Number of results: 72,911

**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?

*October 27, 2010 by Anonymous*

**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?

*October 27, 2010 by Anonymous*

**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?

*October 29, 2010 by Anonymous*

**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?

*October 30, 2010 by Farah*

**Physics**

A pinball machine has balls of mass 134 g. The springs have a spring constant of 93.4N/m and a relaxed length of 10 cm. To what length must the spring be compressed if it is to give a ball a speed of 2.0 m/s?

*March 15, 2016 by Supansa*

**Physics**

A pinball machine has balls of mass 134 g. The springs have a spring constant of 93.4N/m and a relaxed length of 10 cm. To what length must the spring be compressed if it is to give a ball a speed of 2.0 m/s?

*March 15, 2016 by Supansa*

**Math**

A box containing 20 yellow balls, 9 red balls and 6 blue balls. If the balls are selected at random, what is the smallest number of balls that need to be selected so you will select at least two balls of each colour

*May 4, 2014 by Baby girl*

**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 strings? ...

*January 31, 2013 by Physics...*

**physics**

A spring (spring 1) with a spring constant of 520N/m is attached to a wall and connected to another weaker spring (spring 2) with a spring constant of 270N/m on a horizontal surface. Then an external force of 70N is applied to the end of the weaker spring (#2). how much ...

*June 29, 2013 by victoria*

**Basic Mathematics**

A bag contains 2 red balls, 3 blue balls and 5 green balls. 3 balls are drawn at random. Find the probability that a) the 3 balls are of different colours b) 2 balls are of the same colour c) all the 3 are of the same colour.

*May 23, 2014 by Shammi*

**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?

*February 28, 2012 by liz*

**math**

In a box contain 4 green balls 4 white balls and 4 red balls .If 4 balls are drown randomly what is the probability that no one even out of the 4 balls being white.

*May 14, 2016 by Amit sahu*

**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?

*November 15, 2010 by Molly*

**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?

*February 22, 2012 by McKenzie*

**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 ?

*December 13, 2010 by Katia*

**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...

*June 19, 2011 by Anonymous*

**GEOMETRY**

if two balls are drawn without replacement from a box containing 4 blue balls, 3 yellow balls, and 2 white balls, what is the probability of getting 2 yellow balls? (write your answer as a fraction in lowest terms.)

*June 26, 2016 by TIERNEY*

**math**

suppose a hat containing 100 balls consists of 20blue ball,30yellow balls,30red balls and 20green balls.a sample of 5 balls is drawn from the hat one by one without replacement.what is the probability that there will be 2blue balls in the sample

*April 15, 2015 by pat*

**Finite Math**

A bowl contains 10 red balls, 5 blue balls, and 8 green balls. A woman selects balls at random without looking in the bowl. How many balls must she select to be sure that she has at least one ball of each color?

*November 14, 2015 by Ronnie*

**math**

a box filled with identically shaped balls contains 5 balls with the number 1 on them, 8 balls with the numbers 10 on them, 15 balls with the number 12, and 2 balls with the number 20 on them. If the balls cannot be seen from outside the box, and if one ball is picked at ...

*July 31, 2013 by tg*

**statistics**

A jar contains 7 red balls, 5 green balls, 4 blue balls, and 3 white balls. A sample of size 7 balls is selected at random without replacement . Find t the probability that sample contains two red balls, 2 green balls, 2 blue balls, and 1 white ball.

*December 26, 2014 by kp*

**statistics**

A jar contains 2 red balls, 2 blue balls, 2 green balls and 1 orange ball. Balls are randomly selected, without replacement, until 2 of the same colour are obtained. Calculate the probability that more than 3 balls must be selected.

*August 7, 2014 by Koala*

**statistics**

A jar contains 2 red balls, 2 blue balls, 2 green balls and 1 orange ball. Balls are randomly selected, without replacement, until 2 of the same colour are obtained. Calculate the probability that more than 3 balls must be selected.

*July 2, 2016 by peter*

**physics**

Question Part Points Submissions Used 1 –/2.35 0/100 Total –/2.35 ... Janet wants to find the spring constant of a given spring, so she hangs the spring vertically and attaches a 0.53 kg mass to the spring's other end. If the spring stretches 3.9 cm from its equilibrium ...

*March 25, 2015 by hannah*

**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 ...

*June 6, 2011 by Ramsey*

**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...

*March 29, 2012 by Amber*

**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 ...

*November 13, 2011 by KAy*

**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?

*March 12, 2013 by anoynomous*

**maths**

a box contains 5 red balls and 6 black balls in how many ways can 6 balls be selected so that there are atleast two balls of the same colour

*January 13, 2016 by shweta*

**kapahi**

In a beg with 8 red balls and 11 blues balls how many 5 balls boxes can be chosen those have 4 blue balls?

*June 10, 2015 by Harish kumar*

**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/m. ...

*November 8, 2010 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. How ...

*November 10, 2010 by derek*

**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. How ...

*November 10, 2010 by PHYSICIS HELP ASAP*

**Math**

Tom has 5 boxes of balls. Each box contains x balls. His father gives him another 8 balls. Find the total number of balls Raul has in terms of x

*November 14, 2015 by Sam o*

**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?

*March 12, 2013 by anoynomous*

**physics**

The charge on two pith balls can be calculated by knowing their masses and observing the angle of separation between the balls. If both balls are equally charged and they are suspended by strings that are 1.0 m long, calculate that charge. (mass for both balls = 0.003kg) angle...

*June 7, 2014 by grey*

**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 ?

*March 8, 2012 by Rajit Rastogi*

**statistic**

a box contain 5red balls,6 white balls,and 6black ball.two balls are drown but not replaced.find the probsbilty that both balls are of the same colour

*August 20, 2014 by junu*

**Math**

A bag contains three black balls, four white balls and five red balls. Three balls are removed without replacement. What is the probability of obtaining a one of each colour b at least two red balls ?

*September 27, 2014 by Ariyo*

**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 ...

*September 21, 2010 by Gina*

**Physics!**

A spring with a spring constant of 224.3 N/m is compressed by 0.253 m. Then a steel ball bearing of mass 0.0433 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 ...

*October 24, 2014 by Anonymous*

**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 new ...

*February 11, 2013 by Noah*

**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.

*March 12, 2008 by cortnie*

**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...

*December 13, 2010 by Katia*

**Math**

A bag contains 33 balls: 10 blue 11 red and 12 green If a person will select balls at random from the bag without replacement, what is the minimum number of balls needed to be selected in order to be sure that the balls selected include 3 balls of the same color

*December 26, 2014 by Sarah*

**Math**

A bag contains 33 balls: 10 blue, 11 red, and 12 green. If a person will select balls at random from the bag without replacement, what is the minimum number of balls that need to be selected in order to be sure that the balls selected include 3 balls of the same color?

*February 5, 2015 by Esther Jinadu*

**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)

*March 23, 2012 by Anonymous*

**Physics**

you strike a huge spring at a speed of 30m/s while strapped in a steel cage. When you hit the spring with combined mass of 320kg it is compressed 9.0m. A) What is the spring constant of the spring? B) How long are you in contact with the spring before it bounces off in the ...

*February 22, 2016 by Sierra*

**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?

*January 8, 2010 by BJ*

**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 ...

*January 18, 2013 by stoic-rider77*

**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 ...

*April 4, 2011 by Kristen*

**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 ...

*April 11, 2011 by Kristen*

**Physics**

when loading a toy launcher, a spring is pulled back 15 cm. the spring is known to have a spring constant of 315 N/m. A small object of mass 4.46 g is place at the end of the spring. What acceleration will the object experience the instant the spring is released?

*March 6, 2017 by Zoey*

**Physics**

A 540 g block is released from rest at height h0 above a vertical spring with spring constant k = 320 N/m and negligible mass. The block sticks to the spring and momentarily stops after compressing the spring 19.8 cm. How much work is done (a) by the block on the spring and (b...

*March 10, 2014 by Riley*

**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? What ...

*March 28, 2012 by Katie*

**Physics**

A 395.0 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 0.29 m before momentarily stopping. While the spring is being compressed, what work is done by the block's weight? What ...

*December 29, 2013 by John*

**physics**

A 395.0 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 0.29 m before momentarily stopping. While the spring is being compressed, what work is done by the block's weight? What ...

*December 30, 2013 by Erin*

**physics**

A 395.0 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 0.29 m before momentarily stopping. While the spring is being compressed, what work is done by the block's weight? What ...

*January 1, 2014 by Erin*

**Physics**

An ideal spring has a spring constant k = 20 N/m. The spring is suspended vertically. A 0.7-kg body is attached to the unstretched spring and released. It then performs oscillations.

*October 29, 2014 by Anonymous*

**Physics**

A block of mass M=6 kg and initial velocity v=0.8m/s slides on a frictionless horizontal surface and collides with a relaxed spring of unknown spring constant. The other end of the spring is attached to a wall. If the maximum compression of the spring is 0.2 m, what is the ...

*July 21, 2013 by Helena Beau*

**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?

*November 20, 2012 by Jason*

**Physics - please help!!**

A 395.0 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 0.29 m before momentarily stopping. While the spring is being compressed, what work is done by the block's weight? What ...

*December 30, 2013 by John*

**Physics - please help me..**

A 395.0 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 0.29 m before momentarily stopping. While the spring is being compressed, what work is done by the block's weight? What ...

*December 31, 2013 by Erin*

**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 ...

*March 28, 2010 by Sagal*

**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

*November 17, 2009 by Matthew*

**Physics**

An unstretched spring with spring constant 37 N/cm is suspended from the ceiling. A 3.3 kg mass is attached to the spring and let fall. To the nearest tenth of a centimeter, how far does it stretch the spring?

*September 24, 2013 by Jay*

**Physics**

Assume a spring has an un-stretched length Xo. Write an expression for the elastic potential energy of the spring in terms of the position of the end of the spring x and its spring constant k.

*March 13, 2014 by Tim*

**Physics**

Assume a spring has an un-stretched length Xo. Write an expression for the elastic potential energy of the spring in terms of the position of the end of the spring X and its spring constant K.

*March 14, 2014 by Tim*

**math ms sue please help, PLEASE!!!!**

tori had 20 gumballs in a bag. there were 2 red gum balls, 3 blue gum balls, 5 yellow gum balls, and 10 purple gum balls. what was the ratio of blue gum balls to total number of gum balls?

*November 13, 2013 by math help*

**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 ...

*November 5, 2009 by Letisha*

**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 ...

*November 24, 2012 by Em*

**physics**

A 0.67-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.10 to 0.21 m (relative to its unstrained length), the speed of the sphere decreases from 5.35 to 4.55 m/s. What is the spring constant of the spring? (The sphere hangs from the ...

*December 5, 2013 by Donna*

**physics**

A 0.67-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.10 to 0.21 m (relative to its unstrained length), the speed of the sphere decreases from 5.35 to 4.55 m/s. What is the spring constant of the spring? (The sphere hangs from the ...

*December 9, 2013 by Donna*

**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?

*November 29, 2009 by Ryan*

**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 ...

*November 30, 2012 by Elizabeth*

**Pre-Algebra**

Two urns each contain green balls and blue balls. Urn I contains 4 green balls and 6 blue balls, and Urn II contains 6 green balls and 2 blue balls. A ball is drawn at random from each urn. What is the probability that both balls are blue? A. 2/15 B. 3/20 C. 1/10 D. 4/153

*November 5, 2015 by Dakota*

**Please Help!!! Algebra...**

Two urns each contain green balls and blue balls. Urn I contains 4 green balls and 6 blue balls, and Urn II contains 6 green balls and 2 blue balls. A ball is drawn at random from each urn. What is the probability that both balls are blue? A. 2/15 B. 3/20 C. 1/10 D. 4/153

*November 5, 2015 by Dakota*

**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.

*March 18, 2013 by alice*

**Strayer University**

An urn contains white balls and red balls. If Juan chooses balls at random from the urn, what is the probability that he will select white balls and red balls? Round your answer to decimal places

*June 16, 2014 by Thomala*

**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 ...

*December 1, 2012 by Elizabeth*

**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.

*June 16, 2013 by Ericka*

**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 replacement? ...

*October 16, 2012 by Anonymous*

**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?

*March 27, 2012 by karlo*

**GEOMETRY**

from a bag containing 6 white balls, 3 black balls and 13 red balls, two balls are drawn at random. what is the probability that they are both red?

*June 26, 2016 by kay*

**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...

*April 12, 2013 by HP*

**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 ...

*October 6, 2011 by archi*

**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?

*March 24, 2013 by Bella*

**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 ...

*October 18, 2012 by Steeve*

**Physics**

You exert a 100-N pull on the end of a spring. When you increase the force by 20% to 120 N, the spring's length increases 4.0cm beyond its original stretched position. What is the spring constant of the spring?

*March 10, 2014 by BULTURP*

**Physics**

A 540 g block is released from rest at height h0 above a vertical spring with spring constant k = 320 N/m and negligible mass. The block sticks to the spring and momentarily stops after compressing the spring 19.8 cm. How much work is done (a) by the block on the spring and (b...

*March 16, 2014 by Fiona*

**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 ...

*February 23, 2012 by Tarra*

**Physics please help?????**

A 540 g block is released from rest at height h0 above a vertical spring with spring constant k = 320 N/m and negligible mass. The block sticks to the spring and momentarily stops after compressing the spring 19.8 cm. How much work is done (a) by the block on the spring and (b...

*March 16, 2014 by Fiona*

**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?

*December 2, 2012 by Renee*

**physics**

in a bag there are 20 red 30black 40 blue50 white balls. what is the minimum number of balls to be drawn without replacement so that you are certsin about getting 4 red,5 black,6 blue,7 white balls

*June 24, 2014 by nandhu*

**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.

*November 15, 2010 by jason*

**Math**

Mohit put 6 red balls and 7 black balls into a bag. What fraction of the balls are red balls?

*November 15, 2016 by Lakshmi*

**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?

*March 23, 2010 by Naso*

**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?

*March 24, 2010 by Naso*

**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?

*May 17, 2011 by Kate*

**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?

*May 17, 2011 by Anne*