Friday

April 18, 2014

April 18, 2014

Number of results: 15,604

**Physics**

The vector A -5.2 has a magnitude of 38m and points in the positive x direction. What is the x component of vector A? What is the magnitude of vector A?
*Friday, September 3, 2010 at 4:40pm by Jayson*

**Physics/Math**

For the vectors a = (3.9 m)i + (4.8 m)j, and b = (5.4 m)i - (2.0 m)j, give the x and y components, magnitudes, and directions of the following vector operations. (a.) a + b ______(x component) ______(y component) ______(magnitude) ______° (direction from the positive x axis) (...
*Saturday, January 27, 2007 at 4:02am by TechnoBoi11*

**Physics**

A bird watcher meanders through the woods, walking 0.35 km due east, 0.65 km due south, and 2.05 km in a direction 31.0° north of west. The time required for this trip is 3.50 h. Determine the magnitude and direction (relative to due west) of the bird watcher's. Find the ...
*Saturday, October 11, 2008 at 8:22am by Kevin*

**Physics**

An aircraft has a cruising speed of 100 m/s On a particular day, a wind is blowing from the west at 75.0 m/s If the plane is pointed due north, what would be the magnitude and direction of the velocity relative to the ground? If the pilot wishes to have a resultant direction ...
*Wednesday, October 16, 2013 at 12:24pm by Niki*

**physics**

A duck has a mass of 2.70 kg. As the duck paddles, a force of 0.130 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.210 N in a direction of 52.0 ° south of east. When these forces begin to act, the velocity of the duck is 0.110 m...
*Sunday, November 25, 2012 at 2:27pm by John*

**physics**

A duck has a mass of 2.10 kg. As the duck paddles, a force of 0.110 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.240 N in a direction of 47.0° south of east. When these forces begin to act, the velocity of the duck is 0.120 m/...
*Thursday, February 21, 2013 at 9:30pm by bebenel*

**Physics**

In wandering, a grizzly bear makes a displacement of 1588 m due west, followed by a displacement of 3390 m in a direction 38.0° north of west. What are the magnitude and the direction of the displacement needed for the bear to return to its starting point? Specify the ...
*Thursday, September 17, 2009 at 7:31pm by sandhu*

**cal3 please help not too hard of a problem**

Consider the function f(x,y)=xy+xz+yz+4 at the point P=(2,-1,1) Find the unit vector in direction of maximum increase of f in the direction of p. I know the magnitude of p=sqrt6 how do i find this???
*Tuesday, February 28, 2012 at 5:02pm by Lucy*

**physics 213**

A duck has a mass of 2.80 kg. As the duck paddles, a force of 0.120 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.190 N in a direction of 48.0 ° south of east. When these forces begin to act, the velocity of the duck is 0.120 m...
*Friday, February 3, 2012 at 6:20pm by Erin*

**Physics**

The electric field at the point x=5.00 cm and y=0 points in the positive x direction with a magnitude of 10.0 N/C. At the point x=10.0 cm and the electric field points in the positive x direction with a magnitude of 16.0 N/C . Assume this electric field is produced by a single...
*Monday, January 23, 2012 at 11:44pm by Cooper*

**Physics**

Near the equator, the Earth's magnetic field point almost horizontally to the north and has a magnitude of B = 50 micro T. What should be the magnitude and direction for the velocity of an electron if its weight is to be exactly balanced by the magnetic force?
*Tuesday, November 16, 2010 at 10:19pm by Ri*

**Physics!**

Two ropes pull on a ring. One exerts a 57 N force at 30.0°, the other a 57 N force at 60.0° (a) What is the net force on the ring? Magnitude __?__N Direction __?__° (b) What are the magnitude and direction of the force that would cause the ring to be in equilibrium? __?__N __?__°
*Thursday, October 25, 2012 at 2:19pm by Anna*

**chemistry**

A man pushing a mop across a floor causes it to undergo two displacements. The first has a magnitude of 152 cm and makes an angle of 125° with the positive x axis. The resultant displacement has a magnitude of 150 cm and is directed at an angle of 35.0° to the positive x axis...
*Monday, January 25, 2010 at 9:18pm by tea*

**physics**

the x- and y- component of an acceleration vector are 3.0 m/s^2 and 4.0 m/s^2, respectively. (a) The magnitude of the accerleration vector is (1) lets than 3.0 m.s^2, (2) between 3.0 m/s^2 and 4.0 m/s^2, (3) between 4.0 m/s^2 and 7.0 m/s^2, (4) equal to 7.0 m/s^2. (b) What are...
*Saturday, September 26, 2009 at 12:16pm by Standard C.*

**Physics **

Vectors A and B are in the xy plane and their scalar product is 20.6 units.? If A makes a 27.8 angle with the x axis and has magnitude A= 14.8 units, and B has magnitude B= 29.0 units, what can you say about the direction of B?
*Saturday, November 17, 2012 at 12:08am by Emma *

**Physics**

A radioactive nucleus at rest decays into a second nucleus, an electron, and a neutrino. The electron and neutrino are emitted at right angles and have momenta of 9.80 10-23 kg·m/s, and 5.80 10-23 kg·m/s, respectively. What is the magnitude and direction of the momentum of the...
*Sunday, November 21, 2010 at 6:40pm by Joe*

**science**

A particle had a speed of 18m/s at a certain time and 2.4 s laer its speed was 30 m/s in the opposite direction. What were the magnitude and direction of the average acceleration of the particle during the 2.4s interval? I got -5m/s^2 but the book said it was 20m/s^2 in the ...
*Sunday, September 10, 2006 at 4:25pm by Sarah*

**physics**

A duck has a mass of 2.3 kg. As the duck paddles, a force of 0.07 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.26 N in a direction of 48° south of east. When these forces begin to act, the velocity of the duck is 0.15 m/s in a...
*Thursday, September 23, 2010 at 12:08pm by ellen*

**Physics**

A duck has a mass of 2.8 kg. As the duck paddles, a force of 0.09 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.20 N in a direction of 47° south of east. When these forces begin to act, the velocity of the duck is 0.12 m/s in a...
*Friday, September 21, 2012 at 2:04am by Bob*

**Physics**

A duck has a mass of 2.8 kg. As the duck paddles, a force of 0.09 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.20 N in a direction of 47° south of east. When these forces begin to act, the velocity of the duck is 0.12 m/s in a...
*Friday, September 21, 2012 at 2:04am by Bob*

**physics**

A space vehicle is coasting at a constant velocity of 20.7 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.260 m/s2 in the +x direction. After 42.0 s, the pilot ...
*Thursday, October 13, 2011 at 11:25am by Taylor*

**Physics**

A displacement vector has a magnitude (size) and a direction (like any other vector). Now let's take one that is two meters in magnitude and East in direction. Then we combine it with another that is six meters East. Now if we move two meters East, then six meters East. I ...
*Tuesday, February 5, 2008 at 4:27pm by Damon*

**college physics**

A man pushing a mop across a floor causes it to undergo two displacements. The first has a magnitude of 140 cm and makes an angle of 130° with the positive x axis. The resultant displacement has a magnitude of 144 cm and is directed at an angle of 30.0° to the positive x axis...
*Tuesday, September 28, 2010 at 1:17pm by caitlin*

**physics**

A man pushing a mop across a floor causes the map to undergo two displacements. The first has a magnitude of 200 cm and makes an angle of 120° with the positive x axis. The resultant displacement has a magnitude of 240 cm and is directed at an angle of 60.0° to the positive x ...
*Saturday, September 10, 2011 at 9:43pm by grace*

**Physics please help**

A duck has a mass of 2.8 kg. As the duck paddles, a force of 0.05 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.15 N in a direction of 60° south of east. When these forces begin to act, the velocity of the duck is 0.12 m/s in a...
*Saturday, January 21, 2012 at 4:38pm by Sushmitha*

**science physics**

1.) What is the Magnitude of the electrostatic force on a +5 C charge 1.75 m to the left of a -2.5 C charge? (show your work) 2.) In What direction does the force on the +5 C charge act? 3.)Calculate the magnitude of the electric field of the -2.5 C charge at the location of ...
*Tuesday, May 14, 2013 at 10:42am by Todd*

**Physics**

Can you please provide me a starting point for these two questions Question One: Three charges are located on the +x axis as follows: q1 = +26 µC at x = 0 m, q2 = +13 µC at x = +2.0 m, and q3 = +42 µC at x = +3.5 m. (a) Find the electrostatic force (magnitude and direction) ...
*Thursday, August 30, 2007 at 9:46pm by Jim*

**physics**

Displacement vector points due east and has a magnitude of 2.69 km. Displacement vector points due north and has a magnitude of 7.91 km. Displacement vector points due west and has a magnitude of 8.64 km. Displacement vector points due south and has a magnitude of 4.57 km. ...
*Saturday, September 15, 2012 at 1:12am by loli09*

**maths**

Two athletes are pulling on a ring. One athlete pulls with a force of 150 N in a northerly direction. The second athlete pulls with a force of 200 N in a westerly direction. Calculate the magnitude [5 marks] and direction (relative to west) [5 marks] of the resultant of these ...
*Tuesday, February 7, 2012 at 12:57pm by alex*

**physics**

Which of the following statements is a true statement? A. A vector can have positive or negative magnitudes. B. A vector's magnitude cannot be more than the magnitude of one of its components. C. If the x-component of a vector is smaller than its y-component then that vector ...
*Friday, December 6, 2013 at 11:45am by laura*

**Vectors**

the dot product (or scalar product) is when you want a scalar answer, just a number that represents how much of one vector is along the other one. A dot B is |A| |B| cos T where T is the angle between vectors A and B The cross or vector product is how much the vectors are ...
*Sunday, June 15, 2008 at 6:14pm by Damon*

**Physics**

Vector A is directed along the positive y-axis and has magnitude sqrt 3.0 units. Vector B is directed along the negative x-axis and has a magnitude 1.0 units. (a) what are the magnitude and direction of A-B? (b) what are the x and y components of B-A?
*Monday, September 6, 2010 at 5:55pm by Tammy J*

**Physics**

Vector A is directed along the positive y-axis and has magnitude sqrt 3.0 units. Vector B is directed along the negative x-axis and has a magnitude 1.0 units. (a) what are the magnitude and direction of A-B? (b) what are the x and y components of B-A?
*Sunday, September 12, 2010 at 8:42pm by Tammy J*

**phy **

a watermelon seed has the following coordinates: x= -5.0, y = 8.0m, and z = 0m. find its position vector (a) in unit-vector notation and as (b) a magnitude and (c) an angle relative to the positive direction of the x axis (d) sketch the vector on the right-handed coordinate (3...
*Saturday, February 9, 2013 at 7:32am by stephen*

**Physics**

If course. B is a vector, it can be + or - Your equation is a magnitude type equation that does not really do the vector computations correctly to decide what direction r is in. You have to do that yourself. You need to go back to the vector equation for force on a charged ...
*Wednesday, February 25, 2009 at 3:43pm by Damon*

**physics**

<<magnitude 1 kg · m/s direction 2° above the x-axis>> Is that your answer or part of the question? I can't see your figure so can't tell what the angle is between the momentum vectors of the two masses. You know that the momentum of each is M*V. The direction of ...
*Wednesday, November 10, 2010 at 9:35am by drwls *

**Physics**

A diver of weight 730 N stands at the end of a diving board of length L = 5 m and negligible mass. The board is fixed to two pedestals separated by distance d = 1.5 m. What are the magnitude and direction of the force on the board from the left pedestal? (Include the sign. ...
*Wednesday, October 28, 2009 at 8:14pm by Ray*

**physics**

A 1.54 ×104 N boat experiences a force of 2 000 N from east by the ocean tide and a wind force against its sails with magnitude of 4000 N directed toward the northwest (60° N of W). Find the magnitude and the direction of the resultant acceleration
*Wednesday, September 18, 2013 at 10:20pm by leslie*

**science**

vector A has a magnitude of 12 units and makes an angle of 30 with the positive x-axis.vector b has a magnitude of 8 units and makes an angle of 80 with the positive x-axis.using a graphical method , find the magnitude and direction of vectors A-B
*Friday, September 6, 2013 at 3:50am by arvind*

**Physics**

On a safari, a team of naturalists sets out toward a research station located 4.0 km away in a direction 42° north of east. After traveling in a straight line for 2.3 km, they stop and discover that they have been traveling 30° north of east, because their guide misread his ...
*Saturday, September 15, 2012 at 9:28am by Harsh Patel*

**Physics**

The magnitude of the velocity is |V| = 2 pi R f, where f is the rotation frequency and R is the length of the radius vector. The direction is perpendicular to the radius vector, aimed in the clockwise direction.
*Thursday, February 4, 2010 at 1:19am by drwls*

**Physics **

An electron experiences a force of 12 mN in the positive x-direction in an electric field. What is the magnitude and direction of the electric field?
*Tuesday, February 8, 2011 at 10:56pm by Sam *

**Physics**

A 9.7-kg watermelon and a 7.1-kg pumpkin are attached to each other via a cord that wraps over a pulley, as shown. Friction is negligible everywhere in this system. The angle beneath the pumpkin is 53 degrees and the angle beneath the watermelon is 30 degrees. (a) Find the ...
*Sunday, October 10, 2010 at 1:26pm by Ammora*

**Physics **

A car travels 20.2 km due north and then 31.3 km in a direction φ = 61.2◦ west of north. Find the magnitude of the car’s resultant displacement. Then Calculate the direction of the car’s resultant displacement, measured counterclockwise from the northerly direction.
*Monday, January 28, 2013 at 2:10pm by Aurora *

**physics**

Remember that momentum is a VECTOR. The direction and magnitude are both important. You must resolve the MV product into x and y components to solve this problem. Apply conservation of momentum in a plane with x and y axes. All motion is in that plane. You will end up with two...
*Thursday, November 8, 2007 at 12:54am by drwls*

**physics**

There is a very large horizontal conducting plate in the x-y plane (consider it infinitely large). Its thickness is h . The charge densities on the upper and the lower surfaces are both equal to +σ. The goal of this problem is to find the electric field (magnitude and ...
*Wednesday, February 27, 2013 at 1:46am by Anonymous*

**College Physics**

Consider a rock thrown off a bridge of height 78.5 m at an angle č = 25° with respect to the horizontal as shown in Figure P4.20. The initial speed of the rock is 15.6 m/s. Find the following quantities: (a) the maximum height reached by the rock (b) the time it takes the rock...
*Monday, September 12, 2011 at 1:49am by HELP*

**Physics**

Because the charge on the proton is positive, the direction of the acceleration is the same as the direction of the electric field, the positive x direction. v^2 = v_0^2 + 2 a x (one of the equations of motion) Solving for a, and using v_0 = 0 a = v^2/2x This is the source of ...
*Sunday, July 17, 2011 at 3:48pm by CANTIUS*

**Physics**

Vector A is directed along the positive y-axis and has a magnitude of sqrt 3.0 units. Vector B is directed along the negative x-axis and has magnitude 1.0 units. What are the magnitude and direction of A + B?
*Monday, September 6, 2010 at 5:55pm by Dakota*

**University Physics**

If vector B is added to vector C = 6.7 + 6.9, the result is a vector in the positive direction of the y axis, with a magnitude equal to that of vector C. What is the magnitude of vector B?
*Tuesday, September 6, 2011 at 3:43pm by Phil*

**physics**

Two forces act on an object. The first force has a magnitude of 17.0 N and is oriented 68.0° counter-clockwise from the x axis, while the 2nd force has x- and y-components (-19.0 N, 16.5 N). Express the magnitude and direction of the net force.
*Thursday, November 14, 2013 at 10:38pm by James*

**Physics**

Cx = -13.2 m/s, Cy = -10.4 m/s Direction in ° counterclockwise from the positive x-axis & Bx = +100.0 m, By = -106.0 m Direction in ° counterclockwise from the positive x-axis Also Dx = +3.2 m/s2, Dy = +7.6 cm/s2 Find magnitude m/s^2 & Direction in ° counterclockwise from the ...
*Thursday, January 26, 2012 at 3:43pm by Anonymous*

**Physics**

A basketball player runs down the court, following the path indicated by the vectors A, B, and C in the figure. The magnitudes of these three vectors are: A = 12.0 m, B = 17.0 m, and C = 7.0 m. Let the +x-axis point to the right and the +y-axis point to the far side of the ...
*Sunday, September 11, 2011 at 9:35pm by !!!!*

**Physics**

An electron that has velocity v = (3 x 105 m/s) and moves along positive x direction through the uniform magnetic field B = (0.8T) which is along the positive z direction. a. Find the force on the electron (magnitude and direction). (e = - 1.6 x 10-19 C, m=9.1 x10-31 kg) b. ...
*Monday, April 25, 2011 at 6:41pm by asif*

**Physics--Current question**

Two long straight parallel wires separated by 1.00mm carrying currents in opposite directions with current equaling 10.0A each. Find the magnitude and direction of the magnetic field at Point A which = 0.50mm, Point B = 0.50mm, and Point C=0.50mm and write the directions of ...
*Monday, July 27, 2009 at 11:29am by MP*

**Physics - Momentum of cars at intersection**

Two vehicles are approaching an intersection. One is a 2500- kg pickup traveling at 14.0 m/s from east to west (the negative x-direction), and the other is a 1500-kg Mercedes going from south to north (the positive y-direction at 23.0 m/s). (a) Find the x and y components of ...
*Wednesday, September 1, 2010 at 6:07am by moza*

**Physics**

A 1,200-kg car is pulling a 305-kg trailer. Together, the car and trailer have an acceleration of 2.00 m/s2 in the positive x-direction. Neglecting frictional forces on the trailer, determine the following. (Indicate the direction with the sign of your answer. Take the forward...
*Sunday, October 7, 2012 at 11:32pm by Crown*

**physics**

A proton traveling at 10^4 m/s in the positive x-direction, enters a region where there is uniform electric field of magnitude 10 v/m and a uniform magnetic field of magnitude 10^-2 T. The electric and magnetic fields are parallel and are in the z-direction. In the following ...
*Saturday, May 14, 2011 at 11:34pm by Sandhya*

**physics**

A proton traveling at 10^4 m/s in the positive x-direction, enters a region where there is uniform electric field of magnitude 10 v/m and a uniform magnetic field of magnitude 10^-2 T. The electric and magnetic fields are parallel and are in the z-direction. In the following ...
*Sunday, May 15, 2011 at 3:28am by Sandhya*

**Physics**

At a certain time a particle had a speed of 16 m/s in the positive x direction, and 2.2 s later its speed was 30 m/s in the opposite direction. What is the magnitude of the average acceleration of the particle during this 2.2 s interval?
*Sunday, January 27, 2013 at 5:13pm by Patricia*

**Physics**

At a certain time a particle had a speed of 16 m/s in the positive x direction, and 2.2 s later its speed was 30 m/s in the opposite direction. What is the magnitude of the average acceleration of the particle during this 2.2 s interval?
*Sunday, January 27, 2013 at 5:27pm by Patricia*

**Physics**

At a certain time a particle had a speed of 17 m/s in the positive x direction, and 2.0 s later its speed was 32 m/s in the opposite direction. What is the magnitude of the average acceleration of the particle during this 2.0 s interval?
*Monday, January 28, 2013 at 6:16pm by Rachel*

**Physics**

At a certain time a particle had a speed of 17 m/s in the positive x direction, and 2.0 s later its speed was 32 m/s in the opposite direction. What is the magnitude of the average acceleration of the particle during this 2.0 s interval?
*Monday, January 28, 2013 at 6:28pm by Rachel*

**Physics 12**

There is a change in direction of the momentum by 90 degrees. The magnitude of the momentum remains 16.32 kg m/s. The magnitude of the impulse equals the magnitude of the momentum change VECTOR. That would be sqrt2 times 16.32 kg m/s Do you see why? If not, draw yourself the ...
*Tuesday, October 28, 2008 at 8:03pm by drwls*

**abac**

The speed of an object and the direction in which it moves constitute a vector quantity known as the velocity. An ostrich is running at a speed of 19.5 m/s in a direction of 65° north of west. (a) What is the magnitude of the ostrich's velocity component that is directed due ...
*Monday, August 30, 2010 at 7:46pm by heather*

**physics**

Consider a rock that is thrown off a bridge of height 27 m at an angle θ = 24° with respect to the horizontal as shown in the figure above. If the initial speed the rock is thrown is 12 m/s, find the following quantities: (a) The time it takes the rock to reach its ...
*Monday, September 6, 2010 at 10:13pm by frank*

**physics**

An amusement park ride consists of a car moving in a vertical circle on the end of a rigid boom of negligible mass. The combined weight of the car and riders is 5.1 kN, and the circle’s radius is 10 m. At the top of the circle, what are the (a) magnitude FB and (b) direction (...
*Tuesday, March 2, 2010 at 8:55pm by beav*

**Physics**

There is a very large horizontal conducting plate in the x-y plane (consider it infinitely large). Its thickness is h . The charge densities on the upper and the lower surfaces are both equal to +σ. The goal of this problem is to find the electric field (magnitude and ...
*Monday, February 25, 2013 at 8:41am by P*

**College Physics **

Vector subtraction (F1 - F2) is a special case of vector addition, since F1- F2 = F1 + (-F2). Use the data (magnitude and direction) of F1 and F2 obtained in measurement 1 to find out the magnitude and direction of the resultant vector of F1 - F2. The data is: F1: 200g and 30...
*Wednesday, September 26, 2012 at 9:36pm by Ashley*

**phy3**

A 0.01-kg baseball traveling in a horizontal direction with a speed of 11 m/s hits a bat and is popped straight up with a speed of 15 m/s. (a) What is the change in momentum (magnitude and direction) of the baseball?
*Saturday, March 17, 2012 at 5:03pm by opp*

**physics**

A uniform electric field is directed upward and has a magnitude of 5 N/C. What are the magnitude and direction of the force on a charge of -3 C placed in this field? F=Eq E=5 q=-3 5(-3)=-15N Downward Ok I have the downward correct the -15 is incorrect. Did I use the wrong ...
*Wednesday, July 25, 2012 at 9:18am by kkpdiluvu*

**Physics**

A particle with mass m = 1.20g and charge q = 345ěC is traveling in the x-direction with an initial velocity of v0 = 68.0m/s. The particle passes through a constant electric field in the y-direction with magnitude |E| = 263N/C over a distance of d = 12.0m. (a) What is the ...
*Thursday, January 17, 2013 at 5:45pm by Nick*

**Physics**

A block with a mass of m = 21 kg rests on a frictionless surface and is subject to two forces acting on it. The first force is directed in the negative x-direction with a magnitude of F1 = 9.5 N. The second has a magnitude of F2 = 19.5 N and acts on the body at an angle θ...
*Wednesday, February 19, 2014 at 11:04am by Maura *

**Physics**

There are two conducting concentric hollow spheres of outer radii R2 and R1 ( R2>R1 ). The thickness of the material of both spheres is d . The inner sphere is negatively charged with charge density -σ1, . The larger sphere is positively charged with charge density +&#...
*Wednesday, February 27, 2013 at 1:46am by Anonymous*

**physics**

A space vehicle is coasting at a constant velocity of 24.7 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.228 m/s2 in the +x direction. After 42.3 s, the pilot ...
*Thursday, February 10, 2011 at 1:04pm by frost*

**physics**

A space vehicle is coasting at a constant velocity of 22.5 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.223 m/s2 in the +x direction. After 57.5 s, the pilot ...
*Tuesday, January 31, 2012 at 1:59pm by Alex*

**physics**

A 29 kg child, with a 4.5 kg backpack on his back, first stands on a sidewalk and then jumps up into the air. Find the magnitude and direction of the force on the sidewalk from the child when the child is (a) standing still and (b) in the air. Now find the magnitude and ...
*Tuesday, October 4, 2011 at 12:07pm by ayla*

**physics**

A space vehicle is coasting at a constant velocity of 24.9 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.338 m/s2 in the +x direction. After 53.7 s, the pilot ...
*Sunday, June 23, 2013 at 3:12pm by louis aaaa*

**Physics**

There are two conducting concentric hollow spheres of outer radii R2 and R1 ( R2>R1 ). The thickness of the material of both spheres is d . The inner sphere is negatively charged with charge density -σ1, . The larger sphere is positively charged with charge density +&#...
*Monday, February 25, 2013 at 8:38am by P*

**physics**

a car travels 80 km due north and then 140 km in the direction west of north. find the magnitude and direction of the cars resultant displacementby drawing an accurate scale diagram.
*Saturday, December 4, 2010 at 2:07am by neeza*

**Physics**

Displacement vector A points due east and has a magnitude of 2.26 km. Displacement vector B points due north and has a magnitude of 2.62 km. Displacement vector C points due west and has a magnitude of 2.6 km. Displacement vector D points due south and has a magnitude of 2.6 ...
*Monday, August 26, 2013 at 5:52pm by Sarah*

**physics**

Landing with a speed of 87.7 m/s, and traveling due south, a jet comes to rest in 939 m. Assuming the jet slows with constant acceleration, find the magnitude and direction of its acceleration. Magnitude of acceleration
*Wednesday, September 5, 2012 at 7:49pm by martha*

**Physics -URGENT-**

A 2 kg mass accelerates at 5.7 m/s 2 in a direction 19◦ north of east. One of the two forces acting on the mass has a magnitude of 17.1 N and is directed north. Determine the magnitude of the second force. Answer in units of N
*Sunday, October 13, 2013 at 1:21am by Jenna*

**Physics - electric field intesity (check +help)**

Points A and B are 13.0 apart. A charge of +8.0mu is placed at A and another charge at +5.0mu is placed at B. Point P i located 5.0cm from A and 12.0cm from B. What is the magnitude and direction of the electric field intensity at P? Ans: i got the magnitude as 2.9*10^, ...
*Saturday, December 4, 2010 at 3:50pm by Farah*

**mechanical engineering**

A railroad car that weighs 20,000 lb is traveling eastward with a velocity whose magnitude is 5fps. A second car, on the same track, that weighs 40,000 lbs also traveling in an easterly direction with a velocity of 7.8fps. When the cars collided, they became coupled together ...
*Sunday, January 29, 2012 at 4:52pm by Anonymous*

**physics**

A hot-air balloon of mass 200 kg is descending vertically with downward acceleration of magnitude 1.2 m/s2. How much mass (ballast) must be thrown out to give the balloon an upward acceleration of magnitude 1.2 m/s2 (same magnitude but opposite direction)? Assume that the ...
*Wednesday, March 2, 2011 at 3:10pm by karim*

**physics**

A hot-air balloon of mass 200 kg is descending vertically with downward acceleration of magnitude 1.2 m/s2. How much mass (ballast) must be thrown out to give the balloon an upward acceleration of magnitude 1.2 m/s2 (same magnitude but opposite direction)? Assume that the ...
*Wednesday, March 2, 2011 at 3:41pm by karim*

**physicccs!**

A paraglider is flying horizontally at a constant speed. Assume that only two forces act on it in the vertical direction, its weight and a vertical lift force exerted on its wings by the air. The lift force has a magnitude of 1900 N. For both questions, take the upward ...
*Saturday, December 4, 2010 at 1:28am by hy*

**physics**

Velocity is a vector quantity, meaning it has both magnitude and direction. Acceleration is the rate of the change of velocity. Therefore, if the speed changes, the object is accelerating (whether it speeds up or slows down). ALSO- if the object is changing direction, the ...
*Tuesday, October 19, 2010 at 2:21am by Steven*

**Physics**

The momentum of the book is m1*v1 in +ve x-direction. Since there is no external force in the horizontal direction, the linear momentum of the 'book and you' system will be conserved. Therefore you would have the same magnitude of momentum in the opposite direction. If your ...
*Tuesday, June 5, 2012 at 10:21pm by ajayb*

**physics-Electric & magnetic fields**

A proton traveling at 10^4 m/s in the positive x-direction, enters a region where there is uniform electric field of magnitude 10 v/m and a uniform magnetic field of magnitude 10^-2 T. The electric and magnetic fields are parallel and are in the z-direction. In the following ...
*Sunday, May 15, 2011 at 5:47am by Sandhya*

**physics**

a) action is equal in magnitude and opposite in direction to reaction, Newton 3 b) total momentum is conserved Initial momentum = Mv - m v final momentum = 0 if both stopped so I claim that the mass of the bus equals the mass of the van if they both stop. If not they would ...
*Friday, June 7, 2013 at 8:53am by Damon*

**Physics**

At an air show, a jet plane has velocity components vx = 695 km/h and vy = 440 km/h at time 4.85s and vx= 933km/h and vy = 465 km/h at time 7.12 s. For this time interval, find (a) the x and y components of the plane’s average acceleration and (b) the magnitude and direction ...
*Saturday, January 21, 2012 at 6:28pm by MOMO*

**Physics**

Two objects with masses represented by m1 and m2 are moving such that their combined total momentum has a magnitude of 16.3 kg · m/s and points in a direction 71.5° above the positive x-axis. Object m1 is moving in the x direction with a speed of v1 = 2.84 m/s and m2 is moving...
*Sunday, March 2, 2014 at 5:33pm by Sean*

**Physics**

In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the picture. The tire remains stationary in spite of the three pulls. Alex pulls with force of magnitude 207 N, and Charles pulls with force of magnitude ...
*Saturday, March 1, 2014 at 1:19am by Molly*

**Physics-Mechaincs**

A 1.3 kg mass accelerates at 5.8 m/s2 in a direction 36◦ north of east. One of the two forces acting on the mass has a magnitude of 17.3 N and is directed north. Determine the magnitude of the second force. Answer in units of N.
*Sunday, September 19, 2010 at 9:50pm by Genevieve*

**AP Physics**

If there is no friction at all, the magnitude of the velocity, or the speed, will not be dependent on the angle, it only depends on the difference in elevations. However, since the velocity includes magnitude AND direction, the change of angle will change the direction of the ...
*Thursday, October 15, 2009 at 2:55am by MathMate*

**physics**

Three forces are applied to an object, as indicated in the drawing. Force Farrowbold1 has a magnitude of 29.0 newtons (29.0 N) and is directed 30.0° to the left of the +y axis. Force Farrowbold2 has a magnitude of 18.9 N and points along the +x axis. What must be the magnitude...
*Sunday, January 19, 2014 at 4:15pm by Emma*

**Please Help with 2 Physics Problems???**

1) In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the picture. The tire remains stationary in spite of the three pulls. Alex pulls with force FA of magnitude 207 N, and Charles pulls with force FC of ...
*Monday, February 17, 2014 at 1:18am by Tyler*

**Physics**

A particle moving initially at 4 m/s in the positive x direction is given an acceleration of 3 m/s^2 in the positive y direction for 2 seconds. What is the magnitude and direction of the particle's velocity after 2 seconds? If the particle was located at the origin when the ...
*Wednesday, September 15, 2010 at 12:00pm by Jess*

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