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April 25, 2014

Search: drift velocity

Number of results: 10,860

physics
A current flows in a wire of circular cross-section with the free electrons travelling with a mean drift velocity v. If an equal current flows in a wire of the same material but of twice the radius,what is the new mean drift velocity (a)v/4(b)v/2(c)2v(d)4v
Sunday, September 22, 2013 at 10:09am by physics

Laboratory (math, chemistry)
Most analytic methods are subject to drift. Describe a system which could be used to determine the rate of drift of an analytic method.
Tuesday, February 12, 2013 at 5:08pm by Maranda

physics
A copper wire has a diameter of 1.532 mm. What magnitude current flows when the drift velocity is 0.500 mm/s?
Saturday, September 14, 2013 at 10:51pm by Justin

physics
Which of the following statements is FALSE regarding the Drift of charge carriers? It is the dominant carrier transport mechanism when an electric field is applied in the semiconductor. Holes move in the direction opposite to that of the applied field. During drift, the ...
Monday, October 7, 2013 at 11:32am by Anonymous

Physics
1. If the angle of the boat is 150 degrees, v' = 3 m/s, and v0 = 3.0 m/s, how far do you drift downstream before you arrive at the other side of the river? (HINT: read the x axis.) 2. If the river flow rate (v0) = 3.0 m/s, and the angle (, or theta) is 150 degrees, what v...
Saturday, February 1, 2014 at 10:17pm by John

pre-calculus
A man who can row in still water at 3 mph heads directly across a river flowing at 7 mph. At what angle to the line on which he is heading does he drift downstream and at what speed does he drift downstream?
Wednesday, March 17, 2010 at 11:05am by ruca

The continental drift theory
Explain how the following pieces of evidence supported the continental drift theory. a) matching continental margins b) similar animal fossils in South America and Africa c) similar rock types and structures in North America and northern Europe d) magnetic striping in rocks ...
Monday, July 26, 2010 at 9:16pm by Anonymous

Biology
True or false? (if false, replace word in *here*) 1) The random changes of allele frequencies associated with genetic drift frequently lead to a *gain* in genetic diverse. 2) *sexual selection* helps maintain the Hb^a/Hb^s heterozygous conditions in humans. 3) bottleneck and ...
Sunday, April 29, 2012 at 12:38pm by Max

physics
As part of a sinister plot, I connect a piece of high-purity GaAs 1 cm long to a 9 V battery, at room temperature. What is the resulting drift velocity of the electrons? Your answer should be in cm/s
Saturday, December 21, 2013 at 3:53am by Henry III

College Physics
A current exists in a wire that gradually narrows down to a smaller diameter. How do the drift velocity, the current density, and the electric field vary along the wire? Can you please help explain this?
Thursday, February 4, 2010 at 4:31pm by Sally

phys102
a copper wire has a diameter of 1.02mm,the wire carries a constant current of 1.67A,the density of the free electrons is 8.5X10^28 e/m^3.calculate the current density and drift velocity
Saturday, August 14, 2010 at 6:04am by kabelo

geology
is this ok? harry hess studied the arced chains of islands with active volcanoes. in 1953 he discovered the great global rift. he is also know for his theriores on the sea floor spreading. alfred Wegener. alfred is remembered by his theory of the continentail drift. he ...
Friday, March 13, 2009 at 8:32pm by scooby91320002

physics
Two metal spheres, each of mass 1 gm and radius 0.5 cm are placed on a smooth, horizontal, insulated plate such that their centers are 15 cm apart. One is charged to a potential 500 volt and the other to 1000 volt. What is the velocity of each sphere when they drift away to a ...
Thursday, June 18, 2009 at 4:44am by Sandhya

GEOGRAPHY / SCIENCE
The theory that addressed the apparent ability of landmasses to move through the crust is called Continental Drift? I think this is the answer but not sure. Please help Yes, You're right. The Continental Drift theory is based on plate tectonics. http://kids.earth.nasa.gov/...
Sunday, October 15, 2006 at 11:21am by Suzanne

science
a man wishes to cross a river in a boat .if he crosses the river in minimum time then he takes 10min with a drift of 120 m .if he crosses the river taking shortest route,he takes 12.5min find the velocity of the boat with respect to water.
Sunday, July 1, 2012 at 4:57am by jo1457

Science
Genetic drift results in a change in gene frequencies because a. gene flow within the population is less than gene flow between populations. b. reproduction is non-random within the population c. the population size is so small that chance occurrences can alter gene ...
Monday, March 12, 2007 at 6:28pm by Harry

Science guys :)
hey guys a got a few problems i need help with im really desperate for help theyre due soon online :( 1.Suppose that a constant current of 89 mA flows in a conductor. Find the absolute value of the total charge that passes through the conductor in 3 minute(s). Charge = ______ ...
Wednesday, August 31, 2005 at 12:54am by Zach

science
what could be the cause of continental drift?
Tuesday, November 10, 2009 at 6:22pm by Sara

english
drift make a sentece
Wednesday, September 23, 2009 at 9:39pm by rajvir

english
can you make a sentace the word is 'drift'?
Wednesday, September 23, 2009 at 9:42pm by rajvir

physics
1. What is a typical drift speed of electrons that make up a current in a typical DC circuit? (zero, less than 1 cm/s, about 10 m/s, or the speed of light) 2. What is the typical drift speed in a typical AC circuit? (zero, less than 1 cm/s, about 10 m/s, or the speed of light)
Friday, July 16, 2010 at 1:42pm by confused

physics
Drift velocity is best defined as a. the relationship between current and current density b. the number of mobile electrons per volume c. the number of mobile electrons per length d. the flux of the current density through a given area e. the average speed of the motion of the...
Sunday, March 23, 2008 at 6:00pm by Libby

Science help!!!
Describe the evidence that supported the hypothesis of Continental Drift.
Tuesday, November 12, 2013 at 7:32pm by Emma

science
WHERE CAN I FIND DR. WEGWNWR'S HYPOTESIS THAT LED TO THE DEVELOPMENT OF THE IDEA OF CONTINENTAL DRIFT?
Tuesday, October 2, 2007 at 6:29pm by lola

biology
which of the following cannot cause change in gene pool a) mutation b) migration c) meiosis d) genetic drift
Tuesday, May 29, 2012 at 3:43am by star

science
The earth has a magnetic north and south. How does this help up with evidence to support the theory of Continental Drift?
Tuesday, October 2, 2012 at 3:01pm by kayla

social studies
find out about the theory of 'Continental Drift' and 'Plate Tectonics'.
Tuesday, September 3, 2013 at 7:22am by Shivshankar Gupta

Science
Explain why most geologists did not accept Wegeners continental drift theory at the time he proposed it.
Friday, December 31, 2010 at 6:11pm by Anjan

physics
Assume a canister in a straight tube moves with a constant acceleration of -3 m/s2 and has a velocity of 13.5 m/s at t = 0.00 s. (a) What is its velocity at t = 1.00 s? v = m/s (b) What is its velocity at t = 2.00 s? v = m/s (c) What is its velocity at t = 2.5 s? v = m/s (d) ...
Sunday, January 22, 2012 at 11:24pm by marybeth

Geography (Ms. Sue)
1). How do the North Atlantic Drift and the prevailing westerlies affect Europe's climate? A: The North Atlantic Drift, which is carried by the prevailing westerlies, brings a moderate temperature to much of Europe--from northern Spain across most of France and Germany to ...
Saturday, September 28, 2013 at 1:26pm by Anonymous

Biology
What piece of evidence would actually allow us to measure the actual rate at which continental drift is occurring?
Wednesday, January 23, 2013 at 9:53pm by Mary

science
Most nekton ____ the ocean? A.swim in B. drift at the surface of C. attach to the bottom of D. all of the above
Thursday, March 21, 2013 at 7:09pm by charloette

physics
An iron wire has a cross-sectional area equal to 1.20 10-5 m2. Carry out the following steps to determine the drift speed of the conduction electrons in the wire if it carries a current of 34.0 A. (a) How many kilograms are there in 1.00 mole of iron? 1 kg/mol (b) Starting ...
Saturday, March 10, 2012 at 10:06pm by pam

HELP HELP SCI.
Why did Alfred Wegener have a hard time making people believe his theory of continental drift? HELPPPPP :D
Thursday, November 29, 2007 at 5:49pm by Lily

science
Explain why the fossil of an ocean fish found on 2 different continents would not be good evidence to continental drift.
Monday, March 23, 2009 at 6:33pm by sara

physics
a) An infinite number of changes each equal to q are placed along the x-axis at x = 1, x = 2, x = 4, x = 8, . . . and so on. Find the potential and the esoteric at x = 0 due to this set of changes. What will be the potential and electric field if, in the above set-up, the ...
Wednesday, June 17, 2009 at 6:13am by Sandhya

physics
a) An infinite number of changes each equal to q are placed along the x-axis at x = 1, x = 2, x = 4, x = 8, . . . and so on. Find the potential and the esoteric at x = 0 due to this set of changes. What will be the potential and electric field if, in the above set-up, the ...
Wednesday, June 17, 2009 at 6:15am by Sandhya

physics
a) An infinite number of changes each equal to q are placed along the x-axis at x = 1, x = 2, x = 4, x = 8, . . . and so on. Find the potential and the esoteric at x = 0 due to this set of changes. What will be the potential and electric field if, in the above set-up, the ...
Wednesday, June 17, 2009 at 7:13am by Sandhya

physics
what is the shortest possible time in which a bacterium could drift at a constant speed of 3.5mm/s across a petri dish with a diameter of 8.4cm
Wednesday, September 15, 2010 at 1:38am by karina

Physics
A small but measurable current of 3.20 E-10 A. exists in a copper wire whose diameter is 0.03 cm. Calculate the electron drift speed (in meters/second).
Saturday, November 10, 2012 at 9:17pm by andrew

earth sience
The point at which the continent stops and the rock of the ocean floor begins is the called the continental A. shelf. B. divide. C. drift. D. slope. is it d ?
Monday, September 9, 2013 at 12:37am by sergey

Bio
I have a question about genetic drift...wat is it actually...the book said that it random change in allele frequency but how does that happen??? and wats a founder effect?
Thursday, March 12, 2009 at 11:39pm by Jenny

science
1. What was wrong or why do you think people rejected Wegner's idea of continental drift? 2. Explain why some partly molten lava rises toward Earth's surface.
Tuesday, December 13, 2011 at 4:12pm by Brianna

Objects IN motion
Table 2 shows the velocity of an object at different times. Time(s)| Velocity(cm/s east) 0 | 0 5 | 7.8 15 | 24.3 20 | 31.8 35 | 57.3 ___________________________ K they have given me the velocity for 5 s, 15, etc. but I want to know the velocity for the other numbers like 2s ...
Tuesday, November 30, 2010 at 9:09pm by Teya

ET3034TUx Solar Energy
The width of the space charge region at a p-n junction is reduced by applying a voltage bias over the p-n junction. What is the correct statement on both the bias voltage and the p-n junction? a)The voltage is a forward bias and the diffusion of the majority charge carriers ...
Wednesday, October 16, 2013 at 2:18pm by Anon

EARTH SCIENCE
If the warm North Atlantic Drift were to cease, how might the climate of Western Europe change?Speculate about how such a climate could influence the biosphere? help me please.
Saturday, July 10, 2010 at 1:42pm by Anonymous

TO BOBPURSLEY
def of average velocity = t^-1 (x - x0) (average velocity = t^-1(x-x0))t=(avearge velocity)t + x0= x - x0 + x0 = x = (average velocity)t + x0 x = (average velocity)t + x0 def of average velocity were costant acceleration is assumed = 2^-1(v0 + v) plug into x = (average ...
Thursday, June 18, 2009 at 9:40pm by TO ]BOBPURSLEY

Physics
def of average velocity = t^-1 (x - x0) (average velocity = t^-1(x-x0))t=(avearge velocity)t + x0= x - x0 + x0 = x = (average velocity)t + x0 x = (average velocity)t + x0 def of average velocity were costant acceleration is assumed = 2^-1(v0 + v) plug into x = (average ...
Friday, June 19, 2009 at 8:23am by Physics

science
When is the average velocity of an object equal to the instantaneous velocity? a) always b)never c) only when velocity is constant d)only when velocity is increasing at a constant rate c) would be the answer since you could cross out a). I do know that instantaneous velocity ...
Thursday, September 6, 2007 at 5:16pm by Tammy

Physics
When is the average velocity of an object equal to the instantaneous velocity? a) always b)never c) only when velocity is constant d)only when velocity is increasing at a constant rate c) would be the answer since you could cross out a). I do know that instantaneous velocity ...
Sunday, September 9, 2007 at 1:31pm by Tammy

Geography (Ms. Sue)
1). How are the landforms of Europe both an advantage and a disadvantage to life in Europe? A: The landforms of Europe are an advantage as these landforms affect the climate in their favor. However, the mountains and uplands, for example, may be viewed as walls because they ...
Friday, September 27, 2013 at 10:20pm by Anonymous

physics
A length of wire has a radius of 3.00 ~ 10-3 m and a resistance of 0.200 . When the potential difference across the wire is 10.0 V, the electron drift speed is found to be 2.98 ~ 10-4 m/s. On the basis of these data, calculate the density of free electrons in the wire.
Thursday, November 15, 2012 at 7:27pm by Stacey

Physics
A current of 4 A flows in a copper wire 10 mm in diameter. The density of valence electrons in copper is roughly 9 1028 m−3. Find the drift speed of these electrons. Answer in units of m/s.
Thursday, November 1, 2012 at 2:21am by Aj

university, physics.
A length of wire has a radius of 3.00 ~ 10-3 m and a resistance of 0.200 . When the potential difference across the wire is 10.0 V, the electron drift speed is found to be 2.98 ~ 10-4 m/s. On the basis of these data, calculate the density of free electrons in the wire.
Monday, November 19, 2012 at 2:30pm by Brette

biology
Explain why a person should believe that all life that currently exists on planet earth evolved from a simple, common ancestor through the process of mutation, natural selection, sexual selection and genetic drift.
Tuesday, May 4, 2010 at 8:26pm by Terrance

Physics
The equation describing the velocity of the ice falling from the wing as a function of time is v=45(1-(0.804)^t). Determine algebraically the time required, to the nearest tenth of a second, for the ice to reach a velocity of 98% of its terminal velocity of 45 m/s. (v=velocity...
Monday, June 1, 2009 at 4:59pm by Sydney

physics
Which of the following statements is not true? a)the horizontal component of velocity cannot be larger than the total velocity b)the vertical component of velocity cannot be larger than the total velocity c)Neither horizontal nor vertical components of velocity cannot be ...
Monday, October 15, 2007 at 2:56pm by Tammy

physics
An electron has a constant acceleration of 2.0 m/s2. At a certain instant its velocity is 10.9 m/s. (a) What was its velocity 2.5 s earlier? m/s (b) What is its velocity 2.5 s later? m/s
Saturday, December 6, 2008 at 6:48pm by johnny

English 1
Can someone analyze this I have no idea what it means its from the poem substance, Shadow, and Spirit You had better go where fate leads. Drift on the stream of infinite flux Without joy, without fear: When you must go-then go And make a little fuss as you can.
Sunday, January 24, 2010 at 7:08pm by Andrea

Physical Science
a car has an acceleration of 4 m/s squared. What will the increase in it's velocity be after 2 seconds? If it started with a velocity of 30 m/s, what is its final velocity?
Thursday, February 24, 2011 at 5:29pm by Des

Math
Me, again... Please help me. Thank you. Assume a plane is flying directly north at 200 mph, but there is a wind blowing west at 23 mph. Part I: Express both the velocity of the plane and the velocity of the wind as vectors, using proper notation to represent each direction of ...
Wednesday, January 8, 2014 at 7:48pm by Lizzie098

physics, university
A length of wire has a radius of 3.00 x 10-3 m and a resistance of 0.200 ohms. When the potential difference across the wire is 10.0 volts, the electron drift speed is found to be 2.98 x10-4 m/s. On the basis of these data, calculate the density of free electrons in the wire.
Monday, November 19, 2012 at 2:31pm by Stacey

Physics
Plutos minimum orbital velocity is 3.7 km/s. What are the values for vP (perihelion velocity) and vA (aphelion velocity)?
Tuesday, November 30, 2010 at 10:23pm by Lola

physics
distinguish between Root mean square velocity, Most probable velocity, and Average velocity of gas molecules.
Monday, April 16, 2012 at 5:02pm by frank fred

Physical Science
What is the acceleration of an airplane with an initial velocity of 150 m/s and a final velocity of 175 m/s and the velocity change was made in 5 seconds? .
Wednesday, January 2, 2013 at 12:18am by Mariah

science
In 1912, Alfred Wegener discovered and explained the movement of continents, a theory he called"_____." a) plate movement b) continental drift c) moving continents d) shifting plates Just need to know if my answer or right or wrong. Thanks! :) b
Thursday, August 19, 2010 at 3:23pm by ant

Please help with Calculus problem??
A particle moves with a fixed acceleration 3 m/s^2. If its initial velocity is s(0)=0: a) Find its velocity function. b) How long does it take for the particle to reach the velocity 14 m/s^2? c) Find the distance the particle traveled when its velocity reaches 14 m/s^2.
Wednesday, July 10, 2013 at 9:39am by Robin

Algebra II
A plane flies with a heading of 48 degrees NW and an air speed of 584 km/h. It is driven from its course by a wind of 58.0 km/h from 12.0 degrees SE. Find the ground speed and the drift angle of the plane.
Wednesday, November 2, 2011 at 1:05pm by Arielle

science
The earth's magnetic shield has a) appeared only recently b)disappeared for short periods of time c)caused the earth's land masses to drift apart d)little effect on life this planet e)existed since the planet cooled e
Tuesday, August 17, 2010 at 3:12pm by ant

physics
A train passes a control tower with a velocity u and has a constant acceleration.At 800m beyond the tower,the velocity is 48km/h;and at 1.6km beyond the tower,the velocity is 64km/h,what is the velocity u ?
Sunday, June 19, 2011 at 4:03am by chrystabelle

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...
Tuesday, April 17, 2012 at 4:01pm by Iman

physics emegency!
A 16 kg object with a velocity 7.5 m/s explodes into two equal fragments. One flies off with a velocity 2.5i -2.5j m/s. What is the velocity of the other fragment in vector notation?
Monday, November 14, 2011 at 9:21pm by joe

Science
Maddy hits a golf ball up into the air with an initial velocity of (20m/s, 49m/s). Record the horizontal velocity, & vertical velocity at each second for 10 seconds.
Thursday, November 15, 2012 at 5:02pm by Anonymous

Physics!! help pleasee
A 10 kg object with a velocity 7.5i m/s explodes into two equal fragments. One flies off with a velocity 2.5i -2.5j m/s. What is the velocity of the other fragment in vector notation?
Wednesday, November 20, 2013 at 7:42pm by Shek

physics
A cherry bomb explodes into three pieces of equal mass. One piece has an initial velocity of 12m/sx^. Another piece has an initial velocity of 7.0m/sx^−5.0m/sy^. Part A What is the velocity of the third piece? Enter the x and y components of the velocity separated by a ...
Monday, March 3, 2014 at 10:44pm by bety

physics
A football is thrown horizontally with an initial velocity of (16.5 m/s). Ignoring air resistance, the average acceleration of the football over any period of time is (-9.81 m/s2). (a) Find the velocity vector of the ball 1.62 s after it is thrown. (b) Find the magnitude and ...
Monday, May 14, 2007 at 7:52pm by micole

Physics/Electricity
An aluminum wire carrying a current of 9.0 A has a cross-sectional area of 7.0X10^-6 m2. Find the drift speed of the electrons in the wire. The density of aluminum is 2.7 g/cm3. (Assume three electrons are supplied by each atom.)
Sunday, October 6, 2013 at 11:44pm by George

science-biology
I'm pretty sure the answer is A, am I correct? Natural selection tends to A) increase the frequency of characteristics that enhance survival and reproduction. B) decrease the number of individuals in any given population. C) lead to an increase in genetic drift. D) decrease ...
Wednesday, December 7, 2011 at 4:26pm by jon

physics
A cyclist is cycling at a uniform velocity of 8m/s for 8 seconds. He then stops paddling and the cycle comes to rest in next ten seconds. Draw the velocity-time graph and calculate: (i) the average retardation.(ii) the distance covered with uniform velocity.(iii) the distance ...
Sunday, August 7, 2011 at 7:23am by aisha

maths/ physics
An aircraft P flying at a constant height has a velocity of (300+j400)km/h. Another aircraft Q at the same height has a velocity of (200+j500) km/h. Determine a)the velocity of P in relation to Q. b) the velocity of Q in relation to P
Sunday, January 2, 2011 at 12:31pm by Ian Hart

physics
A football is thrown horizontally with an initial velocity of (16.5 m/s). Ignoring air resistance, the average acceleration of the football over any period of time is (-9.81 m/s2). Find the magnitude and direction of the velocity at this time and direction (as an angle) below ...
Tuesday, May 15, 2007 at 6:56am by micole

science
An aircraft travels through the air with a velocity of 200m/s due east. It is found to be travelling over the ground with a velocity of 220m/s in a direction of 20(degree) south of east.The difference between the two is due to thw wind velocity. What is the wind velocity?
Wednesday, October 10, 2012 at 7:32am by liam

Applied Dog Behavior
please check my answer thanks Instinctive drift may manifest itself in a A. Poodle chasing a rabbit. B. Border Collie who misses an agility obstacle. C. Beagle who knows how to heel but sniffs instead. D. Terrier that barks at another dog. I think that it is A however C looks ...
Friday, June 20, 2008 at 5:53am by -Anne

physics
Which bear has the greater average velocity over the entire period? Which bear has the greater velocity at t = 8.0 min? Is the velocity of bear A always positive? Is the velocity of bear B ever negative?
Wednesday, February 10, 2010 at 6:16pm by christian

Physics
Two metallic wires of the same material have the same length but cross-sectinal area is in the ratio of 1:2.they are connected in 1)-series 2)-parallel. Compare the drift velocities of the electrons in the two wires in both the cases. Plzz help
Sunday, January 20, 2013 at 9:18am by Abhishek

Physics (checking my thinking)
2 spheres, of unequal masses, hang on strings and are touching. Sphere a is pulled back to the left, string taught, and released, hitting sphere B at a known velocity. Sphere B's post impact velocity is known, and to the right. i have to find A's post collision velocity. ...
Sunday, December 14, 2008 at 5:39pm by charlie

Physics
A ball travels at 59.78 m/s for a distance of 16.45768956 meters, then decelerates at -89.67 m/s2 until is reaches a velocity of -89.67 m/s, then accelerates at 59.78 m/s2 until it reaches a velocity of 16.45758956 m/s, as shown in the graph to the right. What's the average ...
Monday, September 21, 2009 at 8:44pm by Jamie

physics
Figure 8 shows position-time graphs of the straight-line movement of two brown bears in a wildlife preserve. Which bear has the greater average velocity over the entire period? Which bear has the greater velocity at t = 8.0 min? Is the velocity of bear A always positive? Is ...
Tuesday, October 6, 2009 at 8:49pm by Mureia

science
The earth's magnetic shield has? a) appeared only recently b)disappeared for short periods of time c)caused the earth's land masses to drift apart d)little effect on life this planet e)existed since the planet cooled Just need to know if my answer or right or wrong. Thanks! :) e
Wednesday, August 18, 2010 at 7:09am by ant

College Physics
How do I solve this problem: A particular wire has a current of 10A. A) How many electrons pass a fixed point every 5 seconds? B)If a wire has a radius of 2 x 10^(-3) m and the electron drift speed is 2.63 x 10^(-5) m/s, determine the number density of electrons in the wire. ...
Thursday, February 4, 2010 at 4:22pm by Kate

physics
a body moves with a uniform velocity of 2m/sec for 5 sec then velocity was uniformly accelerated and a velocity of 10m/sec was achieved in next 5 sec.then brakes were applied uniformly and body comes to rest in next 10 sec.calculate a)acceleration and retardation produced b)...
Monday, May 28, 2012 at 2:35am by parul

Physics( Explain and choose right answer)
A 3 kg cat sitting on a 1.5 kg piece of cardboard on a frozen lake wants to jump to shore without touching the ice. If there is no friction between the cardboard and the ice, when the cat jumps. the cardboard will move in the opposite direction with a velocity: A. half as ...
Monday, March 24, 2014 at 6:31pm by Dan

Physics
A horizontal pipe narrows from a diameter of 10 to 5 cm. For an incompressible fluid flowing from the larger diameter to the smaller: Question 5 options: 1.the velocity and pressure both increase. 2.the velocity increases and the pressure decreases. 3.the velocity decreases ...
Wednesday, August 10, 2011 at 3:28pm by Sonya

science
a boat is traveling with a velocity of 5 km/hr upstream. The river is flowing at a velocity of 2km/hr downstream. What is the velocity of the boat compared to the riverbank? ►
Friday, January 28, 2011 at 3:38pm by john

mechanics
a particle is moving with a velocity of 6m/s when subjected to an accelaration of -3m/s for 4 seconds.it then moves with a constant velocity for 2 seconds.draw a velocity-time graph.
Monday, April 18, 2011 at 10:29am by ehm-zee

Physics
Two objects A and B are involved in a totally elastic collision The mass of A is 8.8 kg and the mass of B is 0.5 kg. The velocity of A is 4.5 m/s and the velocity of B is 0 m/s. If they collide elastically, what will be the final velocity of A in m/s?
Monday, July 9, 2012 at 7:22pm by M

Physics
A canoeist is trying to paddle upstream in a river that has a velocity of 6.1 m/s. a) If he can paddle his canoe at a velocity of 6.2 m/s will he make any headway? b)What will be his velocity relative to the shore?
Tuesday, September 18, 2012 at 9:02pm by Chidera

physics
Find the final velocity of the two balls if the ball with velocity v2i = -19.5 cm/s has a mass equal to half that of the ball with initial velocity v1i = +26.8 cm/s.
Thursday, June 2, 2011 at 2:34pm by erica

physics
Find the final velocity of the two balls if the ball with velocity v2i = -19.5 cm/s has a mass equal to half that of the ball with initial velocity v1i = +26.8 cm/s.
Thursday, June 2, 2011 at 9:14pm by jim

physics
an ice skater starts out traveling with a velocity of (-3,-7) m/s. he performs a 3 second maneuver and ends with a velocity of (0, 5) m/s. (a) what is his average acceleration over this period? (b) a different ice skater starts with the same initial velocity, accelerates at (1...
Friday, June 24, 2011 at 5:35pm by aimee

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