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December 20, 2014

Search: kinematics

Number of results: 93

Physics
Which of the following best describes kinematics? a) Kinematics is a part of mechanics that involves the description of motion. b) Kinematics is the branch of physics that deals with the motion of objects and the action of forces on the objects. c)Kinematics is the study of ...
September 14, 2012 by Kevin

Physics - urgent ; test Monday
Divers entertain tourists in Punta Cana by diving froma cliff 36 meters above water. Determine the landing speed; ignore air resistance and assume the object starts from rest. I'm supposed to be using kinematics formulas. I tried using d=V(i)t+1/2at^2 and then plussing the ...
February 21, 2009 by Li

physics
A door starts from rest and swings with an angular acceleration, alpha, α = 6 rad/s2, where t is in seconds. Determine the angle in radians through which the door turns in the first 3 s. Hint: kinematics equation for angular position (i.e., angle) is exactly the same as ...
March 1, 2011 by Anonymous

physics
A door starts from rest and swings with an angular acceleration, alpha, α = 6 rad/s2, where t is in seconds. Determine the angle in radians through which the door turns in the first 3 s. Hint: kinematics equation for angular position (i.e., angle) is exactly the same as ...
March 2, 2011 by Anonymous

Physics
How do I determine the horizontal distance traveled by water passing through a hole of a punctured water bottle. You must use bernoulli's and Kinematics, and find delta x in term of h and y. ( y = the height of water inside the bottle , h = the height of the hole to the floor...
August 13, 2011 by AfterLife

kinematics
these are two similar kinematics maths question which i dont know. Please help! 1)A particle moves in a straight line so that its distance, s metres, from a fixed point O is given by s = 2t^3 - 3t^2 - 12t + 6, where t is the time in seconds after passing O. Find the minimum ...
June 19, 2009 by zachary

Kinematics
A car has an acceleration of 2 m/s2. What is its speed 3 seconds after it starts moving?
February 1, 2011 by Randy

kinematics
A tennis ball is hit with a resultant velocity of 70 m/s^-1 at 20 degrees. What are the vertical and horizontal velocities?
April 17, 2011 by Madeline

physics
The vertical leap of a professional NBA athlete is reported to be 47.3 inches. What is his takeoff speed? in m/s? is this kinematics??
December 10, 2009 by Jan

physics
My teacher needs us to formulate a question for the science fair. Till now, we have only learned the Kinematics equations, HELP, please....
November 5, 2013 by Lily Gomez

Kinematics
A car traveling with a velocity of 4 m/s accelerates at 3 m/s^2(squared) for 10 s. How far does the car travel in the 10s?
June 10, 2012 by Anonymous

Physics
Rearrange the following kinematics equation for the variable iondicated: a)d=v1t+1/2at^2 i)v1 ii)a b)d=v2t-1/2at^2 i)v2 ii)a
September 19, 2007 by Katie

kinematics
An individual's arm segment is .18m long and has an angular velocity of 117degrees/s. What is the tangential velocity of the wrist?
November 4, 2009 by Dawn

Physics (Kinematics)
A race car accelerates uniformly from 10 m/s to 50 m/s in 2 seconds. Determine the acceleration of the car and the distance traveled.
August 13, 2013 by Ashley

Physics
In physics, how do you solve for the magnitude in 2-D kinematics and what are the x and y-components?
September 27, 2011 by Astrogirl

Physics (Kinematics)
A car starts from rest and accelerates uniformly for 10 seconds over a distance of 200 m. Determine the acceleration of the car.
August 13, 2013 by Ashley

physics
If the angular quantities θ,ω,α were specified in terms of degrees rather than radians, how would the kinematics equations for uniformly accelerated rotational motion have to be altered?
April 11, 2010 by Charlie

Physics (Kinematics)
A ball is thrown 83.3 m upward and then falls back to earth.Neglecting air resistance, how long will it be in the air? The acceleration of gravity is 9.8 m/s2 . Answer in units of s
October 6, 2012 by Joy

Physics (Kinematics)
An airplane accelerates down a runway at 100 m/s2 for 15 s until it finally lifts off the ground. Determine the distance traveled before take-off.
August 13, 2013 by Ashley

Physics kinematics
the general "hang time" of a punt is measured to be 4.5sec. if the ball was kicked @ an angle of 63deg. above the horizontal & was caught @ the same level from which it was kicked, what was its initial speed?
March 13, 2008 by Lisa

Physics
If a lever has a mechanical advantage of 6, and the distance from the fulcrum to the load is .05m, how far is it from the fulcrum to the effort? I think I'm supposed to use some sort of kinematics formula, but I'm really confused.
September 27, 2008 by Hannah

Physics
This is a two-dimensional kinematics question: A particle's position coordinates (x,y) are (2m, 3m) at t=0; (6m, 7m) at t=2s, and (13m, 14m) at t=5s. Find the average velocity vector between t=0s and a) t=2s, b) t=5s. I don't know how to find this without acceleration being ...
September 10, 2010 by Anonymous

Physics
A 400 kg baby grand piano is raised to the roof of a 100 m building. If the cable breaks as it reaches this height, what will its velocity be the instant prior to impact? Use energy considerations and verify using kinematics.
December 8, 2012 by BA

kinematics
A projectile is launched with an initial velocity of 25 m/s at a launch angle of 36 degrees. What is the magnitude of the projectile’s velocity when it is 7.5 m above the ground?
February 6, 2012 by Cody

Kinematics Physics
Please let me know if someone can help with this subject. I have summer school in physics because I did not get the first semester. I am still not getting it. Alyx Yes, we can help you. Post your questions, show your work, and we'll guide you in the right direction.
July 29, 2006 by Alyx

physics
if the angular quantities theta omega and angular acceleration were specified in terms of degrees rather than radians how would the kinematics equations for uniformly accelerated rotational motion have to be altered
February 28, 2011 by luna

physics
if the angular quantities theta omega and angular acceleration were specified in terms of degrees rather than radians how would the kinematics equations for uniformly accelerated rotational motion have to be altered
February 28, 2011 by luna

two dimensional kinematics
If you can throw a stone straight up to a height of 16m, how far could you throw it horizontally over level ground? Assume the same throwing speed and opitimum launch angle.
October 8, 2012 by ringo

Please help me with M1 kinematics!
A particle p is initially at the point (2, 6) in relation to an origin O, and is moving with velocity (3i + j) m/s. It has a constant acceleration (16i + 24j)m/s^2. Show that after 2 seconds it is moving directly away from O and find its speed at that time
February 26, 2012 by Jat

Please help me with M1 kinematics!
A particle is travelling with velocity (4i+5j)m/s. It undergoes an acceleration of magnitude 2.5m/s^2 in a direction given by the vector (3i-4j). Find the velocity and displacement of the particle from its initial position after 4s.
February 26, 2012 by Jat

physics- Kinematics-Conversions
Preform the following conversions. 1)27 ft. is how many cm? 2)10 stone/day is how many lbs/min? 3)53 pits/hr is how many steps/day? if someone could even explain how to do it i'd be really greatful thanks !
June 10, 2012 by yasmeen

Physics Kinematics
A short-putter throws the shot with an initial speed of 16 m/s at a 32.0 degree angle to the horizontal. Question: Calculate the horizontal distance traveled by the shot if it leaves the athletes hand at a height of 2.05 m above the ground?
June 10, 2012 by Tim Duncan

Kinematics. Newtons Laws
Two objects are in contact on a frictionless surface. A horizontal force is applied to one object as shown in the figure below. Use m1 = 1.2 g, m2 = 254 g and F = 0.7 N to find the force between the two objects.
October 6, 2009 by Natasha

physics
A 1.31 g samara -- the winged fruit of a maple tree -- falls toward the ground with a constant speed of 1.0 m/s (Figure 5-29). I understand that acceleration equals zero, but I dont understand how to find the upward force need to keep the fruit at 1.0 m/s. Is kinematics ...
February 5, 2010 by Ryan

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 ...
April 15, 2013 by Sash

physics- kinematics
General question- when do you use NEGATIVE for 9.8m/s^2? Even when the questions says "an object is thrown up in the air from top of the building, on its way down, it misses the building and falls to the ground below." If you do use a negative value, why is that?
October 2, 2008 by ella

11th matriculation physics kinematics
an aeroplane takes of at an angle of 45deg to the horizontal. If the vertical component of its velocity is 300kmph, Calculate its actual velocity. what is the horizontal component of it velocity?
July 18, 2010 by shruthi

kinematics
A man stands on a slope of 20 degrees.His weight is 65kg. Given that the coefficient of static friction is 1.5, Calculate the maximum angle that the slope can have to the horizontal before he begins to slide. Also how does the pressure on his feet change with the changing ...
March 8, 2012 by dmkp

Physics
This question has to do with kinematics graphing. I CAN NOT REPRODUCE THE GRAPH BUT hope that some help can be given to me with this question. The position versus time for a certain object moving along the x-axis. The object's initial position is -2 m. Find the instantaneous ...
September 4, 2013 by Deawn

physics - uniform circular motion
Explain why the kinematics equations which describe the motion of the object that has constant acceleration cannot be applied to uniform circular motion.
August 23, 2010 by Shaila

calc-kinematics
if a particle moves along a line so that at time t where t [0,pi] its position is given by s(t)=-4cost-t^2/2+10 what is the velocity of the particle when its acceleration is zero? so i found v(t) = 4sint-t a(t)=4cost-1 = 0 solved for t plugged it into v(t) and i got the wrong ...
March 30, 2010 by James

two dimensional kinematics
A jetliner with an airspeed of 1000 kmlhr sets out on a 1500 km flight due south. To maintain a southward direction, however, the plane must be pointed fifteen degrees west of south. Ifthe flight takes 1 00 min, what is the wind velocity?
October 8, 2012 by ringo

Physics: Kinematics
A speed boat moving at 33.7 m/s approaches a no-wake buoy marker 93.3 m ahead. The pilot slows the boat with a constant deceleration of 2.9 m/s 2 by reducing the throttle. How long does it take the boat to reach the buoy? current work done: x = Vot + (1/2)at^2 93.3 = 0(t) + (1...
October 29, 2012 by Michelle

kinematics
a golf club 1.01 m long completes a downswing in .25s through a range of 180Degres. Assume a uniform (constant) angular velocity. What is the tangential velocity of the end of the club? What is the tangential accelration of the end of the club?
November 4, 2009 by anonymous

Physics Changing Acceleration
Derive position, velocity, and acceleration kinematics equations for an object undergoing a changing acceleration? I understand that somehow we need to get (∆a/∆t) as the change in acceleration into the kinematic equations but I really don't know where to start.
September 28, 2013 by K

two dimensional kinematics
A hammer slides down a roof of angle theta (with respect to the ground). It slides along the roof distance D. As it leaves the roof, a height H above the ground, it has velocity in both directions. Find how far from the base of the building the hammer lands.
October 8, 2012 by ringo

Physics
A 200g box is moving on a table with velocity of 23m/s. There is a coefficient of friction of 0.032 between the table an the box. A force pushes the box for 1.2m which increases the velocity to 28m/s. Calculate the force that was applied. How do we solve this using energies ...
April 15, 2013 by Sash

Physics
Tarzan plans to corss a gorge by swinging in an arc form a hanging vine. If his arms are capable of exerting a force of 1400 N on the rope, what is the maximum speed he can tolerate at the lowest point of his swing? his mass is 80 kg and the vine is 4.8 m long. Ok If i\'m ...
September 6, 2009 by Physics

Algebra HELP!
Starting with the kinematics equation x = vot + ˝ at^2, derive an expresion relating the acceleration and initial velocity of an object to two paired position and time measurements. In other words, if an object's position is x1 at t1, find the acceleration a and the inital ...
September 11, 2012 by Jack

Math
Starting with the kinematics equation x = vot + ˝ at^2, derive an expresion relating the acceleration and initial velocity of an object to two paired position and time measurements. In other words, if an object's position is x1 at t1, find the acceleration a and the inital ...
September 11, 2012 by Jack1

Kinematics
A 55.0kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is .300. What horizontal force must be applied to the box for it to start sliding along the surface? Please write out the solution. I am getting an answer of 165N but...
October 5, 2012 by Jaybird

physics kinematics
A red car and green car , identical except for their colours move towards each other in adjacent lanes . At time=0 , the red car is at x=0m and the green car is at x=220m . If the red car has a constant velocity of 20km/h the cars will meet AR x=44.5m and if it has a constant ...
September 13, 2012 by HW HELP THANKS

Kinematics. Newtons Laws
A standard man does reverse curls in a gym. He holds his arms straight, using an overhand grip to hold the bar. If the mass of the bar is given as 127 kg, what is the tension in each of his shoulders? Consider the weight of the arm and the weight of the bar. Note: Use 4.9kg as...
October 6, 2009 by Natasha

Physics
Starting with the kinematics equation x = vot + ˝ at^2, derive an expression relating the acceleration and initial velocity of an object to two paired position and time measurements. In other words, if an object's position is x1 at t1, find the acceleration a and the initial ...
September 11, 2012 by beanstalk1

Physics
Bob jumps from a 2.0 m high table and wants to jump over a 0.85 m radius ball. How fast must Bob move horizontally to not land on the ball? If we use kinematics equations for projectile, the answer is 2.66 m/s; however, with this velocity the person will land on the ball. I ...
September 19, 2012 by Elaine

Physics
I'm having trouble relating Work, with Electric Field, with Kinematics. The question is asking: How fast and what direction is the particle moving, given: Disk: radius = 0.1m, surface charge density = 3.7mC/m2 Particle: 4.5 mC, mass = 75 mg accelerates from a point ...
February 14, 2010 by so CONFUSED!

Thank you Ann (kinematics)
Thank you Ann! I had the equations and really was closing in on the answer... (stopping for 23 s is what really got me confused) in either case, the displacement for a) is 888 m ! Now I'll try to calculate (b). Thank you much! P.S. This is in response to my earlier physics (...
January 31, 2007 by eric (new chem or physics prob. in)

kinematics
A car is travelling on a banked circular racetrack, Given that the track is banked at an angle of 16degree to the horizontal and the radius of the track is 50 metres and there are no friction forces present a) draw a free body diagram of the car b)calculate the linear ...
May 30, 2012 by dmkp

magnets
A proton with a velocity of 2.0 x 10^7 m/s in the horizontal (+x) direction enters a region of uniform magnetic field that is 1 meter wide and points out of the page with a magnitude of 0.05 Tesla. At what angle below the x-axis, in degrees, does the proton's trajectory emerge...
November 20, 2013 by James

Physics, Kinematics
You drive with a constant speed of 15.1 m/s for 23.4 s. You then accelerate for 28.7 s to a speed of 25.8 m/s. You then slow to a stop in 37.1 s. How far have you traveled? I've tried dividing this into 3 parts. 1st- constant speed 15.1m/s*23.4s=353.34 m 2nd-accelerating I ...
December 1, 2011 by Jackie

Physics
A baseball is hit with a velocity of 30 m/s at an angle of 38.2 degrees above the horizontal. An outfielder, who happens to be very good at 2D Kinematics, figures out exactly where its going to land.Knowing he is exactly 8 meters away from the landing point, and that his ...
September 21, 2014 by Anonymous

12U Physics
An object is moving down a ramp that has mu=0.150. It initially starts at (0,1), and the bottom of the ramp is at (sqrt(3),0) Show that the parametric down the ramp are given by: ht tp://img819.imageshack.us/img819/5993/screenhunter03dec061758.gif I know the kinematics ...
December 6, 2010 by Matt

Physics
A steel ball has a mass of 4.0kg and rolls along a smooth, level surface at 62m/s. A) Find its kinetic energy(i got this and its 7688 joules) B)?????-At first, the ball was at rest on the surface. A constant force acted on it through a distance of 22 meters to give it the ...
November 23, 2008 by URGENT!!!!PLEASE

Physics - 2-D kinematics
A soccer ball is kicked with an initial horizontal velocity of 20 m/s and an initial vertical velocity of 16 m/s. I've calculated: Initial Speed: 25.61 m/s Angle: 38.66 degrees Maximum Height it reaches: 13.06 m Distance kicked: 65.29m NOW I NEED: What is the speed of the ball...
February 3, 2012 by Anonymous

Physics
Derive a function that gives the final speed of the cart as a function of the masses, ramp angle and distance up the ramp that the cart moves. Use conservation of energy to do this-no kinematics or Newton's Laws. I have 3 trials ,, 3 angles and 3 masses ( cart moving up the ...
July 22, 2011 by AfterLife

Mechanics, Rigid body
At t = 0 s a flywheel is rotating at 20 rpm. A motor gives it a constant acceleration of 1 rad/s^2 until it reaches 100 rpm. The motor is then disconnected. How many revolutions are completed at t = 21 s? What I've done so far is multiply my 20rpm and 100rpm by (2pi/60) to get...
December 14, 2014 by Marissa

kinematics
An exercise bicycle's flywheel is 30cm in diameter and 2.5 cm thick and is constructed from steel (density=7850 kg m3) its moment of inertia is 0.156 kg m2 about its axis of rotation a) calculate the mass of the flywheel b) calculate the flywheel's radius of gyration c) whilst...
May 30, 2012 by dmkp

Physics
A hot air balloon is ascending straight up at a constnat speed of 7.0 m/s. When th balloon is 12.0 m above the ground, a gun fires a pellet straight up from ground elvel with an initial speed of 30,0 m/s. Along the paths of the balloon and the pellet, there are two places ...
January 2, 2009 by Anonymous

Physics - Kinematics
Need some help with my homework! Question 7 a) Acceleration is the rate of change of velocity Use your definition in (a) to show that v = u + at, where v is the final velocity, u is the initial velocity and a and t are the acceleration and the time interval respectively. State...
April 17, 2012 by Iman

Physics
Use principles of force and kinematics to answer these: a. A 40 kg skater pushes on the 60 kg skater (initially at rest). As they collide, the 40 kg skater pushes on the 60 kg skater, applying a force 100 Newtons for 1.2 seconds. Find the velocity at which each of them ends up...
November 1, 2010 by jen

physics
Use principles of force and kinematics to answer these: a. A 40 kg skater pushes on the 60 kg skater (initially at rest). As they collide, the 40 kg skater pushes on the 60 kg skater, applying a force 100 Newtons for 1.2 seconds. Find the velocity at which each of them ends up...
November 1, 2010 by jen

help me physics
suppose the cart has mass m = 203 g, and it strikes the clay at speed vo = 5.24 m/s and comes to a dead stop. Assume the track is frictionless, and the clay is crushed inward by 1.83 cm. a)Find the magnitude of the impulse exerted by the clay on the cart. 1 N-m i got this ...
November 1, 2010 by jason

Physics
A coin is dropped from rest into a well with water 45.0m below the hand that drops the coin. A) How much time passes between the release of the coin and its contact with the water? B)How fast will the coin be going when it lands in the pool? C)How long after the release of the...
June 28, 2007 by Bob

Physics
Speedy Sue during is driving at 30.0m/s and enters a 1 lane tunnel. She then observes a slow moving van 155m ahead traveling at 5.0m/s. She applies the brakes but can only accelerate at -2.0m/s^2 b/c road is wet. a) will there be a collision? How do you know? b) If there is a ...
September 24, 2007 by ~christina~

Physics
A tower clock has an hour hand 2.70 m long with a mass of 60.o kg, and a minute hand 4.50 m long with a mass of 100 kg. Calculate the total rotational kinetic energy of the two hands about the axis of rotation. Sol: I know that Kr = 1/2Iw^2 or moment of inertia * omega squared...
April 18, 2007 by Anderson

physics
Two masses are connected by a string. Mass A is on a flat roof and mass B is hanging over the edge of the roof. The mass on the roof is 15 kg and the hanging mass is 5 kg. The edge of the roof is 100 m above the ground. The two masses are initially at rest with the hanging ...
November 18, 2010 by Anna

physics
A merry-go-round is stationary. A dog is running on the ground just outside its circumference, moving with a constant angular speed of 0.705 rad/s. The dog does not change his pace when he sees what he has been looking for: a bone resting on the merry-go-round one third of a ...
March 1, 2011 by Anonymous

Kinematics algebra question - Physics 11
I don't know how to even approach this... It's suppose to be on my physics test. A huntsman fires a gun pointing at a monkey hanging on the branch of a tree. The huntsman and the base of the tree are on a flat horizontal. At the moment the huntsman fires the gun, the monkey ...
November 8, 2013 by Raylene

two dimensional kinematics
A freight train is moving at a constant speed of Vt. A man standing on a flatcar throws a ball into the air and catches it as it falls. Relative to the flatcar, the initial vellocity of the ball is Vib straight up. a. What are the magnitude and direction of the initial ...
October 8, 2012 by ringo

KINEMATICS (PHY)
A pulley of mass mp , radius R , and moment of inertia about the center of mass Ic=12mpR2 , is suspended from a ceiling. The pulley rotates about a frictionless axle. An inextensible string of negligible mass is wrapped around the pulley and it does not slip on the pulley. The...
November 12, 2013 by rickross

KINEMATICS (PHY)
A turntable is a uniform disc of mass m and radius R. The turntable is initially spinning clockwise when looked down on from above at a constant frequency f0. The motor is turned off at t=0 and the turntable slows to a stop in time t with constant angular deceleration. (a) ...
November 12, 2013 by rickross

Physics - Kinematics
Qn: Ball 1 is launched up an inclined plane from the bottom of the plane with an initial speed that is the minimum speed for it just to reach the top of the plane. At the same moment as ball 1 is launched up the plane, Ball 2 is released from rest at the top of the plane. They...
November 25, 2010 by Rod

physic
A police officer arrives at the scene of the collision of the two snowmobiles (Figure 1) to find both drivers unconscious. When the two vehicles collided, their skis became entangled and the two snowmobiles remained locked together as they skidded to a stop. One driver was ...
April 2, 2007 by sam

Physics 12 Kinematics
I'm not really sure how to use the algebra to prove the monkey shouldn't have dropped. Obviously if the hunter aimed the gun directlt at the monkey it wouldn't hit it as gravity would pull it down. A huntsman fires a gun pointing at a monkey hanging on the branch of a tree. ...
November 8, 2013 by Oscar

physics (Kinematics)
A motorist drives north for 35.0 s at 25.0 m/s and then stops for 23.0 s. He then continues north traveling 13.0 m in 2.00 s. (a) What is his total displacement? (b) What is his average velocity (magnitude and direction)? I am just clueless on this one. I don't even know where...
January 31, 2007 by eric

physic
A police officer arrives at the scene of the collision of the two snowmobiles (Figure 1) to find both drivers unconscious. When the two vehicles collided, their skis became entangled and the two snowmobiles remained locked together as they skidded to a stop. One driver was ...
April 2, 2007 by sam

Physics
A cross country team race is about to begin and team Delta decides to use their one-dimensional kinematics knowledge that they learned from their first year physics course. Each team consists of two people and one horse. The clock is started when the team crosses the starting ...
September 12, 2011 by victor

Physics
Well it's an kinematics project and it involves alot of questions. So here goes the problem: Suppose a football was thrown at an angle of 37 degrees with a velocity of 90mi/hr while leaving a quarterback hand at a height of 6'4" above the ground. A)Calculate the maximum height...
April 6, 2010 by Vanessa

11th grade
I really need assistance in starting a project that is due in 2 weeks. I basically need to create a gravity-powered vehicle that will go travel down a ramp, go across the floor 1 meter away and hit a wall. The catch is that there will be a "passenger" (an egg) and a safety ...
December 4, 2009 by Kayla

Physics
2.A 3.65 kg mass is hung from a spring with a k constant of 535.0 N/m. How far does the spring stretch? 3.A 35 kg crate slides from rest down a ramp inclined at 29o onto a spring with a force constant of 4.5 x 102 N/m. The spring is compressed a distance of 0.45 m before the ...
November 12, 2011 by holly

physics kinematics
Physics - Unit V Challenge Problem No matter how bad your day is going, here's proof that things could be A LOT worse. This is a bricklayer's accident report that was printed in the newsletter of the English equivalent of the Workers' Compensation Board. So here, thanks to ...
March 7, 2011 by Diyan

physics kinematics
Physics - Unit V Challenge Problem No matter how bad your day is going, here's proof that things could be A LOT worse. This is a bricklayer's accident report that was printed in the newsletter of the English equivalent of the Workers' Compensation Board. So here, thanks to ...
March 7, 2011 by Diyan

physics kinematics
Physics - Unit V Challenge Problem No matter how bad your day is going, here's proof that things could be A LOT worse. This is a bricklayer's accident report that was printed in the newsletter of the English equivalent of the Workers' Compensation Board. So here, thanks to ...
March 7, 2011 by Diyan

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