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March 23, 2017

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physics
A shuffleboard disc has a mass of 250g. The coefficient of friction between the disc and the floor is .60. A player pushes the disc applying a horizontal force of 5.0 N for .35 s. How much does the disc weight? What is the frictional force between the disc and the floor. What ...
December 13, 2013 by Nil

Physics
A simple pendulum has a period T on the surface of planet Earth. When taken to the surface of planet X, the same pendulum has a period 2T. a) If the radius of planet X is 1/2 the radius of Earth, what is the mass of Planet X, relative to the mass of Earth? b) Suppose a ...
May 15, 2011 by Chan

Statistics
A large corp wants to estimate the proportion of independent contractors who use a certain device. They want to be within 4% of the true proportion when using a confidence interval of 95%. How many contractors must be sampled if no preliminary estimate is available. I came up ...
April 5, 2011 by Heather

Science - Chemistry
A certain elixir is 92 proof. A proof is twice the volume percentage of alcohol in a blend. Ethanol's structural formula is CH3CH2OH with a molar mass of 46 grams/mole. The density is .79 g/ml. How many liters of elixir must one have in order to have 50 moles of carbon?
September 29, 2011 by Ashley

tax
In order for an employee to deduct home office expenses, which of the following must occur? a. There must be no other fixed business location. b. The taxpayer's most important activities must occur in the home. c. The home office must be for the convenience of his or her ...
March 20, 2012 by Andy

math
5. A group of children are playing baseball in a small field. Their baseball diamond is a square with sides 14.1 m. When throwing the ball from home plate to second base how far must it go? Round your answer to one decimal place.
November 9, 2014 by Panzy

Physics
A Ferris Wheel, 24.0 m in diameter, rotates once every 12.5s. What is the fractional change in a person's apparent weight: a) at the top, and b) at the bottom? I need to know if I'm doing this right. Here's my work: Equation Used: Net Force = [(4(pi)^2)(R)(M)] / [T^2] M=mass T...
January 20, 2011 by Ricky

Physics
A contestant in a winter games event pushes a 59.0 kg block of ice across a frozen lake as shown in the figure below. The coefficient of static friction is 0.1 and the coefficient of kinetic friction is 0.03. The block is being pushed at a direction of 23 degrees below the ...
February 17, 2015 by Mariah

Math
Alice requires $10,000 in two years. If the interest rate is 6% and compounded quarterly, how much must Alice place in the account to have the required amount? (a) $ 6,274.10 (b) $ 8,877.10 (c)$ 8,573.40 (d) $ 5,000.00 (e) $ 10,000.00
November 7, 2011 by Anonymous

Math
The planet Neptune is approximately 4.5 * 10^9 kilometers from the sun. The planet Venus is approximately 1.1 * 10^8 kilometers from the sun. Which is the best estimate of how many times as far from the sun Neptune is as Venus? A. about 4 times as far B. about 40 times as far ...
April 11, 2015 by Kimbo

E N G L I S H
Describe one of the strongest images you encountered from any of the following literature wolves of men by barry holstun lopez birches by robert frost haiku by kaga no chiyo haiku by basho spring is like a perhaps land by E.E Cummings from an inconvenient truth by al gore the ...
October 26, 2015 by Kaai97

physics
A hydraulic press has an input cylinder 1 m in diameter and an output cylinder 2 meters in diameter. Assuming 100% efficiency, find the force exerted by the output piston when a force of 10 Newtons is applied to the input piston. pounds If the input piston is moved through 5 ...
April 1, 2012 by Anonymous

math problem
My ID number is quite remarkable.Its a 9 digit number with the digits 1-9 appearing only once. The entire 9 digit nuymber is divisible by 9. If you remove the last digit, the remaining 8 digit number is divisible by 8. If you remove the last digit again, you are left with a 7 ...
September 30, 2006 by Samantha

Algebra
Word problem: Radiator in a certain make needs to contain 50 liters of 40% antifreeze. The radiator now contains 50 liters of 20% antifreeze. How many liters of this solution must be drained and replaced with 100% antifreeze to get the desired strength?
August 5, 2009 by coried

science
a machine gun can fire 20 bullet persecond if speed of bullet is 100m/s and if each bullet weight 100grams calcuate force required to hold the gun in its position
June 30, 2013 by physics

Physics
A body of mass 7.5kg is to be pulled up along a plane which is inclined at 30degree to the horizontal. If the efficiency of the plane is 75%,what is the minimum force required to pull the body up the plane?
January 19, 2016 by Angela

Physics
A skier of mass 70 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 60m up a 30 degree slope (assumed frictionless) at a constant speed of 2.0 m/s? (b) What power must a motor have to perform this task?
October 7, 2007 by Kelly

Sampling Distribution
Sampling Distribution Complete solutions and illustrations are required. 4.The average breaking strength of a certain steel cable is 2000 pounds, with a standard deviation of 100 pounds. A sample of 20 cables is selected and tested. Find the sample mean that will cut off the ...
February 27, 2013 by Tina

Physics
a 1 kg textbook has been pushed and let go sliding to the left on a flat table no one is pushing the book at this moment. it is sliding a. calculate the weight of the textbook? How do I do these calculations? b. based on this weight, what must the normal force from the table ...
October 16, 2016 by Ruth

college physics
In a nuclear reactor, neutrons released by nuclear fission must be slowed down before they can trigger additional reactions in other nuclei. To see what sort of material is most effective in slowing (or moderating) a neutron, calculate the ratio of a neutron's final kinetic ...
March 18, 2010 by Kyle

physics
a 2 kg rabbit starts from rest and is moving at 6 m/s after 3 seconds. What force must the rabbit cause to makes this change in speed?
February 22, 2011 by becky

physics
A bowling ball weighing 40.0 N initially moves at a speed of 4.90 m/s. How long must a force of 54.0 N be applied to the ball to stop it?
October 16, 2011 by Kellie

physics
A bowling ball weighing 40.0 N initially moves at a speed of 4.90 m/s. How long must a force of 54.0 N be applied to the ball to stop it?
October 17, 2011 by klbiesec

physics
A bowling ball weighing 43.0 N initially moves at a speed of 4.90 m/s. How long must a force of 51.0 N be applied to the ball to stop it?
February 24, 2012 by John

Physics
A bowling ball weighing 67.0 N initially moves at a speed of 4.80 m/s. How long must a force of 54.5 N be applied to the ball to stop it?
February 24, 2012 by Anonymous

Chem please help
An object A has half the mass and twice the velocity of object B. How are the kinetic energies of A and B related? A. The kinetic energy of B is 4 times that of A. B. The kinetic energy of B is twice that of A. C. The kinetic energy of A is the same as that of B. D. The ...
November 17, 2014 by Morgan

physics
the sensor in the torso of a crash-test dummy records the magnitude and direction of the net force acting on the dummy. if the dummy is thrown forward with a force of 130.0 N while simultaneously being hit from side with a force of 4500.0 N, what force will the sensor report? ...
November 4, 2008 by i love polka

physics
A 2.3 kg pendulum bob hangs from a 2 meter string. It is pulled to the side, position A, so that the bob is 111 cm (h on the sketch) above the lowest position, position C. The bob is released and begins to swing. See below. What is its potential energy after it has swung to ...
October 16, 2014 by confused

physics
A little girl with a mass of 33 kg jumps on a trampoline that has an elastic constant of 2336 N/m. When she jumps onto the trampoline it sinks 81 cm. Assuming that all of the energy of the trampoline launches her into the air, how far will she rise?
January 26, 2015 by Anonymous

Statistics
Billy Isastar, a famous basketball player, is not a very good free throw shooter. He manages to connect on 65% of his attempts. What is the probability that the first free throw Johnny hits in a game is on his fourth attempt? a. .015 b. .028 c. .179 d. .096
March 22, 2017 by Ariel

physics
A proton moves in a constant electric field from point A to point B. The magnitude of the electric field is 6.4 × 10^4 N/C; and it is directed as shown in the drawing, the direction opposite to the motion of the proton. If the distance from point A to point B is 0.50 m, what ...
February 16, 2012 by Daniel

Physics
A 1.4-kg object moves along the x axis, subject to the potential energy shown in the figure. If the object's speed at point B is 1.70 m/s, what are the approximate locations of its turning points? ___________m (left-hand turning point) ___________m (right-hand turning point)
May 2, 2015 by Anonymous

drawing
21) The number of oil spills occurring off the Alaskan coast A) Discrete B) Continuous Find the odds. 22) When a single card is drawn from an ordinary 52-card deck, find the odds in favor of getting a red 10 or a black 6. A) 2: 25 B) 1 : 13 C) 1 : 25 D) 1 : 12 23) If the ...
June 10, 2011 by candy

Chem.
Nitrogen oxide (NO) has been found to be a key component in the many biological processes. It also can react with oxygen to give the brown gas NO2. When one mole of NO reacts with oxygen, 57.0 kJ of heat is evolved. a) Write the thermochemical equation for the reaction between...
January 29, 2007 by Christopher

Science
.Define the following terms and provide a example of each: -atom, - compound, - element, -energy, - photosynthesis, -matter, - decomposition. Write it in your own words. . Explain the forms of energy: radiant, chemical, mechanical, electrical, thermal. . What is a food chain...
October 16, 2014 by Taylor

chem
Consider a sample of 20g of water at -20*C and 1.0 atm. Determine the amount of energy required to raise the temperature of this water to 120*C. (Sice=2.1 Jg-1C-1; Swater= 4.184Jg-1C-1; Ssteam=1.7Jg-1C-1; ΔHfus 6.01 kJ/mol; ΔHvap=40.7 kJ/mol)
May 7, 2015 by carolin

Physics
A 24.00 kg block at rest on a horizontal frictionless air track is connected to the wall via a spring. The equilibrium position of the mass is defined to be at x=0. Somebody pushes the mass to the position x=0.3500 m, then lets it go. The mass undergoes simple harmonic motion ...
November 8, 2014 by Liz

English
1. We went far. 2. We went a long way. 3. The restaurant is far from here. 4. The restaurant is a long way from here. 5. The restaurant is not far from here. 6. The restaurant is not a long way from here. 7. How far is it from here to the restaurant? 8. It is 100 meters...
November 24, 2016 by rfvv

Physics
Judy walks a certain distance due north, then walks twice as far due west. At the end of her trip, the straight-line distance from her starting point to her final position is 112m. a) What is the length of each leg of the trip? b) What is the direction of her total ...
September 25, 2016 by Anonymous

Physics
What is the magnitude of the average force required to stop an 1500kig car in 8.0 s if the care is traveling at 95 km/h? Formula: Sigma F= ma *convert 95km/h to 26m/s Which kinematic equation do I use and for which variable do I use within the equation?
June 11, 2012 by Mr. McKee

Physics of Vehichle
A 1400 kg car rounds a curve of 57 m banked at an angle of 14 degrees If the car is traveling at 98 km/h, will a friction force be required? If so, in what direction? May someone please walk me through this problem step by step? Thank you
June 16, 2012 by Mike Joseph

physics
A proton moves in a constant electric field E from point A to point B. The magnitude of the electric field is 4.2 x10^4 N/C; and it is directed as shown in the drawing, the direction opposite to the motion of the proton. If the distance from point A to point B is 0.18 m, what ...
April 23, 2012 by Anonymous

scientist
What is biomass energy? the chemical energy stored in living things the electromagnetic energy stored in living things the nuclear energy stored in living things the thermal energy stored in living things Not sure what this one could be
April 9, 2012 by kevin

physics
With what minimum speed must you toss a 160 ball straight up to hit the 15 -high roof of the gymnasium if you release the ball 1.7 above the ground? Solve this problem using energy.
October 12, 2009 by Dan

chemistry
According to the following thermochemical equation, what mass of H2O (in g) must form in order to produce 975 kJ of energy? SiO2(s) + 4 HF(g) → SiF4(g) + 2 H2O(l), ΔH°rxn = -184 kJ
June 14, 2011 by Amber

physics
The rope of a swing is 3.2 m long. Calculate the angle from the vertical at which a 95-kg man must begin to swing in order to have the same kinetic energy at the bottom as a 1500-kg car moving at 1.07 m/s (2.39 mi/hr).
March 11, 2012 by Katie

chemistry
in a freezer, 150g of water at 0degrees celcius is placed in an ice cube tray. how much energy, in kilocalories, must be removed to form ice cubes at 0 degrees celsius
January 23, 2014 by bee

Physics 203
Car 1 has 6 times the mass of car 2, but only 0.4 as much kinetic energy. What is the ratio between the speeds of the two cars (v1/v2)? You must type your answer as a numerical value.
October 8, 2014 by Peter

physics
The rope of a swing is 3.1 m long. Calculate the angle from the vertical at which a 77-kg man must begin to swing in order to have the same kinetic energy at the bottom as a 1430-kg car moving at 1.05 m/s (2.35 mi/hr).
November 5, 2014 by Jina

Criminal Justice
Create a checklist that may be provided to the officers involved in the operation so they may have a reference reminding them of what they must do to properly process a defendant in a federal investigation. The checklist should include processing requirements and the mandated ...
November 1, 2007 by Luke Phillips

POL 201
If Americans were said to have a positive liberty to work, then the government (Points : 1) may not prevent one from working. is required to provide jobs to those that cannot find jobs. may never pursue a policy that leads to unemployment. must prohibit discrimination in the ...
November 3, 2014 by Jo

PHYSICAL SCIENCE
A 0.50-KG BLOCK INITIANALLY ON A REST ON A FRICTIONLESS HORIZONTAL SURFACE IS ACTED UPON BY A FORCE OF 8.0N FOR A DISTANCE OF 4.0M. HOW MUCH KINETIC ENERGY DOES THE BLOCK GAIN?
September 7, 2010 by LESLIE

physics
a wieght of 10kg mass is raised through a hieght of .8 meter from 1.5 meter to 2.3meter against force of gravity.how much energy isrequired in cals.
January 11, 2011 by ajmer singh sidhu

PHYSICS
A force 1 Mega-dyne is forced agaist a running body to stop it.If the kinetic energy of the body is 1 Joule,then how much distance it will go before stopping?
March 2, 2013 by BIKRAMADITYA

physics
Given the same exerted force (130N) exerted over 2s on two javelins of different mass (javelin1 = 1.2 kg; javelin2 = 1.6 kg), what is the kinetic energy of each javelin?
April 9, 2014 by Marcela

statistics
To win at BIG GAME in a certain state, one must correctly select 6 numbers from a collection of 49 numbers (1 through 49). The order in which the selections is made does not matter. How many different 6-number selections are possible, assuming no repetition of numbers? Choose ...
November 13, 2010 by lucky

Physics
Consider the series RLC circuit in which R2<4L/C (underdamped). Assume that at t=0 , the charge on the capacitor has its maximum value. The differential equation obeyed by the potential across the capacitor can be written in the following form d2V/dt2+a*dV/dt+b*V=0 In the ...
May 6, 2013 by rishabh gupta

Physics
A 48 N cart is pulled across a concrete path at a constant speed. A 42 N force is required to keep the cart moving. What is the coefficient of kinetic friction between the path and the cart?
September 29, 2012 by Hanu

algebra II
A moving company charges a flat rate of $85 plus and additional $.17 per mile driven. How far must the company drive to earn @ least $100? Round to the nearest mile.
January 30, 2012 by Henry

Science--Myanswer Plz, plz
Electric charges that are different attract each other. repel each other. **** exist in pairs. do not interact. Magnetic field lines around a bar magnet are only perpendicular to the magnet. spread out from one pole and curve around to the other. **** cross back and forth over...
May 23, 2014 by HeELP ME FAST!!!

Physics
A bolt is to be tightened with a torque of 8.0 N*m. If you have a wrench that is 0.35 m long, what is the least amount of force you must exert? the equation for this problem is t=Fr sinbeta, but the sin is not given What am I suppose to do?
December 6, 2009 by Shawn

Physics
What net braking force must be applied to stop a car with a mass of 900 kg initially travelling at a velocity of 100 km/h within a straight-line distance of 50 m?
July 17, 2010 by Syafiqa

English (poetry)
IV His soul stretched tight across the skies That fade behind a city block, Or trampled by insistent feet At four and five and six o’clock; And short square fingers stuffing pipes, And evening newspapers, and eyes Assured of certain certainties, The conscience of a blackened...
May 19, 2011 by Jess

Physics
1. It takes 190 kJ of work to accelerate a car from 21.0 m/s to 29.0 m/s. What is the car's mass? 2. A 32-kg girl is bouncing on a trampoline. During a certain interval after she leaves the surface of the trampoline, her kinetic energy decreases to 205 J from 435 J. How high ...
March 15, 2011 by Leo

pre calc
You are three miles north and two miles east of a cabin. On what bearing must you walk to reach the cabin? How far are you from the cabin ?
December 8, 2011 by jim

Science
What is the difference between conserving energy and energy efficiency? What are 5 benefits of conserving energy?
June 11, 2014 by Anonymous

english
i will be thankfull to you,if you help me correct my sentences. 1.)complete the sentences with correct form of words: The ball ______(fly)out of his hand like a bullet and______(hit)third slip,who_____(not look),full pitch on the knee cap.With a yell of agony third slip_____(...
March 13, 2013 by ramesh reddy

French
Imagine that you work at a travel agency. Clients ask you what they should pack when planning a trip to certain French-speaking vacation spots during the winter and spring travel seasons. According to the weather report you receive from each city's tourist bureau, select at ...
December 14, 2009 by Anna

Pre-Calculus
A drawbridge is l = 110 feet long when stretched across a river. As shown in the figure below, the two sections of the bridge can be rotated upward through an angle of α = 34°. a)If the water level is 35 feet below the closed bridge, find the distance d between the end ...
February 25, 2016 by Tim

Science (6th grade, but actual 7th grade paper)
We are learning about potential and kinetic energy. There are two ramps. One is short and the other is long. The long one is labeled A, and the short one is labeled B. On which one would a marble go the farthest after touching the ground?
November 30, 2010 by Needs Help

physics
A force of friction of 3.2N acts on a 1.1kg puck while it is sliding along a horizontal surface. If the initial velocity of the puck was 7.5 m/s , how far will the puck travel before coming to rest?
November 7, 2010 by mercedes

physics
A 33 N force acting at 90° and a 44 N force at 60° are applied concurrently at a point P. What is the magnitude and direction of the resultant force?
November 18, 2010 by nic

science
how do the words matter, element, atom, crystal, compound, and molucle relate? Matter is composed of elements which are composed of atoms and molecules and these combine to form compounds that may be crystalline. why do leaves turn water a differnt color Leaves turn a diferent...
January 21, 2007 by 12345

physics
A girl of weight 500 N sits 3m from the fulcrum. how far away is the fulcrum on the other side should a force of 600  N be applied to balance the girl
March 28, 2012 by Anonymous

physics
two charges originally separated by 10cm are moved further apart untill the force between them has decreased by a factor of 10. How far apart are these charges?
April 25, 2013 by radiant

Texans
I had trouble posting a response the first time around. However, thank you to those who responded to my inquiry regarding Texas Pride. Interestingly, I came across a hairdresser who lived in Michigan most of her life. She told me that people in Texas are friendlier and she has...
July 31, 2008 by jules

College Algebra 105
use the rational zero's theorem to list the potential zero's of the polynomial function. Do not attempt to find the zero's f(x)=-169x^7-x^6+x+13 and then the second part is find the potential rational zero's.
December 9, 2013 by Dawn Mason

physical
A 65.0-kg circus performer is fired from a cannon that is elevated at an angle of 55.8 ¡ã above the horizontal. The cannon uses strong elastic bands to propel the performer, much in the same way that a slingshot fires a stone. Setting up for this stunt involves stretching ...
May 24, 2014 by LEHUAN

physics
A 65.0-kg circus performer is fired from a cannon that is elevated at an angle of 55.8 ¡ã above the horizontal. The cannon uses strong elastic bands to propel the performer, much in the same way that a slingshot fires a stone. Setting up for this stunt involves stretching ...
May 24, 2014 by Bin

physics
A ball attached to the end of a string is whirled on a horizontal circle at constant speed. Consider the linear momentum, total energy, and kinetic energy of the ball throughout its motion. Which of the following statements is true? Both linear momentum and kinetic energy are ...
January 6, 2010 by hilary

Physics
If an object weighs 70 pounds and it gets hit by a truck with a force of 7400 N, and there is a frictional force of -35 N, what is the net force?
September 29, 2010 by Geoff

pre calc
you are 7 miles north and 4 miles west of a cabin.how far are you from the cabin? on what bearing must you walk to reach the cabin?
December 8, 2011 by bob

physics
The largest tension that can be sustained by a stretched string of linear mass density μ, even in principle, is given by τ = μc2, where c is the speed of light in vacuum. (This is an enormous value. The breaking tensions of all ordinary materials are about 12 ...
March 2, 2015 by barýþ

physics
A plane starting at rest at the south end of a runway undergoes a uniform acceleration of 1.60 m/s^2 to the north. At takeoff, the plane's velocity s 72.0 m/s to the north. A. What is the time required for takeoff? B. How far does the plane travel along the runway?
September 17, 2009 by Lady12

the big idea of energy
i have to do an assesment about sound. i have to include the big idea of energy. i have no clue what it is! HHEELLPP MMEE!! What do you mean when you say "the big idea of energy"? I know that sound is created by vibrations, but I'm not sure that's exactly what you are looking ...
December 5, 2006 by Anon

PHYSICS
A hollow tube (I = MR2) rolls without slipping along the surface. The ratio of its translational kinetic energy to its rotational kinetic energy is a. 1 b. 2 c. 3 d. 1/2 e. 1/3 I say A becasue both add up to get the total kinetic energy.
April 22, 2009 by Sandy

stretch marks
how do you get rid of them? are they permanent? Apparently stretch marks are permanent although they will fade in time. These sites have more information about them. http://www.kidshealth.org/teen/your_body/skin_stuff/stretch_marks.html http://en.wikipedia.org/wiki/Stretch_marks
July 17, 2007 by JOSE

Science
i posted this earlier, but no one answered. so i'll try again. Can you check my work please? true/false 1.) force is a scalar quantity: *FALSE 2.) the object on which a force acts is called the system: *TRUE 3.)The specific, indentifiable cause of a force is called the system...
December 11, 2012 by Gavin

physics
A 747 jetliner lands and begins to slow to a stop as it moves along the runway. If its mass is 3.50x^5 kg. Its speed is 27.0 m/s, and the net braking force is 4.30x10^5 N. (a)what is its speed 7.50 s later? (b)how far has it traveled in this time?
March 15, 2011 by Dakota

Physics
For any given quadrupole, let the charges be +q, −q, +q, and −q at the corners of the square, and l be the side of the square. Calculate approximately the electric potential and the electric field far away from the quadrupole, IN THE THREE-DIMENSIONAL SPACE. You ...
September 4, 2014 by Asahi

biology:cells
which of the following is not true? a. ATP is formed during glycolyisis b. ATP contains less potential energy than ADP*** c. Plant cells generate ATP during cellular respiration d. ATP is used as a mobile energy carrier molecule by all cells which of the following is not true...
November 28, 2016 by Please check answers

Pre Calc
I do not see why I got two different equations for my answer A weight attached to the end of along spring is bounicng up and down. As it bounces, its distance from the floor varies sinusoidally with time. You start a stopwatch. When the stopwatch reads 0.3 s, the weight first ...
December 10, 2009 by Joe

english
Describe one of the strongest images you encountered from any of the following literature wolves of men by barry holstun lopez birches by robert frost haiku by kaga no chiyo haiku by basho spring is like a perhaps land by E.E Cummings from an inconvenient truth by al gore the ...
December 19, 2014 by shy girl

Philosophy
What are we required to do and why are we required to do it? Define how the following theories attempt to provide an answer to the question above Natural Law, Virtue Ethics, and Contract Theory
January 26, 2010 by Jay

Pre-Calc/Trig..
Write a function for the graph described as a transformation of y=x^2 y=x^2 experiences a vertical stretch of factor 2 and then a shift right of 3 units.
October 7, 2014 by Anonymous

physics
I want to confirm if its true if one object is to exert a force on another, then the two objects must be touching or connected by a third object.
April 6, 2010 by Anonymous

physics
if a car generates 18 hp when traveling at a steady 88 km/h, what must be the average force exerted on the car due to friction and air resistance
December 9, 2011 by eli

Physics
A 2.9 kg brick has a kinetic coefficient of friction of 0.33. what force must be applied to the brick for it to move at a constant velocity? Show work
October 17, 2015 by hamza

Physics
A 2.0kg object is moving at 3 m/s. A 4-N force is applied in the direction of motion and then removed after the object has traveled an additional 5m. The work done by this force is. Would the answer be simply: W=F*d= (4* 5m)= 20N and you only take the information concerning ...
November 4, 2006 by Nancy

space
2 birds fly from their nest to get to a certain spot(food) in a straight line,from opposite directions (east-west) Both fly 60 km/hr.but one has a 44 km/hr tailwind to his advantage(disadvantage for the other.The bird with the advantage gets to the feeding spot 1 minute before...
January 23, 2011 by Anonymous

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