Saturday

February 28, 2015

February 28, 2015

Total # Posts: 1,729

**Statistics**

A student group claims that first-year students at a university must study 2.5 hours (150 minutes) per night during the school week. A skeptic suspects that they study less than that on the average. A class survey finds that the average study time claimed by 269 students is = ...
*March 9, 2010*

**Physics**

A person walks 24.0° north of east for 2.80 km. How far would another person walk due north and due east to arrive at the same location?
*March 9, 2010*

**PreCalculus**

I'm unsure how to even start this problem Solve for x: Arctan( -4/5 ) + Arcos (2/SQRT(5) ) = Arctan(x)
*March 9, 2010*

**college english**

that's helps a whole lot! thanks so much Ms Sue and Writeacher! :D
*March 7, 2010*

**college english**

In the essay, I have to demonstrate that I recognize logical fallacies, but I don't understand how I can write that much about a message of somebody else when they have written so little. there's just nothing else to speak of, and I only have 500 words
*March 7, 2010*

**college english**

what do you mean by newspaper's op ed page?
*March 7, 2010*

**college english**

I was told in class to find a piece of "biased writing" and use the knowledge about critical thinking. how would i know whether an article is biased? really confused. also, it's a 1000 word essay, so it'd be really nice to get answer!
*March 7, 2010*

**Physics (Heat Engines)**

wait no the answer is A how though?
*March 6, 2010*

**Physics (Heat Engines)**

21. A heat engine operates in a cycle between temperatures 700 K and 400 K. The heat input to the engine during each cycle is 2800 J. What is the maximum possible work done by the engine in each cycle? (A) 1200 J (B) 1600 J (C) 2100 J (D) 2800 J (E) 4400 J I believe that the ...
*March 6, 2010*

**Math**

yes, it does! Thank you!
*March 3, 2010*

**Math**

zero
*March 3, 2010*

**Math**

suppose the temperature is -12 degrees F and rises 4 degrees every hour for 3 hours. What will the temp b then? Can you please help me write out the equation? Thanks
*March 3, 2010*

**pre calc **

A ramp leading to a freeway overpass is 470 feet long and rises 32 feet. What is the angle of inclination of the ramp?
*March 3, 2010*

**Physics 103**

How do I start? Problem: A helium nucleus (m= 6.65 x 10^-27 kg and q = 2e)is initially at rest. It is accelerated through a potential difference delta V and then enters a region with a constant magnetic field of strength B= 4T. It enter perpendicular to the field and undergoes...
*March 2, 2010*

**Physics 103**

So I have a question about magnetism. A charged particle moves through a region of space and experiences no magnetic force. Does that mean that the magnetic field is zero?
*March 2, 2010*

**math**

i have the capacity of 1 literbut all the water in the ocean can not fill me up.what am i?
*March 2, 2010*

**Chemistry**

Bromine can be added to limonene to create a brominated compound. When 613 mg of limonene and 3.5 mL of a 10% (v/v) solution of Br2 in dichloromethane (a solvent) are combined, 959 mg of the product is isolated. Calculate the percent yield for this reaction. If the limonene ...
*March 2, 2010*

**Physics**

h t t p : / / i m g 7 1 5 . i m a g e s h a c k . u s / i m g 7 1 5 / 2 7 6 9 / c a p t u r e q u . j p g I need help with c. for a. I got v = sqrt(2gR) for b. I got v = sqrt(gR) for c. I'm stuck
*March 1, 2010*

**RESPONSE to PreCalc**

I like how Jishka adds random symbols to my posts lol awsome :O
*March 1, 2010*

**RESPONSE to PreCalc**

Makes complete sense thank you so much!!! My only question is how come we respect domains only sometimes... For example now sin©¬/cos©¬ = (1/a)/(¡î3/a) = 1/¡î3 tan©¬ = 1/¡î3 ©¬ = 30¨¬ or pi/6 then ...
*March 1, 2010*

**Precalculs**

I have no idea how to do these type of problems. -------Problem-------- Solve each equation on the interval 0 less than or equal to theta less than 2 pi 42. SQRT(3) sin theta + cos theta = 1 ---------------------- There is an example prior to the excersises that attempts to ...
*February 28, 2010*

**Physics**

h t t p : / / i m g 2 0 5 . i m a g e s h a c k . u s / i / c a p t u r e b b . j p g / i am stuck on part c how do i find work with out using the spring constant work equals force parallel times displacement at which the force is acted during... Work done by spring = .5 kx^2 ...
*February 28, 2010*

**Math--Exponential Functions**

Suppose an investment of $500 doubles in value every 15 years. How much is the investment worth after 30 years? After 45 years? please help!!! i don't even understand how to approach this problem! =(
*February 28, 2010*

**Physics **

hmmmmmm thanks
*February 28, 2010*

**Physics **

h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 7 3 9 3 5 9 3 ok heres the problem in a picture h t t p : / / i m g 1 9 2 . i m a g e s h a c k . u s / i m g 1 9 2 / 4 5 0 0 / c a p t u r e x x w . j p g ok I called the 4 kg block m3 and the 2 ...
*February 28, 2010*

**Physics**

wait no 12 N
*February 28, 2010*

**Physics**

Is C just 9.8 N
*February 28, 2010*

**Physics**

Three blocks of masses 1.0, 2.0, and 4.0 kilograms are connected by massless strings, one of which passes over a frictionless pulley of negligible mass, as shown above. Calculate each of the following. a. The acceleration of the 4 kilogram block b. The tension in the string ...
*February 28, 2010*

**physics help **

is it no damping for all of them
*February 27, 2010*

**physics help **

f(x)=squareroot5cos1.2x f(x)=xsin4x f(x)=x^3sin5x
*February 27, 2010*

**physics help **

Damped Oscillations 1. (a) For each of following graphs, determine if graph shows damped oscillation. (b) if it shows damped oscillation : (i) identify damping factor (ii)where damping occurs Note : use a graphing calculator to sketch these graphs f(x) = ¡î5 cos 1....
*February 27, 2010*

**5th grade**

that is languages arts
*February 24, 2010*

**reading/science**

i really suck at spelling
*February 24, 2010*

**reading/science**

we have to readsearch in the plants i have the the plant uranus and i'm wondering if you can give me some websites
*February 24, 2010*

**social studies**

is it new brunswick,quebec,prince edward island,and ladrodor and thank you ms.sue
*February 22, 2010*

**social studies**

the great plains of canada are found in the canada provinces of
*February 22, 2010*

**social studies**

the appalachian mountain extend north from the united states into the canadian provinces of ______,______ ______,______ _____ _____,and _______
*February 22, 2010*

**Earth Science**

Upon what measurement is the Earth's latitude and longitude system based?
*February 18, 2010*

**pre calc need help**

A square is drawn inside a square. Find the area of the square as a function of the radius of the circle
*February 17, 2010*

**ALGEBRA**

the value, v, of a shopkeeper's inventory software program is given by v = 1/2t + 6, where t is the number of years since the shopkeeper bought the program. What is the program worth 4 years after it is first purchased? Plot the point with the given t-value, 4
*February 16, 2010*

**Biology**

why did the nuclei enriched fraction appear in the centrifuge fraction spun at the slower speed? Why didn't this fraction contain only nuclei(Why wasn't it pure?)?
*February 11, 2010*

**Physics**

1.04 m
*February 8, 2010*

**Economics**

This chart shows the components of nominal GDP for the years 2000 and 2001. All figures are in billions of current dollars. -------------------------------------------------------------------------------- Components 2000 2001...
*February 7, 2010*

**Precalculus**

I hope that the back of the book is wrong the back of the book tells me that the answer is - SQRT(5)/5 I get positive square root( 5) divided by 5 can you tell me if the answer is positive or negative if it is negative can you please explain why? Thanks! tan (theta) = 4/3, pi...
*February 7, 2010*

**College Physics**

You have 20 and 80 (unit is the upside down U) resistors in a circuit with a 100 V battery. A)These resistors are parallel. Find the current through each resistor and the voltage drop across each resistor. B) These resistors are connected in series. Find the current through ...
*February 7, 2010*

**College Physics**

It worked! :D
*February 7, 2010*

**College Physics**

The power dissipated by a light bulb increases by 50 W when the potential difference applied across the light bulb increases from 50 V to 100 V. Find the resistance of the light bulb.
*February 7, 2010*

**College Physics**

Thanks for the help! And BTW, I am not switching my name.
*February 4, 2010*

**College Physics**

How do I solve this problem: A particular wire has a current of 10A. A) How many electrons pass a fixed point every 5 seconds? B)If a wire has a radius of 2 x 10^(-3) m and the electron drift speed is 2.63 x 10^(-5) m/s, determine the number density of electrons in the wire. ...
*February 4, 2010*

**spanish 2**

i have to use 10
*January 30, 2010*

**spanish 2**

I need help with making an comic strip with 10 verbs in sentences that are in past tense. Any ideas how to start it??
*January 30, 2010*

**PreCalculus**

Hi I need some assistance on this problem find the exact value do not use a calculator cot[(-5pi)/12] Here is my attempt RT = square root pi = 3.14... cot[(-5pi)/12]={tan[(-5pi)/12]}^-1={tan[(2pi)/12-(8pi)/12]}^-1={tan[pi/6-(2pi)/3]}^-1={(tan[pi/6]-tan[(2pi)/3])/(1+tan[pi/6]...
*January 29, 2010*

**math**

how do you graph x^2+4x-1
*January 29, 2010*

**spanish 2**

How do you say these sentences in spanish in past tense. The dog took the letters to the mailbox. The dog is driving to the mailbox. The dog is reading the letter.
*January 28, 2010*

**Statistics **

Please post your response in this question here is my original question that didn't get answered. h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 4 5 5 3 7 3 0
*January 27, 2010*

**Statistics**

I don't mind you showing me the caluclator key strokes to do this or show me the mathematical way whice ever thanks Here is a simple probability model for multiple-choice tests. Suppose that a student has probability p of correclty ansering a question chosen at random form...
*January 26, 2010*

**pre calc**

so what will be the solution
*January 25, 2010*

**pre calc**

find delta in each of the following case: tan delta=-0.75
*January 25, 2010*

**pre calc**

express the followinf trig functions in terms of an acute angle. (a) cos 143 degrees (b) tan 192 degrees
*January 25, 2010*

**spanish 2**

Which question is addressed to "usted" (talking to someone with formal respect)? Con quien hablaste? ¿De qué hablaste? ¿Cuánto tiempo estuviste en el teléfono? Que compraste en la tienda? ¿Que hiciste después ¿...
*January 24, 2010*

**biology**

need help If one strand of DNA, had bases ordered ATCCGTC, what would be the bases of its other strand? Compare and contrast mitosis and meiosis as to: number of divisions, number of cells produced, number of chromosomes in parent cells and in gametes.
*January 23, 2010*

**biology**

Need Help with these questions If one strand of DNA, had bases ordered ATCCGTC, what would be the bases of its other strand? Compare and contrast mitosis and meiosis as to: number of divisions, number of cells produced, number of chromosomes in parent cells and in gametes.
*January 22, 2010*

**spanish 2**

I need help to translate these sentences in the past tense. What did you talk about? Did you go to sleep when you got off the phone? How long was you on the phone for?
*January 21, 2010*

**pre calc**

is 270 degreees equal to 3 pi/2
*January 21, 2010*

**pre calc**

so 150 degrees is 5 pi/6 and 180 degrees = pi
*January 21, 2010*

**pre calc**

Convert the following from degrees to radians leave your answer in terms of pi 150 degrees and 180 degrees
*January 21, 2010*

**Physics**

were did this come from this is a momentum problem After some messey algebra it can be said that V_B = (2 m_A V_o_A)/(m_A + m_B) V_A = ( (M_A - M_B ) V_o_A )/(M_A + M_B) were did this come from??? were _B indicates a quantity realtive to B and _A indicates a quantity realitve ...
*January 18, 2010*

**physics**

A mass on the end of a spring is stretched a distance Xo from equilibrium and released. At what distance form equilbrium will it have (a) velocity equal to half its maximum velocity and (b) acceleratipon equal to half its maximum acceleration ? I understand (b) that's just...
*January 18, 2010*

**physics**

well know it's posting it twice :O
*January 18, 2010*

**physics**

ok i'm putting in physics it'll most likely change it watch A fisherman's scale stretches 2.8 cm when a 3.7-kg fish hangs from it. (a) What is the spring constant? (b) What will be the amplitude and frequency of vibration fi the fish is pulled down 2.5 cm more and ...
*January 18, 2010*

**physics**

A fisherman's scale stretches 2.8 cm when a 3.7-kg fish hangs from it. (a) What is the spring constant? (b) What will be the amplitude and frequency of vibration fi the fish is pulled down 2.5 cm more and released so that it vibrates up and down? I have a question about ...
*January 18, 2010*

**physics**

i did for some reason it changes it
*January 18, 2010*

**jishka**

A fisherman's scale stretches 2.8 cm when a 3.7-kg fish hangs from it. (a) What is the spring constant? (b) What will be the amplitude and frequency of vibration fi the fish is pulled down 2.5 cm more and released so that it vibrates up and down? I have a question about ...
*January 18, 2010*

**algebra**

so what are the 2 numbers
*January 15, 2010*

**algebra**

One number is 4 times and then positive number. The sum of the two numbers is 620. Find the two numbers.
*January 15, 2010*

**PreCalculus**

post answer in this question so that way i don't have to search h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 3 4 9 4 6 3 7
*January 14, 2010*

**geometry**

Find the other endpoint of a line segment with the given midpoint and one endpoint. Endpoint: ( 6, -1); Midpoint:(15/2,2
*January 14, 2010*

**Algebra**

Can someone help me with this question. I thought it was quadratic but now I am not sure. State whether the equation represents a linear, quadratic, exponential function or none of the above. x^2+ 6 = -8 x
*January 14, 2010*

**spanish 2**

can you check these Ella gustar bailar yo gustar bailar nosotros gustar bailar Ellos gustar bailar
*January 12, 2010*

**spanish 2**

How do you say She like to dance. in these forms yo you you spoke (formal) = usted (el,ella) we they
*January 12, 2010*

**Physics (algebra bit)**

supposively the ansswer is 9.9 m/s and 4.9 m/s i do not see how to get these solutions
*January 11, 2010*

**Physics (algebra bit)**

I do not see how to do this problem One car has twice the mass of a second car, but only half a smuch kinetic energy. when both cars increase their speads by 7.0 m/s, they then have the sam kinetic energy. What were the original speeds of the cars?
*January 11, 2010*

**algebra**

what is the key sequence you would use on your calculator to solve 4x - 17 = 83
*January 11, 2010*

**Algebra**

Is this relationship linear? Tell how you decided. Write the equation for each linear relationship. X 1, 2, 5, 8, 10, 11 Y 1.5, 2.5, 5.5, 8.5, 10.5, 11.5
*January 11, 2010*

**Algebra**

I'm wanting to take the arctan of this by the way can i simplify this or express this into more simpler terms
*January 10, 2010*

**spanish**

what is the verb ending for the following verbos: llevar ganar caminar montar
*January 10, 2010*

**algebra**

how would I write an equation for the following linear relationships: (x5,y20),(x10,y30)(x15,y40)(x20,y50)(x25,y50)(x30,y50)
*January 8, 2010*

**Algebra**

The Political Noise Problem. The amount of background noise is important to television news reporters. One station developed the formula N=-t^2+12t+54 showing the noise level in decibels (N) as it relates to the time after the speaker stops talking in seconds (t). How many ...
*January 8, 2010*

**algebra**

The Political Noise Problem. The amount of background noise is important to television news reporters. One station developed the formula N = -r^ + 12t + 54 showing the noise level in decibels (N) as it relates to the time after the speaker stops talking in seconds (t). How ...
*January 8, 2010*

**algebra**

how would I write an equation for the following linear relationships: (x5,y20),(x10,y30)(x15,y40)(x20,y50)(x25,y50)(x30,y50)
*January 8, 2010*

**english**

3. going 4. give
*January 7, 2010*

**english**

3. going to 4. give you
*January 7, 2010*

**english**

3. going to the Gallery 4. give you the assignment?
*January 7, 2010*

**english**

Write down the COMPLETE VERB(s) in each of the following sentences. 1. She had been going to the mall. 2. The class seems to be learning! 3. We might be going to the Gallery later. 4. Did I not give you the assignment? 5. Did I not give you the assignment?
*January 7, 2010*

**algebra**

look at that like a fractiion byy the waay!!
*January 7, 2010*

**algebra**

5 6 - x - = 30 10 21 21 -- -> -- 441 147 there you go(:
*January 7, 2010*

**math**

a man has 6 houses, in each house he has 6 cats, Each cat has 6 whiskers on each whisker sits 6 fleas. How many in all?
*January 7, 2010*

**Physics**

If I wanted to right SIGMA F = ma in the proper notation what would I put above and below SIGMA Would I put a lower case "n" above SIGMA and "i = 0" below it and then put a subscript "i" under the "F" thank you I have been woundering ...
*January 6, 2010*

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