Saturday

February 6, 2016
Number of results: 116,651

**Math- intersection of planes**

Show that the line [x,y,z]=[10,5,16]+t[3,1,5] is contained in the plane x+2y-z-4=0 I tries writing the vector equation in parametric form and then substituting it into the respective x,y,z in the plane, after simplifying I get 0t=0 does this mean that the line is in the plane ...
*September 1, 2010 by Shaila*

**12th grade math**

a block of mass 77kg is placed at the top of a frictionless plane that is inclined 46degrees to the horizontal. The height of the plane is 23 meters. find the speed of the block at the bottom of the plane. Show the steps please, -thanks
*June 11, 2012 by frusterated*

**Calculus **

A point moves along the curve y=(x-2)^2 such that the x coordinate is increasing at 2 units per second. At the moment x=1, how fast is its y coordinate changing.
*March 9, 2010 by Cassy *

**calculus**

The graph of the function y=g(x) is given in the figure above. The x coordinate is (0,-2.) 3. Estimate the x-coordinate of the point where g''(x)=0. Round your answer to one decimal place.
*October 7, 2010 by nik*

**Trig**

A ferris wheel has a 14 meter diameter and turns counterclockwise at 6 rpm. a) Assuming that the center of the wheel is the origin of an x-y coordinate plane, write functions to find the position (x,y) of a rider that starts at the bottom of the wheel. b) Where is the rider 2 ...
*April 8, 2012 by Lisa*

**Physics **

A particle of mass m moves in a x-y plane. the coordinates of the particle at any instant are given by x=acos(wt) y = bsin(wt). where a,b,w, are constants. determine angular momentum ofthe particle with respect to the origin of the coordinate system.
*October 23, 2013 by Sarsi*

**Math**

y = |x − 4| + 8 Find the x-coordinate of the vertex of the graph. And the y-coordinate of the vertex of the graph. Please help me, I'm stuck!
*November 3, 2010 by HELP*

**Physics**

A particle leaves the origin with a velocity of 7.2 m/s in the positive y direction and moves in the xy plane with a constant acceleration of (3.0 – 2.0 ˆi ˆj ) m/s2. At the instant the particle moves back across the x axis (y = 0), what is the value of its x coordinate?
*September 29, 2008 by Lee*

**Geometry **

Plane R contains points ,M,and Y. Plane Z intersects with plane R at SM, AY intersects plane R at point Y. . Point A is not in plane Z or plane R. MY forms a right angle with MS. A. What is measure of < SMY? B. Name three points that are noncollinear. C. Can you name three ...
*October 20, 2015 by Sky*

**Math**

Two small planes start from the same point and fly in the opposite directions. The first plane is flying 35 mph slower than the second plane. In 2 hrs, the planes are 530 mi apart. Find the rate of the slow plane.
*February 3, 2010 by Matthew*

**trigonometry**

There is a plane arriving into Denver, CO. The plane is landing with an angle of depression of 42°. The plane is 18,000 feet off of the ground. Find how far the plane will travel horizontally before hitting the ground. (Round to the nearest hundredth)
*October 18, 2012 by chana*

**Math**

1. Plane hkp and plane rkp are two distinct planes. name the intersection of the plane hkp and plane rkp. A) Ray KP B) Ray HK C) Ray RP D) The planes need not intersect. Is the answer A? Please correct me if I am wrong. Thank you!
*September 14, 2015 by Tim*

**algebra**

find the x-coordinate if the vertex of a parabola that passes through the points (0,3) and (7.15,3). Round approximate results to the second decimal place. would I do 0+7.15/2 to get the x-coordinate?
*September 2, 2014 by TayB*

**geometry**

find PD if the coordinate of P is -7 and the coordinate of Dis -1
*September 15, 2010 by keke*

**PHYSICS**

A BLOCK OF WOOD REST ON AN INCLINE PLANE AND THE COEFFICIENT OF FRICTION BETWEEN THE BLOCK AND THE PLANE IS KNOWN TO BE 0.31 At What Angle Must The Plane Be Inclined To The Horizontal So That The Block Begins To Move Down The Plane
*January 27, 2016 by PRINCE*

**Math**

A person who weighs 130 pounds can burn about 300 calories per hour skateboarding. Write a function that relates the calories burned, c, to the number of hours, h, spent skateboarding. Identify the independent and dependent variable. Create a function table for values of h ...
*May 13, 2013 by Bell*

**math**

A person who weighs 130 pounds can burn about 300 calories per hour skateboarding. Write a function that relates the calories burned, c, to the number of hours spent skateboarding. Identify the independent and dependent variable. Create a function table for values of h equal ...
*May 17, 2013 by Diamon with connections*

**Physics**

A loaded penguin sled weighing 60 N rests on a plane inclined at 20° to the horizontal. Between the sled and the plane the coefficient of static friction is 0.27, and the coefficient of kinetic friction is 0.13. (a) What is the minimum magnitude of the force F, parallel to the...
*February 19, 2013 by Rachel*

**Physics**

An inclined plane is on a table 1.4m tall. A 6kg box is hanging vertically attached to a 2kg mass on a plane with an unknown incline plane with coefficient of sliding friction of .2 . a. determine the acceleration of the system. b. if the plane is 3.5m long and the blacks ...
*December 10, 2010 by Mitch*

**Algebra 1**

Find three points that satisfy the following conditions. The x-coordinate and the y-coordinate are additive inverses of each other. Any help or clues would be very much appreciated.
*January 29, 2013 by Anonymous*

**pre calculus**

Find the inverse of the following function. Find the domain, range, and asymptotes of each function. Graph both functions on the same coordinate plane. F(x)= ln(8-x) I am totally lost, somebody please help????
*April 24, 2013 by trish*

**math**

If a pyramid is sliced by a plane parallel to the base of the pyramid and that plane bisects the altitude of the pyramid, what percentage of the volume of the pyramid lies below the slicing plane?
*August 11, 2010 by Kyle*

**Math**

Liana has two toy planes. The first plane is on a string that is 12 feet long. The second plane can go in a circle that has a diameter of 22 feet. Which plane can make a larger circle in the air? Explain.
*January 25, 2011 by Alaina*

**Physics**

A Boeing 747 "Jumbo Jet" has a length of 55.9 m. The runway on which the plane lands intersects another runway. The width of the intersection is 24.0 m. The plane decelerates through the intersection at a rate of 5.61 m/s2 and clears it with a final speed of 43.3 m/s. How much...
*January 30, 2015 by Grayson*

**Physics**

A packing crate is placed on a 32° inclined plane. If the coefficient of static friction between the crate and the plane is 0.67, will the crate slide down the plane? What is the minimum angle to which the plane must be raised so that the crate will slide down the plane?
*November 30, 2010 by Jenni*

**algebra 2**

A. I need to write an equation to the linear equation..(-2,-2), (3,3). B. I need to graph the function of y=|x| on a coordinate plane. C. I need to give one similarity and one differnce for the equations and graphs in parts A and B. I really need your help on this i dont ...
*January 17, 2008 by logan*

**Physics**

A loaded penguin sled weighing 60 N rests on a plane inclined at 20° to the horizontal. Between the sled and the plane the coefficient of static friction is 0.25, and the coefficient of kinetic friction is 0.18. (a) What is the minimum magnitude of the force F, parallel to the...
*October 28, 2009 by Karen*

**7th grade algebra**

plane 1 travels 600 mph. plane 2 travels 800 mph and leaves 45 minutes later. when will plane 2 pass plane 1 Not sure what formula I use.
*September 25, 2015 by Kylee*

**math**

A plane traveling at 600 mph leaves 3/4 hr earlier than a plane traveling at 800 mph. when will the second plane surpass the first?
*December 8, 2010 by regina*

**Physics**

A loaded penguin sled weighing 81 N rests on a plane inclined at angle θ = 21° to the horizontal (Fig. 6-23). Between the sled and the plane, the coefficient of static friction is 0.24, and the coefficient of kinetic friction is 0.13. (a) What is the minimum magnitude of ...
*October 10, 2010 by Alaina*

**Physics**

A loaded penguin sled weighing 73 N rests on a plane inclined at angle θ = 21° to the horizontal (Fig. 6-23). Between the sled and the plane, the coefficient of static friction is 0.24, and the coefficient of kinetic friction is 0.19. (a) What is the minimum magnitude of ...
*October 1, 2011 by Granger*

**physics**

A loaded penguin sled weighing 75 N rests on a plane inclined at angle θ = 24° to the horizontal (Fig. 6-28). Between the sled and the plane, the coefficient of static friction is 0.25, and the coefficient of kinetic friction is 0.13. (a) What is the minimum magnitude of ...
*October 23, 2011 by Taylor*

**Physics**

A loaded penguin sled weighing 66 N rests on a plane inclined at angle θ = 24° to the horizontal (Fig. 6-23). Between the sled and the plane, the coefficient of static friction is 0.22, and the coefficient of kinetic friction is 0.13. (a) What is the minimum magnitude of ...
*October 23, 2011 by Ted*

**Math (Ms. Sue Please help!)**

A plane on a search mission flew east from an airport, turned, and flew west back to the airport. The plane cruised at 300km/h when flying east, and 400km/h when flying west. The plane was in the air for 7 hours. How far from the airport did the plane travel?
*January 2, 2013 by Kate*

**Math**

1.The square of x is equal to 4 times the square od y. If x is 1 more than twice y, what is the value of x? A) -4 B) -.5 C) -.25 D) .25 E) .5 2.In the xy-coordinate plane, lines L an Q are perpendicular. If line L contains the points (0,0) and (2,1), and line Q contains the ...
*September 26, 2010 by Leslie*

**physics**

A plane is found by radar to be flying 5.9 km above the ground. The angle of elevation from the radar to the plane is 78.6°. Ten seconds later, the plane is directly over the station. Find the speed of the plane, assuming that it is flying level.
*March 13, 2014 by eric*

**Math**

I need help with this problem: Two planes start from Los Angeles International Airport and fly in opposite directions. The second plane starts ½ hour after the first plane, but its speed is 80 kilometers per hour faster. Find the airspeed of each plane if 2 hours after the ...
*May 14, 2008 by Kelsey*

**Phsycis/Math (please help)**

Two blocks are connected by a string over a frictionless, massless pulley such that one is resting on an inclined plane and the other is hanging over the top edge of the plane. The inclined plane is inclined at an angle of 37 degrees. The hanging block has a mass of 16.0 kg, ...
*November 20, 2013 by Jared*

**Math**

Two small planes start from the same point and fly in the same direction. The first plane is flying 35 mph slower than the second plane. In 2 hrs, the planes are 530 mi apart. Find the rate of the slow plane.
*February 4, 2010 by Mathew*

**Math**

A plane on a search mission flew east from an airport, turned, and flew west back to the airport. The plane crised at 300km/h when flying east, and 400km/h when flying west. The plane was in the air for 7 hours. How far from the airport did the plane travel?
*January 2, 2013 by Kate*

**Plane Trigometry**

You observe a plane approaching overhead and assume that its speed is 550 miles per hour. The angle of elevation of the plane is 16 degrees at one time and 57 degrees one minute later. Approximate the altitude of the plane.
*February 14, 2013 by Horum*

**English**

Do you generally say: 1) We cooked food on the plane or in the plane or from the plane. (In this sentence I just want to say that we cooked our meals ourselves when we were travelling on the plane) Thank you.
*December 10, 2011 by Henry2*

**Math**

A line intersects the graph of y=x^2 twice. One point has an x-coordinate of -4, and the other point has an x- coordinate of 2. A. Find the equation of the line. B. Find the measure of the angle that the line makes with the x-axis.
*January 23, 2012 by Anonymous*

**Calculus**

The base of a solid in the first quadrant of the xy plane is a right triangle bounded by the coordinate axes and the line x + y = 2. Cross sections of the solid perpendicular to the base are squares. What is the volume, in cubic units, of the solid?
*July 28, 2015 by Ali*

**geomerty**

A line contains the points (0, -2) and (1,3). Another line graphed in the same coordinate plane contains the points (3, -1) and (-2,0). Based on the slope of these lines, are they parallel, perpendicular or neither?
*July 7, 2011 by cassie*

**slope and graphing**

The lines y=5/12x and y=4/3 are drawn in the coordinate plane. Find the slope of the line that bisects these lines. How? Do we find the average? Do we build isosceles triangles?
*March 10, 2013 by Knights*

**algebra 1**

In the standard (x,y)cooridniate plane the graph of (x-2)second power +(y+4 second power =9 is a circle. What is the area enclosed by this circle, expressed in sguare coordinate units? please help me?
*April 24, 2011 by elodie*

**Geometry Triangle Coordinate Plane Question**

What kind of triangle is made by connecting the points A(0, –6), B(3,–6), and C(3, –2)? equilateral right isosceles right and isosceles Thank You :)
*January 10, 2012 by sLEXANDria*

**Geometry midpoint formula**

A circle on the Coordinate plane has a diameter with endpoints at (6,8) and (15,8). What are the coordinates of the center of the circle? What is the radius of the circle? Identify the coordinates of another point on the circle. Explain how you found your answer.
*January 28, 2015 by Marianna*

**Geometry **

Use the Distance Formula and the x-axis of the coordinate plane. Show why the distance between two points on a number line (the x-axis) is | a – b |, where a and b are the x-coordinates of the points. How would I solve this?
*May 12, 2015 by Alexa*

**algebra**

which of the following are necessary to describe a rotation of a figure on a coordinate plane? choose all that apply the center of rotation the shape of the figure the number of degrees of the rotation the direction of the rotation
*November 1, 2015 by annonymous*

**Math**

a plane flies due north at 300 mi/h for 3 h then due west at 250 mi/h. If x represents the number of hours the plane is flying due west, determine for what values of x the plane will be more than 3700 mi from it's original point.
*March 8, 2011 by Rob*

**Physics**

1. A small plane can travel at 200 km/h in still air. If a 50.0 km/h wind is coming from the east, determine the ground velocity of the plane if the pilot keeps the plane pointed [N]. 2. A pilot is flying from City A to City B which is 300 km [NW]. If the plane will encounter ...
*April 24, 2014 by Corey Brown*

**mechanics**

An object (point mass) is projected up an inclined plane from the bottom with an initial speed of 5.0 m/s. The plane is 0.75 m high and the coefficient of kinetic friction between the object and the plane is 0.25. For what angle of inclination would the mass just come to rest ...
*February 6, 2012 by juan*

**physics**

An object (point mass) is projected up an inclined plane from the bottom with an initial speed of 5.0 m/s. The plane is 0.75 m high and the coefficient of kinetic friction between the object and the plane is 0.25. For what angle of inclination would the mass just come to rest ...
*February 6, 2012 by jason*

**Physics**

How do you find the coefficient of friction of an object sliding down an inclined plane. Given: m = 10 kg length of plane = 5.0 m Height of plane = 2.5 m
*January 4, 2009 by Megan*

**physics**

A body moving with uniform acceleration has a velocity of 9.8 cm/s when its x coordinate is 1.38 cm. If its x coordinate 1.4 s later is -8.1 cm, what is the magnitude of its acceleration? Answer in units of cm/s2
*August 24, 2011 by Jean*

**physics**

A body moving with uniform acceleration has a velocity of 9.9 cm/s when its x coordinate is 1.28 cm. If its x coordinate 1.3 s later is -9.1 cm, what is the magnitude of its acceleration? Answer in units of cm/s2.
*August 25, 2011 by Hannah*

**physics**

An object moving with uniform acceleration has a velocity of 11.0 cm/s in the positive x-direction when its x-coordinate is 2.97 cm. If its x-coordinate 2.95 s later is −5.00 cm, what is its acceleration?
*October 2, 2011 by Johna*

**physics**

An object moving with uniform acceleration has a velocity of 11.0 cm/s in the positive x-direction when its x-coordinate is 2.97 cm. If its x-coordinate 2.95 s later is −5.00 cm, what is its acceleration?
*October 2, 2011 by Johna*

**statistics**

a point is randomly selected within the rectangle with vertices at (2,0), (2,2), (-4,2), and (4,0). What is the probability that the point's x-coordinate and y-coordinate are both positive?
*January 4, 2012 by luckybee*

**COORDINATE GEOMETRY**

A RAY OF LIGHT ORIGINATES FROM A(1,2) AFTER REFLECTION ON X-AXIS AT POINT A REFLECTED AT POINT Q(5,3). FIND COORDINATE OF A
*September 6, 2014 by ASHMITA*

**Math**

Mattie drove 140 miles in the same amount of time that it took a tubropropeller plane to travel 520 miles. The speed of the plane was 190 mph faster than the speed of the car. Find the speed of the plane
*March 1, 2012 by Anonymous*

**physics**

A cart is propelled over an xy plane with acceleration components ax = 5.1 m/s2 and ay = -2.9 m/s2. Its initial velocity has components v0x = 8.2 m/s and v0y = 11.2 m/s. In unit-vector notation, what is the velocity of the cart when it reaches its greatest y coordinate?
*October 7, 2012 by tatiana*

**physics**

A body moving with uniform acceleration has a velocity of 10.2 cm/s when its x coordinate is 3.73 cm.If its x coordinate 2.33 s later is −2.74 cm,what is the x-component of its acceleration?Answer in units of cm/s^2
*September 3, 2012 by selena*

**physics**

An object moving with uniform acceleration has a velocity of 15.0 cm/s in the positive x direction when its x coordinate is 3.00 cm. If its x coordinate 1.60 s later is -5.00 cm, what is its acceleration?
*September 6, 2011 by Zohal*

**physics**

An object moving with uniform acceleration has a velocity of 15.0 cm/s in the positive x direction when its x coordinate is 3.00 cm. If its x coordinate 1.60 s later is -5.00 cm, what is its acceleration?
*September 6, 2011 by Zohal*

**Math**

Can someone show me how to solve these questions. A plane is is flying 240 mph heading N60°E. The wind is blowing S30°E at 30 mph. 6. What is ground speed of the plane? The ground speed of the plane is 266.40. 7. What is the smallest angle in the triangle? 8. What is ...
*March 16, 2014 by Crewniverse*

**physics**

A block of mass 39 kg lies on an inclined plane, as shown. The horizontal and vertical supports for the plane have lengths of 36 m and 15 m, respectively, and the coefficient of kinetic friction between the plane and the block is 0.3. The magnitude of the force ~F necessary to...
*October 6, 2010 by christine*

**college calculus**

a point is moving on the graph of xy=30. when the point is at (6,5), its x-coordinate is increasing by 6 units per second. how fast is the y-coordinate changing at the moment
*March 31, 2010 by daren*

**college calculus**

a point is moving on the graph of xy=30. when the point is at (6,5), its x-coordinate is increasing by 6 units per second. how fast is the y-coordinate changing at the moment
*March 31, 2010 by daren*

**Physics**

An object moving with uniform acceleration has a velocity of 12m/s in the +ve x-direction,when its x-coordinate 3cm.if its x-coordinate 2sec. later is -5cm ,what is the acceleration?
*November 25, 2012 by Minte*

**Physics **

A plane is flying west at 214 km/h. The wind is blowing south at 108km/h. a what is the ground speed of the plane b In what direction does the plane travel
*January 31, 2012 by Shekinah*

**conceptual physics **

you are in a plane traveling due North at 325 km/hr. The plane encounters a headwind (South) wind of 50 km/hr. What is the resultant velocity of the plane?
*September 24, 2014 by harper*

**Geometry HELP**

A line segment has one endpoint at the coordinate (0, 1) and a midpoint at the coordinate (2, 4). Find the other endpoint. a.)(1, 7) b.)(4, 7) c.)(1, 25)
*June 4, 2010 by Ariel*

**Physics**

A body moving with uniform acceleration has a velocity of 16.9 cm/s when its x coordinate is 3.1 cm. If its x coordinate 3.18 s later is -4.72 cm, what is the x-component of its acceleration?
*October 12, 2015 by Destiny*

**Calculus**

A particle moves along the curve y = sqr(1+x^3). As it reaches the point (2,3), the y-coordinate is increasing at a rate of 4 cm/s. How fast is the x-coordinate of the point changing at that instant.
*April 29, 2013 by Lizzy*

**Physics**

A body moving with uniform acceleration has a velocity of 11.1 cm/s when its x coordinate is 4.6 cm. If its x coordinate 1.75 s later is −4.29 cm, what is the x-component of its acceleration? Answer in units of cm/s2. How would I set this up?
*October 5, 2013 by Tre*

**college algebra**

Find the inverse of the following function. Find the domain, range, and asymptotes of each function. Graph both functions on the same coordinate plane f(x)=4+e^-x/3 please help me! show steps also, if i an just given an answer that wont help me! thanks in advance!!!
*August 28, 2012 by samantha*

**math**

in which quadraints are the signs of the first and second coordinate the same? the signs of the first and second coordinate are always the same in quadrants type I, II, III, or IV. use a comma to separate answers as needed
*September 28, 2010 by Anonymous*

**math**

A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later, a second plane leaves Los Angeles headed for Chicago at 620 mph. If the air route from Chicago to Los Angeles is 1800 miles, how long will it take (after the first plane takes off) for the first plane to...
*September 11, 2014 by Barbara*

**math**

A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later, a second plane leaves Los Angeles headed for Chicago at 620 mph. If the air route from Chicago to Los Angeles is 1800 miles, how long will it take (after the first plane takes off) for the first plane to...
*September 11, 2014 by Tish*

**math**

A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later, a second plane leaves Los Angeles headed for Chicago at 620 mph. If the air route from Chicago to Los Angeles is 1800 miles, how long will it take (after the first plane takes off) for the first plane to...
*September 12, 2014 by Alana*

**math**

At an airport, a flight controller was in a tower 40m above the ground. When she first observed a plane it was at an angle of elevation of 12 (degrees) from her line of sight and flying at a constant altitude (height) The plane had a constant speed of 360km/h Eight seconds ...
*May 19, 2013 by alice*

**Physics**

A 20 kg box approaches the foot of a 30 degree inclined plane with a speed of 10 m/s. the coefficient of friction between the box and the inclined plane is 0.2. (a) How far up the inclined plane will the box go? (b) If the box slides back down the inclined plane, what is its ...
*June 30, 2014 by Clair*

**physics**

A body moving with uniform acceleration has a velocity of 11.1cm/s when it's coordinate is 3.59cm. If it's x coordinate 2.48sec later is -3.58cm, what is the x-component of it's acceleration. Answer in units of cm/s^2
*September 16, 2012 by Emily*

**Calculus**

A particle moves along the curve y = sqr(1+x^3). As it reaches the point (2,3), the y-coordinate is increasing at a rate of 4cm/s. How fast is the x-coordinate of the point changing at that instant?
*May 1, 2013 by Kate*

**calc**

A particle moves along the curve below. y = sqrt(8 + x^3) As it reaches the point (2, 4), the y-coordinate is increasing at a rate of 5 cm/s. How fast is the x-coordinate of the point changing at that instant?
*March 5, 2015 by kirsten*

**math**

A plane flying at 200 knots left an airport A( 30° S, 31°E) and flew due North to an airport B( 30° N 31° E) (a) Calculate the distance covered by the plane, in nautical miles (b) After a 15 minutes stop over B, the plane flew west to an airport C(30°N 13°E) at the same speed.
*March 16, 2015 by kudu*

**Calculous**

Evaluate sin(theta) and cosine (theta) for the angle theta The graph gives you a point of (0.6,-0.8) on the x y coordinate plane with a radius of what appears to be 1 ( unit circle ) sin (theta) = cos (theta) =
*October 31, 2014 by Larry*

**physics**

"Charges of 2.00uc and -3.00uc are located in a coordinate plane at(2.00cm, 5.00 cm) and (3.00cm, 2.00cm) respectively. calculate the magnitude and direction of the electric field created by this pair at the origin. express your answer in both polar and rectangular form"
*February 1, 2011 by seahill*

**Pre-calculus- URGENT**

Convert the rectangular coordinate (-8,i (square root of 3) into polar coordinates. How do I do this?? I tried every way I knew of to convert the y coordinate (i (square root of three)) to polar form, but it didn't work. I think that the polar form of the x coordinate is ...
*September 13, 2015 by Ellie*

**Math**

A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later, a second plane leaves Los Angeles headed for Chicago at 620 mph. If the air route from Chicago to Los Angeles is 1800 miles, how long will it take (after the first plane takes off) for the first plane to...
*September 12, 2014 by Alana*

**Math**

Find the point of intersection between y=2-(1/2)x and y=1+ax. (a=alpha sign). You answer will be a point in the xy plane whose coordinates involve the unknown a . I got that which is x=2/(2a+1), y=(1+2a)/(2a+1) <-intersection point I need help is to: Find a (a=alpha sign) ...
*October 9, 2009 by SC*

**physics**

Three particles of masses 14 kg, 21 kg, and 69 kg are located at the vertices of an equilateral triangle of sides 7 m. A)Find the x-coordinate of the center of gravity of this system with respect to a coordinate system with origin at the 14 kg particle and with the 21 kg ...
*November 4, 2012 by maura *

**Physics**

A supersonic jet travels at 3.0 Mach (i.e. at three times the speed of sound). It cruises at 20,000 m above the ground. we choose t=0 when the plane passes directly overhead of an observer. At what time t will the observer hear the plane? -- there is a diagram of a person ...
*January 31, 2010 by Katelynn*

**physics**

A smooth body slides down a plane inclined at an angle of 60degree to the horizontal calculate, A. The components of the acceleration of the body. B. Along the inclined plane. C. Perpendicular to the plane. D. The velocity of the body at the base of the plane after 10s. E. The...
*April 29, 2015 by Marino*

**Math**

Could someone help me with these questions? Thanks! a) A cargo plane left Vancouver, British Columbia (time zone −8) at 3:00 p.m. on a Monday. The plane ﬂew for 11 h to Paris, France (time zone +1). At what local time and on what day did the plane land in Paris? b...
*February 5, 2014 by Chelsea*

**Trig**

Sketch the graph through at least one complete cycle. Label the axes on the coordinate plane. Use your graph to predict the height of point P above the surface of the water when the stopwatch shows 7 seconds. Round to the nearest tenth of a foot. (Enter only the number.)
*June 21, 2012 by Jessica*

**Math**

A plane takes off from a local airport. It travels due north at a speed of 400km/h. The wind blows the plane due east at a speed of 50 km/h. How far is the plane from the airport after 1h. Give your answer to one decimal place
*October 15, 2014 by John*