Monday
May 30, 2016

Homework Help: Science: Physics

Recent Homework Questions About Physics

Physics
A rock dropped into a pond produces a wave that takes 15.9 s to reach the opposite shore, 31.8 m away. The distance between consecutive crests of the wave is 3.1 m. What is the frequency of the wave?
Tuesday, May 10, 2016 by Abby

Physics
A particle executes SHM such that at a given time it is at x= +1/4 the amplitude, moving away from equilibrium, and 0.7 seconds later the particle has -1/6 the maximum speed moving away from equilibrium. Find the period of the motion.
Tuesday, May 10, 2016 by Anonymous

Physics
Arrange the steps required to focus a compound light microscope on low power in the correct order. Then write the numbers for the steps in the blanks. 1. Viewing from the side, raise the stage so that the slide almost touches the lens. 2. Move the low power objective lens into...
Tuesday, May 10, 2016 by HELP ASAP

Physics
Arrange the steps required to focus a compound light microscope on low power in the correct order. Then write the numbers for the steps in the blanks. 1. Viewing from the side, raise the stage so that the slide almost touches the lens. 2. Move the low power objective lens ...
Tuesday, May 10, 2016 by Hanny

Physics
The human egg cell above is magnified using a 10´ ocular lens and a 40´ high power objective lens. (a) Calculate the overall magnification. (b) If the field of view at high-power magnification is 400 mm, calculate the size of the field of view when the ...
Tuesday, May 10, 2016 by HELP ASAP

Physics
An engine rated at 5.0x10^4 watts exerts a constant force of 2.5x10^3 newtons on a vehicle.determine the average speed of the vehicle.
Tuesday, May 10, 2016 by Sam

Physics
Find the speed of a pendulum bob at the bottom of its swing if its initial displacement is 5.34o and its period is 2.534 s.
Tuesday, May 10, 2016 by Supansa

Physics
At time an object of mass 50.34 g on the end of a horizontal spring is moving to the right at 10 cm/s and is displaced 2 cm to the left from the equilibrium position. If the spring constant is 0.234N/m, find an expression for the position of the particle as a function of time.
Tuesday, May 10, 2016 by Supansa

PHYSICS
A 6.00g bullet is fired horizontally into a 1.50kg wooden block resting on a horizontal surface. The coefficient of kinetic friction between block and surface is .30. the bullet remains embedded in the block, which is oserved to slide .25m along the surface before stopping. ...
Tuesday, May 10, 2016 by PETER

physics
A display sign is supported by a guy making an angle of 37o with the horizontal and by a bracket at the upper end near the vertical wall. The sign weighs 150N. Find A. The tension in wire B. The force exerted by the bracket on the sign.
Tuesday, May 10, 2016 by Chansa

Physics
a worker on the roof of a building that is under construction dropped a 0.125 kg wrench over the edge. another workman on the 8th floor saw the wrench go by and determined that its speed at that level was 33.1 m/s. the first floor of the building is 12.0m high and each ...
Monday, May 9, 2016 by lomonoyan

PHYSICS HELP Harmonic Motion
A 32.0 kg block at rest on a horizontal frictionless table is connected to the wall via a spring with a spring constant k= 32.0 N/m. A 2.00E-2 kg bullet travelling with a speed of 5.500E+2 m/s embeds itself in the block. What is the amplitude of the resulting simple harmonic ...
Monday, May 9, 2016 by Sam

Physics
Lightning strikes a hilltop that you can see, but do not know the distance to. If the thunder takes 10.52 seconds to reach you and the speed of sound in air is 340. m/s, how far away is the hilltop?
Monday, May 9, 2016 by person

Physics
A muzzleloading cannon has a maximum projectile velocity of 300. m/s. If the speed of sound in air is 340. m/s and the target is 1200. m away from the cannon, how much warning will the target have, assuming that it can't see the cannon?
Monday, May 9, 2016 by person

Physics
A rifle with a muzzle velocity of 1170. m/s is fired at a target that is 600. m away. If the speed of sound in air is 340. m/s, how long after the shot strikes the target will the sound of the rifle firing reach the target?
Monday, May 9, 2016 by original name

Physics
a worker on the roof of a building that is under construction dropped a 0.125 kg wrench over the edge. another workman on the 8th floor saw the wrench go by and determined that its speed at that level was 33.1 m/s. the first floor of the building is 12.0m high and each ...
Monday, May 9, 2016 by lomonoyan

Physics
After 10 years, a 100 mg sample of argon-42 has decayed to 81 mg. estimate the half life of argon-42. I'm on the last part 0.81=2^-10/h please help I don't know what to do from here it's kind of different
Monday, May 9, 2016 by Lomonoyan

physics
a box (mass = 12 kg ) is going south at 12 m/s. A second box (mass = 18 kg ) is going northwest at 15 m/s. they collide and stick together. what is their common velocity (magnitude and direction ) after the collision
Monday, May 9, 2016 by mike

physics
Three point charge of 2NC 7NC and - 4NC are located at the corners of an equilateral triangl as shown below. Caculate the magnitude and direction of the net force on the 7uc charge.
Monday, May 9, 2016 by james

physics
Three point charge of 2NC 7NC and - 4NC are located at the corners of an equilateral triangl as shown below. Caculate the magnitude and direction of the net force on the 7uc charge.
Monday, May 9, 2016 by james

Physics
An object of weight W hangs by three ropes as shown above. What is the value of the angle @ if T1 = T2 = W? ____________ \@ @/ T2\ /T1 \__/ |W| a) 15 b) 30 c) 40 d) 45 e) 60
Monday, May 9, 2016 by Tyler

physics
A fire hose a stream of water at an angle of 35degree above the horizontal. The water leaves the nozzle with a speed 25m/s. Assuming that the water behave like a projectile ,how far from a building should the fire hose be located to hit the highest possible fire?
Monday, May 9, 2016 by afika

physics
Calculate the angular momentum of the Earth the arises from its spinning on its axis. Also calculate the angular momentum of the Earth that arises from its orbital motion around the sun. Please help I'm stumped on a take home test.
Sunday, May 8, 2016 by nouh

physics
The radius of a roll of paper is 7.6 cm and its moment of inertia is I = 2.9 × 10^3 kg·m2. A force of 3.2 N is exerted on the end of the roll for 1.3 s, but the paper does not tear so it begins to unroll. A constant friction torque of 0.11 m·N is exerted on...
Sunday, May 8, 2016 by Anne

physics
A soccer player kicks the ball toward a goal that is 16,8m in front of him . The ball leaves his foot at a speed of 16,0m/s and an angle 28,0degree above the ground.Find the speed of the ball when the goalie catches it in front of the net?
Sunday, May 8, 2016 by afika

physics
A drives straight off the edge of a cliff that is 54m high.the police at the scene of the accident obseve that the point of impact 130m from the base of the cliff.How fast was the car traveling when it went over the cliff?
Sunday, May 8, 2016 by afika

physics
Oasis B is 8.0 km due east of oasis A. Starting from oasis A, a camel walks20 km in a direction 15.0° south of east and then walks32 km due north. If it is to then walk directly to B, (a) how far and (b) in what direction (relative to the positive x-axis within the range...
Sunday, May 8, 2016 by bea

physics
a uniform beam with a weight of 51.3 N and a length of 3.23 m is hinged at its lower end, and a horizontal force Upper F Overscript right-arrow EndScripts of magnitude 64.0 N acts at its upper end. The beam is held vertical by a cable that makes angle θ = 20.7° with ...
Sunday, May 8, 2016 by bert

Physics
A 70 kg student holds a 2.0 kg mass in each hand and is sitting on a stool that can rotate freely about a vertical axis. With the masses held at arm’s length (0.9 m) the student is set spinning at 1.2 revolutions per second. a. If we approximate the student as a uniform ...
Sunday, May 8, 2016 by Rob

Biomechanics/Physics
A 125 pound female is late for her biomechanics final and after arriving dashes up 40 steps each 15cm high in 1.65 seconds to take a seat and start the test. Hint: 1 lb = 4.47N How much work did she perform running up the steps?
Saturday, May 7, 2016 by Frank

Physics
7 g bullet is fired into a 124 g block that is initially at rest at the edge of a frictionless table of height 1.3 m. The bullet remains in the block, and after impact the block lands 2.2 m from the bottom of the table. Find the initial speed of the bullet. The ...
Saturday, May 7, 2016 by Hannah

physics
For the reaction in question 2 above, determine the predicted yield for Mg(OH)2 and H2. What is the actual yield for these products if the percent yield is 80 percent?
Saturday, May 7, 2016 by Darwin

Physics
Three dynamics carts have force sensors placed on top of them.(cart 1, with mass of 2.2 kg, has one sensor --> cart 2, with mass of 2.5 kg, has sensors two and then three --> cart 3, with mass of 1.8 kg, has sensors four then five). Each force sensor is tied to a string ...
Saturday, May 7, 2016 by anon

Physics
An archiolohist begins a trip by first walking 30km southeast from the campsite. He stops and sets up a temporal camp for the night.On the second day, he walks 60 km in direction 60degrees northeas, at which point he discovers the ancient city of gold. (a) detaimine the ...
Saturday, May 7, 2016 by Mathews

Physics
A person walks 25 northeast 3.10km.How far would she have to walk due north and due east to arrive at the same point?
Saturday, May 7, 2016 by Mathews

physics
An archiolohist begins a first trip by first walking 30km southeast from the campsite. He stops and sets up a temporal camp for the night.On the second day, he walks 60 km in direction 60degrees northeast, at which point he discovers the ancient city of gold. (a) detaimine the...
Saturday, May 7, 2016 by Mathews

physics
The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with an acceleration of - 5.6m/s for 4.20s marking straight skid marks 62.4m long ending at the tree.With what speed does the car strike the tree?
Saturday, May 7, 2016 by Mathews

Physics
3 equal charges each of of 2*10-6 C are fixed at three corners of an equilateral triangle ofsides 5 cm.find the column force experienced by one of the charge due to the rest two.
Saturday, May 7, 2016 by Prem

physics
find the initial velocity of a car stop in 10 second by applying breaks the reaction due to break is 2.5 metre per second square
Saturday, May 7, 2016 by Harsh Singh

physics
a truck moving at 100kph has a mass of 27000 kg. what force is necessary decelerate it at rate of -3 m/s²?
Saturday, May 7, 2016 by enjen

Physics
A circuit employs a silicon solar cell to detect flashes of light lasting 0.25 s. The smallest current the circuit can detect reliably is 0.32 μA . Assuming that all photons reaching the solar cell give their energy to a charge carrier, what is the minimum power of a ...
Friday, May 6, 2016 by Joshua

physics
13. A red car of mass m is heading north (direction 0°). It collides at an intersection with a yellow car of mass 1.3m heading east (direction 90°). Immediately after the collision, the cars lock together and travel at in direction 42°. What is the speed of the ...
Friday, May 6, 2016 by Phillip

physics
A convex mirror of focal length 30cm. produces a real and inverted image of magnification 0.5.by how much distance the object should be brought closer to obtain a virtual and erect image of magnification 2?
Friday, May 6, 2016 by kanupriya

physics
A convex mirror of focal length 30cm.produces a real and inverted image of magnification 0.5. By how much distance the object should be brought closer to obtain a virtual and erect image of magnification 2?
Friday, May 6, 2016 by kanupriya

Physics
A uniform rod 2m long has a force 80N applied downward at one end. Another force 6N applied downward at the other end. At what point under the rod should the pivot be placed to keep it in equillibrim?
Thursday, May 5, 2016 by Benjamin

physics
What is the velocity of a projectile with initial velocity 2m/s at an angle of 30degree to horizontal at the time 0.2s,0.5s,0.8s.Find the maximum height attained by projectile,total horinzontal distance travelled,seconds the projectile remains in air?what is the velocity of ...
Thursday, May 5, 2016 by murtem

physics
A firing from the top of the building of height 10m at an angle 30degree to vertical towards ground has the firing velocities of 10m/s.what is the hit velocity?
Thursday, May 5, 2016 by murtem

physics
can u solve this question? When a body hanging from a spring balance is immersed in water it floats just below the surface of water and shows 100g loss in its weight: 1. What is the weight of the body in water , air , upthrust on the body and what is the volume of the body?
Thursday, May 5, 2016 by samar

Physics
When light passes from one medium to another then which of the following parameters may change? Velocity, frequency, colour or wavelenght?
Thursday, May 5, 2016 by Sukriti

physics
A golf ball with a mass of 0.080kg initially at rest is given a speed of 50 m.s-1 when it is struck by a golf club. A) If the club and ball are in contact for 1.5 millisecond (0.0015 seconds), What average force acts on the ball? B) What impulse was delivered? c) What was the ...
Thursday, May 5, 2016 by Rosie

Science (PhYsics)
A tire 0.5m in radius rotates at a constant rate of 200 rev/min. find the speed and acceleration of a stone lodged in the tread of the tire (on its outer edge)
Thursday, May 5, 2016 by Chulu

Physics
A model rocket was launched Amazon man of its height and horizontal distance from launch pad where they can as shown in the table
Thursday, May 5, 2016 by Physics

Physics
A cubical metal box has side L=10.34cm and mass m=150 g. How much mass must be placed inside the box if it is to float in water with its top at the surface?
Thursday, May 5, 2016 by Supansa

Physics
An engineer decides to use a successful dam design for a new lake of the same depth. If the new lake has ten times the surface area as the lake held by the original dam, what, if any, design changes are necessary for the new dam to hold back the increased amount of water? ...
Thursday, May 5, 2016 by Supansa

Physics
A pipe of constant diameter 13.4 cm carries water up a hill 30.34 m high. How much pressure is required at the bottom of the hill if the water is to reach the top?
Thursday, May 5, 2016 by Supansa

Physics
Abby went skiing and was sliding down a 10 degrees hill. Ignore friction and air resistance. What is the x-component of the weight? The mass is 76-kh
Thursday, May 5, 2016 by Anonymous

Physics, Math
A helicopter is in a level flight with an altitude of 4000 feet and a speed of 130 feet/sec. The helicopter drop a bomb with 0 speed relative to the helicopter. How far does the bomb travel horizontally from the launch point to impact with the ground?
Thursday, May 5, 2016 by Alex

physics
Potential energy between charges + q at even places and -q on odd places on the corner of a hexagon of edge lenth 'a'
Wednesday, May 4, 2016 by SUMEDHA

PHYSICS
The volume of a gas is 450 mL when its pressure is 1.00 atm. If the temperature of the gas does not change, what is the pressure when its volume is changed to 2.00 L?
Wednesday, May 4, 2016 by Caleb

Physics
A 4.00-kg block rests on a 30.0° incline. If the coefficient of static friction between the block and the incline is 0.700, what magnitude horizontal force F must act on the block to start it moving up the incline, given g= 9.80m/s^2?
Wednesday, May 4, 2016 by Justin

Physics
A mass of 20 kg is held 1.20 107 metres above the surface of a planet that has a radius of 1.50 107 metres and a mass of 4.50 1028 kg. a) If the mass were to be dropped freely to hit the surface of the planet, with what velocity would it collide with the planet? Please help...
Wednesday, May 4, 2016 by Kia

Physics
a)In the series circuits, what do you notice about the voltage across each resistor compared with the voltage of the battery? (There could be more than one answer) 1.The resistor voltages multiplied together give the battery's voltage 2.The resistor voltages subtract to ...
Wednesday, May 4, 2016 by Mariah

physics
A 5kg object placed on a frictionless, horizontal table connected to a string that passes over a pulley and then is fastened to a hanging 9kg object. Draw a free body diagram of both the objects. Find the acceleration of the two objects and the tension in the strings.
Wednesday, May 4, 2016 by Chansa

physics
A bag of cement of weight 325N hangs from wires as Shawn. Two of the wires make angels al=60 degrees a2=50 degrees with the horizontal. If the system is in equilibrium find the tension T1, T2 and T3 in the wires.
Wednesday, May 4, 2016 by Chansa

physics
A tire 0.5m in radius rotates at a constant rate of 200 rev/min.find the speed and acceleration of a stone lodged in the tread of the tire ( on its outer edge)
Wednesday, May 4, 2016 by Chansa

physics
A person walks 25 northeast for 3.10km.how far would she have to walk due north and due east to arrive at the same location?
Wednesday, May 4, 2016 by Chansa

physics
An archaeologist begins a trip by first walking 30km southeast from the campsite. He stops and sets up a temporal camp for the night. On the second day, he walks 60km in direction 60 degree north of east, at which point he discovers the ancient city of gold. a) Determine the ...
Wednesday, May 4, 2016 by Chansa

physics
The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with an acceleration of -5.6m/s for 4.20s marking straight skid marks 62.4m long ending at the tree with what speed does the car strike the tree?
Wednesday, May 4, 2016 by Chansa

physics
A Zambian Air Force jet lands with a speed of 100m/s and can accelerate at maximum rate of -5m/s as it comes to rest (a) from the instant the jet touches the runway, what is the minimum time needed before it can come to rest. (b) can the jet land on the small piece of inland ...
Wednesday, May 4, 2016 by Chansa

physics
A fundamental law of motion states that the acceleration of an object is directly proportional to the resultant force exerted on the object and inversely proportional to the mass.if the proportionality constant has no dimensions, determine the dimensions of forces?
Wednesday, May 4, 2016 by Chansa

physics
show the expression v=at is dimensionally correct where v represents speed an acceleration and t is instant time?
Wednesday, May 4, 2016 by Chansa

physics
Doyle goes bowling with a cement brick to improve his score. If the brick has a mass of 1.5kg and an initial speed of 5.0m/s upon release a)how much kinetic energy did it possess upon release i.e. when let it go and b)how far will the brick slide before coming to a halt if the...
Wednesday, May 4, 2016 by Rosie

Physics
Suppose that two concentric rings, each with equal mass per unit length are joined so that they rotate together. Find the moment of inertia.
Wednesday, May 4, 2016 by John

PHYSICS
Why do objects gain mass while approaching the speed of light
Wednesday, May 4, 2016 by STEVIUM

Physics
A steel cable of diameter 15mm supports a lift of total mass 1500kg. If the maximum safe working stress for steel is 10^8 N/m^2, calculate how the lift was moving when the wire broke
Wednesday, May 4, 2016 by Bob

physics
on the road with Kate. If she is driving a 2500kg car going 75km/h a)how much kinetic energy will it process. b)She asks "How high would I have to lift the car for the same amount of potential energy"? converting 75km/h to m/s
Wednesday, May 4, 2016 by Annie

Physics
A sprinter has an average speed of 10.2 m/s. What distance, in meters, would the sprinter run in 9.80 s? (Record your answer to the correct number of significant digits)
Wednesday, May 4, 2016 by HELP ASAP

physics
Tom exerts a force of 75N horizontally to a skateboarder, Steven's mass is 65kg, for a distance of 2.0m on a frictionless floor. A)How much work did Tom do on Steve? B) What was Steven's final speed?
Wednesday, May 4, 2016 by Rosi3

physics
Kati observes a force of 15N stretch a spring a distance of 0.450m. A) What is the elasticity coefficient of the spring and B) how much force must be done to stretch the spring a distance of 0.750m? a) F=kx k=33.3N ? b)???
Wednesday, May 4, 2016 by help please

Physics
A runner runs 2.5 km eastward and turns northward to cver twice this distance. What is his displacement ?
Wednesday, May 4, 2016 by Jona

physics
a car starts from rest and attains a velocity of meter/sec,then acceleration changes and it aquires the velocity of 20meter/sec in next 5sec .then it slows down and comes to rest in next 5sec.draw a velocity-time graph for the given conditions,and find acceleration of 3 given ...
Wednesday, May 4, 2016 by kiran

Physics Please Help!
A small metal ball with a mass of m = 78.9 g is attached to a string of length l = 1.76 m. It is held at an angle of = 44.5° with respect to the vertical. The ball is then released. When the rope is vertical, the ball collides head-on and perfectly elastically with an ...
Tuesday, May 3, 2016 by Kevin

Physics
Two children are playing a game in which they try to hit a small box on the floor with a marble fired from a spring-loaded gun that is mounted on a table. (Image included with problem) The target box is 2.44 m horizontally from the edge of the table. Bobby compresses the ...
Tuesday, May 3, 2016 by Kevin

Physics
An organ pipe that is open a t both ends has a fundamental frequency of 382 Hz. What is the length of an closed end pipe that has a fundamental frequency exactly one octave higher? Report your answer in m.
Tuesday, May 3, 2016 by Noah

Physics
Consider an archery bow as behaving like a spring with a spring constant of 493 N/m. If an archer pulls the bowstring back for a distance of 42 cm, what is the elastic potential energy of the "loaded" bow? If the mass of the arrow is 39 grams, what is its speed as it...
Tuesday, May 3, 2016 by Kevin

physics
a bullet is fire in a horizontal direction with a muzzle velocity of 300m/s in the absence of air resistance, how far will it have dropped in travely a horizontal distance of(a)20m?(b)40m?(c)60m? how far will it drop in one second
Tuesday, May 3, 2016 by johnson

Physics
During a free kick at a soccer playoff game a 0.5 kg ball at the peak of the kick 14.7 m above the field had a kinetic energy of 34.0 J. How fast was the ball booted by the player on the field?
Tuesday, May 3, 2016 by Dan

Physics
Kati observes a force of 15 Newtons stretch a spring a distance of 0.450m. a) what is the elasticity coefficient of the spring and b) how much force must be done to stretch the spring a distance of 0.750m? a) F=Kx 15=K(0.450) 15/0.450=k 33N=k It seems off to me know sure if ...
Tuesday, May 3, 2016 by Rosie

Physics
A child uses 168 J of work pulling a wagon 25 m up a hill. What is the force exerted on the wagon by the child? (Record your answer to the correct number of significant digits)
Tuesday, May 3, 2016 by Hanny

Physics
A pitcher throws a fast ball with a speed of 45m/s. The ball has a mass of 0.145kg. How much a) kinetic energy is given to the ball and b)What work was done in throwing the ball? Vo=45 m/s Mass= 0.145kg A) KE? KE= 1/2mV^2 A) 1.5x10^2 kg*m/s B) WK=Change in KE but I'm stuck...
Tuesday, May 3, 2016 by Rosie

Physics
A fan pushes a beach ball with a force of 10.0 N. If the work done on the ball is 150 J, the distance the ball will travel is ______ m. (Record your answer to the correct number of significant digits)
Tuesday, May 3, 2016 by Hanny

plz help physics!!!!
A proton is moving in vacuum along a straight path from A to B .It passes point A at the speed of 2000km/s. a)Calculate in J and in eV the kinetic energy of the proton at A. b)Calculate the value of the positive voltage U that should be applied between A and B so that the ...
Tuesday, May 3, 2016 by vicky

Physics
A bead of mass m = 41.5 kg is released from point A which is located 5 m above the ground and slides on the frictionless track as shown in the figure. Determine the beads speed when it reaches point C which is located 2.0 m above the ground
Tuesday, May 3, 2016 by Dan

Physics
A 3.1 kg pendulum bob hangs from a 2 meter string. It is pulled to the side, position A, so that the bob is 98 cm (h on the sketch) above the lowest position, position C. The bob is released and begins to swing. What is its potential energy after it has swung to position B, 34...
Tuesday, May 3, 2016 by Dan

Physics
A point mass m = 115 g hangs from a string of length l = 1.07 m. Calculate the value of v, the initial speed m should be given at the bottom, so that the string reaches a maximum angle of = 31.4°?
Tuesday, May 3, 2016 by Dan

Physics
Consider an archery bow as behaving like a spring with a spring constant of 493 N/m. If an archer pulls the bowstring back for a distance of 42 cm, what is the elastic potential energy of the "loaded" bow? If the mass of the arrow is 39 grams, what is its speed as it...
Tuesday, May 3, 2016 by Kevin

Physics
By how much will a 1.52 kg object stretch a spring that is suspended vertically if the spring constant is 135 N/m? The object is pulled straight down by an additional distance of 25.4 cm and released from rest. Find the speed with which the object passes through its original ...
Tuesday, May 3, 2016 by Kevin

Physics
Use the following information to calculate the speed of a ball in a pinball machine at a specific location. The ball is launched by using a spring (k = 700 N/m) compressed by 8.5 cm. Consider the starting position of the ball to be its location when the spring is compressed. ...
Tuesday, May 3, 2016 by Kevin

Physics
A bullet (m = 0.0250 kg) is fired with a speed of 94.00 m/s and hits a block (M = 2.20 kg) supported by two light strings as shown, stopping quickly. Find the height to which the block rises. Find the angle (in degrees) through which the block rises, if the strings are 0.200 ...
Tuesday, May 3, 2016 by Kevin

Physics
A fan pushes a beach ball with a force of 10.0 N. If the work done on the ball is 150 J, the distance the ball will travel is ______ m. (Record your answer to the correct number of significant digits)
Tuesday, May 3, 2016 by Hanny

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