Monday

November 24, 2014

November 24, 2014

Number of results: 32,606

**PHYSICS**

Two objects are connected by a massless string as shown in the figure below. The pulley is massless and rotates without friction. The object of mass m = 1.7 kg slides without friction on an inclined plane which makes an angle of è = 38° with the horizontal. The object of mass ...
*March 17, 2011 by Tanya*

**Physics**

Three objects are connected on an inclined table as shown in the diagram below. The objects have masses 8.0 kg, 4.0 kg and 2.0 kg as shown, and the pulleys are frictionless. The tabletop is rough, with a coefficient of kinetic friction of 0.47, and makes an angle of 20.0° with...
*May 18, 2013 by Joeline*

**physics**

The figure shows a 0.3 kg baseball just before and just after it collides with a bat. Just before, the ball has velocity of magnitude 11.4 m/s and angle = 31.4 degrees. Just after, it is traveling directly upward with velocity of magnitude 9.00 m/s. The duration of the ...
*March 25, 2013 by Alex*

**Physics**

We learned in lecture that the magnetic force on a charge q moving with velocity v in a magnetic field ~B has the form F = q~v × B One important fact about the cross-product is that for two vectors A and B , the following is true A × B = −B × A which may also be ...
*February 23, 2010 by Jess*

**Physics**

Four railroad cars, all with the same mass of 11300 kg, sit on a track, as shown in the figure below. A fifth car of identical mass approaches them with a velocity of 19.3 m/s (to the right). This car collides and couples with the other cars. (a) What is the kinetic energy of ...
*July 7, 2014 by Anonymous*

**Physics**

Four railroad cars, all with the same mass of 11300 kg, sit on a track, as shown in the figure below. A fifth car of identical mass approaches them with a velocity of 19.3 m/s (to the right). This car collides and couples with the other cars. (a) What is the kinetic energy of ...
*July 7, 2014 by Anonymous*

**Physics**

Four railroad cars, all with the same mass of 11300 kg, sit on a track, as shown in the figure below. A fifth car of identical mass approaches them with a velocity of 19.3 m/s (to the right). This car collides and couples with the other cars. (a) What is the kinetic energy of ...
*July 7, 2014 by Anonymous*

**vector**

Three ropes hold a zeppelin in place, but two of the ropes break. The remaining rope holds the zeppelin with a tension of 255 N at an angle of 40 degrees with the ground due to a wind. The weight (vertical force) of the zeppelin and its contents is 200 N, and the upward ...
*December 16, 2012 by chelseavanderguard*

**physics please help**

The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.030 kg and is moving along the x axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 0.055 kg and is initially at rest. The collision is not head-...
*November 7, 2010 by joshua*

**physics **

How would I graph a collision. i.e if I have a problem A 12,000 kg railroad car traveling at a speed of 19 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed afterward? What would my x axis be and what would...
*January 25, 2010 by Brendan *

**Calculus**

Hello, could someone please help me with this problem? I'm a little stuck with it. Thanks, Isaac A rectangle is to be inscribed with its base on the x-axis and its other two vertices above the x-axis on the parabola y=9-x^2 (a) find the dimensions of the rectangle of largest ...
*November 28, 2011 by Isaac*

**Algebra**

I have a graph that shows on the Y - axis Just the word speed (no numbers given) And on the x - axis is time (no number given) The graph itself shows a decline in speed But then the line goes up sharply I am suppose to write a scenario for the graph PlEASE HELP
*November 5, 2014 by Don't know how to solve*

**Algebra**

I have a graph that shows on the Y - axis Just the word speed (no numbers given) And on the x - axis is time (no number given) The graph itself shows a decline in speed But then the line goes up sharply I am suppose to write a scenario for the graph PlEASE HELP
*November 5, 2014 by HELP!*

**Precalculus**

Juana and Diego Gonzales, ages six and four respectively, own a strong and stubborn puppy named Corporal. It is so hard to take Corporal for a walk that they devise a scheme to use two leashes. If Juana and Diego pull with forces of 23 lb and 27 lb at the angles shown in the ...
*February 3, 2010 by Marie*

**Proportional Lengths--Desperate for help!!!**

The lengths in the figure are proportional. In the first figure- 3 on top, and 2 on the bottom In the second figure- 4 1/2 on top, and x on the bottom These are the choices that are written on my assignment. One is the correct answer. A. 4 1/2 B. 3 C. 2 1/2 D. 2 I tried ...
*February 25, 2007 by Walter*

**Physics RC**

how does the circuit potential difference,v, across the capacitor varies with R(resistance)in an RC circuit??
*December 1, 2007 by AllyKat*

**MATH Algebra**

How do I find the variation constant and an equation of variation where y varies directly as x and y =70 when x=7
*September 12, 2009 by Anonymous*

**math**

Find the variation equation for the variation statement. z varies directly as x and inversely as y; z = 3 when x = 24 and y = 40
*March 20, 2010 by Anonymous*

**Math**

If b varies directly as the square root of w and b equals a negative 24 when w equals 36, what is w when b is equal to 1/8?
*September 16, 2012 by Trey*

**physics for scientists and engeneers I**

A 0.145-kg baseball pitched horizontally at 27 m/s strikes a bat and is popped straight up to a height of 43 m. If the contact time between the bat and the ball is 2.35 ms, calculate the average force [exerted by the bat on the ball] during contact. [Let the positive axis lie ...
*February 15, 2011 by Johnathon*

**Statistics am I correct?**

Each of ten tickets is marked with a different number from 1 to 10 and put in a box. If you draw a ticket at random from the box, what is the probability that you will draw 2, 3, or 1? A) 1/2 B) 1/10 C) 1/3 D) 3/10 P=1/10 for 1 P=1/10 for 2 p=1/10 for 3 P=3/10
*June 15, 2010 by bart*

**math**

How can the digits 1 through 5 be arranged in the box to make the greast products? The box is 2 row x 3 column. The first bottom column marked with "x".
*September 8, 2012 by cupcake*

**maths**

How much money is saved by buying an article priced at $80 with a 40% discount,rather than buying an article marked at $90 with discounts of 35% and 10% ? A. $ 4.65 B. $1.50 C. $10.50 D. $3.15 E. $4.25 not just answer
*August 15, 2013 by Tomas*

**Algebra**

Find the variation constant and an equation of variation where y varies directly as x and y = 20 when x = 10
*April 17, 2008 by Mary*

**Algebra**

Find the variation constant and an equation of variation where y varies directly as x and y=50 when x=10
*August 12, 2010 by Tim*

**algebra**

find the variation constant and an equation of variation where y varies directly as x and y = 54 when x =x6
*April 15, 2012 by Terry*

**algebra**

Find the variation constant and a equation of variation where y varies inversely as x and y=1 when x=15
*June 1, 2012 by Randy*

**Math**

Find the value of y for a given value of x, if y varies directly with x. If y = –252 when x = 84, what is y when x = 74?
*September 1, 2012 by Kelsey*

**Math**

Write an equation: x varies directly as y and inversly directly to the cube of Z
*January 21, 2013 by Sara*

**physics**

A block of mass m1 = 2.4 kg initially moving to the right with a speed of 3.3 m/s on a frictionless, horizontal track collides with a spring attached to a second block of mass m2 = 4.1 kg initially moving to the left with a speed of 1.5 m/s as shown in figure (a). The spring ...
*October 14, 2013 by Leticia*

**math**

6. Find the z-score related to the raw score, mean, and standard deviation as follows. Assume a normal probability distribution. Raw Score50, 45, and 4.ìó=== 7. What is the Z score of a raw score 1.6 standard deviations below the mean? (See Page 540), 8. What percent of ...
*August 16, 2010 by harmony*

**Physics circular motion**

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the centripetal acceleration of a person situated (a) at ...
*February 15, 2011 by Gina*

**Physics**

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed and centripetal acceleration of a person situated ...
*November 6, 2012 by Don*

**Physics**

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed and centripetal acceleration of a person situated ...
*November 6, 2012 by Don*

**geo**

a graphic artist is using a coordinate plane to design a company logo. the log has an equilateral triangle inscribed in a circle.. The lies in quadrant 1, is tangent to the x and y axis and has a radius of 10 units. one side of the triangle is parallel to the y axis and one ...
*May 14, 2014 by mary*

**history**

Create a timeline for the years 1780 to 1850. On the timeline, address the changes in political parties, the significant events that marked the growth of democracy, the market revolution, and the beginning of American expansionism
*April 17, 2009 by igli*

**physics**

The figure above shows a top view of a bar that can slide without friction. The resistor is 6.00 Ω and a 2.50 T magnetic field is directed perpendicularly downward, into the paper. Let l=1.20 m. a. Calculate the applied force required to move the bar to the right at a ...
*September 17, 2011 by kait*

**Physics **

A velodrome is built for use in the Olympics (see the figure below). The radius of curvature of the surface is 15.9 m. At what angel should the surface be banked for cyclists moving at 15.0 m/s? Choose an angle so that no frictional force is needed to keep the cyclists in ...
*September 30, 2014 by Emily*

**chemistry**

What is the smalles t subatomic particle
*October 21, 2008 by Frances*

**english**

what is the past particle of kneel?
*June 18, 2010 by jerry*

**AP Physics **

A particle at t1 = -1.4 s is at x1 = 3.6 cm and at t2 = 4.5 s is at x2 = 8.5 cm. What is its average velocity?
*September 3, 2014 by Giulianna *

**physics **

IP You want to nail a 2.4kg- board onto the wall of a barn. To position the board before nailing, you push it against the wall with a horizontal force to keep it from sliding to the ground What happens to the force of static friction if you push against the wall with a force ...
*November 11, 2010 by mathhelp*

**Physics(IMPORTANT)**

An airliner makes an emergency landing with its nose wheel locked in a position perpendicular to its normal rolling position. The forces acting to stop the airliner arise from friction due to the wheels and from the breaking effort of the engines in reverse thrust mode. The ...
*November 1, 2013 by keitanako*

**Algebra (please help!)**

If y varies directly as x and y is 3 when x is 8, what is the constant of the variation? I don't understand what they are asking and how to solve this. Please help if you can! Thank you so much! :)
*May 29, 2009 by Faith*

**Math **

If y varies directly as x and y=3 when x=10, find x when y=8? Can you please show me step by step solution for this problem?
*January 10, 2013 by HELPP!!!*

**physics**

why weight of gold varies at 2 different places like panna and ladakh (physics)
*June 12, 2013 by rita*

**Math**

Suppose that y varies inversely as t he cube of x. If y is 1/2 when x is 2 , find the constant of variation and variation equation
*August 28, 2014 by Mary*

**Algebra**

Write an equation that expresses the relationship. Then solve the equation for c. q varies jointly as c and the square of h.
*October 23, 2014 by Jacqueline *

**science**

two bulb are marked 60 w,220v and 100w,220v.which one of the two will glow brighter?
*July 10, 2013 by dhilip*

**Math**

How would you order the following from least to greatest? 1/4, 0.2, 3/8, 30% Would it be 0.2, 1/4, 30% and 3/8? This was my answer but it was marked wrong? Where did I go wrong? Thanks for your help
*November 10, 2014 by Kyle*

**Physics ~work shown pls help!**

An electron is accelerated by a 6.4 kV potential difference. The charge on an electron is 1.60218 × 10^−19 C and its mass is 9.10939 × 10^−31 kg. How strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.1 cm? Answer in ...
*April 15, 2011 by cr*

**Physics**

Three particles A, B, C start from the origin from the same time, A with velocity a along x-axis, B with velocity b along y-axis, C with velocity c in xy plane along a line x=y. What should be the magnitude of c so that they always remain collinear is (a). (a+b)/2 (b). √...
*November 6, 2014 by Edward*

**Physics**

The spring shown in the figure is compressed 59cm and used to launch a 100 kg physics student. The track is frictionless until it starts up the incline. The student's coefficient of kinetic friction on the 30∘ incline is 0.14 . k= 80,000 N/m m=100 kg uk= .14 DeltaX= 59 ...
*November 8, 2014 by Dib*

**physics**

sorry i have about 5 questions on this homework packet that i just can't figure out.... hope you can help me A bowling ball (mass = 7.2 kg, radius = 0.12 m) and a billiard ball (mass = 0.41 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of ...
*September 12, 2010 by kelly*

**physics - leg cast**

The leg and cast in the figure below weigh 280 N, with the center of mass as indicated by the blue arrow in the diagram. The counterbalance w1 weighs 105 N. Determine the weight w2 and the angle α needed so that no force is exerted on the hip joint by the leg plus cast.
*May 25, 2010 by lau*

**PHYSICS - VERYYYY IMPORTANT!!!**

VERY IMPORTANT FOR A PHYSICS PRESENTATION.. PLEASE HELP & EXPLAIN CLEARLY??? THANKS SO MUCH! (a) why is the centripetal force neede to keep a body moving in a circular path? (b) In what direction does a centripetal force accelerate the body on whic it acts?? (c) Upon what ...
*January 14, 2007 by Silvia*

**Physics(URGENT!!!!)**

A ruler stands vertically against a wall. It is given a tiny impulse at Î¸=0âˆ˜ such that it starts falling down under the influence of gravity. You can consider that the initial angular velocity is very small so that Ï‰(Î¸=0âˆ˜)=0. The ruler has mass m= 100 g and length l= 35...
*December 9, 2013 by keitanako*

**Physics**

A(n) 160 g block is pushed by an external force against a spring with spring constant of 1260 N/m until the spring is compressed by 11.8 cm from its uncompressed length. The compressed spring and block rests at the bottom of an incline of angle θ = 39.0°. Note that the ...
*October 25, 2014 by Kristy *

**Science**

A fixed, single pulley that is used to lift a block does which one of the following? A. doubles the force required to lift the block B. decreases the force required to lift the block C. makes the block easier to lift by changing the direction of the force needed to lift it D. ...
*April 10, 2013 by Cassie*

**Physics 221**

1. throughout a time interval, while the speed of a particle increases as it moves along the x axis, its velocity and acceleration might be: A. positive and negative, respectively B. negative and positive, respectively C. negativa and negative, respectively D. negative and ...
*August 26, 2007 by Joshua*

**Polynomial**

Create a polynomial that describes the perimeter of the outside figure: x + 8, 5, x, x, 2x, x + 8, 34 and inside figure: x + 12.
*December 13, 2010 by Judith*

**Math**

Teresa put tiles marked with the letters of her name into a bag. The back of each tile is blank. The tiles are shown below. T E R E S A Without looking into the bag, Teresa will pick a tile. a. What is the probability that Teresa will pick a tile with the letter T on it? Show ...
*May 5, 2011 by Frances*

**Physics**

A toboggan (with a mass of 15.0 kg) is being pulled by two people who are each holding their own rope, horizontally with an angle 35 degrees off the direction of travel. They are each pulling with a force of 40.0 N, against a friction force of 20.0 N. a) What is the net force...
*October 15, 2010 by Britney*

**physics**

A weight of 30.0 N is suspended from a spring that has a force constant of 180 N/m. The system is undamped and is subjected to a harmonic driving force of frequency 11.0 Hz, resulting in a forced-motion amplitude of 5.00 cm. Determine the maximum value of the driving force. ...
*January 28, 2011 by Ro*

**Math**

A number cube is marked with 1,2,3,4,5, and 6 on its faces. Suppose you roll the number cube one time. Find the probability of each event. #1. P(4) #2. P(4,5, or 6) #3. P(3 or 5) Could someone let me know if these are correct, THANK YOU! #1. 1:6 1/6 1 to 6 #2. 1:2 1/2 1 to 2 #...
*September 14, 2007 by Plshelp*

**software**

A computer company gives a discount of 10 % on a new piece of software. If it makes a profit of 7%, what percent does the marked price exceed the cost price?
*May 4, 2011 by Anonymous*

**math**

Louise is creating a 1-foot long comic strip. If she has marked 0.5 on her paper, what should she do to find 1 foot? Subtract 0.5 Add 0.2 Multiply 0.5 Add 0.5
*March 27, 2012 by destiny*

**Mathematics**

A company purchased 10,000 pairs of men’s slacks for 19.26 per pair and marked them up $22.73. What was the selling price of each pair of slacks? Use the formula S=C+M
*September 8, 2013 by Amy*

**physics**

A window washer uses the chair and pulley arrangement shonw in the figure to lift himself up the side of a building. The window washer's mass is 70 kg and the chair's mass is 10 kg. With what force must he pull down on the rope in order to accelerate upward at
*October 27, 2011 by Anonymous*

**physics**

The mass of a roller-coaster car, including its passengers, is 481 kg. Its speed at the bottom of the track in the figure below is 20 m/s. The radius of this section of the track is r1 = 24 m. Find the force that a seat in the roller-coaster car exerts on a 54-kg passenger at ...
*October 6, 2012 by Anonymous*

**math**

write an equation for the parabola with focus (1,3) and vetex (0,3) See the paragraph Analytic Geometry Equations. You will have a choice of equations, you did not state whether the axis of symettry was parallel to x or y axis. http://en.wikipedia.org/wiki/Parabola that was ...
*August 12, 2007 by Marissa*

**physics**

Astronauts in space cannot weigh themselves by standing on a bathroom scale. Instead, they determine their mass by oscillating on a large spring. Supppose an astronaut attaches one end of a large spring to her belt and the other end to a hook on the wall of the space capsule. ...
*March 31, 2014 by Hannah*

**Physics**

A point charge Q1=-2µC is located at x=0, and a point charge Q2=-8µC is placed at on the x -axis of a cartesian coordinate system.The goal of this problem is to determine the electric field,E(x)=E(x)x^ , at various points along the -axis. (a)What is E(x) (in N/C) for x -68.0 m...
*February 25, 2013 by Anonymous*

**PHYSICS(HELP)**

A small object of mass m= 90 kg slides down a spherical dome of radius R=12 m without any friction. It starts off at the top (polar angle θ=0) at zero speed. Use g=10 m/s2. (See figure) (a) What is the magnitude of the force (in Newtons) exerted by the dome on the mass ...
*November 1, 2013 by Anonymous*

**physics (help)**

A small object of mass m= 90 kg slides down a spherical dome of radius R=12 m without any friction. It starts off at the top (polar angle θ=0) at zero speed. Use g=10 m/s2. (See figure) (a) What is the magnitude of the force (in Newtons) exerted by the dome on the mass ...
*November 1, 2013 by Anonymous*

**physics(help)**

A small object of mass m= 90 kg slides down a spherical dome of radius R=12 m without any friction. It starts off at the top (polar angle θ=0) at zero speed. Use g=10 m/s2. (See figure) (a) What is the magnitude of the force (in Newtons) exerted by the dome on the mass ...
*November 1, 2013 by Anonymous*

**Algebra PLEASE HELP!**

If y varies directly as X and X=88 when Y= 110, find X whaen Y=70 Set up a proportion: 88/110 = X/70. solve for X.
*June 11, 2006 by Nicole*

**math**

can someone correct this for me. Find the constant of variation k. m varies directly with n; m=144 when n = 8 my answer: 144 = k (8) --- ---- 8
*December 22, 2006 by jasmine20*

**Algebra**

The circumference,y, of a circle varies directly with the diameter,x, of the circle. Write an equation if y=44cm when x=14cm.
*May 17, 2010 by Austin*

**math**

Write the variation and find the quantity indicated. F varies jointly as q1 and q2 and inversely as the square of d. If F=12 when q1 =3, q2=9 and 9=3 The variation of F=
*August 27, 2013 by misty*

**Math(Please check)**

Lsit the intercepts and test for symmetry. y^2 - x - 4 = 0 I got (-4,0) and (0,2) for the intercepts. -y^2 - x - 4 = 0 Is not symmetrical to the x axis, correct? y^2-(-x) - 4 = 0 Is not symmetrical to the y axis, correct? -y^2 + x - 4 = 0 Is not symmetrical to the origin, ...
*October 5, 2010 by Hannah*

**Math(Please check! Thank You)**

List the intercepts and test for symmetry. y^2 - x - 4 = 0 I got (-4,0) and (0,2) for the intercepts. -y^2 - x - 4 = 0 Is not symmetrical to the x axis, correct? y^2-(-x) - 4 = 0 Is not symmetrical to the y axis, correct? -y^2 + x - 4 = 0 Is not symmetrical to the origin, ...
*October 5, 2010 by Hannah*

**algebra**

Find the value of y for a given value of x if y varies directly with x if y=2.52 when x=8.4,what is y when x=2.7 thanks
*March 4, 2014 by snow*

**math**

A single card is selected from an ordinary deck of cards. The sample space is shown in the following figure. Find the following probabilities. (Enter the answers either as fractions or as decimals rounded to three places.) P(five of clubs) = 1 P(five) = 2 P(club) = 3 P(jack...
*August 24, 2012 by Anonymous*

**PHYSÝC HELP**

A standard CD has a diameter of 12.0 cm, and a hole that is centered on the axis of symmetry and has a diameter of 1.50 cm. The CD’s thickness is 1.2 mm, and it's mass is 17 g. If a (very thin) pin extending through the hole of the CD suspends it in a vertical orientation, the...
*July 12, 2014 by SUZAN*

**PHYSÝC**

A standard CD has a diameter of 12.0 cm, and a hole that is centered on the axis of symmetry and has a diameter of 1.50 cm. The CD’s thickness is 1.2 mm, and it's mass is 17 g. If a (very thin) pin extending through the hole of the CD suspends it in a vertical orientation, the...
*July 12, 2014 by LOLA*

**physics**

A standard CD has a diameter of 12.0 cm, and a hole that is centered on the axis of symmetry and has a diameter of 1.50 cm. The CD’s thickness is 1.2 mm, and it's mass is 17 g. If a (very thin) pin extending through the hole of the CD suspends it in a vertical orientation, the...
*July 12, 2014 by Lema*

**Physics**

How come a heavy truck and a small car can both travel safely at the same speed around an icy, banked-curve road? I would think that since mass is increased, normal force is therefore increased, and force of friction is therefore increased. And since the opposing force, the ...
*October 19, 2010 by Hannah*

**Physics helppp**

The figure below shows an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 80 N on the wall to which it is attached. The tensions in the shorter cords are T1 = 45.0 N, T2 = 37.3 N...
*July 13, 2010 by Sam*

**grammar - showed versus shown**

Which is the following sentences is grammatically correct? "She had shown me so much about love." "She had showed me so much about love." Thanks, Leo (webmaster)
*September 27, 2007 by Leo*

**Math**

Triangle ABC has ∠A=40∘, ∠B=60∘, ∠C=80∘. Points M,N trisect the side BC and points P,Q trisect the side AC. The lines AM,AN,BP,BQ intersect at the points S,T,U,V as shown in the figure below, dividing the triangle into 9 regions. Determine ...
*June 14, 2013 by Bob*

**Mathematics**

Triangle ABC has ∠A=40∘, ∠B=60∘, ∠C=80∘. Points M,N trisect the side BC and points P,Q trisect the side AC. The lines AM,AN,BP,BQ intersect at the points S,T,U,V as shown in the figure below, dividing the triangle into 9 regions. Determine ...
*June 16, 2013 by Steve*

**Physics**

A 54 kg box is being pushed a distance of 7.0 m across the floor by a force P whose magnitude is 153 N. The force P is parallel to the displacement of the box. The coefficient of kinetic friction is 0.25. Determine the work done on the box by frictonal force.
*October 14, 2008 by Brandon*

**Physics**

A 54 kg box is being pushed a distance of 7.0 m across the floor by a force P whose magnitude is 153 N. The force P is parallel to the displacement of the box. The coefficient of kinetic friction is 0.25. Determine the work done on the box by FRICTIONAL FORCE.
*October 14, 2008 by Brandon*

**Physics Please check my answers**

It's possible for a body to have both rotational and translational motion at the same time. True. << False. 2. The moment of inertia of an object would be different on the surface of the earth than on the surface of the moon. True. << False. 3. The moment of ...
*February 3, 2014 by Chelsea*

**physics**

Two protons and two positrons form a square as shown in the figure. All the particles are initially at rest. Due to Coulomb's repulsion, the particles fly off to infinity. Determine the ratio vp/ve where vp and ve are the final velocities of the protons and positrons, ...
*February 21, 2013 by raj*

**Math**

draw the following parabola: a. principal axis parallel to x; LR=1; passing through (3,1) and (-5,5); opens to the right. b. principal axis parallel to x; passing through (0,4), (0,-1) and (6,7)
*August 13, 2014 by Tsunayoshi*

**AL**

The instructions to my book work says for the data in each table, tell whether y varies directly with x. If it does write an equation fo rthe direct variations. Well how do you do that exactly. Thanks you for your help.. Please help me.
*May 12, 2009 by Math*

**Statistics**

The high temperature X (in degrees Fahrenheit) on January days in Columbus, Ohio varies according to the Normal distribution with mean 21 and standard deviation 10. the value of P(X<10)is?
*March 13, 2010 by Anonymous*

**Statistics**

The high temperature X (in degrees Fahrenheit) on January days in Columbus, Ohio varies according to the Normal distribution with mean 21 and standard deviation 10. the value of P(X<10)is?
*March 13, 2010 by Anonymous*

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