Sunday

September 25, 2016
Number of results: 76,790

**Physics**

A 1800-kg car experiences a combined force of air resistance and friction that has the same magnitude whether the car goes up or down a hill at 28 m/s. Going up a hill, the car's engine produces 52 hp more power to sustain the constant velocity than it does going down the same...

*October 15, 2012 by Darren*

**physics**

After placing a 0.500 m dent in the landlords van, the two management students are told they and their 200 daN beer freezer have to go. The new ramp is inclined at an angle of 32.1 o relative to the horizontal. The coefficient of static friction between the freezer and the ...

*March 13, 2016 by tom*

**physics**

After placing a 0.500 m dent in the landlords van, the two management students are told they and their 200 daN beer freezer have to go. The new ramp is inclined at an angle of 32.1 o relative to the horizontal. The coefficient of static friction between the freezer and the ...

*March 14, 2016 by tom*

**Math**

A resultant vector has a magnitude of 25m?s with an angle of 20 degrees counterclockwise of east. draw the resultant on a coordinate plane, Find the x-component. Find the y-component

*September 30, 2014 by Gene*

**Materials Science**

In this problem, you will construct the 2D Mohr's circle for two plane stress states defined in terms of the Cartesian components of the stress tensor in the x,y reference frame: [ σx,σy,τxy]. For each of these stress states, you must construct and use the Mohr'...

*October 10, 2014 by qwerty*

**physic**

A 660 N cat burglar is supported by cables in the figure below. Assume the angle č of the inclined cable is 36.0°. Find vertical cable? Thank you so much for your help.

*October 12, 2009 by Chan*

**physics**

A 280-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 25° with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest? rad/s

*November 30, 2012 by monic*

**physics**

A 310-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 25° with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest? rad/s

*March 8, 2015 by alba*

**physics**

an object of mass m is suspended by a string of length 2m .the object is rotated in a horizontal circle show the relationship between the tension and mass and linear velocity of the body when the string make an angle to the horizontal

*October 30, 2014 by boni*

**Math (URGENT)**

A word problem. David flew 300km on a commuter plane, then 2000km on a passenger jet. The passenger jet flew twice as fast as the commuter plane. The total flying time for the journey was 3.25 hours. What was the speed of each plane, in kilometers per hour? Please help. I've ...

*May 24, 2010 by John*

**physics**

A small 5.00 kg brick is released from rest 3.00 m above a horizontal seesaw on a fulcrum at its center, with a radius of 1.60 m. Find the angular momentum of this brick about a horizontal axis through the fulcrum and perpendicular to the plane of the figure the instant the ...

*November 2, 2009 by AE*

**Physics**

A long straight horizontal segment of wire with 0.060 m traverses a west magnetic field with 2.0 T. If a south current with 4.0 A flows through the wire, which one of the following statements concerning the effect of the magnetic force on the wire is true. a) The wire will be ...

*November 14, 2010 by Katie*

**physics**

A pilot wants to fly west (ie., the resultant is west). If the plane has an airspeed of 9.5 m/s, and there is a 25m/s wind blowing north, in what direction must she head the plane?

*December 3, 2010 by jane*

**math**

a plane flies northwards for 430km.if the plane flies eastward for 380km.how far is it from its starting point(ignore its height above the ground)

*June 4, 2016 by adebisi adewumi j*

**Trigonometry **

11. If a navigation error puts a plane 2.5° off course, how far off course is the plane after flying for 2 hours at 152 miles per hour?

*June 8, 2016 by Mark*

**physics**

A 2.0kg box rests on a plank that is inclined at an angle of 65° above the horizontal. The upper end of the box is attached to a spring with a force constant of 25 N/m. If the coefficient of static friction between the box and the plank is 0.17, what is the maximum amount the ...

*May 21, 2007 by micole*

**PHYSICS**

A basket is being dragged across a horizontal floor by two horizontal rope A and B which are inclined at 36 degree and 27 degree respectively with the direction in which the basket is moving.Rope A has a tension of 20Newton.Find the tension in rope B and the resultant force on...

*September 4, 2015 by TOSIN*

**Physics**

One kind of slingshot consists of a pocket that holds a pebble and is whirled on a circle of radius r. The pebble is released from the circle at the angle θ so that it will hit the target. The angle in the drawing is 33.4°. The distance to the target from the center of ...

*September 23, 2012 by Ryan C.*

**Physics**

One kind of slingshot consists of a pocket that holds a pebble and is whirled on a circle of radius r. The pebble is released from the circle at the angle θ so that it will hit the target. The angle in the drawing is 35.5°. The distance to the target from the center of ...

*September 28, 2012 by Eric*

**calculus 2**

An object thrown in the air on a planet in a distant galaxy is at height s(t) = -20t^2 +67t +42 feet at time t seconds after it is thrown. a) From what height was the object thrown? b) With what velocity was the object thrown? c) What is the acceleration due to gravity on this...

*January 31, 2013 by Rachel*

**physics**

the takeoff speed for a large airplane is 180 mi/hr(roughly 80m/s0 the plane is capable of accelerating at a rate of 4m/s^2 assume that the plane starts at rest determine the minimum runway length required for this plane to safely take off a smaller airplane requires a takeoff...

*July 26, 2016 by craig*

**Physics**

A lot of mass m2 = 28 kg hanging from a rope. The rope runs over a frictionless pulley and attached to a box of mass m1 = 52 kg. The box is on a plane with endpoints in A. Oblique Planet either by angle v = 180 in relation to the horizontal. The friction coefficient between ...

*December 12, 2010 by Oddbjørn*

**physics**

A block of mass 3.90 kg is pushed 3.80 m along a frictionless horizontal table by a constant 16.0 N force directed 24.0° below the horizontal. What is th total work done on the block?

*October 25, 2010 by gabe*

**physics**

While taking a plane flight to a meeting, a physicist decides to do a mental calculation of how much fuel the plane would consume in the absence of friction, assuming its engines have an efficiency of 22.0% and the mass of the plane is 200,000 kg. Each gallon of jet fuel ...

*July 25, 2013 by Justin*

**physics**

a heavy object is dropped from the top of a 25 m tall building and it reaches the ground in 2.26 seconds determine the acceleration due to gravity how far did the object fall during the first second how far did the object fall during the 2nd second

*July 14, 2016 by glenn*

**8th Grade Math (Algebra1)**

I actually have a few different problems that are giving me trouble. The first: We have to use the motion problem formula: d=rt and make a table containing the elements: rate: * time: = distance ------------------------------ label #1 label #2 The Directions for this problem's...

*February 3, 2009 by Nicole C.*

**Trigonometry**

an airplane over the pacific sights an atoll at a 11 degrees angel angle of depression. if the plane is 410 m above water how many kilometers is it from a point 410 m above the atoll

*March 5, 2012 by :)*

**physics **

i am going a center of gravity problem, with the x=w1(x1)+w2x2..../ W1+W2.. and i keep getting the wrong answer can someone please tell me what i am doing wrong this is the problem:Four objects are situated along the y axis as follows: a 1.94 kg object is at +3.27 m, a 2.76 kg...

*February 1, 2012 by Kaity *

**English**

Sorry, I included the wrong post. I still have a few doubts on the following sentences. 1) The traffic isn't very heavy. 2) A security officer will control (check?) you for metal. 3) Get on the plane (not in), find your seat and wait for your flight (plane) to take off. 4) ...

*December 1, 2011 by Henry2*

**Geometry**

Okay heres the pic. There is a plane with points B,D, and E.those [oints are collinear in the plane. And also outside of the plane is points A, and C. and those points are collinear outside of the plane.thought Line AC intersect at point B of the line BDE.FOr line AC the C is ...

*September 12, 2011 by Alexander H.*

**physics**

A plane flies 475 km east from city A to city B in 50.0 min and then 986 km south from city B to city C in 1.00 h. For the total trip, what are the (a) magnitude (in km) and (b) direction of the plane's displacement, the (c) magnitude (in km/h) and (d) direction of its ...

*October 7, 2012 by tatiana*

**Physics**

A plane flies 407 km east from city A to city B in 44.0 min and then 871 km south from city B to city C in 1.90 h. For the total trip, what are the (a) magnitude (in km) and (b) direction of the plane's displacement, the (c) magnitude (in km/h) and (d) direction of its average...

*February 9, 2014 by Robin*

**Physics**

A plane flies 407 km east from city A to city B in 44.0 min and then 871 km south from city B to city C in 1.90 h. For the total trip, what are the (a) magnitude (in km) and (b) direction of the plane's displacement, the (c) magnitude (in km/h) and (d) direction of its average...

*February 10, 2014 by Tyler*

**Physics**

a plane has an airspeed of 200 mph. the pilot wants to reach a destination 600 miles east but a wind is blowing 50 mph 30 degrees North of East. What direction must the pilot head the plane in order to reach the destination? I asked my Lab T.A. and she helped me understand ...

*September 6, 2010 by Alura*

**Geometry**

Point P lies in plane M. How many circles are there in plane M that have center P and a circumference of 6π inches? a) none b) one c) two d) four e) more than four

*July 7, 2010 by Liv*

**geometry**

Point P lies in plane M. How many circles are there in plane M that have center P and a circumference of 6ㅠ inches? a) none b) one c) two d) four e) more than four

*July 11, 2010 by Alice*

**math**

Point P lies in plane M. How many circles are there in plane M that have center P and a circumference of 6ㅠ inches? a) none b) one c) two d) four e) more than four

*July 11, 2010 by Kyle*

**Geometry**

A plane is heading west at 200 mph. The wind is blowing S30°W at 25 mph. 1. what is the ground speed of the plane? I could not figure this one out. Please help?

*May 21, 2012 by Amber *

**math hw**

42. Twenty minutes after a plane leaves the airport, it is reported to be 160 miles away. What average speed of the plane in the miles per hour?

*August 5, 2014 by David*

**trigo**

A plane in calm weather flies east at 20 K.P.H. A 45 K.P.H wind blows from the north. Find the direction and speed required to keep the plane in it's original course and speed.

*November 21, 2015 by carl*

**Physics**

Hello! I was wondering if I could get some help solving this problem? A car travels at a constant speed of 10.0 m/s along a straight highway that is inclined 6.0 degrees for 11.0 s. How high vertically does the car travel?

*September 23, 2010 by Gusty*

**Physics**

Hello! I was wondering if I could get some help solving this problem? A car travels at a constant speed of 10.0 m/s along a straight highway that is inclined 6.0 degrees for 11.0 s. How high vertically does the car travel?

*September 23, 2010 by Gusty*

**Physics**

Children sled down a 45 m long hill inclined at 26 degrees. At the bottom, the slope levels out. If the coefficient of friction is 0.1, how far do the children slide on the level ground?

*September 23, 2013 by Joan*

**Physics**

Children sled down a 45 m long hill inclined at 26 degrees. At the bottom, the slope levels out. If the coefficient of friction is 0.1, how far do the children slide on the level ground?

*September 23, 2013 by Joan*

**physics**

A pendulum consists of an object of mass 1.07 kg that hangs at the end of a massless bar, a distance 1.14 m from the pivot point. Calculate the magnitude of the torque due to gravity about the pivot point if the bar makes an angle of 22° with the vertical.

*October 9, 2008 by Ellen*

**Mcmaster**

A pendulum consists of an object of mass 2.26 kg that hangs at the end of a massless bar, a distance 2.02 m from the pivot point. Calculate the magnitude of the torque due to gravity about the pivot point if the bar makes an angle of 54° with the vertical.

*March 7, 2012 by Gabbie*

**Math**

Point A lies in plane B. How many lines can be drawn perpendicular to plane B through point A?

*October 16, 2013 by Christa*

**MATH**

Please help me with these problems. Work and answer is appreciated! :) thanks. 1. Find on the interval theta is greater than or equal to 0 and less than 2pi; then find the general solution: 5tantheta+1=-2.89 16cos^2theta-6=3 6sin^2theta+sintheta=2 costheta=.84 2tanx=7 2.Find ...

*November 7, 2007 by gf*

**Pre-Calculus-Trig**

A straight road slopes at an angle of 10 degrees with the horizontal. When the angle of elevation of the sun (from horizontal) is 62.5 degrees, a telephone pole at the side of the road casts a 15 foot shadow downhill, parallel to the road. How high is the telephone pole?

*January 30, 2011 by Chloe Mack*

**Calc Math**

A plane is heading on a bearing of 200° with an air speed of 400 km/h when it is blown off course by a wind of 100 km/h from the northeast. Determine the resultant ground velocity of the plane. What was your solution to answering this problem?

*February 22, 2015 by Amyy*

**physics**

an atom is placed in a uniform magnetic induction B. such that its plane normal to the electron orbit makes an angle of 30 degrees with the magnetic induction the torque acting on the orbiting electron?

*June 24, 2016 by manu*

**physics**

An artillery shell is fired at an angle of 66.1 degrees above the horizontal ground with an initial speed of 1650 m/s. The acceleration of gravity is 9.8 m/s2 . Find the total time of flight of the shell,neglecting air resistance.

*September 12, 2012 by Anonymous*

**Math**

What is the reference angle for 4400 degrees?

*August 14, 2009 by Paula*

**physics**

An athlete is supporting a weight of 200N in his hand with his forearm at a right angle to his biceps. Assuming his biceps are in the vertical plane, the axis of rotation of the forearm is 3 cm from the elbow and 25 cm from the centre of gravity of the weight, calculate the ...

*February 28, 2012 by alex*

**Algebra 2**

A UFO is first sighted at point A due east from an observer at an angle of 14 degrees from the ground. And at an altitude of 223 m. The UFO is next sighted at point B due east at an angle of 28 degrees and an altitude of 446 m. What is the distance from A to B? Round your ...

*February 13, 2012 by Katy*

**physics**

A ball of mass 0.4 kg, initially at rest, is kicked directly toward a fence from a point 20 m away, as shown below. The velocity of the ball as it leaves the kicker’s foot is 18 m/s at angle of 35 degrees above the horizontal. The top of the fence is 4 m high. The ball hits ...

*October 19, 2011 by jes*

**Precalculus**

I know I posted this before,but I did not learn it your way .....instead I drew a picture and use the law of cosines....is there a way you can show me the work using law of cosines?? A plane flies 30 mi on a bearing of 200 degrees and then turns and flies 40 mi on a bearing of...

*December 12, 2013 by Anonymous*

**Math (TRIG)**

Please help me set up these problems. 1.) Find an equivalent equation in rectangular coordinates. r(1 - 2 cos θ) = 1 2.) Find a rectangular equation for the plane curve defined by the parametric equations. x = sec t, y = tan 3.) A projectile is fired with an initial ...

*December 8, 2014 by Amber*

**Orbital Mechanics**

Some help with this exercise please. If you could give an explanation and not only the answers it would be great!!! Besides the 3-2-1 rotation sequence, another very common sequence in spacecraft applications is the 3-1-3 rotation sequence in which the z axis is used twice. ...

*January 23, 2015 by ntae001*

**physics**

1. There are three forces acting on an object, a 30N force pulling right, a 50N force pushing right, and 30N frictional force pushing left. a. What is the force of gravity on this 15kg object? b. If the object is on the ground what is the normal force acting on the object c. ...

*June 21, 2011 by molly*

**physics**

A man pushes on a piano with mass 200 {\rm kg} so that it slides at constant velocity down a ramp that is inclined at 10.5^\circ above the horizontal floor. Neglect any friction acting on the piano.

*February 23, 2012 by lkn*

**Physics**

How would you set this up? A 250-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 28° with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest?

*October 21, 2014 by Courtney*

**Physics help!!**

A plane is flying horizontally at constant speed, vo. when it releases a package. The package lands on the ground at t seconds later. Just before the package lands... a. What is its horizontal component of velocity? Leave in terms of vo and t. b. What is its vertical component...

*September 25, 2015 by jeff*

**physics**

A plane is flying horizontally at a height of 500 m and a constant speed of 429 km/h when an object is projected vertically downward at an initial speed of 35.0 m/s. If air resistance is neglected, the average vertical component of velocity between the object's release and its...

*September 3, 2012 by Anonymous*

**Resultant Force?**

a force F1 of 35 newtons pulls at an angle of 15 degrees notrth of due east. A force F2 of 75 newtons pulls at an angle of 55 degrees west of due south. Find the magntiude and direction of the resultant force. Please help me - I have no idea what to do or even where to start!

*April 23, 2012 by Tabby*

**Physics**

A plane with a velocity of 111. 9 meters per second at a maximum rate of 6.8 m/s^2 the plane touches the runaway what's the minimum time before it can come to rest? A=6.8m/s^2 V=111.9m/s t=?

*September 28, 2014 by Danielle*

**Math! Please check!**

Name the intersection of planes ADE and BEA. A- plane BED B- plane ABC C- line BD D- line AE My choice is D. (Sorry that I could not post an image)

*October 8, 2014 by Skye*

**Physics**

Can someone actually ANSWER the question pleas and post numerical answers. Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an...

*April 8, 2010 by Ron*

**Physics**

1.A plane traveling at 300.0 km/h attempts to land on a 500 m runway. The plane’s engines and brakes accelerate uniformly at –5.0 m/s2. Will the plane be able to land safely? Show all your work. Include any equations used, the given and unknown. Show all calculations. Express ...

*October 22, 2014 by May*

**plane and spherical trigonometry**

a ladder 38 feet long is leaning against the side of a wall. if the angle between the ladder and the wall is 54 (degrees) approximately how far is the bottom of the ladder from the wall?

*July 8, 2013 by mhonic*

**MathLog#4**

A degenerate cone results when the intersectoin of a plane with a double napped con is not a parabola, circle, elllipse, or hyperbola. When a plane parallel to the cone's nappe passes through the cone ,it can creat parabola. What can also be created when a plane passes ...

*April 2, 2012 by Beyonce*

**trig**

The angle of depression as measured from the top of a 41 foot tower to a reference point on the ground is 65 degrees. How far away, to the nearest foot, is the reference point from the base of the tower?

*May 8, 2013 by Anonymous*

**Trig**

Two planes take off at the same time from an airport. The first plane is flying at 240 miles per hour on a bearing of S 45.0° E. The second plane is flying in the direction S 45.0°W at 290 miles per hour. What is the bearing of the second plane from the first after 5 hours? (...

*October 1, 2014 by Lindy*

**science**

what is the magnification of an object 2cm tall when placed 10cm in front of a plane mirror?

*January 15, 2013 by christiana*

**Physics**

The magnification of an object 2km tall where placed in 150m in front of a plane mirror is ?

*April 4, 2013 by Omonayin Isreal *

**Physics**

Physics 20 acceleration due to gravity questions An object is thrown downwards, hitting the ground with a velocity of 10m/s . it fell for 0.880seconds. At what velocity was the object released.

*February 25, 2010 by jake*

**physics**

A 0.50 kg ball that is tied to the end of a 1.1 m light cord is revolved in a horizontal plane with the cord making a 30° angle, with the vertical (a) Determine the ball's speed. (b) If, instead, the ball is revolved so that its speed is 4.0 m/s, what angle does the cord make ...

*November 22, 2010 by tj*

**Trig Math**

I need help with this problem. I don't get how to do it or how they got that answer. A force of 50 pounds acts on an object at an angle of 45 degrees. A second force of 75 pounds acts on the object at an angle of -30 degrees. What was the direction and the magnitude of the ...

*March 29, 2010 by Jane*

**math**

a plat form and a building are on the same horizontal plane , the angle of depression of the bottom of the building from the top A of the platform is 39 degree. the angle of elevation of the top D of the building from the top of the platform is 56 degree. given that the ...

*May 12, 2016 by chris*

**Maths**

A plane setts off from airport A and flies due east for 100 km, then turns to fly due south for 80 km before landing at an airport b show that the approximate bearing of airport b from airport a is 129

*September 3, 2016 by Maria*

**Physics **

Two golf balls of equal size and mass are released simultaneously from the roof of a building. One of the balls has a smooth surface while the other one has grooves on it. They then hit on a hard and horizontal plane on the floor. Assume that the golf balls are not worn after ...

*April 19, 2010 by Eddy*

**PHYSICS need help now!!!**

A 66kg skater, at rest on frictionless ice, tosses a 6.0kg snowball with velocity by v=53.0i+14.0j m/s, where the x- and y- axes are in the horizontal plane.Find x-component (v_x) of the subsequent velocity of the skater.Find y-component (v_y) of the subsequent velocity of the...

*October 26, 2012 by Jcota2*

**Physics**

A plane drops a hamper of medical supplies from a height of 2960m during a practice run over the ocean. The planes horizontal velocity was 108m/s at the instant the hamper was dropped. What is the magnitude of the overall velocity at the hamper at the instant it strikes the ...

*November 19, 2012 by Laney*

**Physics**

A plane drops a hamper of medical supplies from a height of 2960m during a practice run over the ocean. The planes horizontal velocity was 108m/s at the instant the hamper was dropped. What is the magnitude of the overall velocity at the hamper at the instant it strikes the ...

*November 19, 2012 by Colby*

**physics**

motorcycle and 66.0 kg rider accelerate at 2.0 m/s2 up a ramp inclined 5.0° above the horizontal. What are the magnitude of the force on the rider from the motorcycle?

*October 9, 2010 by joe*

**PHYSICS PLEASE HELP !!!!!**

Two objects are placed on a frictionless incline which is inclined at 65.5 degrees. A mass of m1 = 7 kg is tied to a wall, which is at the top of the incline, by rope 1 which is parallel to the incline. A mass of m2 = 13 kg is tied to m1 by rope 2 which is also parallel to the...

*October 21, 2011 by Kaleigh*

**Geometry **

A plane is located at C on the diagram. There are two towers located at A and B. The distance between the towers is 7,600 feet, and the angles of elevation are given. a. Find BC, the distance from Tower 2 to the plane, to the nearest foot. b. Find CD, the height of the plane ...

*March 26, 2016 by SkatingDJ*

**Physics**

A long jumper leaves the ground at an angle of 15.1◦ to the horizontal and at a speed of 10.9 m/s. How far does he jump? The acceleration due to gravity is 9.8 m/s2 . Answer in units of m 010 (part 2 of 2) 10.0 points What maximum height does he reach? Answer in units of m

*January 23, 2013 by Patrick*

**trigonometry**

a tower 150 meter is situated at the top of the hill.At a point 650 m down the hill.The angle between the surface of the hill and the line of sight to the of the tower is 12degrees 30 '.Find the inclination of the hill to a horizontal plane.

*February 12, 2015 by lee12*

**Technical**

A vehicle of mass 1600kg take off from rest and coveres a distance of 280m in 60s. It continues at this speed for 98seconds and comes to rest after 106s. i. Determine the total distance covered. ii. Determine the amount of force exerted as it slow to a stop. iii. If the road ...

*January 19, 2016 by Daniel Dodoo*

**math**

the axes are rectangular and a point P moves on the fixed plane lx+my+nz=p.the plane through P perpendicular to OP meets the axes in A,B,C parallel to YOZ,ZOX,XOY intersect in Q.show that the locus of Q is p{1/x2+1/y2+1/z2}=l/x+m/y+n/z

*January 20, 2013 by manjula*

**phy**

Two constant forces act on an object of mass m = 4.50 kg object moving in the xy plane as shown in the figure below. Force 1 is 21.0 N at 35.0°, and force 2 is 47.0 N at 150°. At time t = 0, the object is at the origin and has velocity (3.70 + 2.25) m/s. (a) Express the two ...

*November 20, 2012 by patel*

**Physics**

A steel washer is suspended inside an empty shipping crate from a light string attached to the top of the crate. The crate slides down a long ramp that is inclined at an angle of 40 ∘ above the horizontal. The crate has mass 162 kg . You are sitting inside the crate (...

*February 9, 2016 by Denny*

**precalculus**

a plane is heading 60 degrees east of south at 180 km/hr. a 50 km/hr wind blows in the direction of 25 degrees west of south. find the resultant velocity and bearing.

*March 2, 2016 by anon*

**Physics**

A 30-kg uniform ladder 12 m long is leaning against a frictionless wall at an angle of 50 degrees above the horizontal. A 45-kg boy climbs 5.0 m up the ladder. What is the magnitude of the force exerted by the ladder on the wall?

*November 4, 2013 by shaun*

**Physical Science/light**

An object 5 millimeters high is located 15 millimeters in front of a plane mirro. How far from the mirror is the image located? The focal length f of a plane mirror is infinity and 1/f = 0. The optical equation becomes 1/Do + I/Di = 1/f = 0 Do is the distance to the object and...

*August 29, 2005 by Angie*

**physics**

the required takeoff speed for a large airplane is 180mi/hr(80m/s)the plane is capable of accelerating at a rate of 4m/s^2 assume the plane starts at rest, determine the minimum runway length required for this plane to safely take off, a smaller airplane requires a takeoff ...

*August 1, 2016 by scott*

**Geo**

A plane P cuts O in a circle that has diameter 20. If the diameter of the sphere is 30, how far is the plane from O?

*March 2, 2011 by Anonymous*

**maths**

the plane has seats for 420 passengers 15% of the seats are empty how many passangers are on the plane?

*September 5, 2011 by teemo*

**Physics**

If a plane is flying 40 mph with a tailwind of 6 mph, how fast is the plane going.

*June 21, 2013 by April*