Friday

August 22, 2014

August 22, 2014

Number of results: 15,901

**College Physics**

A uniform rod of mass M = 437.0 g and length L = 37.1 cm stands vertically on a horizontal table. It is released from rest to fall. A)Which of the following forces are acting on the rod? B)Calculate the angular speed of the rod as it makes an angle θ = 45° with respect to...
*November 3, 2013 by Kimmy*

**physics**

In Physics, it is important to use mathemat- ical approximations. For instance, in a small angle approximation, tan α ∼ sin α . Find the largest angle α for which the dif- ference of sin α − tan α is less than 3.52% of the sin α value.
*June 28, 2011 by ryan*

**college physics**

A 565 N mountain climber moves across a rope strung across a canyon. When she is more than halfway across, she notices the rope makes a 10.0 degree angle (from horizontal) behind her and a 25.0 degree angle (from horizontal) ahead of her. What are the tensions in the rope in ...
*July 30, 2012 by Chris *

**Physics**

A 565 N mountain climber moves across a rope strung across a canyon. When she is more than halfway across, she notices the rope makes a 10 degree angle (from horizontal) behind her and a 25 degree angle (from horizontal) ahead of her. What are the tensions in the rope in front...
*July 24, 2012 by Chad*

**Physics (help steve)**

A thin aluminum ring hangs vertically from a torsion spring. A torsion spring when twisted exerts a restoring torque given by τ=−κθ where θ is the angle of twist. Suppose that the ring undergoes small torsional oscillations while it is being cooled ...
*July 5, 2013 by Bob*

**College physics**

A ray of red light, for which n=1.54, and a ray of violet light, for which n=1.59, travel through a piece of glass. They meet right at the boundary between the glass and the air, and emerge into the air as one ray with an angle of refraction of 22.5. What is the angle between ...
*July 30, 2010 by noell*

**maths **

Give reasons 1) Every parallelogram is not a rectangle. 2) Every rhombus is not square. 3)It is possible to have exterior angle of a regular polygon as 40 degree. 4) It is not possible to have interior angle of regular polygon as 145 degree.
*June 15, 2012 by joshi kratika*

**Science (physics)**

A particle P is launched from a point O with an initial velocity of 60m/s at an angle of 30 degrees to the horizontal. At the same time, a second particle Q is projected in the opposite direction with initial speed of 50m/s from a point level with point O and 100m from O. You ...
*March 18, 2013 by Joe*

**Geometry**

I need help with counterexamples and all the questions are false. 1.If an angle measures 34 degrees ,then the angle is acute. 2.If the length of twwo segments are each 17 feet,then the segments are congruent. 3.If two angles 32 and 148 degrees ,then are supplementary. 4.If you...
*June 26, 2011 by Lauren*

**Physics**

A fireworks rocket is moving at a speed of 48.4 m/s. The rocket suddenly breaks into two pieces of equal mass, which fly off with velocities v1 and v2, as shown in the drawing. What is the magnitude of (a) v1 and (b) v2? In the image the two pieces are going off in a right ...
*October 6, 2013 by Connor*

**math--fast please**

If I have a polygon with x+2y sides, how do I find the interior and eterior angle? I know that to find the interior angle you use 180(x-2) and for the exterior you use 360/x. But do i just plug in x+2y for every x? I'm lost 180(x-2) gives you the SUM of the interior angles. If...
*March 30, 2007 by Emily*

**physics**

A Hollywood Daredevil plans to jump a canyon on a motorcycle. There is a 15 m drop and the horizontal distance originally planned was 60 m but it turns out the canyon is really 69.6 m across. If he desires a a 3.2 second flight time a. what is the correct angle of his launch ...
*September 11, 2009 by Andy *

**physics **

A Hollywood Daredevil plans to jump a canyon on a motorcycle. There is a 15 m drop and the horizontal distance originally planned was 60 m but it turns out the canyon is really 69.6 m across. If he desires a a 3.2 second flight time a. what is the correct angle of his launch ...
*September 12, 2009 by Andy *

**geometry**

Can lines and planes intersect with each other? Yes. Consider a line perpendicular to your screen on your display you are looking at....the intersection is a point in the plane on the line.
*August 19, 2006 by Nobody*

**physics**

If a plane is diving straight towards the ground at 500 m/s how high up must he pull out of the dive to avoid hitting the ground.
*January 5, 2009 by john marsh*

**Physics**

Explain, with a diagram, how 2 plane mirrors could be fixed at a dangerous T-junction so that motorists approaching the junction could see all other traffic?
*January 16, 2009 by Nabiha*

**Physics**

how do you do this the motion of a ball on an inclined plane is described by th eequation delta x =1/2 a(delta t)^2. which of the following quantities must have a value of zero? a. Xi b. Xf c. Vi d. Tf :)
*January 31, 2009 by y912f*

**Geometry**

Consider again the sphere of radius 5 centered at (2, 3,−6). Describe the intersection of the sphere with the xz-plane. Write an equation (or equations) for this curve.
*April 17, 2010 by Yadlay*

**physics**

the distance of a girl from a plane mirror is 15m when she is standing infront of it.she can see her image behind the mirror 1- 15cm 2- 30cm 3- 45cm 4- 10
*November 24, 2010 by sweetie*

**Physics**

A solid sphere at rest at the top 12.0 m inclined plane rolls down the incline. How high vertically does it rise of the other incline?
*December 19, 2010 by George*

**physics**

A heavy bank-vault door is opened by the application of a force of 3.0 x 10^2 N directed perpendicular to the plane of the door at a distance of 0.80 m from the hinges. What is the torque?
*January 13, 2011 by Faith*

**math**

A plane travels at a rate of 425 miles per hour. Write an expression to show the distance it travels, if t reprents hours.
*January 19, 2011 by Nick *

**geometry**

an isosceles triangle on the coordinate plane has side lengths of 8,5,and 5 units. The long side is along the x-acis, find the coordinates of each vertex.
*February 3, 2012 by Anonymous*

**physics**

a ball striking a horizontal plane with a velocity v rebounds with a velocity 256v/625 after 4th collision. the coefficient of restitution is?
*April 11, 2012 by srikala*

**Science**

A simple machine with a wedge at one end, an inclined plane wrapped around an axle in the middle, and a wheel at the other end is a -----?
*May 2, 2012 by Griffin*

**Science**

A simple machine with a wedge at one end, an inclined plane wrapped around an axle in the middle, and a wheel at the other end is a -----?
*May 2, 2012 by Griffin*

**math**

A regular triangular pyramid has an altitude of 15.0 m and the base is 8.00 m on a side. Find the area of a section made by a plane parallel to the base and 8.00 m from the vertex.
*October 10, 2012 by david*

**Calculus**

Assume that an airplane is flying toward you at a constant height, h miles and at a speed dx/dt. When the plane is x miles away, what is the rate of change of theta?
*January 2, 2013 by Bibi*

**calculus**

An airplane is flying at a velocity of 300km/h S30degrees W in a wind blowing at a velocity of 50km/h S20degrees E. What is the true speed and direction of plane?
*April 2, 2013 by Nasi*

**Math**

An airplane is flying at a velocity of 300km/h S30degW in a wind blowing at a velocity of 50km/h S20degE. What is the true speed and direction of the plane?
*April 4, 2013 by Richard*

**math**

A plane travelling a velocity of 100km/h to south encounters aside wind blowing at 25km/h to the west what is its velocity to an observer on the ground?
*April 4, 2013 by mussa*

**Calculus 3**

Find the center of the ellipsoid x^2+4y+2z^2+2x-4y+z = 20 I'm having trouble factoring to get the center points. Can someone please help. This is where I'm stuck. (x^2+2x+1)+4(y^2-y+1/4)+2(x^2+1/2z+1/16)=20+1+1+1/8 (x+1)^2+ Now I don't know how to get the y and z plane factored.
*February 7, 2014 by Amber*

**phys**

A 1000-kg airplane moves in straight flight at constant speed. The force of air friction is 1800 N. The net force on the plane is
*March 13, 2014 by tony*

**phys**

A 1000-kg airplane moves in straight flight at constant speed. The force of air friction is 1800 N. The net force on the plane is
*March 14, 2014 by q.*

**Last physics question for the night **

A 18000kg airplane lands with a speed of 77 m/s on a stationary aircraft carrier deck that is 115 m long. Find the work done by nonconservative forces in stopping the plane. How do i do this?
*October 12, 2009 by Jessica*

**physics**

A fully loaded 737 aircraft takes off at 250km/h.If its acceleration is a steady 3.3 , how long a runway is required? How much time does it take the plane to reach takeoff?
*September 20, 2010 by kt*

**PHYSICS**

PLAN A 4 HR FLIGHT (TELL ME SPEED AND DIRECTION SETTINGS FOR THE PLANE) TO FLY FROM CHICOGO TO ATLANTA(1500 KM @ 30 DEGREES E OF S) ON A DAY WHEN THE WIND IS BLOWING 100 KM/HR DUE EAST
*February 7, 2011 by HELLO*

**Math**

Identify the sampling technique used to obtain this sample: Each person boarding a plane is asked to flip a coin; those showing “tails” have their luggage searched.
*October 11, 2011 by Jen*

**geometry**

An aeroplane when 6000 m high passes vertically above another plane at an instant when their angles of elevation at the same observing point are 60° and 45° respectively. How many meters higher is the one than the other?
*November 15, 2011 by amar*

**math**

A small block of mass 0.8kg is placed at the top of a 4m plane, when it is released, it take 3.5 seconds to slide to the bottom. Determine the coefficient of friction, stating assumptions made.
*December 4, 2012 by Anonymous*

**applied physics**

a sky diver jumps out of a plane at a height of 5000 ft. if her parachute does not open until she reaches 1000 ft, what is her velocity at that point if air resisitance is disreguared?
*April 22, 2013 by donna*

**sjc coolege**

A steel bar 10m long and 10cm ×2.5cm in section .It is subjected to an axial pull of 250KN. Determine the intensities of normal and tangential stresses on a plane.
*February 3, 2014 by zee*

**physics (clear answer)**

An airplane traveling north at 400 m/s is accelerated due east at a rate of 50 m/s2 for 6 s. If the effects of air resistance and gravity are ignored, what is the final speed of the plane?
*February 5, 2014 by jason*

**help**

The CN Tower is 553m high. A person in a boat on Lake Ontario, at a point B due south of the tower, observes the top (T) of the tower at an angle of elevation of 8 degrees. At the same time, another person, at a point C on a bearing {S 85 degrees E } from the towerobserves an ...
*September 26, 2006 by Kaitlin*

**Math**

5. The Leaning Tower of Pisa leans toward the south at an angle of 5.5 degrees. One day near noon its shadow was measured to be 84.02m long and the angle of elevation from the tip of the shadow to the following, assume that the Tower is like a pole stuck in the ground, that is...
*January 19, 2011 by Alicia*

**Chem(again)**

What is the relationship between the amount of solute and the amount of freezing point depression? delta T = kf m where delta T is the difference between the normal freezing point and the f.p. with a solute, kf is the freezing point constant, and m is the molality. Some ...
*February 6, 2007 by Chrissy*

**Physics**

Given the following vectors, find the x and y components a. Ᾱ = 37 m with an angle of 25° b. ? = 16m with an angle of 90° c. ? = 25m with an angle of 0° d. ? = 30m with an angle of 180° ADD AND SUBTRACT THE FOLLOWIN VECTORS PAIRS HINT: You have already solved the x and ...
*August 24, 2012 by Marlyn*

**physics**

an airplane with a speed of 40.4 m/s is climbing upward at an angle of 54 degrees with respect to the horizontal. When the planes altitude is 520 m, the pilot releases a package. a. calculate the distance along the ground measured from a point directly beneath the point of ...
*September 23, 2012 by mo*

**Business Law**

Finders Weepers, Losers Keepers The News Journal, July 20, 2000. In 1943, During World War II, a Navy TBD-1 Devastator crashed eight miles of the coast of Florida. The entire crew survived and there is no indication that any efforts were made to locate the plane by the Navy. ...
*August 16, 2007 by Maxine*

**PRE CALC! HELP**

1. a plane has heading of 54 degrees & airspeed of 225mph. The wind is blowing at 33mph from 144 degrees. what are its actua heading & airspeed? Round to one decimal place. A) 61.4deg, 257.1mph B) 7.4deg, 66114.0mph C) 136.6deg, 288mph D) no solution 2. Force with magnitude of...
*March 28, 2011 by elena*

**Physics**

You pull a simple pendulum of length L to the side through an angle of 3.50 degrees and release it. How much time does it take the pendulum bob to reach its highest speed? How much time does it take if the pendulum is released at an angle of 1.75 degrees instead of 3.50 ...
*April 17, 2007 by Tifani*

**maths**

A cannon is placed on a hillside pointing up the hill, where the hill is at an angle a Pi/4 to the horizontal. The cannon points at an angle Pi/6 to the slope. and a shot is red uphill with initial speed v0. (i) Find the maximum value of the distance between the cannon ball ...
*March 2, 2013 by hayley*

**Geometry**

Use the Law of Detachment to draw a conclusion. If the measures of two angles have a sum of 90 degrees, then the angles are complementary. measure of angle A + measure of angle B = 90. Could someone help explain the Law of Detachment so I can understand it better? And also, ...
*October 7, 2009 by Daphne*

**calculus**

a hot-air balloon rising srtaight up from level field is tracked by a range finder 5000 feet from the liftoff point. At the moment the range finder's elevation angle is 45 degrees (pie/4 radians), the angle is increasing at the rate of 0.14 radians per minute. how fast is the ...
*December 5, 2009 by marlyn*

**snell's law**

An equilateral prism of silica flint glassis used to refract white light. The indexof refraction of silica flint is 1.66 forviolet light and 1.62 for red light. What is the angle of separation between the violet and red ends of the rainbow produced when the ray of white light ...
*April 22, 2010 by PEACE :)*

**Pre -calculus**

An observer 2 km from the launching pad observes a vertically ascending missile at an angle of elevation of 21 degrees. 5 seconds later the nagle has increased to 35 degrees. What was its average speed during this interval? If it keeps going vertically at the same average ...
*December 5, 2010 by H*

**physics**

A neon atom (m = 20.0 u) makes a perfectly elastic collision with another atom at rest. After the impact, the neon atom travels away at a 55.2° angle from its original direction and the unknown atom travels away at a 51.8° angle. What is the mass of the unknown atom? [Hint: ...
*October 20, 2011 by kago*

**Physics SHM**

Am self studying SHM, so sorry for the elementary questions. Would someone check/confirm some facts i think I've learned please. 1 If a sine wave graph starts at the origin at time = 0s, the sysyem is in equilibrium? 2 The amplitude at t= 0s is zero. 3 Same system, the phase ...
*November 5, 2008 by charlie*

**physics**

The system shown in the Figure is in equilibrium. The mass of block 1 is 2.2 kg and the mass of block 2 is 3.5 kg. String 1 makes an angle = 28o with the vertical and string 2 is exactly horizontal. what is the angle between the string that connects the masses and the string ...
*April 10, 2008 by lizzy*

**Geometry**

If two non parallel lines are perpendicular to two other straight lines , each to each . Show that the acute angle between the first pair of lines is equal to the acute angle between the second pair of lines.
*July 29, 2012 by Mayank*

**physics**

A baseball is thrown with an initial velocity of magnitude v at an angle of 27.2 with respect to the horizontal (x) direction. At the same time, a second ball is thrown with the same initial speed at a different angle with respect to x. If the two balls land at the same spot, ...
*January 30, 2010 by Sal*

**Precalculus**

I've tried many times to get the equation to balance using trig identities like half-angle formulas, power-reducing formulas, and double angle formulas, but I couldn't get the equation to equal out. I only need to work one side to make it equal to the other, like a kind of ...
*December 2, 2010 by Christina*

**physics**

A person has a choice while trying to move a crate across a horizontal pad of concrete: push it at a downward angle of 30 degrees, or pull it at an upward angle of 30 degrees. If the crate has a mass of 50.0 kg and the coefficient of friction between it and the concrete is 0....
*March 21, 2014 by santoki*

**physics**

A person has a choice while trying to move a crate across a horizontal pad of concrete: push it at a downward angle of 30 degrees, or pull it at an upward angle of 30 degrees. If the crate has a mass of 50.0 kg and the coefficient of friction between it and the concrete is 0....
*March 23, 2014 by santoki*

**physics**

A person has a choice while trying to move a crate across a horizontal pad of concrete: push it at a downward angle of 30 degrees, or pull it at an upward angle of 30 degrees. If the crate has a mass of 50.0 kg and the coefficient of friction between it and the concrete is 0....
*March 23, 2014 by santoki*

**physics**

A person has a choice while trying to move a crate across a horizontal pad of concrete: push it at a downward angle of 30 degrees, or pull it at an upward angle of 30 degrees. If the crate has a mass of 50.0 kg and the coefficient of friction between it and the concrete is 0....
*March 24, 2014 by santoki*

**precalculus**

A force of 369 lbs makes an angle of 18 degrees 20 minutes with a force 427 lbs. Find the angle made by the equilibrant with the 369 lbs force. I know I can find this using the law of cosines, but I think my teacher wants me to use some vector thing, but I do not know how to ...
*May 11, 2008 by Iamxe*

**maths and physics**

A cannon is placed on a hillside pointing up the hill, where the hill is at an angle a Pi/4 to the horizontal. The cannon points at an angle Pi/6 to the slope. and a shot is red uphill with initial speed v0. (i) Find the maximum value of the distance between the cannon ball ...
*March 3, 2013 by tom*

**Precalculus**

Solve for the equation in the given domain. (tan theta)(sec theta)=tan theta theta E{real numbers of degrees} BY THE WAY, REMIND ME IF THIS IS THE CORRECT WAY TO FIND THE ANGLE OF... sec theta=2 To find the angle do you set it up like this?? 1/(cos^-1)(2)
*November 17, 2013 by Anonymous*

**Physics**

In the figure below the left hand calbe has a tension T1 and makes an angle of 42 with the horizontal. the right hand calbe as a tension T3 and makes an angle of 47 with the horizontal. The horizontal cable connecting the two masses has a tension of 37 N. Determine the mass M2.
*September 15, 2010 by Josh*

**English**

I forgot to add the following sentences. Thank you very much. 1) When we approached his mother, she went away and set on a bench on her own. 2) Her husband suffers from depression (??) and she doesn't want to talk to anyone, not even with her son. 3) Can you help me put the ...
*May 7, 2011 by Henry1*

**Geometry**

x ________________<20* |<90* y | |<70* (hypotenuse length is 12 units) I'm learning about trig ratios, and my dad was trying to compare it to a circle or something? All I know is sin = a/c cos = b/c tan = a/b you're trying to figure out the proportions of the lengths...
*August 23, 2008 by Angela*

**Math**

1. Write the expression as a function of an acute angle whose measure is less than 45. a. sin 80 b. sin (-100) To find the postive acute angle, usually you would subtract 360 from the given measure. Would you have to subtract 45 from the given measure. 2. Points A (1,0) and B...
*February 16, 2010 by Priscilla *

**physics...plz help me**

A cannon is pointed at a 60 degree angle relative to a flat, horizontal field. It fires a projectile with a muzzle speed of 1500 ft/s. Then the gunners change the angle to 30 degree, reload the cannon, and 5.0 seconds later, fire. What is the required muzzle speed for the ...
*December 10, 2008 by mary*

**Physics**

A golf ball strikes a hard, smooth floor at an angle of θ = 29.6° and, as the drawing shows, rebounds at the same angle. The mass of the ball is 0.041 kg, and its speed is 45 m/s just before and after striking the floor. What is the magnitude of the impulse applied to the...
*January 8, 2011 by Tom Atlus*

**Physics**

A Football player on team a is movin gat a velocity of 8ms at an angle of 49 below the x axis. He collides with a player on team B, The Player B is moving at 7.5ms at an angle of 41 below the X and has a mass of 110KG after the collision both players remain in contact and move...
*July 30, 2012 by Alex*

**Physics**

A fireworks rocket is moving at a speed of 48.4 m/s. The rocket suddenly breaks into two pieces of equal mass, which fly off with velocities v1 and v2, as shown in the drawing. What is the magnitude of (a) v1 and (b) v2? In the image the two pieces are going off in a right ...
*October 5, 2013 by Cheech*

**economies**

In the study of transitional economies, the gradualist approach is. a: Is a policy of slow adoption of economic reforms that Keynes has popularized in fighting the great depression. b: Is a policy of slow adoption of economic reforms by Putin's government in russia. c: Is a ...
*November 15, 2008 by me3598*

**Calculus**

Determine the measure of A if 0 degrees is less or equal to angle A and if angle A is less or equal to 360 degrees. Tan A = 0 Answer is somehow supposed to be 0 degrees, 180 degrees, and 360 degrees, but dont know how to get the answer, just really confused. Sin A = -1
*October 24, 2011 by -Untamed-*

**history**

in the 1920s, literature played a huge roll in people's lives. however, when the great depression struck in 1929, people were unable to purchase literature and books were focused on the downfall of society and how the glitz and glamour of the 1920s dissapeared. my question is ...
*December 31, 2012 by Gregg*

**physics**

A heavy bank-vault door is opened by the application of a force of 3.0 10^2N directed perpendicular to the plane of the door at a distance of 0.80 m from the hinges. What is the torque? 300 N * m ?!?!?
*February 16, 2009 by y912f*

**Physics**

A 5 kg block is pushed up a 37 degree incline given an initial velocity of 2 m/s at the base of a frictionless plane. The maximum vertical displacement of the block is nearly what?
*October 25, 2009 by Lindsey*

**Math**

What does it mean if a line in R^3 is parallel to the xy-plane but not to any of the axes. I really don't know what this means in terms of how the parametric and symmetric equations of the line should look. Please help.
*October 27, 2010 by Kate*

**Math**

What does it mean if a line in R^3 is parallel to the xy-plane but not to any of the axes. I really don't know what this means in terms of how the parametric and symmetric equations of the line should look. Please help.
*November 2, 2010 by Kate*

**Pre-CALC**

Can anyone help me with this problem step by step please... Find the area inside the ellipse in the xy-plane determined by the given equation x^2 y^2 ____ + ___ =1 10 25
*December 7, 2010 by Amy*

**physics**

A heavy bank-vault door is opened by the application of a force of 3.0 x 102 N directed perpendicular to the plane of the door at a distance of 0.80 m from the hinges. What is the torque?
*January 13, 2011 by Faith*

**Physics**

A ball starts from rest down a smooth (frictionless) 45 degree inclined plane 10 m above the floor. How fast will it be going when it reaches the floor?
*March 19, 2011 by Rodney*

**PreCal**

A triangular prism has vertices at A(2, 0, 0), B(2, 1, 3), C(2, 2, 0), D(0, 0, 0), E(0, 1, 3), and F(0, 2, 0). Which image point has the coordinates (1, 4, 3) after a translation using the vector 1, 2, 3? What point represents a reflection of B over the xy-plane? B'( )
*September 14, 2011 by Sam*

**physics**

A 5kg box on a horizontal plane has a coefficient of kinetic energy of 0.2. The object is pulled on horizontally with a rope at 2 m/s^2. With 9.8m/s^2 gravitational force, what is the tension on the rope?
*October 6, 2011 by Matt*

**math**

what is the locus of the midpoints of the line segments joining a given external point to all points of a plane? (Locus is set in space aka 3d)
*May 13, 2012 by My Name Is Bob*

**phsyics **

An airplane has a velocity of 185 miles per hour when it lands, how long must the runway be if the plane decellerates at 2.5 meters per second
*July 5, 2012 by Andrew Moore*

**physics **

An airplane has a velocity of 185 miles per hour when it lands, how long must the runway be if the plane decellerates at 2.5 meters per second
*July 5, 2012 by Andrew Moore*

**Math( Geometry)**

All three planes in the figure provided are parallel. They are cut by lines containing points A, B and C and X, Y and Z. Each of these points lies in a plane. If BC=8 cm, YZ=10 cm and XY=14 cm, find AB. A.)10 1/2 cm B.)10.2 cm C.)11 1/5 cm
*July 14, 2012 by john*

**math**

At points on the curve y=2sqr(x), line segments of length h=y are drawn perpendicular to the xy-plane. Find the area of the surface formed by these perpendicular from (0.0) to (3.2sqr3).
*August 14, 2012 by ibranian*

**algebra**

Write an algebraic expression for the verbal description. The travel time for a plane traveling at a rate of r kilometers per hour for 820 kilometers
*December 18, 2012 by Anonymous*

**Physics**

An airplane originally at rest on a runway accelerates uniformly at 6.2 m/s2 for 12 sec. During this 12 sec-interval the air plane travels an approximate distance of?
*February 18, 2013 by Arria*

**Math**

An airplane is going 300 mph at a bearing of N 55 degrees E. The wind is blowing 30 mph due East. What is the actual speed and direction of the plane?
*March 14, 2013 by Shayne*

**Three Dimensions/Calculus**

Find the general form of the equation of the plane passing through the point and perpendicular to the specified vector or line. P= (2,1,2) which is perpendicular to n=i
*April 8, 2013 by Aunna*

**Calculus-PLZ help!**

Given u=3i-2j+k,v=2i-4j-3k, w=-i+2j+2k, 1 Find a unit vector normal to the plane containing v and w. 2 Find the volume of the parallelepiped formed by u, v, and w. 3 Are any of these vectors parallel? Orthogonal? Why or why not?
*May 13, 2013 by Liz*

**physics**

What is the smallest size plane mirror a 184-cm {\rm cm}-tall person should buy to see himself if he mounts the mirror on a vertical wall?
*April 1, 2014 by Mel*

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