Wednesday

April 23, 2014

April 23, 2014

Number of results: 24,823

**Science**

Starting from rest, a boulder rolls down a hill with constant acceleration and travels 3.00 during the first second. How far does it travel during the second second? How fast is it moving at the end of the first second? How fast is it moving at the end of the second second? If...
*Tuesday, September 19, 2006 at 6:05pm by Morgan*

**Physical Science**

An object travels 6m in the first second of travel, 6m again durning the second second of travel, and 6m again druning the third second. It acceleration in meters per second per second(M/S2) is
*Sunday, October 25, 2009 at 1:20pm by Caitlyn*

**physics**

You can either use a formula or construct a table. You should get the same answer. If the falling object drops 2.65 feet the first second, the value of the accleration of gravity there is g' = 5.3 ft/s^2. In t = 10 seconds, use the formula Y = (g'/2)*t^2, with g' = 5.3 ft/s^2 ...
*Thursday, July 26, 2012 at 5:26pm by drwls*

**Math**

Need help on factoring. HOw exactly would I solve these(big test coming up): -3x to the second+18x+12 -5x to the second-13x=6 -5x to the second-6x_1 -and xto the second + 6x=10 Thanks.
*Thursday, May 15, 2008 at 9:49am by John*

**physics**

A bicyclist moving at a constant speed takes 10.0 seconds to travel 500 meters down a path inclined 30.0° downward from the horizontal. What is the vertical velocity of this motion?Select one of the options below as your answer: A. 18.3 meters/second B. 43.3 meters/second C. ...
*Friday, May 25, 2012 at 11:47am by Anonymous*

**Science 6th grade**

If an object's velocity changes from 2 meters per second to 6 meters per second in five seconds, its acceleration is calculated as follows:- 6-2)/20 = 80m per second per second or or 80m per second squared (m/s2)
*Sunday, October 16, 2011 at 9:29am by Trissy*

**Science**

An object travels 8 m in the 1st second of travel, 8 m again in the 2nd second of travel, and 8 m again during the 3rd second of travel. its acceleration in meters per second per second is? Would the answer to this question be 0? I'm not positive, but wouldn't the acceleration...
*Thursday, March 8, 2007 at 4:18pm by Anonymous*

**Math - PreCalc (12th Grade)**

If the distance covered by an object in time t is given by s(t) = 2t2 + 3t, where s(t) is in meters and t is in seconds, what is the average velocity over the interval from 2 seconds to 4 seconds? A) 15 meters/second B) 14 meters/second C) 13 meters/second D) 12 meters/second ...
*Friday, March 21, 2014 at 12:01pm by Shawna*

**physics**

distanceat end of fourth second= 1/2 g (4)^2 distanceatendofFifth second= 1/2 g 5^2 distancein fifth second= 1/2 g (25-16)
*Saturday, August 29, 2009 at 12:33am by bobpursley*

**Pre Calculus**

If you are riding on a Ferris wheel that is 60 feet tall and it takes 5 minutes to make a one revolution, what is your linear velocity? A. 0.62 feet per second B. 0.31 feet per second C. 37.68 feet per second D. 3.14 feet per second E. 9.42 feet per second
*Monday, April 22, 2013 at 9:35pm by Deontre*

**Physics**

X(t)= (a/2) t^2 8 = (a/2)*2^2 = 2a a = 4 m/s^2 After 3 seconds, the distance travelled from the starting point is X(3) = 2*3^2 = 18 m 18 - 8 = 10 m was covered in the third second. First second: deltaX = X(1) = 2 m Second second: deltaX = X(2)-X(1) = 6 m Third second: deltaX= ...
*Tuesday, March 27, 2012 at 5:34am by drwls*

**Physics**

Average velocity in first second = g/2 = 4.9 m/s Average velocity in 2nd second = 3g/2 = 14.7 m/s Average velocity in 3rd second = 5g/2 = 24.5 m/s Average velocity in 4th second = 7g/2 = 34.2 m/s, which is seven times the first second. It takes 4 seconds.
*Monday, June 13, 2011 at 10:43pm by drwls*

**algebra**

I am supposed to correc t the parenthesis in this equation (a+b)second power+ a to the second + b to the second
*Wednesday, September 2, 2009 at 5:16pm by alex*

**Physics **

3. A Truck is pulled by a rope horizontally. The mass of the truck is 200kg and the tension in the rope is 500N. Assuming the initial velocity to be zero, how long will it take the truck to reach a speed of 8m/s. Ignore the friction : a) 2 second b) 4.5 second c) 3.2 second d...
*Tuesday, August 28, 2012 at 10:07am by Maroa,*

**College Math**

The posted speed limit on many U.S. highways is 65 miles per hour. What is this speed in feet per second? My answer was 5720 feet per second. The other answers that would be a possibility are: (A)3600 feet per second, (B)95 1/3 feet per second, (C) 5720 feet per second, which ...
*Tuesday, August 28, 2012 at 5:26pm by Carol*

**physics**

one ball is dropped off a cliff. A second ball is thrown down 1 second later with an initial speen of 40 ft/sec. How long after the second ball is thrown will the second ball overtake the first?.
*Wednesday, May 11, 2011 at 8:43pm by Eric*

**science**

A science student drops a rok down a mine shaft. It takes 3 sec. for the rock to hit the bottom of the shaft , at what speed of the rock just before impact? 32 feet per second per second is the acceleration rate of earth. At the end of second 1 the speed is 32 feet per second...
*Tuesday, October 24, 2006 at 9:43pm by pat*

**RE: Math**

Need help on factoring. HOw exactly would I solve these(big test coming up): -3x to the second+18x+12 -5x to the second-13x=6 -5x to the second-6x=1 -and xto the second + 6x=10 I can't use the quadratic equation. I have to use the a times c method.
*Thursday, May 15, 2008 at 6:13pm by John*

**math**

Below is the rule for calculating the velocity of a falling object. Use this rule to calculate the rate, expressed in feet per second, that a piano, dropped 3 seconds ago, is falling. V(t) = 32t A. 192 feet per second B. 288 feet per second C. 96 feet per second D. 3 feet per ...
*Wednesday, October 10, 2012 at 9:52am by lo*

**math115**

(-3)(-6) + (4)(-2)=10 (-3)to third power- (-8)(-2)=-43 (-6)to second power- 4 to the second power=-20 -9to second power- (-6)second power=117
*Wednesday, October 14, 2009 at 8:22pm by p*

**math115**

(-3)(-6) + (4)(-2)=10 (-3)to third power- (-8)(-2)=-43 (-6)to second power- 4 to the second power=-20 -9to second power- (-6)second power=117
*Wednesday, October 14, 2009 at 8:48pm by p*

**Physics**

A 0.421-kg ball has an elastic, head-on collision with a second ball that is initially at rest. The second ball moves off with half the original speed of the first ball. (a) What is the mass of the second ball? (b) What fraction of the original kinetic energy (ΔK/K) is ...
*Wednesday, June 6, 2012 at 9:04am by James*

**Physics**

Kelly is driving a car with a mass of 800 kilograms in a south direction with a speed of 18 meters/second. Dominic is driving a truck with a mass of 1500 kilograms with a velocity of 15 meters/second to the east. They undergo perfectly inelastic collision. What is the ...
*Wednesday, March 27, 2013 at 10:10am by Fredrick*

**Physics**

rate = meter*meter*meter/seconds x seconds = meter*meter*meter. The second in the denominator of the first part cancels with second in the numerator of the second part. This is just like (meter/second) x second = meter
*Sunday, October 4, 2009 at 4:31pm by DrBob222*

**Chem21**

Rank these gases in order of increasing standard molar entropy: Column preview Smallest S Br2(g) Second smallest S F2(g) Second largest S I2(g) Largest S Cl2(g) Matching pairs Smallest S Second smallest S Second largest S Largest S
*Monday, May 2, 2011 at 11:59pm by Ryan*

**physics**

Oh okay, thank you. The only thing included was a graph giving the points t=0s, speed= 0cm per second; t= .5s, speed= 15cm per second; t=1.1s, speed =28cm per second; t=1.6s, speed=6cm per second.
*Sunday, October 10, 2010 at 12:30am by Amber*

**Trig**

tan(to the second power) s sin(to second power)=tan(to second power + cos(second power) s - 1...I need the steps on how to get it to equal...problem looks like tan2 s sin2 s=tan2 s + cos2 s - 1...thanks if you can figure it out
*Tuesday, February 17, 2009 at 5:53pm by Courtney*

**math**

In first one second it descends 64 m , Next one second it descends =(64-7)=57 m Then next one second it descends = ( 57-7)=50 m, 4th second it descends =50-7=43 m 5th second it descends = 43-7=36 m. 6th second it descends = 36-7=29 m. 7th second it descends = 29- 7= 22 m 8th ...
*Monday, July 25, 2011 at 7:05pm by Anonymous*

**physics**

First I would suggest converting mph to feet/second for both riders. When the second rider passes you, the first rider has been riding for 10 seconds past you. Find that distance (10 seconds * first rider's speed in feet/second). The second rider is catching up to the first ...
*Sunday, October 7, 2007 at 10:56pm by Quidditch*

**Science**

The time taken by the tip of second hand of a clock to move one full round on circular dial is 60 second. The speed of second hand is _____.
*Monday, September 26, 2011 at 11:16am by Rahul*

**Science**

The time taken by the tip of second hand of a clock to move one full round on circular dial is 60 second. The speed of second hand is _____.
*Monday, September 26, 2011 at 11:50am by Rahul*

**Physics**

A ball with a mass of 0.50 kilograms is moving at a speed of 1.8 meters/second along the positive x-axis. It collides with another ball of the same mass travelling at a speed of 2.0 meters/second toward the positive y-axis. Both balls then start moving together. What is the ...
*Wednesday, March 13, 2013 at 10:30am by fredrick*

**math**

The sum of three numbers is 92. The first number is 1/3 of the second, and the second is 2/5 of the third. What is the second number?
*Thursday, October 17, 2013 at 7:28pm by vic*

**math**

The traffic at 3 different road crossing change after 25 second, 36 second, 54 second, it they start change simantously at 9 am .how long it take for the process to repeat again?
*Saturday, June 29, 2013 at 3:37am by ravita*

**English**

Which class are you in? I'm in class 2. What class are you in? I'm in class 2. Which year and which class are you in? I'm in the second year and the second class. What year and what class are you in? I'm in the second year and second class. I'm in the second year, second class...
*Tuesday, March 17, 2009 at 9:14am by John*

**Physics**

A 0.100 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball. (a).what is the mass of the second ball? (b).What fraction of the original kinetic energy (ΔKE/KE) ...
*Sunday, January 2, 2011 at 8:34am by John *

**Intro to comp**

What unit of measure is used to determine the performance of a CPU? (Points: 5) Bits per second Cycles per second Hertz Instructions per second Is it D
*Thursday, December 1, 2011 at 7:08pm by Andy*

**Algebra**

If the left is less than zero, then either the first parenthesis is negative, or the second, but not both. I will do one for you, the first paren negative, second positive. x>5 for second +, x<-3 for the first negative or -3>x>5. You do the second condition
*Tuesday, July 14, 2009 at 8:09pm by bobpursley*

**Algebra- MAT 116**

I need Help with this question: Find the value 0.2y(y to the second power)+ o.3y (y to the second power)-0.1y (y to the second power)
*Monday, May 14, 2012 at 10:42pm by angel*

**physics**

2 ants cross a counter 54cm long, one travels at 16 meters per second, and the other at 3.99999 centimeters per second. when the first crosses the finish line how far behind is the second?
*Tuesday, September 11, 2012 at 9:43pm by Vitaly*

**physics**

2 ants cross a counter 54cm long, one travels at 16 meters per second, and the other at 3.99999 centimeters per second. when the first crosses the finish line how far behind is the second?
*Tuesday, September 11, 2012 at 9:48pm by Vitaly*

**physics**

an 8-newton foce is applied to a 4-kg object. what is the rate of acceleration. a.4 meters per second b.8 meters per second c.2 meters per second d.12 meters per second
*Friday, March 18, 2011 at 6:42am by Gabriella*

**Physics**

What is the momentum of a 1.5 × 103 kilogram van that is moving at a velocity of 32 meters/second? A. 46.9 kilogram meters/second B. 4.7 × 103 kilogram meters/second C. 4.85 × 102 kilogram meters/second D. 4.85 × 104 kilogram meters/second
*Wednesday, March 13, 2013 at 10:23am by fredrick*

**College Chemistry Lab**

Same procedure but on the second run you plug in k from the first run, C from the second run, and calculate A of the second sample.
*Monday, March 15, 2010 at 11:56pm by DrBob222*

**math**

This is like the car problem. At the start, t0, the stone has a speed of zero. t0 = 0 m/s The acceleration is (10 meters per second) per second, so after one second the speed is 10 m/s. t1 = 10m/s After another second, we add on another 10m/s to the speed t2 = 20 m/s At the ...
*Saturday, October 10, 2009 at 6:38pm by jim*

**Physics**

A 0.280 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball. (a) What is the mass of the second ball? (b) What fraction of the original kinetic energy (ΔKE/KE) ...
*Wednesday, November 11, 2009 at 2:12pm by Ashley*

**science**

if a dog runs 6 meters in 1 second and then at the end of the second second the dog ran an additional 4 meters. what would describe the dogs motion in both seconds
*Wednesday, February 9, 2011 at 3:26pm by Anonymous*

**physics**

A person on a diet might lose 1.5 kg per week. Express the mass loss rate in milligrams per second, as if the dieter could sense the second-by-second loss
*Thursday, September 1, 2011 at 8:29pm by jessica*

**Physics**

A person on a diet might lose 1.8 kg per week. Express the mass loss rate in milligrams per second, as if the dieter could sense the second-by-second loss.
*Friday, July 9, 2010 at 8:43am by Anonymous*

**math**

If a television produces a 8ms response time, and there are 1000 ms in one second, how many frames would lag per second is there in a 60 frames per second video game?
*Monday, December 13, 2010 at 7:32pm by Raam*

**9th grade algebra**

Let L stand for the larger and S stand for the smaller. From the second sentence, you know that L = S + 20. From the second sentence, you know 4L = 5S + 70 Substitute S + 20 for L in the second equation. Solve for S. Put value of S in the first equation to solve for L. Check ...
*Wednesday, September 10, 2008 at 8:53pm by PsyDAG*

**physicss**

The squared business means Vivian is walking at 1.3 m/s. When she quickens her pace, the next second she is walking at 1.3 + 0.09 m/s and the next second at 1.3 + 0.09 + 0.09 m/s etc. The m/s^s is read meters per second squared OR you can think of it as meters per second per ...
*Tuesday, September 11, 2007 at 8:20pm by DrBob222*

**algebra 2**

25y to the second power times x to the second power plus 20xy to the second power plus 4x to the second power
*Wednesday, January 6, 2010 at 7:08pm by deondre*

**Mathematics**

If a piece of wood is 5 cm longer than a second piece, and 3/4 of the second piece is equal to 3/5 of the first, what is the length of the second piece? Explain your workings
*Wednesday, November 9, 2011 at 7:10am by Mikie*

**Mathematics**

If a piece of wood is 5 cm longer than a second piece, and 3/4 of the second piece is equal to 3/5 of the first, what is the length of the second piece? Explain your workings
*Wednesday, November 9, 2011 at 6:45am by Kevin*

**Mathematics**

If a piece of wood is 5 cm longer than a second piece, and 3/4 of the second piece is equal to 3/5 of the first, what is the length of the second piece? Explain your workings
*Wednesday, November 9, 2011 at 9:27am by Jessica*

**Physics**

A ball is dropped from rest from a height of 20.0 m. One second later a second ball is thrown vertically downwards. If the two balls arrive on the ground at the same time, what must have been the initial velocity of the second ball?
*Sunday, August 28, 2011 at 2:55am by Anonymous*

**Physics**

What is the algebraic expression for the ratio ac,second/ac,minute of the centripetal accelerations for the tips of the second hand and the minute hand? Express your answer in terms of the periods Tsecond and Tminute. (Answer using T_m to be the period of the second hand and ...
*Friday, April 4, 2008 at 5:30am by Robinson*

**algebra 1**

You distribute. What you do is, multiple the first number from the first bracket with the first number from the second bracket, then the second number from the second bracket and the third number from the second bracket. You then multiple the second number from the first ...
*Thursday, November 15, 2007 at 10:30pm by Anonymous*

**Physics**

"twice each second" means the same thing as 2 per second or 2 Hz. 1 divided by the frequency is the period. If there are two vibration periods in 1 second, how long does it take to have one vibration? 37 cm is twice the amplitude
*Monday, February 9, 2009 at 9:47pm by drwls*

**math**

We start counting when it's moving 103m/s. (And incidentally, that's pretty fast for a car. Formula 1, maybe?) Each second after that, it moves 1m/s faster than it was before. So if we call time by seconds, as we often do in these things, we call the start, after zero seconds...
*Saturday, October 10, 2009 at 6:35pm by jim*

**math**

A runner starts a race at the starting line. A second runner starts at 44 yards. If the first runner moves 7 yards each second and the second runner moves 3 yards each second, at what distance will the first runner catch the second runner?
*Monday, January 14, 2013 at 7:46pm by andre*

**Physics**

A ball is dropped from rest from a height of 20.0m. One second later a second ball is thrown vertically downwards. If the two balls arrive on the ground at the same time, what must have been the initial velocity of the second ball?
*Friday, August 31, 2012 at 3:30pm by Alex*

**Physics**

A ball is dropped from rest from a height of 20.0m. One second later a second ball is thrown vertically downwards. If the two balls arrive on the ground at the same time, what must have been the initial velocity of the second ball?
*Friday, August 31, 2012 at 3:30pm by Alex*

**Physics: Non uniform motion**

find when the last second, on the second question, like at t=10 find the distance it has traveled. Then find the same distnace for t=9. The difference in distances is the distance in the last second.
*Thursday, October 2, 2008 at 1:12pm by bobpursley*

**physics**

An airplane starts from rest at the end of a runway and accelerates at a constant rate. In the first second, the airplane travels 1.11 m. What is the speed of the airplane at the end of the second second?
*Sunday, February 19, 2012 at 12:47pm by suri*

**English**

Wow, that's rough. They're both pretty awful!! The second one is slightly better. It does have a main idea (second sentence), and the other sentences are explaining that one, although not smoothly. The first sentence ... I don't know what to do with that unless it's combined ...
*Friday, May 13, 2011 at 5:10pm by Writeacher*

**physical science**

Speed = metres per second. Acceleration = meters per second, per second Therefore you can use the equation m/s2 to find the acceleration.
*Thursday, April 16, 2009 at 8:54pm by Kara*

**algebra**

if a piece of wood is 2 cm longer than a second piece, and 3/4 of the second piece is equal to 3/5 of the first, what is the length of the second piece?
*Tuesday, November 8, 2011 at 9:51am by Aldwin*

**Trig**

Find the speed in both radians per second and degrees per second for the hour hand, the minute hand, and the second hand on a clock.
*Saturday, January 21, 2012 at 3:49pm by Al B.*

**Geometry**

The sum of four numbers is 771. The ratio of the first to the second is 2:3. The ratio of the second to the third is 5:4. The ratio of the third to the fourth is 5:6. Find the second number.
*Thursday, March 7, 2013 at 6:33pm by greendayangel21guns*

**physics**

because length is proportional to force, the second set of masses must be three times the first, but the second set of masses is .44kg+secondmass, so second mass is twice the first.
*Tuesday, July 16, 2013 at 4:17pm by bobpursley*

**algebra 1**

I cannot find it in my text book I have a math problem : 2f2 + 9f + 6 for f = 10 The second 2 is to the second power. So with the order of operation do I muliply 2 by 10 first and then 20 the the second power? Thanks Math is really killing me!
*Wednesday, June 9, 2010 at 1:59pm by Kati*

**physics**

Is it a really five second interval? You only provide information for a four second interval. I'd need to know what the car did during the last second. Anyway, calculate the vector difference in the car velocities (final minus initial) , and divide the result by the time ...
*Saturday, July 17, 2010 at 11:46am by drwls*

**physics**

A friend is making an iMovie and wants your help designing a skateboard stunt. You estimate that your friend�s mass is four times greater than that of the skateboard. For the following questions, ignore friction. In one scenario, your friend starts by standing at rest ...
*Tuesday, March 11, 2014 at 12:24pm by anonymous*

**Physics: Non uniform motion**

There is another way (calculus differentials) way. find ddistance/dt=vi+at at t=start of last second, then use this as the vi for the tenths second. d=vi+at where t is just one second. I prefer the first way I illustrated.
*Thursday, October 2, 2008 at 1:12pm by bobpursley*

**Intergated chemistry/physics**

A parachute on a dragster racing-car opens and changes the speed of a car from 85 meters/second to 45 meters/second. Of this car is decelerating (slowing down) at a rate of -8.9 meters/ second, how many seconds will this take?
*Wednesday, October 3, 2012 at 10:57am by Laura*

**algebra**

Is the second line supposed to be 7x + y = -8, or 7x - y = -8? You sweem to have inserted a second equal sign by mistake. Whichever it is, use the second equation to derive an equation for y in terms of x. Then substitute that "y" value into the first equation, and it will be ...
*Tuesday, February 12, 2008 at 9:42pm by drwls*

**Physics**

A rocket, 8975 kg, traveling at 1255 m/s East explodes into two pieces. if one piece, 2450 kg, moves at 750.0 m/s due south, what is: the mass of the second piece? the momentum of the second piece? the velocity of the second piece?
*Thursday, October 27, 2011 at 10:07pm by Jessica*

**algebra 2**

one number is two less than a second number. If you take one-half of the first number and increase it by the second number,the result is atleast 41. find the least possible value for the second number.
*Thursday, December 2, 2010 at 9:29am by Anonymous*

**math, physics**

a. If dm/dt is kg/second, then kg/second= ? * P= ?*nt/m^2 or ? has units of kg*m^2/Ns but N is kg*m/s^2 or ?= kg*m^2/(kg*m/s^2 * s) ?= second/meter
*Thursday, October 6, 2011 at 2:47am by bobpursley*

**math!**

yes. Now, you need the second derivative, which in this cae is 6x. So, at the first "critical point,-1.4, the second derivative is negative, so at that point, so it is a maximum. At the second point 1.4, the second derivative is positive, so the graph is a relative minumum ...
*Thursday, October 23, 2008 at 6:19pm by DanH*

**Substution Soluton MATH**

1. subtituting we get -5x + 2 = 3x-14 so we get 8x = 16 and x=2, then plugging back in we get y = 2*-5 + 2 = -8 2. subtracting first from second equation gives us 4x = 4 so x = 1, and y = -1 3. 4x + 2 = 8 so 4x = 6, and x = 3/2 also thus 3/2*6 + 2y = 4 2y= -5 y = -5/2 maybe ...
*Thursday, October 31, 2013 at 5:58am by Sam*

**physics**

bobpursley, No, the question actually says it travels 0.45h in the last second. So its 45% of the total height I believe. Unless it was a typo the average velocity is unknown. The only information known is its initial velocity (at the top of the fall, not only the last second...
*Thursday, September 3, 2009 at 6:06pm by Ryan*

**physics**

Say that amount is Q and its weight (m g) is W in kilograms work done to lift water = W * (2*10^3 meters) work done by pump per second = 2*10^3 Joules/second) so if the efficiency is 100% then W *2*10^3 = T * (2 *103 Joules/second) So T = W in seconds
*Thursday, March 18, 2010 at 7:04pm by Damon*

**Physics**

Before a collision, the x-momentum of an object is 8.0 × 103 kilogram meters/second, and its y-momentum is 1.2 × 104 kilogram meters/second. What is the magnitude of its total momentum after the collision? A. 1.4 × 104 kilogram meters/second B. 2.0 × 104 kilogram meters/second...
*Wednesday, March 13, 2013 at 10:38am by fredrick*

**Mat 116**

Substitute 25-5y for x in the first equation and solve for y. Put that value in the second equation to find x. Check by putting both values into the first equation. It is not clear what the second problem is or what you are doing with the second problem.
*Sunday, April 11, 2010 at 5:31pm by PsyDAG*

**Science**

Which of the following is an accurate statement of an acceleration value, translated from symbols into words? A. 3 meters per second B. 3 meters per second squared C. 3 square meters per second D. 3 meters in 3 seconds
*Tuesday, April 27, 2010 at 10:39am by Judy*

**math**

a baseball diamond is actually a square. the distance between bases is 90 feet. when a runner on first base tries to steal second, a catcher has to throw from home to second base.how far is it between home and second base?
*Tuesday, September 18, 2012 at 5:43pm by daniel*

**Algebra**

You did not restate the second problem bu by the structure of your equations, I can tell it must be .25x + .10y = .19(20) for the second equation. Hint: multiply that equation by 100 to get rid of those nasty decimals, then from the first y=20-x sub that back into the second ...
*Sunday, February 22, 2009 at 10:20am by Reiny*

**Physics**

What is the algebraic expression for the ratio ac,second/ac,minute of the centripetal accelerations for the tips of the second hand and the minute hand? Express your answer in terms of the periods Tsecond and Tminute. (Answer using T_m to be the period of the second hand and ...
*Wednesday, April 2, 2008 at 4:04pm by Will G*

**Physics**

What is the algebraic expression for the ratio ac,second/ac,minute of the centripetal accelerations for the tips of the second hand and the minute hand? Express your answer in terms of the periods Tsecond and Tminute. (Answer using T_m to be the period of the second hand and ...
*Thursday, April 3, 2008 at 5:53pm by Eric*

**Calculus**

The Product Rule is: (First*Derivative of Second)+(Second*Derivative of First) In your case: First is (x^3-2x) and Second is (5x^2+2x) Try that and write back if you're still having trouble.
*Tuesday, February 15, 2011 at 12:51pm by Kate*

**Intergated chemistry/physics**

A car is accelerated at a rate of 2.5 meters/second^2. If the starting speed is 5.0 meters/second, how many seconds will it take the car to reach a final speed of 27.0 meters/second?
*Wednesday, October 3, 2012 at 10:59am by Laura*

**math**

If the radius of a circular wave is increasing at 2 meters/sec, how fast is the area changing when the radius is 5 meters? A)62.8 square meters per second B)25.0 square meters per second C)31.4 square meters per second D)6.3 square meters per second E) None of the above
*Thursday, March 7, 2013 at 11:44am by Jessica*

**physics**

Call it 2 seconds for the round trip the reflector is half the round trip away, so the sound takes 1 second to get there, and one second to get back (assuming the tugboat is going slowly relative to the speed of sound) so, how far does the sound go in 1 second?
*Monday, January 16, 2012 at 6:14pm by Steve*

**physics**

A car is moving with constant velocity. Which of the following is true? a) the car travels the same distance in each second b) car's velocity increases by the same amount in each second c)car's velocity decreases by the same amount in each second d)car's velocity changes by ...
*Monday, October 15, 2007 at 2:50pm by Tammy*

**English**

2) You might like a semicolon for the last part as a complete sentence: second course, that is the most substantial part of a meal. OR change it to "second course, which is the most, etc." either when it comes to the parentheses 4) must = should, ought to You lost me with the...
*Tuesday, November 1, 2011 at 2:53pm by SraJMcGin*

**trig**

The second hand on a clock is 8 inches long. If the second hand travels a distance of 10pi inches, what is the positive radian measure of the angle that the second hand travels through?
*Thursday, January 26, 2012 at 9:52pm by Anonymous*

**physics**

playing shortshop, you pick up a ground ball and throw it to second base. the ball is thrown horizontally with a speed of 22 m/s ditectly toward point a. when the ball reaches the second baseman 0.45 s later, it is caught at ponit b. (a) how far were you from the second ...
*Tuesday, December 13, 2011 at 4:44pm by taylor*

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