Wednesday

July 30, 2014

July 30, 2014

Number of results: 74,002

**Check my physics**

Would you mind checking one of my problems from my physics study guide? I know the answer and just want to make sure I am using the right formula. :) A 78-kg skydiver has a speed of 62 m/s at an altitude of 870 m above the ground. a. Determine the kinetic energy possessed by ...
*March 7, 2013 by Anna *

**Physics (Formula)**

I just need the formula. A 2.5 kg object is whirled in a vertical circle whose radius is 0.89 m. If the time of one revolution is 0.94 s, the magnitude of the tension in the string (assuming uniform speed) when it is at the top is
*February 13, 2013 by Eve*

**its physics.. i just want the formula**

A boy on a 2.2 kg skateboard initially at rest tosses a(n) 7.7 kg jug of water in the forward direction. If the jug has a speed of 2.9 m/s relative to the ground and the boy and skateboard move in the opposite direction at 0.57 m/s, find the boy’s mass. Answer in units of kg (...
*January 17, 2013 by Rah_rAh*

**math and physics**

i just want to know form where i got on this formula the 4.9t² on this formula s=4.9t²+Vot+h because the book only say that a physics theory shows that when an object is thrown upward with an initial velocity Vo, its approximate height is given by that quadratic function i ...
*October 24, 2008 by steve Alexander*

**Physics-Please help with formula**

If I have an electric field around a charged object that is 2.95 x 10^6 N/C at a distance of 0.400m, how would I find the charge on the object? If you could just direct me with a formula-then I'll do it and check back with my answer-Thank you for you help
*February 25, 2011 by Shiela*

**Math**

For each geometric series, calculate t6 and S6. a) 6 + 30 + 150 ... So I'm not exactly looking for an answer to this question but I was wondering why they want you to find t6 too? Would finding out t6 (via general formula) help in any way when finding S6? I'm not trying to ...
*January 12, 2013 by Crystal*

**Physics**

A ball is thrown from ground level up in the air at 61m/s. How fast is the ball going 1s after being thrown. This problem wants you to use the formula v = (-1/2)gt^2 + v_0 g=9.8m/s^2 and v_0 = 61m/s so v = (-1/2)g*(1s)^2 + 61m/s at t = 1. I wrote the formula wrong. It should ...
*September 14, 2006 by Jennifer*

**accounting**

How do I set this problem up to do it? I do not want the answer just the formula. The question is for Present Value, Future Value, and Annuity Due: . Your uncle offers you a choice of $30,000 in 50 years or $95 today. If money is discounted at 12 percent, which should you ...
*July 20, 2009 by Momof8*

**chemistry**

why is the molecular formula of oide of arsenic in its gaseous state is not neccessarialy the same as its empirical formula what does this mean and how do i do it Molecules are known to dimerize or trimerize. We actually don't know what the molecular formula is until we ...
*January 30, 2007 by donald*

**Physics**

A 700# rock sits atop a 150 foot cliff. 1) If it is pushed off how much kinetic energy is in the rock just before it hits the ground? 2) How much potential energy does it have just before it hits the ground? On 2 will I use the mgh formula? If so what height do I use? On 1 , I...
*September 22, 2012 by Uris*

**Physics (Formula)**

A string requires a 191.0 N force in order to break. A 1.75 kg mass is tied to this string and whirled in a vertical circle with a radius of 1.92 m. The maximum speed that this mass can be whirled without breaking the string is Again I just need the formula!
*February 13, 2013 by Eve*

**Physics**

Here, I am dealing with a Science formula for momentum. The formula is: M= mv So, I have: m= 10 grams (.01 Kilograms) v= 5,000 centimeters a second (50 m/s) It says to Find M and also solve the formula for M. Please help!
*June 8, 2010 by Amal*

**Physics**

Here, I am dealing with a Science formula for momentum. The formula is: M= mv So, I have: m= 10 grams (.01 Kilograms) v= 5,000 centimeters a second (50 m/s) It says to Find M and also solve the formula for M. Please help!
*June 8, 2010 by Amal*

**Finding a Formula, help please !**

Does anyone know the formula to find any point between two other given points in a line? Please, and thank you! The mindpoint formula xm= _(x1 + x2) /2 ym = (y1 + y2) /2 This give the midpoint (xm, ym) between the points x1,y1 and x2,y2 Thanks for the tip, but I was wondering ...
*January 14, 2007 by Paris*

**physics**

Using that velocity, and the information from above, compare the total momentum just before the collision with the total momentum after the collision. (again let the masses of the balls be m) , it is a lab question , i was just wondering what formula to use for the momentum
*June 7, 2014 by grey*

**Chemistry**

the formula H2O2 is an example of 1.molecular formula 2. an empirical formula 3.an ionic formula 4.an organic formula
*November 28, 2010 by tia*

**Physics**

I have to find the eccentricity of an elliptical orbit with one focus, earth's center, E. I know the formula to find eccentricity is sqrt(1-)(b^2/a^2), but I don't know where to use the radius or if I need it. Do I just need to use the eccentricity formula to find it? 0<E&...
*April 22, 2008 by Thomas*

**Calc-Sequence**

Find a formula for 1/2, -1/4, 1/6, -1/8, 1/10... So I know that the sequence is just adding 2 to the bottom but i dont know how to write it with a formula including n's..im stuck
*April 21, 2008 by Paul*

**algebta 2**

To find the nth term of an arithmetic sequence the formula given is a(sub n) = a (sub 1) + (n-1)d. Why is (n-1) a part of the formula? Why isn't just n?
*April 27, 2010 by Kevin*

**Physics**

What is the wavelength of a radar signal that has a frequency of 30 GHz? The speed of light is 3 × 10^8 m/s. Answer in units of m Giving me the formula is just fine
*April 1, 2012 by angel*

**math (cant figure it out)**

How to find the surface area of a cylinder with a diameter of 6ft and a height of 20cm using 3.14 rounded to the nearest whole number. (I cant figure it out my book doesn't give an example of it just a radius formula and ive tried searching the formula but i cant find any ...
*March 15, 2014 by luna*

**PHYSICS - Waves**

Can someone tell me how to get the answer to this question? Just a formula would be great. It's on my physics study guide for my unit test. If 3 sound waves pass a microphone in 4.0 s while traveling 5.0 m/s, what is the wavelength of the waves? (6.67 m)
*April 9, 2013 by Diana*

**Chemistry**

Can someone just check this one for me? The neutralization reaction between Al(OH)3 and HNO3 produces a salt with the formula Al(NO3)3 + H2O Yes and no. It DOES produce a salt and that salt is Al(NO3)3 with the formula you have. However, the H2O, although a part of the ...
*February 25, 2007 by Kellie*

**physics**

Using the data from Step #3 and the velocity found above, compare the gravitational potential energy of the ball at the top of the incline, with the kinetic energy of the ball just before it leaves the table. (you do not need to know the mass, just let it equal m). Is ...
*June 6, 2014 by grey*

**Physics**

Suppose a straight 1.25 mm diameter copper wire could just "float" horizontally in air because of the force of the Earth's magnetic field B, which is horizontal, perpendicular to the wire, and of magnitude 5.00 multiplied by 10-5 T. What current would the wire carry? I want to...
*February 10, 2011 by Justin*

**Help...pHysics**

a ball is thrown at 15m/s at an angle of 30 degrees to the horizontal , how far does it travel horizontally before making contact with the ground? I don't remember very well, but I believe the formula you need is: x0 = -.5at^2 + vt + x where x0 is the initial distance (a.k.a...
*October 7, 2006 by sean*

**Physics**

A hypothetical spherical planet consists entirely of iron (p=7860 kg/m^3). Calclate the period of a satellite that orbits just above its surface. I started out with the density formula P=M/V, but i kept subbing in other formulas, but i get stuck..can someone help me? thanks. I...
*March 3, 2010 by ALan*

**Physics**

a bowling ball is thrown down from the top of a building at 20 m/s. Find the distance the ball travels in A) 1 s B) 3 s should I make the 20 m/s negative? I'm assuming the ball is just being thrown stright down... I'm using the formula d=V(initial)*t+1/2a*t^2 I'm getting -24.9...
*February 3, 2009 by Bex*

**math derivative please help**

the derivative of 2x^e is zero right or no? do i have to use the log formula 2 x^e is x to the power 2.718.. It is not a constant and therefore the derivative is not zero. Use the formula for the derivative of x to a power that is constant (x^a). The formula for that may ...
*September 24, 2006 by Anonymous*

**Chemistry**

Calculate the empirical formula and molecular formula of a compound that contains only carbon, oxygen and hydrogen and has a molecular mass of approximately 90. g/mol. Upon combustion of 12.0g of the compund with an excess of oxygen, the yield was 1.2 g of water and 5.87 of ...
*April 22, 2010 by Anonymous*

**PHYSICS - Waves**

Can someone tell me how to get the answer to this question? Just a formula would be great. It's on my physics study guide for my unit test. Sound waves with a wavelength of 2.5 m are traveling 7.5 m/s. How many waves will pass a microphone in 10.0 s? (Answer 30 waves)
*April 9, 2013 by Diana*

**Math**

Use the quadratic formula to solve each of the following quadratic equations... 1. 2x^2-5x=3 2. 3x^2-2x+1=0 Rearrange the equation in quadratic formula form. 2x^2 -5x -3 = 0 Then use the formula. Tell me what you don't understand about it if you don't know what to do next. I ...
*June 13, 2007 by Tomika*

**AP Physics**

Hello I was trying to find the proof of the formula x = x0 + v0t +.5at^2 were the zeros are subscripts My text book dosen't explain it that well. ok well it involves the formula for average velocity aver velocity = 2^-1(v0 + v) were the zero is a subscript and this is just ...
*June 13, 2009 by AP Physics*

**PHYSICS - Waves**

Can someone tell me how to get the answer to this question? Just a formula would be great. It's on my physics study guide for my unit test. It takes 2.30 s for an echo to come back from a sound wave sent to the bottom of a 25 degree C lake. How deep is the lake at this ...
*April 9, 2013 by Diana*

**CAN SOMEBODY PLS GIVE ME THE FORMULA FOR THIS!!???**

google is being a pain right now so i cant find a simple answer, its giving me all these complex examples instead I JUST NEED THE FORMULA FOR FINDING THE LATERAL AREA OF A SQUARE PYRAMID. THAT'S ALL. thank you.....
*February 26, 2014 by TTR+S<3 *

**physics**

At what speed do you approach your image if you walk towards a plane mirror at 1 m/s ? I am not looking for this to be answered for me. I am just looking for how to figure it out. Is there a specific formula to use?
*January 30, 2012 by Jonathon*

**physics**

At what speed do you approach your image if you walk towards a plane mirror at 1 m/s ? I am not looking for this to be answered for me. I am just looking for how to figure it out. Is there a specific formula to use?
*January 30, 2012 by Jonathon*

**physics**

At what speed do you approach your image if you walk towards a plane mirror at 1 m/s ? I am not looking for this to be answered for me. I am just looking for how to figure it out. Is there a specific formula to use?
*January 30, 2012 by Jonathon*

**Software - Excel**

Hi, Im doing my maths coursework andI need to type in a formula and press enter and then I need "FILL DOWN (CTRL D)". How do I do this? I dont want to get the same number from what Ive alreay typed in on the previous cell, I just want that formula to function in the rest of ...
*September 27, 2010 by Brogan*

**Physics**

You plan to build a large, cheap cyclotron using the Earth's magnetic fields(1x10^-4 T) and orbiting just above the Earth's atmosphere (radius 5.7 x10 ^6 m) What energy, in volts, should protons be given to just circle the earth? q= 1.6 x10^-19 C, m= 1.67x10^-27 1 have used ...
*April 8, 2008 by Sandhya*

**algebra**

how would i work out the following problems solve each formula in terms of the given variable 1. 5d-2g=9 ;g The formula A=2h(l+w) gives the lateral area a of a rectangular solids with length l, width,w and height h. 2. solve this formula for h 3. solve this formula for l The ...
*September 22, 2008 by jessica*

**Physics**

I need some help getting a formula. I remember in class u get this really wierd looking equation like Vicosg-((vsin(pheta))/2g) I think this is what the equatin is when I'm asked to "Derive a formula for the Range of a projectile based on Vi and the Launch angle, pheta. State ...
*December 8, 2008 by Physics*

**physics**

I need some help getting a formula. I remember in class u get this really wierd looking equation like Vicosg-((vsin(pheta))/2g) I think this is what the equatin is when I'm asked to "Derive a formula for the Range of a projectile based on Vi and the Launch angle, pheta. State ...
*December 8, 2008 by Physics*

**Physics**

a dentists drill starts from rest. after 5.39 seconds of constant angular accleration, it is rotating at a rate of 2.85E4 rpm. through what angle did it rotate in the process? (i just dont know what formula to use)
*September 20, 2007 by matt*

**Physics E=mc^2**

Can you explain what formula (like quadrantic..whatever formula) and what is it for. The equation E=mc^2. Thanx!
*March 29, 2009 by John*

**physics**

you are given the formula d=30-q. use it to find a formula for q using d.
*April 7, 2011 by Anonymous*

**math formula?**

Based on an average cost per year to attend a university or college of your choice, how much should be invested each month to obtain the goal of that amount (the goal is 40,000$)? Assume 6%/a compounded monthly for 5 years. I don't need the answer, just the formula please!
*January 20, 2011 by Haley*

**Algebra**

can show me how to do this with out just squaring 3x^(1/2) - x - 6 = 0 how do i do this and solve for x with out just squareing and using quadratic formula. I was never taught the proof of the quadratic formula and would like to know how to do with without squareing and if ...
*May 27, 2009 by Algebra*

**Physics**

A 2.5 kg object is whirled in a vertical circle whose radius is 0.89 m. If the time of one revolution is 0.94 s, the magnitude of the tension in the string (assuming uniform speed) when it is at the top is I just need the formula and it doesn't even have to be manipulated.
*February 13, 2013 by Eve*

**physics**

What is the general formula for energy?When asked to write formula for energy in general without specifying kinetic or potential or work can we write eienstien's e=mc2 formula?
*September 22, 2012 by J.Nandhini*

**physics, **

A 4.0kg object is supported by an aluminum wire of length 2.5 m and diameter 1.8 mm How much will the wire stretch? I need the breakdown of how this is being solved so I can figure it out in the future. Even just a formula will do
*April 12, 2011 by Dorian*

**Physics(Please help)**

1) The velocity of a diver just before hitting the water is -11.8 m/s, where the minus sign indicates that her motion is directly downward. What is her displacement during the last 1.06 s of the dive? I know that the formula for displacement is deltaX= x - x0. Would I do -11.8...
*May 27, 2012 by Hannah*

**Physics**

A woman driving her car approaches an intersection and begins to accelerate just as the traffic light turns green. Her velocity is the function of time described by the equation: v(t)=2t^2-8t+10 (A) Use calculus to find her instantaneous acceleration at t=8.0seconds (B) Use ...
*June 11, 2012 by Genny*

**Calculus**

Posted by Aletha on Sunday, March 18, 2007 at 6:51pm. After t hours of an 8-hour trip the distance a car travels is modeled by: D(t)= 10t + (5)/(1+t) - 5 where D(t) is measured in meters. a) derive a formula for the velocity of the car. b) how fast is the car moving at 6 hours...
*March 18, 2007 by Aletha*

**Physics**

The mass of the object was 8 kilograms. The object was acted on by a foce of 20 angle 80degrees newtons. What was the acceleration of the object? Please walk me through the steps instead of just suggesting a formula.. Thank you!
*June 11, 2012 by Genny*

**math**

Q. Naomi has a formula that allows her to convert Clesius temperatures to Farenheit temperatures. She needs a formula for converting Fahrenheit temperatures to Celsius tempertures. What advice can you give her? I am thinking that I just reverse the preocess of the first ...
*January 24, 2007 by catalina*

**Physics**

The liquid in the tube has a density of 1.48 g/cm^3 . The atmospheric pressure is 1.013 X 10^5 newtons per square meter. What is the pressure P in the container? Please walk me through your steps, don't just suggest a formula. Thank you very much.
*June 11, 2012 by Jen*

**accounting-explain**

Create a table comparing the gross profit for this product’s sales for the month of June under each of the two formulas (1) FIFO and (2) average. Calculate the gross profit margin under each formula. Can you please help me wiht this question. just explain the questions. i just...
*July 30, 2010 by thara*

**Physics**

A hypothetical spherical planet consists entirely of iron (p=7860 kg/m^3). Calclate the period of a satellite that orbits just above its surface. I started out with the pressure formula P=M/V, but i kept subbing in other formulas, but i get stuck..can someone help me? thanks.
*March 2, 2010 by ALan*

**Physics **

A mass m is traveling at an initial speed of v0 = 25.0 m/s. It is brought to rest in a distance of 62.5 m by a force of 15.0 N. The mass is? Could you just enlighten me on what formula to use please.... little lost although I think the answer is 37.5kg am I anywhere close?
*February 13, 2011 by Femfatal*

**physics**

Two sounds, one of 200 Hz and one of 194 Hz occur at the same time. What beat frequency do you hear? Show your calculations I'm not looking for someone to do my homework for me. I just don't know what formula to use to figure it out.
*January 25, 2012 by Bethany*

**Physics**

The question said find the speed of sound at a certain temperature. What formula would you use? Could someone tell me the formula so I could do the questions that correspond.
*February 25, 2009 by Lena*

**Calculus**

Hello...i just had a quick question...its probably something easy to get...maybe i am thiking too hard...but the question is estimate the volume of solid that likes above the square R=[0,2] * [0,2] and below the elliptical paraboloid z=16-x^2-2y^2..divide r into four equal ...
*November 5, 2007 by Kim*

**Physics, help please!**

A hypothetical spherical planet consists entirely of iron (p=7860 kg/m^3). Calclate the period of a satellite that orbits just above its surface. I started out with the pressure formula P=M/V, but i kept subbing in other formulas, but i get stuck..can someone help me? thanks.
*March 2, 2010 by ALan*

**Chemistry**

What acid and what strong base would react in aqueous solution to produce the following salts in the formula equation? Write the balanced formula equation for each reaction. a) potassium perchlorate b) cesium nitrate c) calcium iodide I don't need just the answers, I'm ...
*December 28, 2011 by Steven*

**physics**

how large a force is required to accelerate a 1300 kg car from rest to a speed of 20 m/s in a horizontal distance of 80 m ? I'm trying to find the formula and then plug in the correct #'s into the formula.
*February 11, 2010 by courtland*

**Physics**

A 390 kg motor boat, moving down a frictionless ramp, is connected over a massless pulley to a 193 kg counterweight that rests on a horizontal surface. The ramp is inclined by 28.6°, and the co-efficient of kinetic friction between the couterweight and the horizontal surface ...
*January 25, 2011 by Josh*

**Physics**

"Luke Skywalker mixes 250g of hot water (75 deg C) with 500g of cool water (15 deg C). What is the final temperature of the water?" If someone could just give me a formula, I'd be fine. :)
*October 4, 2008 by Jen*

**Pre-Algebra**

Please help to solve to find x,y 1. y=7x-3 2. 4x+2y=8 Take the value of y in the first formula and substitute it for y in the second formula. Solve the second formula for x. Once x is found, solve for y in the second formula. Check by inserting both values into the first ...
*May 18, 2007 by Lee*

**chem**

could anyone tell me why the molecular formula of agas is not always the same as the empirical formula tnx It may be a dimer or a trimer. For example, CH is the empirical formula for acetylene but the molecular formula is HC(triple bond)CH or C2H2.
*February 3, 2007 by bex*

**Physics**

Find the magnitude of the gravitational attraction force that the earth exerts on a 62-kilogram astronaut who is 8.00 X 10^7 meters away from the center of the earth. Useful numbers: M^earth=5.98 X 10^24kg; G=6.67 X 10^-11 N*m^2kg^-2 Please walk me through your steps, don't ...
*June 11, 2012 by Jen*

**chemistry**

A 2.000g sample of magnesium was burned in air to form an oxide. After the product was purified it was found to have a mass of 3.317g. What is the empirical formula for the product? I know how to find a empirical formula, I just don't understand what masses I am supposed to ...
*October 29, 2009 by Tatiana*

**pHYSICS**

iTS A HARD QUESTION. wHAT IS THE FORMULA FOR SPEED? sOLVE TWO SPEED PROBLEMS WITH A DIFFERENT MISSING PART OF THE FORMULA.
*November 15, 2008 by fahad*

**physics help!!!**

How do you find the speed of sound wave using the formula for speed when you have 195 Hz 89.4m in 0.311s. Help what formula to use what's the answer???
*February 7, 2012 by lili-chan*

**Physics**

Why is sin theta used in the torque formula while the work formula uses cosine theta?
*March 24, 2010 by Morgan*

**Math**

I have some problems that I dont understand. Please help me. Solve the formula for the specified variable. s=2ðrh + 2ðr^2 for h f= (9/5)c+32 for c A=P(1+nr) for r for H i don't know what that notation is so I'll leave that alone and maybe someone else can help you with that ...
*August 18, 2007 by Samantha*

**visual**

I need some explanation about fonts and how to use them. Need to complete an assignement requesting that fonts are used for shpwing contrast in 7 dimensions. My problem is tht I don't know how to determine the size of the letters by using a formula. I could measure each letter...
*October 7, 2008 by Lillian*

**Physics**

Please help- A small fish is dropped by a pelican that is rising steadily at 0.50 m/s. How far below the pelican is the fish after 2.5 s? Answers. 61m 29.3 30.6 1.1m I just started school and I'm totally lost-If someone could explain formula to me I'd really appreaciate it ...
*September 5, 2010 by Melinda*

**Physics**

I have a forumla question. I have this formula x=1/2t^2. Is this the formula to find the acceleration that is caused by gravity?
*September 3, 2007 by Soly*

**Chemistry Check**

the title of this worksheet is Ternary Nomenclature: Acids and Salts I just want to make sure that this is right: Name of Acid: hydrobromic acid Formula of Acid: HBr Name of Anion: bromide I think it is because I googled these. But, just in case...
*June 22, 2010 by Amy~*

**Math Formula Part 2/3**

I've done the second part to the Math Formula post. It was determine the 19th term of the sequence which I did. Now it says..which of the numbers -268 and -350 are terms of the sequence? I was doing something like this: tn = -7 (-268) +19 I was plugging -268 as n. But that ...
*September 13, 2011 by Anonymous*

**chemistry**

why is the formula written for an ionic compound such as NaCl the empirical formula,rather than a molecular formula?
*April 27, 2008 by caleb*

**Chemistry**

What molecular formula can you deduce from a mass spectrometry of 156 m/z. And how do you get that formula? Steps on how to get the formula is much appreciated! Thanks!
*November 12, 2013 by Fred*

**chemistry**

If a compound's empirical formula is CH2O and its' formula mass is 120.12 amu, what is its' molecular formula
*December 13, 2009 by nick*

**Chemistry**

Draw the structure of the product formed by the reaction between methyl alcohol and formic acid and give the molecular formula? I did not understand the answer that you gave me it did not make sense to me and I couldnt find it to respond back im sorry. If you wouldnt mind can ...
*April 17, 2007 by Kellie*

**polynominals**

(6h+1)-(9h+4) don't tell me the answer just give me the formula
*May 13, 2013 by Alex*

**chemistry**

Determining a Molecular Formula from an Empirical Formula 1. A compund has an experimental molar mass of 78g/mol. Its empirical formula is CH. What is its molecular formula?
*March 24, 2009 by jaz*

**chemistry**

Determining a Molecular Formula from an Empirical Formula 1. A compund has an experimental molar mass of 78g/mol. Its empirical formula is CH. What is its molecular formula?
*March 24, 2009 by chrissy*

**Algebra**

I have two problems that I am not sure about how to work out. 1. The distance traveled by a falling object is given by the formula d=4.9t^2, where d is in meters and t is in seconds. Solve the formula for t. 2.The volume of a right circular cone is given by the formula V=1/3(...
*March 31, 2008 by FCH*

**ALGEBRA**

I have two problems that I am not sure about how to work out. 1. The distance traveled by a falling object is given by the formula d=4.9t^2, where d is in meters and t is in seconds. Solve the formula for t. 2.The volume of a right circular cone is given by the formula V=1/3(...
*March 31, 2008 by Casey*

**math 213**

The effect of depreciation can be computed using a formula similar to the formula for compound interest. a. Assume depreciation is the same each month. Write a problem involving depreciation and solve it. b. Develop a general formula for depreciation defining what each ...
*April 19, 2010 by billy bob*

**Physics**

I came here earlier with this question: "A force of 20 N acts toward the west. Another force acts at the same point so that the resultant of the two forces is zero. What is the magnitude and direction of the second force?" I was wondering if someone could explain to me how to ...
*March 5, 2013 by Shelby*

**AP Chemistry**

The structural formula for acetic acid is CH3CO2H. What is its empirical formula; what is its molecular formula?
*September 26, 2011 by Ceasar*

**Physics**

I'm haivng troulbe proving the deriviation of this formula on my own... could you please help me derive the proof of the formula or maybe show me one thansk... I need to prove this formula period of a mass spring system in simple harmonic motion T = 2 pi square root of (m/k) ...
*May 30, 2009 by Kim*

**math**

can anyone help please, i need a simple formula for working out taxes.if i had any number i need to know what the base was before 16% tax was added. i know the formula if the tax was 17.5%,what ever the total is if you divide that by 47 then x that by 7 that will give you the ...
*April 15, 2007 by simon*

**Chemistry**

Please check my answers for the following questions. THANK YOU. 1) The empirical formula of a compound that is 25.9% nitrogen and 74.1% oxygen is.... ANSWER: N2O 2) empirical formula of a compound that consists of 4.80 grams of carbon, 1.20 grams of hydrogen, and 2.80 grams of...
*August 2, 2007 by anonymous*

**Algebra**

Celsius temperature readings can be converted to Fahrenheit readings using formula F=9/5c+32 What is the fahrenheit temp. that corresponds to each of the following Celsius temperatures -10, 0, 15, 1000? I will be happy to critique your work on this. You have the formula, just ...
*September 16, 2006 by Jean*

**math,algebra**

can someone help me out factor out this 0=16t^2-122t+180 i have so far this but the last one i am not sure 8(2t^2-14t + ?) you need to use the quadratic formula: -b(+or-)[sqrt(b^2-4ac)/2a] so you are saying that i don't have to factor it out any further i can just continue to ...
*April 6, 2007 by jasmin20*

**PHYSICS - formula?**

Here is one of my questions from my physics study. It tells me the answer (35 J), but how do I find that answer? I would appreciate a formula or step by step calculation. Thanks! :) A 30 kg kid on rollerskates is moving 1 m/s. His brother pushes him with a force of 5 N. What ...
*March 26, 2013 by Anna*

**physics**

A 25 kg object accelerates from rest to a 0.45 m/s in 1.3 seconds. If the coefficient of friction between the object and the floor is 0.15. Find the force that can accelerate it. I don't know how to derieve the formula for this one..please help.. FROM the FORMULA: -netF=Ff-Fx
*October 14, 2009 by Shane*

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