Saturday

October 10, 2015
Number of results: 18,600

**Physics**

A box of mass 10.9 kg with an initial velocity of 2.01 m/s slides down a plane, inclined at 38◦ with respect to the horizontal. The coefficient of kinetic friction is 1. The box stops after sliding a distance x. The acceleration due to gravity is 9.8 m/s. a. How far does...
*December 2, 2014 by Unknown*

**math**

the measurement of an angle is 5times the measurement of its supplement.what is the measurement of the angle?
*August 20, 2013 by babyc36*

**Math:Calculus**

Determine vector and parametric equations for the plane containing the point P0(1, -2, 3) and having direction vectors a= (4, -2, 5) and b = (-3, 3, 7). Thanks for the help.
*July 4, 2008 by Susie*

**math**

how do you find the volume of the solid that lies within the sphere x^2+y^2+z^2=9 above the xy plane, and outside the cone z=2*sqrt(x^2+y^2)??
*April 9, 2009 by alana*

**math**

an early flight lasted for 12 seconds. The plane flew 144 feet. what is the airplane's speed in ft/min?
*April 21, 2009 by tanya*

**calculus**

Find an equation of the plane orthogonal to the line (x,y,z)=(-4,-9,9)+t(-8,-1,5) which passes through the point (-9,9,-4). Give your answer in the form ax+by+cz=d.
*March 4, 2010 by zama*

**Trig**

Need answer check pls. Find the rectAngular equation for the plane curve by parametric equAtions. X=t +4 , y= t^2
*April 25, 2010 by Stacey grahaM*

**physics**

a plane travels 5.0 x 10^2 while being accelerated uniformly from rest at the rate of 5.0 m/s. what final velocity does it attain?
*September 9, 2010 by Madi*

**CALCULUS 3**

Use the triple scalar product to determine whether the given points lie in the same plane. A(1, 2, 3), B(3, -4, 8), C(7, -1, 1), D(5, 5, -4)
*February 24, 2011 by Jessica*

**algebra**

(a) A graph of is shown in the figure, where y _ L(x). As the weight of the plane increases, what can be said about the length of the runway required?
*June 1, 2011 by logan*

**PHYSICS**

Which simple machine has more mechanical advantage a pulley or a inclined plane? PlEASEE HELP SUPER CONFUSED
*June 27, 2011 by Jordan*

**Science**

Find the length of an inclined plane that will reach a platform 8ft high and form 16degree with the ground
*July 6, 2011 by Radzfar*

**Physics**

Find the length of an inclined plane that will reach a platform 8ft high and form 16degree with the ground
*July 6, 2011 by Radzfar*

**geometry**

plot the given points in a coordinate plane.then determine whether the line segments named are congruent. A(2,2),B(2,-1),C(0,-2),D(3,-2); _ and _ AB CD
*September 21, 2011 by sarena*

**physics**

An airplane flies north at a constant speed for 6h and covers a distance of 2400km. What is the plane's velocity? The acceleration?
*October 19, 2011 by Jordan*

**physics**

A 1.0kg ball initially at rest rolls down a plane at 35 degrees. pls i really need help
*November 10, 2011 by ted*

**Linear Algebra**

A test Question: Find the parametric equations of the line through the origin that is orthogonal to the plane 2x+4y-z=0
*December 14, 2011 by Simon*

**physics**

Devise a method for measuring the coefficient of friction between two surfaces using an inclined plane
*April 11, 2012 by myra*

**math**

can you please help. If a plane travels 550 kilometers per hour, represent the distance it will travel in h hours. thank you
*September 14, 2012 by kiki*

**PHYSICS**

A 3.1 kg bundle starts up a 30° incline with 139 J of kinetic energy. How far will it slide up the plane if the coefficient of friction is 0.30?
*November 8, 2012 by KRISTEL*

**math**

show that the locus of a point whose distances from two given planes are in a constant ratio, is a plane.
*January 15, 2013 by manjula*

**Physics 11**

A girl stands 2.5 m infront of a plane mirror. If she sees someone else 2.0 m behind her, how far is she from the image of that person?
*February 10, 2013 by Abe*

**physics**

A plane travelling at 15.2 m/s is brought to rest in a distance of 132 meters. To the nearest hundredth of a m/s2 what is the magnitude of its acceleration?
*May 22, 2013 by blah physics*

**Calculus Grade 12**

Find the equation of the plane that passes through the point (3,7,-1) and is perpendicular to the line of intersection of the planes x-y-2z+3=0 and 3x-2y+z+5=0
*June 10, 2013 by Amber*

**physics**

A trolley while going down an inclined plane has an acceleration of 2 cm/s2.What will be the velocity 3 secs after its start?
*August 10, 2013 by Anonymous*

**NS 2**

An object falls from a plane flying horizontally at an attitude of 40,000 ft. at 500 ml/hr. How long will take hit the ground?
*July 11, 2014 by jm*

**physics**

what is the t shirts vertical componet of its velocity at launch? if it launches straight at 45° above the horizontal plane at 141 /s?
*November 13, 2014 by robert*

**physics**

to view full image of an object 160 cm high, the minimum size of the plane mirror required is?
*December 31, 2014 by GM Chandio*

**math**

What is the shape of a linear function on a coordinate plane. choices are: a. circle b. ellipse c. vertical d. horizontal I chose "D"
*May 15, 2015 by tanisha*

**Inorganic Chemistry**

Which of the following molecules contain a C3 axis but not a σh plane? AlCl3 SeO3 SbBr3 PCl3
*March 5, 2015 by Joseph*

**briggs**

Compute the electric field about a uniformly charged plane sheet using gauss law.
*June 14, 2015 by clement*

**physics**

Compute the electric field about a uniformly charged plane sheet using gauss law.
*June 14, 2015 by clement*

**Physics**

A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, so that an emf of 0.65 V and a current of 3.4 A are induced in the coil. The wire is the re-formed into a single-turn square coil, which is used in the same ...
*April 10, 2013 by Anonymous*

**math**

If plane A took off in Chicago at 4:00pm and went 326mph the whole time, on it's way to Hartford,and plane B took off in Hartford at 4:00pm, and went 365mph the whole time, on it's way to Chicago, at what mile and over what state would they cross paths? To answer the question ...
*September 21, 2006 by Emily*

**Physics - maximum height of the projectile motion**

Suppose you knew the maximum height reached by a proejctile. Could you find its launch angle from this information alone? If not, what additional information would be required? (No it is not enough, the initial velocity? i also think yes because the highest the angle can be is...
*August 21, 2010 by Shaila*

**Physics**

Superman, who likes physics, dangles his watch from a thin piece of string while he is taking off from ground horizontally at a constant acceleration a. He notices that the string makes an angle of θ with respect to the vertical. After 18 seconds, his speed is v=116m/s. ...
*March 1, 2013 by Derrick*

**projectile motion**

A missile is fired upwards from the top of a cliff in a direction making an angle (not known ) with the horizontal. After 20seconds the projectile hits the ground at a point which is 1800metre from the foot of the tower of height 160metres. Find the angle of projection and the...
*June 16, 2014 by tanaiah*

**physics**

Your written homework will be graded entirely on the clarity and completeness of your derivation. No credit will be awarded for a final answer without a derivation. As usual, simplify your final answers as much as possible. A giant Pez dispenser of mass m rests on a ladder of ...
*April 11, 2013 by Nick*

**physics**

i have noo idea how to do this, please hellppppp A 15.6 kg block is dragged over a rough, hor- izontal surface by a constant force of 72.2 N acting at an angle of angle 34.8 above the horizontal. The block is displaced 24.6 m and the coefficient of kinetic friction is 0.234. ...
*February 25, 2011 by ally*

**physics **

A velodrome is built for use in the Olympics (see the figure below). The radius of curvature of the surface is 19.1 m. At what angle should the surface be banked for cyclists moving at 11 m/s? (Choose an angle so that no frictional force is needed to keep the cyclists in their...
*October 7, 2013 by nerma*

**chemistry**

a solution is prepared by mixing 2.17g of an unknown non-electrolyte with 225.0g of chloroform. The freezing point of the resulting solution is -64.2 C . The freezing point of pure chloroform is -63.5 C and its kf= 4.68C m^-1 . What is the molecular mass of the unknown? i know...
*February 10, 2014 by hershi*

**Health: Help for Mental and Emotional Disorders**

I really need help with this! I don't have a textbook, but I have an online book, but my computer won't open it. My teacher is not answering his phone. So I have no idea what the answers might be. Please help me! 1. A disorder in which intense anxiety or fear keeps a person ...
*October 26, 2012 by Jman*

**History**

How did Jackson's war on the Second Bank of the US end up causing economic depression? Answer : He claimed the National Bank was unconstitutional even though the Court ruled it as constitutional. He took federal funds out of the bank and ordered all western land to be made in ...
*January 28, 2015 by M*

**Math sin/cos**

On a piece of paper draw and label a right triangle using the given sides, solve for the unknown side and write the trigonometric functions for angles A and B, if a=5 and c=7. I already found side b which equals 2 sqrts of 6. Now I need to find the sin/cos of B SinB a)5/7 b)7/...
*March 10, 2007 by Anonymous*

**Algebra**

Isosceles triangle,two angles have the same measure. Determine the measure of the third angle in an isosceles triangle,if the third angle is 10 more than one-half of either of the equal measurements
*January 19, 2011 by Lee*

**Geometry**

Quadrilateral WXZY is a square. If YX = 30 and WT = 2x – 7, then find the value of x. (Points : 2) 4 18.5 11 15 or Quadrilateral JKLM is a rhombus. The diagonals intersect at N. If the measure of angle JKL is 104o, find the measure of angle JKN. (Points : 2) 52° 104° 26° 76°
*December 13, 2011 by Hope*

**physics**

A billiard ball of mass 0.16 kg has a speed of 1.80 m/s and collides with the side of the billiard table at an angle of 34.6°. For this collision, the coefficient of restitution is 0.841. What is the angle relative to the side (in degrees) at which the ball moves away from the...
*February 9, 2012 by sara*

**math**

Two sides of a triangle have lengths 15 m and 18 m. The angle between them is decreasing at a rate of 0.08 rad/s. Find the rate at which the area of the triangle is changing when the angle between the sides of fixed length is 120°.
*October 20, 2013 by christina*

**Physics **

two forces act concurrently on a 5kg block resting on a smooth horizontal surface a 5N force making a 40degree angle with the surface and a 10n making a 20degree angle with the surface. A) Determine the magnitude and direction of the net force acting on a box.
*July 18, 2011 by Edward*

**physics**

Two forces are applied to ring of a force table, one at an angle 20.0 degrees and the other at an angle of 80.0 degree. Regardless of magnitudes of the forces choose the corect response below. The equilibrant will be in the (a) first qudrant (b) second quadrant (c) thrid ...
*September 28, 2011 by lisa*

**chemistry**

The silicon wafer is coated with a layer of metallic aluminum which acts as an electrical contact. The x-ray diffraction pattern of aluminum is measured in a diffractometer with Fe Kα radiation. At what angle, θ, do you expect to observe the first reflection of ...
*January 12, 2013 by Anonychem*

**Chemistry**

calculate the freezing point of a solution containing 12.2 grams of benzoic acid, dissolved in 250 grams of nitrobenzene. the freezing point of nitrobenzene is 5.7 celsius and its freezing point depression constant is 7.0 celsius/m. please help
*October 27, 2008 by Joshua*

**Math**

The measure of two complementary angles are 6y+3 and 4y-13. Find the measures of the angles. ( In this question, are they saying 2 different complementary angle? or two angle that make up a complementary? )
*December 31, 2010 by Shadow*

**math**

In a triangle ABC , the internal bisectors of angles B and C meet at P and the external bisectors of the angles B and C meet at Q. prove that: angle BPC + angle BQC = 2 rt. angles.
*July 27, 2012 by sunny*

**geometry**

In a triangle ABC , the internal bisectors of angles B and C meet at P and the external bisectors of the angles B and C meet at Q. prove that: angle BPC + angle BQC = 2 rt. angles.
*July 27, 2012 by sunny*

**physics **

The angle of incidence and the angle of refraction for light going from air into a material with a higher index of refraction are 69.9° and 39.6°, respectively. What is the index of refraction of this material?
*March 18, 2014 by katie*

**Geometry**

Use the Law of Detachment to write a valid conclusion for the given information. 1.If two angles are supplementary, then their measures have a sum of 180. 2.Angle X and Angle Y are supplementary. -What do they mean when they ask me to write a valid conclusion?
*October 16, 2010 by Shadow*

**Geometry**

Use the Law of Detachment to write a valid conclusion for the given information. 1.If two angles are supplementary, then their measures have a sum of 180. 2.Angle X and Angle Y are supplementary. Would the conclusion be this? Thanks -The sum of X and Y is 180.
*October 17, 2010 by Shadow*

**trigonometry**

as you walk on a straight level path toward a mountain, the measure of the angle of elevation to the peak from one point is 33 degrees. From a point 1000 feet closer, the angle of elevation is 35 feet. How high is the mountain?
*January 29, 2013 by noel chavez*

**Math **

If A=<2,1> and B=<-1,1>, find the magnitude and direction angle for -2A +3B Find all specified roots: Cube roots of 8i A parallelogram has sides of length 32.7cm and 20.2cm. If the longer diagonal has a length of 35.1cm, what is the angle opposite this diagonal?
*July 30, 2014 by Jane*

**physics**

Initially, a particle is moving at 4.20m/s at an angle of 34.5∘ above the horizontal. Two seconds later, its velocity is 6.50m/s at an angle of 50.0∘ below the horizontal. What was the particle's average acceleration during these 2.00 seconds?
*September 21, 2014 by name*

**physics**

Initially, a particle is moving at 5.45 m/s at an angle of 38.5° above the horizontal. Four seconds later, its velocity is 6.24 m/s at an angle of 54.3° below the horizontal. What was the particle's average acceleration during these 4.00 seconds in the x-direction (enter first...
*February 4, 2015 by Brad*

**GEOMETRY**

cASEY SIGHTS THE TOP OF AN 84 FOOT TALL LIGHTHOUSE AT AN ANGLE OF ELEVATION OF 58 DEGREE. IF CASEY IS 6 FEET TALL, HOW FAR IS HE STANDING FROM THE BASE OF THE LIGHTHOUSE. I DO NOT UNDERSTAND WHAT IS ANGLE OF ELEVATION CAN YOU SHOW ME AN EXAMPLE PLEASE THANK YOU.
*April 12, 2015 by THOMAS*

**geometery**

Can you solve this problem: Identify the letter of the choice that best completes the statment or answer the question. Note: Since there is no symbol on the keyboard for the right angle sign I will use the greater than sign(<)right angle. The greather/less than sign for the...
*March 4, 2007 by Corynn*

**gen physics II**

A beam of light is incident upon a flat piece of glass (n = 1.50) at an angle of incidence of 45°. Part of the beam is transmitted and part is reflected. What is the angle between the reflected and transmitted rays?
*July 26, 2010 by Alinkashia*

**gen physics II**

A beam of light is incident upon a flat piece of glass (n = 1.50) at an angle of incidence of 45°. Part of the beam is transmitted and part is reflected. What is the angle between the reflected and transmitted rays?
*July 26, 2010 by Alinkashia*

**gen physics II**

A beam of light is incident upon a flat piece of glass (n = 1.50) at an angle of incidence of 45°. Part of the beam is transmitted and part is reflected. What is the angle between the reflected and transmitted rays?
*July 26, 2010 by Alinkashia*

**algebra**

one angle of a parrallelogram is 23 degrees less than six times the measure of the angle next to it.the sum of the measures of the angles is 180 degrees. find the measure of the adjacent angles of the parrallelogram.
*August 27, 2012 by angie*

**Physics**

Initially, a particle is moving at 5.40 m/s at an angle of 37.2° above the horizontal. Two seconds later, its velocity is 6.10 m/s at an angle of 55.0° below the horizontal. What was the particle's average acceleration during these 2.00 seconds in the x-direction and the y-...
*September 10, 2012 by Sam*

**trig**

Forces of 15 kg and 10 kg act on a point with an angle of 60◦ between the forces. Find the magnitude of the resultant force (to nearest tenth of a kilogram) and the angle (to the nearest degree) the resultant makes with the 15 kg force
*April 28, 2015 by syed*

**literature**

In what way does the setting of a small town during the Great Depression impact the characters and plot of "Gumption"? a. The characters can use their wealth to choose among many options for resolving conflicts. b. The characters are unconcerned about the way they live and ...
*October 12, 2012 by Ashley*

**precalculus**

Two people standing 30 feet apart look east at the top of a tree. The first person looks up at an angle of 78 degrees. The second person looks up at an angle of 62 degrees. How tall is the tree (to the nearest foot)?
*December 6, 2009 by Annie*

**chemistry**

what is the molecular geometry of IO3- when the angle is 105 degrees? What is it when the molecular geometry is 120 degrees? Which angle creates the most stable structure with the highest Boltzmann Distribution? Create a lewis structure that agrees with your findings?
*January 11, 2010 by bubble*

**Science**

A force of 20N is pushing a box at an angle of 50 degrees to the right of a dotted line. At what angle would a second force of 40N need to push in order to move the box straight in the direction of the dotted line?
*August 4, 2010 by Cassy*

**PHYSICS**

5.00x 10^-2 mass with charge +0.75 micro coulombs is hung by a thin insulated thread. Charge of -0.9 micro coulombs is held .15meters directly to the right so that the thread makes an angle with the vertical. What is the angle and the tension in the string?
*March 29, 2011 by T*

**physics**

On a 3 day hike a hiker walks 40 km due south the first day, 30 km at an angle of 40 degrees south of east the second day, and 25 km at an angle of 45 degrees north of west the third day. What is the person's displacement from her original position?
*September 26, 2011 by Samantha Murillo*

**maths**

A tree stands vertically on a hill side which makes an angle of 15 degree with the horizontal. From a point on the ground 35 meter down the hill from the base of the tree, the angle of elevation of the top of the tree is 60 degree. find the height of the tree.
*September 16, 2012 by Geeta negi*

**Trigonometry**

Height of a mountain While traveling across flat land, you notice a mountain directly in front of you. The angle of elevation to the peak is 2.5°. After you drive 18 miles closer to the mountain, the angle of elevation is 10°. Approximate the height of the mountain.
*February 4, 2013 by AwesomeGuy*

**Geometry Part 2**

A highway makes an angle of 6 with the horizontal.This angle is maintained for a horizontal distance of 5 miles.To the nearest hundredth of a mile, how high does the highway rise in this 5- mile section?Show the steps you use to find the distance.
*April 15, 2013 by Karen*

**physics**

a ball is thrown at a vertical velocity to an angle of 30 degree above the horizontal and rises to a maximum height of 50 meters.if the angle is tripled find the maximum height and the horizontal range of a projectile for the same intial velocity
*October 1, 2013 by Laila*

**math**

suppose that we are standing on a bridge 30 feet above a river watching a log (piece of wood) floating toward we. If the angle with the horizontal to the front of the log is 16.7 degree and angle with horizontal to the back of the log is 14 degree, how long is the log?
*March 1, 2014 by tabeershah*

**physics**

Two mirrors are placed at a 90° angle to each other. A light ray strikes one mirror 0.730 m from the intersection of the mirrors with an incident angle of 36.5°. The ray then travels a distance d before reflecting from the second mirror. (a) What is the distance d?
*May 12, 2014 by Christina*

**physics**

Taylor is interested in archery. She draws her bow and shoots an arrow at angle of 50°. It goes a distance of 100 meters. At what other angle could Taylor shoot an arrow with the same amount of force and have it go the same distance?
*April 2, 2015 by Cynethia *

**Physics**

Find the tension in each of the two ropes supporting a hammock if the first one is at an angle of 19.4° above the horizontal and the second is at an angle of 35.3° above the horizontal. The person sleeping in the hammock (unconcerned about tensions and ropes) has a mass of 60 ...
*July 7, 2015 by Tesia*

**geometry**

1. An exterior angle of a regular polygon measures 30 degrees. What is the measure of an interior angle? 30 60 120 150 2. How many degrees are in each interior angle of a regular pentagon? 50 72 108 120 3. If all of the diagonals are drawn from a vertex of a hexagon, how many...
*November 30, 2010 by Justin*

**number theory**

According to the Journal of Irreproducible Results, any obtuse angle is a right angle! Here is their argument. Given the obtuse angle x, we make a quadrilateral ABCD with DAB = x, and ABC = 90◦, andAD = BC. Say the perpendicular bisector toDC meets the perpendicular ...
*January 30, 2013 by kay*

**com/150**

I need help filling out Appendix D for my com/150. I need some help with my supporting details, and my subdetails. My thesis statement is "Instead of being the solution to larger issues like low self-esteem and depression, cosmetic surgery has became the issue". I just need a ...
*April 7, 2010 by Nikol*

**com/150**

I need help filling out Appendix D for my com/150. I need some help with my supporting details, and my subdetails. My thesis statement is "Instead of being the solution to larger issues like low self-esteem and depression, cosmetic surgery has became the issue". I just need a ...
*April 7, 2010 by Nikol*

**maths please help**

how do you find the isoperimetric quotient of an n sided figure? my side lengths are 5cm i have split it in to triangles so 360/n is the central angle then to work out area of singular triangle its 1/2 base times height height is something like tan 180/n =2.5 /height length ...
*October 12, 2006 by Spirit*

**physics**

Initially, a particle is moving at 5.30 m/s at an angle of 35.0° above the horizontal (+x axis). Two seconds later, its velocity is 5.97 m/s at an angle of 50.0° below the horizontal. What was the particle's average acceleration during this time interval? ________m/s2 (x ...
*November 10, 2012 by Ed*

**Physics**

Ok I asked this question before A lbock is given an intial speed of 4.0 s^-1 m up the 22 degree plane How far up the plane will it go ok I got this to be something like 2.2 about i understand this i need help on this how much time elapses before it returns to tis starting ...
*July 11, 2009 by Physics*

**Geometry**

The captain of a ship at point A and sailing toward point B observes a lighthouse at L and finds angle LAC to be 36*30'. After sailing 5 km to B, he observes angle LBC to be 73*. How many kilometers is position B from the lighthouse?
*June 9, 2012 by Denise*

**Mathematics**

The angle of elevation of the top of a flagpole from a point on the level ground is 30degrees. From another point on the ground 20m, nearer the pole the angle of elevation is 60degrees. Calculate the height of the pole?
*October 8, 2012 by Marydez*

**physics**

in physics, is it easier to pull a cart at a 45 degree angle or put an 8 ft board underneath, and pull it at a 20 degree angle?
*March 3, 2010 by Anonymous*

**GeOmEtRy!!!**

In triangle ABC,segment BF is the angle bisector of angle ABC, segment AE,segment BF, and segment CD are medians, and P is the centroid. Find x if DP=4x-3 and CP=30
*December 29, 2011 by VeRoNiCa C.*

**Math**

A circle is divided into 18 equal parts.How many degrees is the angle for each part? How many degrees is the angle for 5 parts into ?
*February 9, 2015 by Bryan*

**Physics**

A tennis ball of mass 0.0609 kg is served. It strikes the ground with a velocity of 52.5 m/s (117 mi/h) at an angle of 22.0° below the horizontal. Just after the bounce it is moving at 50.5 m/s at an angle of 17.7° above the horizontal. If the interaction with the ground lasts...
*March 29, 2011 by penny*

**Physics**

A tennis ball of mass 0.0609 kg is served. It strikes the ground with a velocity of 52.5 m/s (117 mi/h) at an angle of 22.0° below the horizontal. Just after the bounce it is moving at 50.5 m/s at an angle of 17.7° above the horizontal. If the interaction with the ground lasts...
*March 28, 2011 by Rob*

**Physics**

A tennis ball of mass 0.0609 kg is served. It strikes the ground with a velocity of 52.5 m/s (117 mi/h) at an angle of 22.0° below the horizontal. Just after the bounce it is moving at 50.5 m/s at an angle of 17.7° above the horizontal. If the interaction with the ground lasts...
*March 27, 2011 by Rob*

**physics**

1. A certain projectile is launched with an initial speed v0. At its highest point its speed is v0/6. What was the launch angle? 2. The "hang time" of a punt is measured to be 3.50 s. If the ball was kicked at an angle of 61.0° above the horizontal and was caught at the same ...
*October 3, 2012 by Franklin*