Saturday

October 10, 2015
Total # Posts: 421

**Physics**

I tried solving this using by drawing it out, using trig and newton's laws to calculate Fx and Fy and used these values to calculate work in x-direction and y-direction. Finally I used Workx and Workx to find overall work with pythagoras....is this correct? I got 6.21J as ...
*November 17, 2009*

**Physics**

An object is placed on an inclined plane which forms an angle B = 18º with the horizontal. An external force F of magnitude 14.3 N is applied to the object. The force F acts in a direction which forms an angle A = 62º with the horizontal. As a result of the force F, ...
*November 17, 2009*

**Physics**

Yes I see what you're saying after drawing the diagram...So for the first bit we just use plain substitution of GPE formulas and second bit is trig. =) thanks that seemed easier than i thought.
*November 17, 2009*

**Physics**

A pendulum consists of an object of mass m = 1 kg swinging on a massless string of length l = 258 cm. The object has a speed of 1.6 m/s when it passes through its lowest point. What is the greatest angle with the vertical that the string makes during the motion of the object? ...
*November 17, 2009*

**calculus**

Thanks for your help. It helped me figure out the correct answer. The second derivative is 240x^3+360x^2-1800x. From there I factored and got 120x(2x^2+3x-15)=0. then used the quadratic formula to get (-3+sqrt129)/4, (-3-sqrt129)/4, and 0.
*November 12, 2009*

**calculus**

Consider the function f(x)=12x^5+30x^4–300x^3+2. f(x) has inflection points at (reading from left to right) x=D,E, and F. where D is___, E is____, and F is____.
*November 12, 2009*

**Math**

5 doller bills and 3 dimes
*October 19, 2009*

**Spanish**

Are you sure? I was thinking the first one is era because it describes a person.
*October 18, 2009*

**Spanish**

Hi, I was wondering if you would use "era" or "fue" in these sentences: La persona que se murió más recientemente era (fue?) una mujer. El deiciocho de agosto era (fue?) la fecha que ella fue al hospital. Thanks for the help!
*October 18, 2009*

**calculus**

The slope of the tangent line to the parabola y=4x2–6x+6 at the point where x=5 is: The equation of this tangent line can be written in the form y=mx+b where m is: and where b is:
*October 16, 2009*

**math**

have a good night mathmate.
*October 14, 2009*

**math**

yeah, I was messin up on that part, but now I have the same result as you. Thanks Mathmate. LoL
*October 14, 2009*

**math**

nevermind I got it, thanks.
*October 14, 2009*

**math**

this is what I did 56 567 *11.400 00.000 000.000 2626.800 56567.000 565670.000 which all =624863.800
*October 14, 2009*

**math**

I got 624863.800.
*October 14, 2009*

**math**

I am doing long multiplication and I need help. 56 567*11.400=
*October 14, 2009*

**Science (Grade 8)**

are you asking for their formulas?
*October 14, 2009*

**Medical Physics**

A 18000kg airplane lands with a speed of 77 m/s on a stationary aircraft carrier deck that is 115 m long. Find the work done by nonconservative forces in stopping the plane. I have an exam on this tomorrow and I am confused any help would be appreciated.
*October 13, 2009*

**Physics university **

ugh confused
*October 12, 2009*

**literary **

what is tone, mood, and irony?
*October 12, 2009*

**literary **

what is foreshadowing and what is flashback?
*October 12, 2009*

**Twilight**

5,000,000
*October 12, 2009*

**Geography Hook for Presentation**

We're comparing the historical tornadoes that passed through both areas, however we're just looking for a generalized tornado hook to begin our presentation
*October 6, 2009*

**Geography Hook for Presentation**

Were doing a 5 minute presentation to the class on tornadoes comparing the Tornados in Region, to Barrie Canada. Just wondering if anyone had any creative ideas we could use to hook the class in to this topic! any suggestions would be wonderful, Thanks
*October 6, 2009*

**Physics**

Imagine a right-angle triangle with angle θ = 40o on the left. The serves as an increasing slope. On the slope is an object of mass m1= 340 g on an inclined surface. The angle of the inclined surface is θ = 40o with the horizontal. The object m1 is connected to a ...
*October 6, 2009*

**literary**

Hero
*October 1, 2009*

**calculus**

I am suposed to solve for x if the FUNCTION is equal to 5.
*September 30, 2009*

**calculus**

well it said that in the book but it wants you to solve for x IF the function is equal to 5.
*September 30, 2009*

**calculus**

The equation of the function is: f(x)=4-2(x-6)^1/3, for x not equal to 5 calculate precisely the value of f(x). so I got this: 5=4-2(x-6)^1/3 1=-2(x-6)^1/3 (-1/2)=(x-6)^1/3 (-1/2)^3=(x-6) -.125=x-6 now the next step is suposed to be this but I don't understand how they got...
*September 30, 2009*

**Social**

yes, but fiction can still be history even if it was off the top of someones head. Someone telling a story about someone else who was in a different time period. They may not have exact information from that person. But the information they useis still believable. It puts the ...
*September 29, 2009*

**Social**

Why is history better than fiction?
*September 29, 2009*

**University Physics**

A small box is held in place against a rough vertical wall by someone pushing on it with a force directed upward at 28degrees above the horizontal. The coefficients of static and kinetic friction between the box and wall are 0.40 and 0.30, respectively. The box slides down ...
*September 28, 2009*

**Physics but algebra problem**

Thanks so much!!!!
*September 23, 2009*

**Physics but algebra problem**

Where i am having a problem to....Do you have same prob James? Acceleration is stumping me.
*September 23, 2009*

**Physics but algebra problem**

I'm not sure how to do the algebra the m in the denominator is confusing me. 0_0 so sorry i'm so difficult i feel stupid. not sure how to solve for m.
*September 23, 2009*

**Physics but algebra problem**

huh?? 260,000 Newtons?
*September 23, 2009*

**Physics but algebra problem**

Prob is I not sure exactly how to do the algebra when I plug in the a. and doesn't the m just cancel out? 0_0
*September 23, 2009*

**Physics but algebra problem**

When you lift a bowling ball with a force of 89 , the ball accelerates upward with an acceleration . If you lift with a force of 99 , the ball's acceleration is 2. I'm guessing a is 9.8 m/s since it's gravity. I trying to figure out the weight w and acceleration a...
*September 23, 2009*

**Physics but algebra problem**

Having issue with algebra. 89N=ma 99N=m2a would you do something like plugging one into the other such as. a=89/m 99N=99/(2(89/m) prob is when i get a fraction in the denominator i get confused can someone help me. I'm trying to find the mass. Which i will then convert ...
*September 23, 2009*

**Math**

How do I solve this math problem.. (-11-6--5+1+3x2) divided by -5
*September 17, 2009*

**Physics**

Thx I got it!!!
*September 15, 2009*

**Physics**

The archerfish hunts by dislodging an unsuspecting insect from its resting place with a stream of water expelled from the fish's mouth. Suppose the archerfish squirts water with a speed of 2.45 m/s at an angle of 53.0 degrees above the horizontal, and aims for a beetle on ...
*September 15, 2009*

**social studies**

may you please name 1 or more explore(s) that searched for a northwest passage?
*September 7, 2009*

**biology**

respiration works better at higher temperatures because the higher the temperature the more you sweat and the more you sweat more respiration occurs. TELL ME WAT U THINK!
*September 7, 2009*

**AP World History**

Thank you very much! They helped me (:
*August 20, 2009*

**AP World History**

Who can compare&contrast North American racial ideologies with Latin American/Caribbean racial ideologies from the years 1500-1830? Where can I get information about this topic?
*August 20, 2009*

**Math**

If h(x)=3/(2x+1), find h(2)
*July 27, 2009*

**economics**

thanks
*May 17, 2009*

**economics**

Hi. I was wondering if someone could please tell me what states are getting the most stimulus money to stimulate new job creation? Thanks.
*May 17, 2009*

**Essay**

I'm doing an essay on allergic reactions and I have to tell about the symptoms. I have a question, fever is not a symptom is it?
*March 25, 2009*

**Latin**

I am trying to write "there are many islands" in Latin. How do you say there? Or can you just start with "are"? Would many islands count as a predicate nominative, or is it would you go into the accusative tense? Thanks!
*February 23, 2009*

**chemistry**

Answer the following for a primitive cubic unit cell. Answers should be numerical, set r = 7.0. edge in terms of r, the lattice pt radius=? face diagonal in terms of r, the lattice pt radius=? body diagonal in terms of r, the lattice pt radius=?
*February 16, 2009*

**Math**

what is 13 1/2 - 11 5/16?
*February 8, 2009*

**physical**

how do i get a 45 year old inactive male who weighs 280lb and has a body comp of 55% lean mass and 45% fat mass.down to his goal! his goal is to alter his body comp to 80%-20% and lower his weight to 200lbs
*February 1, 2009*

**spanish**

I updated my paragraph. Can you see if this is written correctly? Yo soy una buena candidata porque soy siempre flexible, dedicada, y trabajadora. Hace más de cinco anos que nado. Me he entrenado para ser una salvavidas. Me gusta estar al aire libre y cerca de una ...
*January 31, 2009*

**chemistry**

An aspirin tablet weighing 0.475 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. Exactly 3.00 mL of the solution was ...
*January 26, 2009*

**chemistry**

What is the % transmittance for each of these errors Washing a cuvette with DI water, then failing to rinse it with the solution to be measured Failing to wipe off fingerprints from the cuvette. Changing the wavelength from maxtomax+10 nm.
*January 26, 2009*

**math**

how far is it from California to colodrado?
*January 20, 2009*

**math**

(1/x - 3/x+4) / (1/x square - 16) please help me with this question if you can show the work or explain how to solve.
*January 15, 2009*

**math**

the concentration of a mixture is guven be the following function: c(t)=(2x+9)/3(x+12) A.what is the maximum amount of concentration that this function can reach in terms of percent? B. what is the name of the line you looke for to answer part A.
*January 15, 2009*

**ms. sue, english please!**

What if assistant teaching is being used as a verb? Hyphenated or not? As in: I have been assisant teaching with my grandmother for four years.
*December 23, 2008*

**english**

Really? I thought it was hyphenated.
*December 21, 2008*

**english**

Is 'assistant-teaching' connected by a hyphen or should it be two separate words? Thanks!
*December 21, 2008*

**Question??? English**

ooo...yeah so this are the answer chooses...sorry to mention that...jejeje
*December 10, 2008*

**Question??? English**

1. a Christmas feast 2. a new dress 3. a doll 4. a beautifully decorated Christmas tree
*December 10, 2008*

**Question??? English**

In The Year of the Perfect Christmas Tree, what Ruthie wants for Christmas is 1. a Christmas feast. 2. a new dress. 3. a doll. 4. a beautifully decorated Christmas tree.
*December 10, 2008*

**6th grade**

woopsy looks like 10 mins are up
*October 30, 2008*

**My short Story called deeper ever deeper**

It's good, though there may be some grammer mistakes. I didn't know it would have a sad ending though. Overall, a good story
*October 29, 2008*

**Health**

If I have 20/70 vision what is the power of the lenses needed to correct my vision (how do I calculate it?)
*October 28, 2008*

**math**

thank you u save my life
*October 2, 2008*

**math distributive property**

what is the answer to 5{45+5}=
*September 26, 2008*

**5th grade**

how many thousandths are in a hundredth?
*September 7, 2008*

**pre algebra**

the number of months in y years
*August 18, 2008*

**math**

How do you do array multiplication? e.g. 59 times 67
*August 17, 2008*

**Math**

because he has no tea
*May 13, 2008*

**physics**

A 4400 kg car can acceletare from 0-25 m/s in 4 seconds. What force must the engine created to accomplish this acceleration? 176 N 1100 N 17600 N 27500 N An elevator is moving up with an acceleration of 3.36 m/s squared. What would be the apparent weight of a 64.2 kg man in ...
*April 30, 2008*

**physics**

An incident X-ray photon of wavelength 0.2800nm is scattered from an electron that is initially at rest. The photon is scattered at an angle of 180.0 degrees and has a wavelength of 0.2849nm. Use the conservation of linear momentum to find the momentum gained by the electron. ...
*April 26, 2008*

**chemistry(vapor pressure)**

When a student plotted ln [vapor pressure of a gas] vs. inverse Kelvin temperature, she obtained a straight line with a slope equal to -20000 K. According to the Clausius Clapeyron equation, (triangle)Hvap is ? kJ/mol
*April 24, 2008*

**Chemistry.. help plz**

whats the anwser?
*April 13, 2008*

**Microbiology**

Molecular chronometers are used to determine the course of evolution. Explain in full what these are and how they are used. Why, even with this "tool", is evolution still so complex?
*April 13, 2008*

**Microbiology**

You have a debate in your study group whether rRNA alone can be used to determine the relatedness of organisms up to species level. Explain IN FULL whether you agree or disagree.
*April 13, 2008*

**History**

What is the offical name of modern china?
*April 8, 2008*

**Algebra.**

The sum of 6 times Jack's age and 5 times Larry's age is 63. Jack is 1 year less than 3 times as old as Larry. Find eachh of their ages.
*March 27, 2008*

**math**

Can someone please help me with my question? I don't understand how to find the line of best fit.
*March 6, 2008*

**math**

Okay, thanks.
*March 6, 2008*

**math**

Thank you, but I have another question. Would I have to square root r^2, because how else would I find the value or r?
*March 6, 2008*

**math**

I don't understand this problem at all. It involves finding the line of best fit. The question says, for a set of data, the line of best fit is y= -3x-4 and that r^2 is 0.22. What is the correlation coefficient? I don't know how to solve this.
*March 6, 2008*

**Pre-Algebra**

Simplify 8Y^2 - 3Y + 3Y^2 - 4Y + 12
*March 4, 2008*

**Pre-Algebra**

Simplify: -2W+4R-W+-10R+6
*March 4, 2008*

**Pre-Algebra**

-7(p-3)+2p=24
*March 4, 2008*

**Math**

-4-5-7h=49
*March 4, 2008*

**Science**

I did a science experiment on batteries. I ran five brands of AA Alkaline batteries until they would no longer run a small light bulb. I measured the voltage of each battery every hour. I did this experiment four times using the same type of light bulb and the same brand of ...
*February 17, 2008*

**chemistry**

please anwser this
*February 11, 2008*

**chemistry**

the structure is not angular in water
*February 10, 2008*

**chemistry**

its not D
*February 10, 2008*

**science**

when sedimentary rock is buried it may change into metamorphic rock. describe two causesof this change.
*January 31, 2008*

**physics!**

The mass of an automobile is 1160kg, and the distance between its front and rear axles is 2.54m. The center of gravity of the car is between the front and rear tires, and the horizontal distance between the center of gravity and the front axle is 1.02m. Determine the normal ...
*January 5, 2008*

**Algebra**

what is the y-intercept of the line with a slope of -3 and a y-intercept of -5? How so i do this problem?
*December 9, 2007*

**Social Studies**

I am doing a crossword puzzle. One of the questions was "The electoral college was developed because some of the founding fathers believed that too much democracy was a very ____thing
*November 8, 2007*

**science**

how do pesticides affect fertilisers herbicides in a food web? help!
*October 27, 2007*