -1 collides head on with a large truck of mass 2000kg travelling at 30 m.s -1. the two vehicles combine during the collision. Calculate the velocity with which the two wrecks move after collision.]
*February 10, 2011*

**ss**

the americans claimed to fight for liberty and freedom. how did these ideals make women amd enslaved africans question their postitions in society
*January 20, 2011*

**chemistry**

its a problem on my homework but thanks you for showing my what to do. its much appreciated
*December 16, 2010*

**chemistry**

What is the pH of a solution prepared to contain 155 grams of HCl in 200.0 mL? Can you tell me how to do it? I can't remember how...
*December 16, 2010*

**Physics**

Intensity(1) x Area(1) = Intensity(2) x Area(2) 109.7 x (pi(26.8)^2) = Intesity(2) x (pi(8500)^2) Intensity(2) = 1.09 x 10^-3
*November 22, 2010*

**philosophy**

Supply the missing premise or conclusion of the ff. enthymeme in such a way that the resulting syllogism is valid. Write the resulting syllogism in standard form and test it for validity using a Venn diagram. What things would you take into account in evaluating it? Question: ...
*November 17, 2010*

**philosophy**

Supply the missing premise or conclusion of the ff. enthymeme in such a way that the resulting syllogism is valid. Write the resulting syllogism in standard form and test it for validity using a Venn diagram. What things would you take into account in evaluating it? Question: ...
*November 17, 2010*

**philosophy**

Thank you so much Octavio. I appreciate your help. I wonder what program you're taking. Maybe i can be of help to you in some courses i've taken and maybe you're yet to take.
*November 17, 2010*

**philosophy**

Thanks. It's my first time using this site and wanted to see what suggestions i might get. What i come up with is.. Legislation that cannot be enforced are disrespect for the law. All marijuana possession are disrespect for the law. Therefore, disrespect for the law are ...
*November 17, 2010*

**philosophy**

Supply the missing premise or conclusion of the ff. enthymeme in such a way that the resulting syllogism is valid. Write the resulting syllogism in standard form and test it for validity using a Venn diagram. What things would you into account in evaluating it? Question: ...
*November 17, 2010*

**physics**

Vt=rw r=Vt/w so: r = 60m/s÷[56rev/s(2πrad/1rev) r=0.17 m
*November 3, 2010*

**Chemistry**

Substance A has a melting point of -10 degree celcius and a boiling point of 57 degree celcius. Sunstance B has a melting point of -67 degree celius and a boiling point of 15 degree celius. Room temperature is 20 degree celcius. (A) What is the physical state of substance A at...
*October 18, 2010*

**physics**

in what direction should a force be applied to produce maximum torque.?
*October 17, 2010*

**math**

you have to list all the different possibilities in your paper. 5women 1man 4women 2men try different combinations of 6 members where there is always more women than men
*October 10, 2010*

**Math**

I need to solve for t in the following expression. A/(1+B^t/2) = C using logarithms. how do I get started
*October 10, 2010*

**Math analysis**

thanks :)
*October 10, 2010*

**Math analysis**

I have a problem that says to Use the laws of logarithms to expand and simplify the expression. ln(x(x + 1)(x + 2)) .. I keep getting ln(x)+ln(x^2+3x+2) but I'm wrong. What im i doing incorrectly?
*October 10, 2010*

**economics**

Formula is: P2-P1 _________ (P2+P1)/2 I got some of the calulation: Percentage change in P= .20 Quantity/.4 Price Elasticity of Demand = 0.5 P2-4 _______ = 0.5 (P2+4)/2 How can I resolve this ecuation?
*October 7, 2010*

**economics**

Studies indicate that the price elasticity of demand for cigarettes is about 0.4. If a pack of cigarettes currently costs $4 and the government wants to reduce smoking by 20 per cent, by how much should it increase the price? Show your calculations. (b) If the local government...
*October 7, 2010*

**physics**

A brick is thrown upward from the top of a building at an angle of 15° to the horizontal and with an initial speed of 16 m/s. If the brick is in flight for 2.8 s, how tall is the building?
*September 27, 2010*

**1st grade**

there were 3 dogs and only two bones oh no,what shall we do!!
*September 27, 2010*

**North & Central America**

canals affect which of the 5 themes of geography the most
*September 17, 2010*

**physics**

A certain freely falling object requires 1.25 s to travel the last 35.5 m before it hits the ground. From what height above the ground did it fall?
*September 16, 2010*

**physics**

Races are timed to an accuracy of 1/1000 of a second. What distance could a person rollerblading at a speed of 8.5 m/s travel in that period of time?
*September 16, 2010*

**physics**

TWO LOCOMOTIVES APPROACH EACH OTHER ON PARALLEL TRACKS. EACH HAS A SPEED OF 95KM/H WITH RESPECT TO THE GROUNG. IF THEY ARE INITIALLY 8.5KM APART, HOW LONG WILL IT BE BEFORE THEY REACH EACH OTHER?
*September 12, 2010*

**Business Economics**

"How do I find out which manufactures in the US sell the most Oxygen Concentrators?"
*August 19, 2010*

**Math--**

if the longest brick is 27 inches, it means that you have to multiply 9*27 which will give you the length of the brick wall
*May 19, 2010*

**human resources**

I'm not sure what and how to write this assignment. Question: Write a response recommendation analysis of no less than 200 to 300 words of how large firms and small firms might utilize change management concepts to meet growing technology demands. Provide one example for a...
*April 14, 2010*

**Physics 121**

A bicycle wheel has a radius R = 32 cm and a mass M = 1:80 kg which you may assume to be concentrated on the outside radius. Assume that you apply a force F to a sprocket so that the wheel has an angular acceleration ® = 4:50 rad/s2. A resistive force f = 131 N is applied ...
*March 27, 2010*

**Calculus**

What's the antiderivative of x(2x-6)^(1/2)?
*February 25, 2010*

**ecology**

Which level of organism has the least energy available to it a) beetle c)sparrow b)spider d) hawk *maple tree->beetle->spider-->sparrow->hawk explain how you know, why because its primary, secondary, decomposer etc...
*December 15, 2009*

**chemistry**

paraffin, octadecane, octane, isooctane, methane
*December 6, 2009*

**Math**

Cool, thanks.
*November 10, 2009*

**Math**

Determine the future value of an annuity due into which quarterly deposits of $450 are made for nine years if the annuity pays 10% compounded quarterly.
*November 10, 2009*

**science**

At its highest point, the pendulum is 1.2m above the ground and as a gravitational potential energy of 62J. If the gravitational potential energy is 10J at its lowest point, what is the pendulum's kinectic energy at this point?
*October 27, 2009*

**calculus**

what do i do with the 14kpa/min?
*October 22, 2009*

**calculus**

When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV^{1.4}=C where C is a constant. Suppose that at a certain instant the volume is 340 cubic centimeters and the pressure is 87 kPa and is decreasing at a ...
*October 22, 2009*

**us history**

list some of the advantages of using indentured servants
*September 13, 2009*

**us history**

american value that was developed during the enlightment?
*September 13, 2009*