Search: Physics - Spring balls

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Physics - Spring balls
A 275g ball is resting on top of the spring that is mounted on the floor. You exert a force of 325N on the ball and it compresses the spring 44.5cm. If you release the ball from the position, how high above the equilibrium position of the spring-ball system will the ball rise?
Saturday, October 30, 2010 at 12:53pm by Farah

Physics - spring balls
A 275g ball is resting on top of the spring that is mounted on the floor. You exert a force of 325N on the ball and it compresses the spring 44.5cm. If you release the ball from the position, how high above the equilibrium position of the spring-ball system will the ball rise?
Wednesday, October 27, 2010 at 12:39pm by Anonymous

Physics
Two identical balls each have a charge of -7.5x10^-6C. The balls hang from identical strings that are 8‹ from the vertical because of the repulsive force between the charged balls. The balls are separated by a distance of 10cm. What is the tension in one of the ...
Thursday, January 31, 2013 at 6:00pm by Physics...

Physics - spring balls
Thats an easy one
Wednesday, October 27, 2010 at 12:39pm by Dimitris

Probability again
A bag contains 5 yellow balls, 5 orange balls, 6 white balls and 6 red balls. Five balls are drawn and NOT replaced each time
Sunday, November 29, 2009 at 7:59pm by ali

Math for the middle school and elementary teacher
3 red balls, 4 green balls, and 5 yellow balls are in a bag. If 2 balls are drawn randomly (without replacement) find the probability that the balls are different colors. I got 47/66 that the balls are different colors...is that right?
Tuesday, February 28, 2012 at 9:51pm by liz

physics
Janet wants to find the spring constant of a given spring, so she hangs the spring vertically and attaches a 0.42 kg mass to the spring's other end. If the spring stretches 4.0 cm from its equilibrium position, what is the spring constant?
Wednesday, February 22, 2012 at 1:48pm by McKenzie

Math
Four balls are simultaneously picked at random from a jar containing 2 red balls, 2 green balls, and 6 yellow balls. What is the probability that exactly two of the selected balls will be red?
Monday, November 15, 2010 at 10:05pm by Molly

physics
A spring is resting vertically on a table. A small box is dropped onto the top of the spring and compresses it. Suppose the spring has a spring constant of 450 N/m and the box has a mass of 1.5 kg. The speed of the box just before it makes contact with the spring is 0.49 m/s...
Sunday, June 19, 2011 at 10:23pm by Anonymous

maths-probabilty
A box contains 5 red balls and 6 black balls. in how many ways can 6 balls be selected so that there are at least two balls of each color?
Tuesday, March 12, 2013 at 11:51am by anoynomous

Physics- spring gun
A spring gun is made by compressing a spring in a tube and then latching the spring at the compressed position. A 4.97-g pellet is placed against the compressed and latched spring. The spring latches at a compression of 3.92 cm and it takes a force of 9.12 N to compress the ...
Monday, June 6, 2011 at 2:36am by Ramsey

maths-probabilty(urgently needed)
A box contains 5 red balls and 6 black balls. in how many ways can 6 balls be selected so that there are at least two balls of each color?
Tuesday, March 12, 2013 at 2:43pm by anoynomous

Physics
if you had two ping pong balls (or golf balls, or tennis balls), both carrying the maximum possible positive electrical charge, and you also had insulating gloves that allowed you to pick them up without being shocked, would you be strong enough to make the charged balls touch...
Thursday, March 29, 2012 at 1:46pm by Amber

physics
Imagine a spring floating in space. This spring has a very small length when it is unstretched. The spring constant for this spring is 4.2 N/m. Now place 2.6 μC charges on each end of the spring, and allow it to stretch until it reaches a new equilibrium. What is the ...
Monday, February 11, 2013 at 2:48pm by Noah

physics
Calculate the density of the balls in this area. Each ball has a mass of 1 kg. Estimate the area taken up by the whole structure by looking in the Parameters Palette for the diameter of the balls and multiplying this by the number of balls on each side. Record below the total ...
Sunday, November 13, 2011 at 8:42pm by KAy

Math
my problem is: From the box containing 5 red balls, 7 blue balls, 10 black balls. you select 4 balls what is the probabilty that EXACTLY 2 balls are black. so i know how to start it c(10,2)c(2,1) ---------- c(22,40 but how do you solve that ?
Monday, December 13, 2010 at 7:34pm by Katia

physics
A certain uniform spring has spring constant k. Now the spring is cut in half. What is the relationship between k and the spring constant k' of each resulting smaller spring? (Use the following as necessary: k)
Friday, March 23, 2012 at 10:18am by Anonymous

Math
A bag contains 5 balls,8 white balls, 9 green balls,7 blue balls& 6 yellow balls.A ball is drawn at random .Find the probablity that the ball in neither green nor red ?
Thursday, March 8, 2012 at 8:56am by Rajit Rastogi

Physics
A spring with a spring constant of 223.9 N/m is compressed by 0.220 m. Then a steel ball bearing of mass 0.0372 kg is put against the end of the spring, and the spring is released. What is the speed of the ball bearing right after it loses contact with the spring? (The ball ...
Tuesday, September 21, 2010 at 1:14pm by Gina

statistics
Two urns each contain yellow balls and black balls. Urn 1 contains 2 yellow balls and 6 black balls. urn2 contains 2 yellow balls and 5 black balls. A ball is drawn from each urn. What is the probability that both balls are yellow? Please show me how do do this math problem.
Wednesday, March 12, 2008 at 7:36pm by cortnie

physics
a 0.1 kg mass is suspended at rest from a spring near the Earth's surface, the distance that the spring is stretched is measured to be 1.0 cm. What is the spring constant of the spring (remember the MKS units)? A mass of 2 kg is attached to a spring with constant 18 N/m. ...
Wednesday, November 10, 2010 at 1:02am by derek

physics
If a 0.1 kg mass is suspended at rest from a spring near the Earth's surface, the distance that the spring is stretched is measured to be 1.0 cm. What is the spring constant of the spring (remember the MKS units)? A mass of 2 kg is attached to a spring with constant 18 N/...
Monday, November 8, 2010 at 5:34pm by devin

PHYSICS
a 0.1 kg mass is suspended at rest from a spring near the Earth's surface, the distance that the spring is stretched is measured to be 1.0 cm. What is the spring constant of the spring (remember the MKS units)? A mass of 2 kg is attached to a spring with constant 18 N/m. ...
Wednesday, November 10, 2010 at 9:31am by PHYSICIS HELP ASAP

Math
A bag contains 5 balls,8 white balls, 9 green balls,7 blue balls& 6 yellow balls.A ball is drawn at random .Find the probablity that the ball in neither green nor red ? please let me know the formula also
Thursday, March 8, 2012 at 8:56am by Rajit Rastogi

Physics
A 1440-kg crate of cabbages is laid on a level, frictionless track at the end of a heavy spring. The spring is compressed a distance of 0.100 m by a force of 83500 N. When the spring is released, it propels the crate. the spring constant of the spring equals 835000 N/m. What ...
Monday, April 11, 2011 at 11:07pm by Kristen

physics
A 390.0 g block is dropped onto a vertical spring with a spring constant k = 252.0 N/m. The block becomes attached to the spring, and the spring compresses 0.15 m before momentarily stopping. While the spring is being compressed, what work is done by the block's weight? ...
Wednesday, March 28, 2012 at 12:44pm by Katie

Physics
A 930 kg car strikes a huge spring at a speed of 22 m/s, compressing the spring 12.0 m. (a) What is the spring stiffness constant of the spring? (b) How long is the car in contact with the spring before it bounces off in the opposite direction?
Friday, January 8, 2010 at 5:08pm by BJ

Finite Math-Probability
Suppose we have an urn with 10 white balls and 6 red balls, and we create an experiment by randomly selecting 6 balls from the urn. a) What is the probability that the sample has the same number of white balls as red balls? b) What is the probability that there are more red ...
Saturday, November 24, 2012 at 5:05pm by Em

physics
Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.14g and a charge of magnitude q. the balls are attracted to each other. When in equilibrium, the balls are separated by a distance of 2.05cm and the threads attached to the balls make an ...
Friday, January 18, 2013 at 9:34pm by stoic-rider77

Science, Physics
The Pith balls may be positive, negative or neutral. Four pith balls are suspended by insulated threads. The following reaction occurs. a) #2 pith ball is positively charged b) #2 attracts all the other pith balls,. c) #1 and#3 pith balls repel each other. d) #4 attracts all ...
Sunday, March 28, 2010 at 2:15pm by Sagal

Probability again
A box contains 6 red balls, 4 blue balls, and 2 green balls. Three balls are randomly drawn (without replacement) from the box. What is the probability that the three balls selected are all the same color?
Sunday, November 29, 2009 at 7:59pm by Ryan

math
A basket contains 15 red numbered balls and 10 white numbered balls. A sample of five balls is selected. How many samples contain three red balls and two white balls? Explain your answer.
Monday, March 18, 2013 at 9:56am by alice

Finite Math
Two balls are drawn from a bag with 4 black balls and 2 white balls. Find th probability distribution got drawing 2 black balls.
Sunday, June 16, 2013 at 8:01pm by Ericka

math
Are the balls identical, or OR THE RED BALLS VERY LARGE and the white balls very small? Are the red balls on top? The problem probably should have said the balls were identical, and mixed randomly. Pr=.45=x/40 solve for x.
Monday, November 19, 2007 at 1:38am by bobpursley

Physics
A spring has a spring constant of 259N/m. Find the magnitude of the force needed (a) to stretch the spring by 3.54 10-2m from its unstrained length and N (b) to compress the spring by the same amount. N
Tuesday, November 17, 2009 at 8:22pm by Matthew

physics
figure the period of the spring (see the spring harmonic oscillator equations). Then, the time on the spring is one quarter cycle (compressing it), then the spring accelerates the mass to some velocity and as the spring slows, the mass leaves. Max velocity occurs in the spring...
Friday, March 23, 2012 at 9:21am by bobpursley

PHYSICS/MATH
A mass and spring are arranged on a horizontal, frictionless table. The spring constant is k = 450 N/m, and the mass is 5.4 kg. The block is pushed against the spring so that the spring is compressed an amount 0.35 m, and then it is released. Find the velocity of the mass when...
Friday, April 12, 2013 at 2:24pm by HP

probability
there are 4 white balls and 6 red balls in a sack. If two balls are taken out successively ( the first ball is not replaced ) what is the probability that the balls are drawn are of different colors?
Tuesday, March 27, 2012 at 7:59pm by karlo

Physics
A phone cord is not a good spring. A common device using a spring would be a key on the keyboard of your computer. An automobile has springs (and shock absorbers) to provide a smoother ride. My office chair has a spring so that I can lean back. A bungee cord is a spring. A ...
Sunday, November 21, 2010 at 5:34pm by drwls

Physics
Hung vertically, a mass less spring extends by 3.00 cm a mass of 739. G is attached to its lower end. The same mass and spring are then placed apart on a table. The spring is fixed in place and then the mass is given a velocity of 0.900 m/s towards the spring. a) What is the ...
Thursday, October 18, 2012 at 5:26pm by Steeve

physics please help!!
Hung vertically, a massless spring extends by 3.00 cm when a mass of 992.0 g is attached to its lower end. The same mass and spring are then placed apart on a table. The spring is fixed in place and then the mass is given a velocity of 0.800 m/s towards the spring. a) What is ...
Thursday, October 6, 2011 at 7:05pm by archi

Physics
A 0.56-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.13 to 0.26 m (relative to its unstrained length), the speed of the sphere decreases from 5.45 to 4.90 m/s. What is the spring constant of the spring? (The sphere hangs from the ...
Friday, November 30, 2012 at 3:50pm by Elizabeth

Physics
A mass and spring are arranged on a horizontal, frictionless table as shown in the figure below. The spring constant is k = 480 N/m, and the mass is 4.8 kg. The block is pushed against the spring so that the spring is compressed an amount 0.31 m, and then it is released. Find ...
Thursday, February 23, 2012 at 11:36pm by Tarra

Math
my problem is: From the box containing 5 red balls, 7 blue balls, 10 black balls. you select 4 balls what is the probabilty that EXACTLY 2 balls are black. i know that you start it/set it up like this: c(10,2)c(2,1) divided by c(22,4) and i can get the answer by plugging it in...
Monday, December 13, 2010 at 8:17pm by Katia

Statistic
A urn contains 21 red balls, 14 white balls If we randomly select 2 balls, one after the other without replacement, what is the probability that both of the balls selected are red?
Sunday, March 24, 2013 at 9:35pm by Bella

physics
the force exerted by a spring increases as the spring stretches. imagine that you attach a heavy object to one end of a spring and then, while holding the springs other end, whirl the spring and object in a horizontal circle. does the spring stretch. explain
Sunday, January 24, 2010 at 11:53am by billie

Math
b) You can distribute the balls as follows. You put the 9 balls in some arbitrary order and then let student 1 take the first 3, student 2 the next 3, and student 3 the last 3. Then all possible ways to distribute the balls can be realized this way. There are 9! possible ways ...
Wednesday, August 5, 2009 at 12:24pm by Count Iblis

Physics
In a physics lab experiment, a spring clamped to the table shoots a 18 g ball horizontally. When the spring is compressed 20 cm, the ball travels horizontally 4.9 m and lands on the floor 1.3 m below the point at which it left the spring. What is the spring constant?
Tuesday, May 17, 2011 at 1:50pm by Anne

PLEASE HELP!! PHYSICS
A 0.63-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.13 to 0.22 m (relative to its unstrained length), the speed of the sphere decreases from 5.95 to 4.75 m/s. What is the spring constant of the spring? (The sphere hangs from the ...
Saturday, December 1, 2012 at 7:20pm by Elizabeth

physics help!
Objects of equal mass are oscillating up and down in simple harmonic motion on two different vertical springs. The spring constant of spring 1 is 155 N/m. The motion of the object on spring 1 has twice the amplitude as the motion of the object on spring 2. The magnitude of the...
Saturday, November 19, 2011 at 2:26pm by meagan

Physics - Spring
Suppose a 1.5kg block of wood is slid along a floor and it compresses a spring that is attached horizontally to a wall. The spring constant is 555N/m and the block of wood is traveling 9.0m/s when it hits the spring. Assume that the floor is frictionless and the spring is ...
Tuesday, October 26, 2010 at 5:12am by Anonymous

physics help
A 8.6 kg board is wedged into a corner and held by a spring at a 50.0° angle, as the drawing shows. The spring has a spring constant of 186 N/m and is parallel to the floor. Find the amount by which the spring is stretched from its unstrained length.
Monday, November 15, 2010 at 12:20am by jason

ap physics
a man is on the ground level on a compressed spring. the man has a mass of 60kg and the spring is compressed 0.5 and has a spring constant of 500n-m. a)what is the maximum height will the man achieve and the spring decompresses? B)find the velocity right after he leaves the ...
Thursday, January 27, 2011 at 7:32pm by Steph

physics
A 4.5-kg block is hung from a spring causing the spring to elongate 12 cm. With what period will the spring oscillate if the spring was stretched 15 cm and released?
Tuesday, November 20, 2012 at 1:39pm by Jason

Probability
A bag contains some balls of which 1/4 are red. Forty more balls of which 5 are red are added. If 1/5 of all the balls are red, how many balls was there originary?
Monday, April 9, 2012 at 4:42am by Amponsah

physics
x=mg/k spring 1, 5.9*9.81/2000=? spring 2, 5.9*9.81/3000=? combined= spring 1 + spring 2 I answered my own question./
Wednesday, February 27, 2013 at 5:33pm by Sneakatone

College Discrete
An urn contains n > 0 white balls and m > 0 black balls. Consider the experiment where two balls are drawn without replacement. What is the probability that the balls are of the same color? What is the probability of this event, if the balls are drawn with ...
Tuesday, October 16, 2012 at 7:28pm by Anonymous

physics please help
A 8.6 kg board is wedged into a corner and held by a spring at a 50.0° angle, as the drawing shows. The spring has a spring constant of 186 N/m and is parallel to the floor. Find the amount by which the spring is stretched from its unstrained length.
Tuesday, November 16, 2010 at 12:38am by tim

math
A toy baseball bat comes with 3 plastic balls in a box that is a rectangular solid. The box is just big enough to hold the 3 balls. The radius of the balls is 1.9 in. What is the volume of the air in the box surrounding the balls?
Sunday, December 20, 2009 at 1:39pm by kate

Physics
When a 1.53-kilogram mass is placed on a spring with a spring constant of 30.0 newtons per meter, the spring is compressed 0.500 meter. How much energy is stored in the spring?
Tuesday, January 15, 2013 at 11:25pm by Anon

PHYSICS
When a 1.53-kilogram mass is placed on a spring with a spring constant of 30.0 newtons per meter, the spring is compressed 0.500 meter. How much energy is stored in the spring?
Tuesday, January 15, 2013 at 10:06pm by Anon

physics
a spring with a length of 22.0 centimeters hangs from a ceiling. when a 755-gram mass is attached ti the spring, the spring strethes to 35.0 centimeters. what is the magnitude of the spring constant in N/m
Wednesday, August 1, 2012 at 7:30pm by Anonymous

physics
a block is held 1.3m above a spring and is dropped.The spring compresses 6cm before sending the ball into the air. How fast is the ball going when it hits the spring? What is the spring constant? How high in the air does the ball go after hitting the spring?
Thursday, November 6, 2008 at 10:20pm by jeff

Finite Math
An urn contains six red balls and five white balls. A sample of 2 balls is selected at random from the urn. What is the probability that at least one of the balls is red?
Thursday, March 15, 2012 at 12:35am by Amanda

Statistics - math
An urn contains 5 red balls and 10 white balls. 6 balls are randomly drawn and not replaced. What is the probability that 3 or fewer balls drawn are red?
Tuesday, October 2, 2012 at 5:25pm by Gina

Physics
A spring gun is made by compressing a spring in a tube and then latching the spring at the compressed position. A 4.97-g pellet is placed against the compressed and latched spring. The spring latches at a compression of 5 cm, and it takes a force of 9.12 N to compress the ...
Sunday, December 11, 2011 at 1:06pm by Sarah

physics
In a physics lab experiment, a spring clamped to the table shoots a 22 g ball horizontally. When the spring is compressed 22 cm, the ball travels horizontally 5.2 m and lands on the floor 1.3 m below the point at which it left the spring. What is the spring constant?
Wednesday, March 24, 2010 at 10:17am by Naso

physics
a 0.75 kg mass attached to avertical spring streches the spring 0.30m. what is the spring constant? the mass-spring system is now placed on the horizontal surface and set vibrating. what is the period of the vibration?
Friday, March 25, 2011 at 12:32am by marco

math
we have box,in box 3 white balls,4 red balls,4 black balls..how i choose 2 black balls and 3 red balls successively?
Tuesday, September 18, 2012 at 9:31am by kholoud

Physics
A spring oriented vertically is attached to a hard horizontal surface as in the figure below. The spring has a force constant of 1.64 kN/m. How much is the spring compressed when a object of mass m = 2.35 kg is placed on top of the spring and the system is at rest?
Friday, April 26, 2013 at 9:23pm by Abdul

help
a store does a display of 200 balls, he places them in the shape of a square pyramid. the bottom layer has 64 balls for each consecutive layer of balls, one ball is placed where 4 balls meet. how may layers will be in the pyramid? how many will be left over?
Saturday, May 18, 2013 at 10:09am by Anonymous

Math
Tom has a bag filled with 10 green balls, 5 red balls and 5 blue balls, what part on toms bag has green balls
Tuesday, April 23, 2013 at 11:37pm by Gio

statistics
A box contains 3 white and 5 black balls. Four balls are drawn at random "with replacement" from the box (i.e. selected balls are returned to the box and mixed, before drawing the next ball). Let X be the number of black balls drawn. What is the distribution of X? ...
Friday, April 13, 2012 at 12:19am by Anonymous

physics and guns
A spring gun is made by compressing a spring in a tube and then latching the spring at the compressed position. A 4.97-g pellet is placed against the compressed and latched spring. The spring latches at a compression of [01] cm, and it takes a force of 9.12 N to compress the ...
Tuesday, December 13, 2011 at 2:34pm by Lauren

Physics
A 4 kg weight falls on a spring that is facing up. The weight compresses the spring 0.25m. If the spring constant of the spring is 3.5N/m, how high was the weight when it was dropped?
Tuesday, March 19, 2013 at 7:14pm by Wilson

Maths :(
41 different balls are drawn from a bag containing balls numbered 1,2,…,300. The probability that the number of odd balls drawn is larger than the number of even balls can be expressed as ab where a and b are coprime positive integers. What is the value of a+b?
Monday, April 15, 2013 at 4:22am by Ian

Physics
A spring id vertically, as shown below, and a 500g mass is hung from its lower end. The EQUILIBRIUM extension of the spring is observed to be 10.0cm. (I) What is the spring constant of the spring? (II) If the is pulled down by 5.00cm and released, what is the frequency of the ...
Wednesday, August 3, 2011 at 11:27pm by Melissa

physics
Two identical steel balls, each of mass 5.0 kg, are suspended from strings of length 29 cm so that they touch when in their equilibrium position. We pull one of the balls back until its string makes an angle θ = 25° with the vertical and let it go. It collides ...
Friday, March 2, 2012 at 1:12pm by Katie

Physics
A spring is compressed 12 cm. A 100-g block is placed against the spring. When the block is released, the block rises 2.0 m up the slop. Neglect friction. What is the spring constant of the spring?
Wednesday, March 27, 2013 at 12:46pm by Kerwyn

Physics
A 290 g block is dropped onto a relaxed vertical spring that has a spring constant of k = 2.6 N/cm. The block becomes attached to the spring and compresses the spring 10 cm before momentarily stopping. (a) While the spring is being compressed, what work is done on the block by...
Monday, October 5, 2009 at 9:35pm by Mario

Physics
Two billard balls move toward one another.The balls have identical masses, and the collision is perfectly elastic. The initial velocity of the balls are +30 cm/s and -20 cm/s, what is the velocity of each ball after the collision?
Sunday, December 2, 2012 at 5:24pm by Renee

maths
Hannah has a balls.4/5 is a black balls while the remaining 35 is a red balls.how many more black balls does hannah have...thanks!
Sunday, April 14, 2013 at 10:12am by nimie

Physics
In the parallel spring system, the springs are positioned so that the 44 N weight stretches each spring equally. The spring con- stant for the left-hand spring is 3.6 N/cm and the spring constant for the righ-hand spring is 6.4 N/cm. How far down will the 44 N weight stretch ...
Thursday, November 5, 2009 at 7:39pm by Letisha

physics
First, find the equations that are pertinent to the problem. F(spring) = -k*x where F(spring) is the force on a spring, k is the spring constant, and x is the displacement. w = (k/m)^1/2 where w is the angular acceleration, m is the mass of the spring T = 2*PI/w where T is the...
Sunday, December 2, 2012 at 3:20pm by Jennifer

Probability Distribution
An urn has fifteen red balls and nineteen white balls. Three balls are selected at random and the number of red balls are observed. Find the probability distribution for Number of Red Balls: 0 = 1 = 2 = 3 =
Saturday, April 7, 2012 at 1:59pm by F0reveryoung

Physics
A pinball machine has a spring with spring constant of 125N/m. A 65g ball is placed on the spring and the spring is compressed 5cm. How far along the playing surface makes a 15 degrees angle with the horizontal? ignore friction. How to do this using Energies and Work done? No ...
Monday, April 15, 2013 at 5:37pm by Sash

Physics
A spring has an equilibrium length of 20.0 cm and a spring constant of 57.9 N/m. The spring is connected to the underside of the roof of a car and a 0.294 kg block suspended from it. How long (in cm) is the spring when the car is at rest? How long is the spring if the car is ...
Saturday, December 8, 2012 at 1:32am by Anonymous

physics
A 11.6 kg weather rocket generates a thrust of 215.0 N. The rocket, pointing upward, is clamped to the top of a vertical spring. The bottom of the spring, whose spring constant is 399.0 N/m, is anchored to the ground. Initially, before the engine is ignited, the rocket sits at...
Saturday, October 31, 2009 at 8:24pm by Anonymous

Physics
A 0.230 kg block on a vertical spring with spring constant of 4.25e3 N/m is pushed downward, compressing the spring 0.048 m. When released, the block leaves the spring and travels upward vertically. How high does it rise above the point of release?
Sunday, October 14, 2012 at 12:16pm by Angela

Physics
A 0.260 kg block on a vertical spring with a spring constant of 5.00x10^3 N/m is pushed downward, compressing the spring 0.100 m. When released, the block leaves the spring and travels upward vertically. How high does it rise above the point of release?
Thursday, November 19, 2009 at 3:08am by Sarah

Finite Math
An urn contains sixteen red balls and seventeen white balls. A sample of three balls is selected at random and the number of red balls observed. Determine the probability distribution for this experiment: Number of Red Balls/Probability 0...Probability=? 1...Probability=? 2......
Thursday, April 5, 2012 at 12:28am by Amanda

Physics - Charge on pith balls
Two pith balls equally charged and each with a mass of 1.5. White one ball is suspended by a thread, the other is brought close to it and a state of equilibrium is reached. In that situation, the two balls are separated by 2.6cm and the thread attached to the suspended ball ...
Monday, October 18, 2010 at 7:10am by Anonymous

math
a box contains 5 red and 4 blue balls. In how manys ways can 4 balls be chosen such that there are at most 3 balls of each colour.
Friday, February 25, 2011 at 5:54pm by michele

physics
A new type of spring is found where the spring force F is given by F=-kx + bx^2 where k=400 N/ m and b=100 N/m^2 and x is the expansion (or compression) of the spring from its equilibrium position. The spring is attached to a point mass of 1 kg sitting on a horizontal ...
Monday, April 4, 2011 at 3:48pm by Physics

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