Friday

November 21, 2014

November 21, 2014

Number of results: 16,816

**algebra **

Describe what are the graphs of the intervals [-4,10], (-4, 10], [-4, 10) and (-4, 10) looks like. Are these graphs in the xy-plane or on the number line?
*January 11, 2011 by wendi *

**Precalculus **

1. Simplify the expression ((5x^-2)/(4x^2))^-2 2. (x)/(x^2-81)-(9)/(81-x^2) = 3. Let (-3,3) and (-6,_2) be points in the Cartesian plane. Find the distance between the points.
*January 23, 2011 by Amy*

**trig**

The parametric equations for a curve in the x-y plane are x=2+t^2 and y=4-3t. Determine the points where the curve intersects the x-axis.
*April 19, 2011 by casey*

**science**

if a plane drops a bomb, does the bomb fall straight down, or behind or forward?
*May 18, 2011 by janet*

**math**

In the xy-coordinate plane, the distznce between point B(15,7) and point A(x,15) is 17. What is one possible value of x?
*January 19, 2013 by Ana*

**physics**

If you run away from a plane mirror at 2.35m/s , at what speed does your image move away from you?
*June 6, 2013 by Avantika*

**Calculus**

Find the point at which the line intersects the given plane. x = 4 − t, y = 5 + t, z = 2t; x − y + 3z = 3 (x, y, z) =____________?
*January 31, 2014 by bilal*

**Calculus**

Find the point at which the line intersects the given plane. x = 1 + 4t, y = 4t, z = 2−3t ; x + 2y − z + 1 = 0 (x, y, z) = _____________?
*January 31, 2014 by balal*

**dynamics**

example of every types of motion *translation *rotation *general plane motion
*September 8, 2014 by aira*

**calculus**

Find the point on the plane z = 6x + 9y + 1 closest to the point P = (1, 0, 0). Hint: Minimize the square of the distance. (x, y, z) =
*October 16, 2014 by Anonymous*

**Physics Classical Mechanics**

A railroad gun of mass M = 2.0 kg fires a shell of mass m=1.0 kg at an angle of θ= 40.0 ∘ with respect to the horizontal as measured relative to the gun. After the firing is complete, the final speed of the projectile relative to the gun (muzzle velocity) is v0=110....
*October 28, 2013 by Anonymous*

**EARTH SCIENCE**

1. Which gas is a source of natural groundwater pollution? A. Carbon B. Oxygen C. Hydrogen D. Radon D? 4. A stream channel is formed when water A. carves a very deep and wide channel into rock. B. carries minerals into the ocean. C. creates a depression, which forms a lake. D...
*January 8, 2014 by Beatrice*

**EARTH SCIENCE**

1. Which gas is a source of natural groundwater pollution? A. Carbon B. Oxygen C. Hydrogen D. Radon D? 2. A stream channel is formed when water A. carves a very deep and wide channel into rock. B. carries minerals into the ocean. C. creates a depression, which forms a lake. D...
*January 23, 2014 by Beatrice*

**physics**

A car of weight W = 12.3 kN makes a turn on a track that is banked at an angle of θ = 20.9°. Inside the car, hanging from a short string tied to the rear-view mirror, is an ornament. As the car turns, the ornament swings out at an angle of φ = 28.3° measured from the...
*August 1, 2012 by ayhan*

**Math **

A rocket shoots straight up from the launch-pad. Five seconds after lift-off, an observer 2 miles away notes that the rocket's angle of elevation is 3.5 degrees. Four seconds later the angle of elevation is 41 degrees. How far did the rocket rise during those 4 seconds.
*September 29, 2012 by Lianne*

**Geometry**

5. What theorem do Exercises 1-4 prove? (1 point) Triangle Inequality Theorem Converse of the Angle Bisector Theorem Angle Bisector Theorem Triangle Midsegment Theorem
*January 1, 2011 by Anonymous*

**physics**

a rifle that has been ‘sighted in' for a 91.4-meter target. If the muzzle speed of the bullet is v0 = 328 m/s, there are the two possible angles è1 and è2 between the rifle barrel and the horizontal such that the bullet will hit the target. One of these angles is so large that...
*February 10, 2011 by tish*

**Physics (please help!!)**

A suitcase of weight mg = 450 is being pulled by a small strap across a level floor. The coefficient of kinetic friction between the suitcase and the floor =0.640 a) Find the optimal angle of the strap above the horizontal. (The optimal angle minimizes the force necessary to ...
*February 18, 2011 by Catherine*

**Precalculus**

When a projectile leaves a starting point at an angle of elevation of theta with a velocity v, the horizontal distance it travels is determined by: d=v^2/(32) sin2theta Where d is measured in feet and v in feet per second. An outfielder throws the ball at a speed of 75 miles ...
*January 31, 2012 by jake*

**math**

how do we indicate the congruence at two triangles with two sides and the contained angle of the one equal two corresponding sides and the corresponding contained angle of the other ?
*April 17, 2008 by mota*

**physic**

A laser beam in air is incident on a liquid at an angle of 40.0^\circ with respect to the normal. The laser beam's angle in the liquid is 25.0^\circ.What is the liquid's index of refraction?
*January 28, 2010 by elina*

**psychology 220**

# 1.55 (1 pts.) Which of the following information led Dr. Tobin to conclude that Peter was suffering from bipolar disorder? A) the fact that he reported having intense bouts of anxiety B) the fact that he had recently been married and soon after was divorced C) the fact that...
*December 9, 2012 by G. KAY*

**Physics**

You are riding on a jet ski directed at an angle upstream on a river flowing with a speed of 2.8 m/s. If your velocity relative to the ground is 8.2 m/s at an angle of 25.0° upstream, what is the speed of the jet ski relative to the water?
*August 28, 2011 by Nikki*

**Trig**

A 60-foot flagpole stands on top of a building. From a point on the ground the angle of elevation to the top of the pole is 45 degrees and the angle of elevation to the bottom of the pole is 42 degrees. How high is the building?
*January 19, 2013 by Stephanie*

**math - trig**

1. Find csc A, cos A and tan A of an angle A whose terminal side contains (– 12, – 5). 2. Find sin X, sec X and cot X of an angle X whose terminal side contains (– 3, 5).
*June 11, 2013 by Annika*

**Math**

A wire to the top of a tower makes an angle of 52 with the le el ground. At a point 32 ft. Farther from the base of the toser and in líne with the base of the wire, the angle of elevation to the top of the toser is 21. What is the length of the tower.
*March 4, 2014 by Hannah*

**Statics**

If both the projection Pa and component Fb of the force F are 305 N, determine the magnitude F and the orientation è of the b-axis. There is a 70 degree angle from the negative y-axis to the a-axis. There is a 108 degree angle from the negative y-axis to the force.
*September 1, 2014 by Tim*

**math**

The diagram of airport runway intersections shows 2 parallel runways. A taxiway crosses both runways. If angle 8 measures 119, what is the sum of the measures of angle 1 and 4? a 122 b 238 c 119 d 299 I think the answer is b. Angles 1,4,5, and 8 are either alternate or ...
*November 23, 2007 by keisha*

**physics**

A coating of MgF2 (n = 1.38) is deposited on a glass plate (n = 1.50). Light is incident (from air) onto the plate at angle 60¡ã degrees from the normal to the surface. (Note that this is not nearnormal incidence and you will have to adjust the equations to allow for the angle...
*April 25, 2012 by Evangline*

**Science**

1) A block of mass 0.5 kg is placed at the highest point of a fixed smooth sphere of radius 0.5m. The block is gently pushed to one side. Calculate: 0 the 3 o (1) force exerted by the block on the sphere when it makes an angle with the vertical. (ii) At what angle does it ...
*May 10, 2012 by Vikas*

**math**

A vertical line is all rise. If there is no y value then how does this become a line in the x-y plane? can someone please help
*May 10, 2009 by angela*

**Math - Equations of planes**

Write a vector equation and scalar equation of the plane containing lines [x,y,z]= [-2,3,12]+s[-2,1,5] [x,y,z]= [1,-4,4]+t[-6,3,15]
*August 27, 2010 by Shaila*

**Vectors**

Given vectors A = -4.8i + 6.8j and B = 9.6i + 6.7j, determine the vector C that lies in the xy plane perpendicular to B and whose dot product with A is 20.0.
*September 28, 2010 by Victor*

**physics**

Im confused! How would you calculate the work done by a plane? I know work= f d, i just dont know how to get the force and distance!
*November 30, 2010 by Maddi*

**Pre-Calc**

I am seeking help with this problem Please...Thank you! Find the point on the line y=x+3 in the xy-plane that is closest to the point (3, 2)
*December 7, 2010 by Roy*

**physics**

Calculate the Mechanical Advantage for an incline plane that raises the load to 2.4 meters and has a length of 13.8 meters.
*December 13, 2011 by carlos*

**geometry**

The verticals of quadrilateral ABCD are given. Draw ABCD i'n a coordinate plane and show that it is a parallelogram
*January 11, 2012 by Hayle*

**Calculus**

Explain why the plane with Cartesian equation 2x+5z-3=0 never intersects the y-axis. Answer:Because there is no y-value in the equation?
*April 8, 2012 by Jenny*

**science physic**

If a ball rolls down an inclined plane and picks up 4 m/s each second it rolls, its acceleration is
*January 30, 2013 by denise*

**Calculus**

Find the equation of the tangent plane and symmetric equation for the normal line to the given surface at P: xy^2 + zy^2 + 4y -xz^2 = 18 P(-2,0,3)
*June 2, 2013 by Kim*

**Calculus**

Find the equation of the tangent plane and symmetric equation for the normal line to the given surface at P: xy^2 + zy^2 + 4y -xz^2 = 18 P(-2,0,3)
*June 2, 2013 by Elyse*

**english**

The plane came down later than expected. In this sentence ,what part of speech is the word down?
*January 17, 2014 by jackie*

**Math**

Find a scalar equation of the plane that contains the given point P=(-3,-3,1)and the given normal vector n = (-1,4,7)
*September 24, 2014 by Wiz*

**Algebra**

Find a scalar equation of the plane that contains the given point P=(-3,-3,1)and the given normal vector n = (-1,4,7)
*September 24, 2014 by Paul*

**Math**

Find a scalar equation of the plane that contains the given point P=(-3,-3,1)and the given normal vector n = (-1,4,7)
*September 24, 2014 by Aegon*

**math**

Find a scalar equation of the plane that contains the given point P=(-3,-3,1)and the given normal vector n = (-1,4,7)
*September 24, 2014 by Jon*

**math**

Find a scalar equation of the plane that contains the given point P=(-3,-3,1)and the given normal vector n = (-1,4,7.
*September 24, 2014 by Tech Nine*

**Math**

Find a scalar equation of the plane that contains the given point P=(-3,-3,1)and the given normal vector n = (-1,4,7)
*September 25, 2014 by Tech N9ne*

**Precalc**

Assume that points A(5, 10, 1), B(6, 3, 6), and C(12, 1, 4) are on a plane. Find vector AB and vector AC.
*January 7, 2012 by Grace*

**Precalc**

Assume that points A(5, 10, 1), B(6, 3, 6), and C(12, 1, 4) are on a plane. Find vector AB and vector AC.
*January 7, 2012 by Grace*

**Geometry**

One side of a triangle is x inches longer than another side. The ray bisecting the angle formed by these sides divides the opposite side into 3-inch and 5-inch segments. Find the perimeter of the triangle in terms of x. ( triangle angle bisector theorem) Let y be the small ...
*January 13, 2012 by Anonymous*

**Physics**

A ray of light stikes a flat 2 cm thick block of ice (n=1.5) at an angle of 45 degrees. Refracted ray travels through the glass and then is refracted back to air at the opposite side of the block. Find the angles of incident and refraction at each surface. Snell's law states ...
*April 16, 2008 by Andrea*

**Physics**

An explorer in the dense jungles of equatorial Africa leaves his hut. He takes 41 steps at an angle 45∘ north of east, then 81 steps at an angle 60∘ north of west, then 49 steps due south. Assume his steps all have equal length. Save him from becoming hopelessly ...
*January 19, 2014 by christina*

**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*

**algebra**

a landing airplane, moving in a straight line , passes over two points (p and q) which are 300 feet apart. when the airplane is above p, as seen from Q, its angle of elevation is 60 degress, and when above Q, as seen from p, its angle of elevation is 40 degress. at what ...
*July 19, 2011 by alex*

**physics**

A plane designed for vertical takeoff has a mass of 51 kg. Find the net work Wnet as it accelerates upward at 1 m/s2 through a distance of 34 m after starting from rest.
*December 8, 2010 by anna*

**Calculus**

Hi, I'm absolutely stuck on this problem. This is for a newton's method/linearization unit. Find an equation for the curve in the xy-plane that passes through the point (1,-1) if its slope at x is always 3x^2+2.
*January 1, 2011 by Jay*

**physics**

.250 kg toy airplane is suspended from the ceiling in a conical pendulum. It flies with a radius of 10 cm, and has a period of 20 seconds. Find the centripetal force acting on the plane?
*May 14, 2011 by Elizabeth*

**calculus **

Use the shell method to set up and evaluate the integral that gives the volume of the solid generated by revolving the plane region about the x-axis: Y=sqrt(x+2), y=x,y=4
*May 2, 2012 by carlton*

**Physics**

In the figure below, m1 = 3.8 kg, m2 = 5.2 kg, and the coefficient of kinetic friction between the inclined plane and the 3.8-kg block is μk = 0.3. Find the magnitude of the acceleration of the masses and the tension in the cord.
*September 26, 2012 by Tara*

**Maths**

Three circles are placed on a plane in such a way that each circle just touches the other two each having a radius of 10 cm. Area of the region enclosed by them.
*December 31, 2012 by Shruti katiyar*

**Physics**

Posted by Dan on Thursday, February 21, 2013 at 11:17pm. Plane flying southwest at 155mi/hr. their is a wind from the west at 45.0mi/hr. what's the planes new velocity
*February 22, 2013 by Rick*

**physics**

A hoop of radius 0.50 m and a mass of 0.20 kg is released from rest and allowed to roll down an inclined plane. How fast is it moving after dropping a vertical distance of 3.0 m ?
*May 2, 2013 by Rayn*

**Math (Calculus)**

Use the shell method to set up and evaluate the integral that gives the volume of the solid generated by revolving the plane region about the y-axis. y=4-x^2, y=0
*May 8, 2014 by Sherman*

**physics**

An airplane is flying at constant speed of 500 km/h on a straight line at 33000 feet above sea level. What is the net force acting on the plane?
*November 18, 2014 by Anonymous*

**physics**

An airplane is flying at constant speed of 500 km/h on a straight line at 33000 feet above sea level. What is the net force acting on the plane?
*November 18, 2014 by Anonymous*

**Math **

tan(-120)= sqrt 3 OR - sqrt 3 (Helper stated that it was sqrt 3) But, I'm just confused over this part: for even vs. odd functions it saids that tan(-angle) = - tan(angle) so the even vs. odd doesn't matter since tan is positive in the QIII?
*March 1, 2011 by Amy*

**maths**

Choose the two options which are true for all values of x 1) cos (x) = cos ( x – pie/2) 2) sin (x + pie/2) = cos (x – pie/2) 3) cos (x) = sin (x – pie/2) 4) sin (x) = sin (x + 4pie) 5) sin (x) = cos (x – pie/2) 6) sin^2 (x) + cos^2 (x) = pie would it be 1 and 3 ?? I helps if ...
*April 22, 2007 by katie*

**calculus**

Could someone help me draw these vectors? These things confuse me. A force of 42 newtons acting on an object at an angle of 53 degrees with the ground A force of 342 lbs. acting on an object while a force of 454 pounds acts on the same object an angle of 94 degrees with the ...
*February 21, 2010 by Jim*

**geometry**

Hi! I have a Geometry worksheet I need to get done for tomorrow. It's a really easy thing, I guess...but I'm a bit stuck. The measure of an angle is six more than twice the measure of its supplement. Find the measure of the angle. A. 58 B. 62 C. 118 D. 122 It doesn't have a ...
*February 23, 2009 by mathdork*

**Engineering**

The boat is to be pulled onto the shore using two ropes. If the resultant force is to be 400N, directed along the keel, determine the magnitudes of forces T and P acting in each rope and the angle theta of P so that the magnitude of P is a minimum. T acts at 30 degrees from ...
*October 13, 2009 by Claire*

**college physic**

a rifle that has been ‘sighted in' for a 91.4-meter target. If the muzzle speed of the bullet is v0 = 328 m/s, there are the two possible angles è1 and è2 between the rifle barrel and the horizontal such that the bullet will hit the target. One of these angles is so large that...
*February 23, 2011 by jc*

**Chemistry**

I am stuck in this problem I need to calculate the molality first so I could find T but I don't know which one is the solvent and which one is the solution the problem is to calculate the freezing point of a solution containing 12.2g of benzoic acid, dissolved in 250g of ...
*October 27, 2008 by Maria*

**precalculus**

If a projectile is fired with velocity v0 at an angle θ, then its range, the horizontal distance it travels (in feet), is modeled by the function R(θ) = v02 sin 2θ 32 . If v0 = 2600 ft/s, what angle (in degrees) should be chosen for the projectile to hit a ...
*October 28, 2012 by Ama*

**Physics**

Leg traction is applied to a patient's leg as shown in the figure below. If the physician has requested a 57 N force to be applied to the leg, and the angle is θ = 60o , what mass m must be used for the object hanging from the massless cable? So < represents angle ...
*October 14, 2009 by Sam*

**Geometric & Wave Optics**

A beam of light wavelenght 560 to availing in air is incident on a surface of a transparent material. The incident beam makes an angle of 65degree with the normal and the refracted beam makes an angle of 45degree with the normal. calculate the refractive index of the material.
*July 21, 2009 by Matrix School 2*

**math**

An electric pole is supported to stand vertically on a level ground by a tight wire. The wire is pegged at a distance of 6 meters from the foot of the pole. The angle that the wire makes the ground is three times the angle it makes with the pole. Calculate the length of wire ...
*May 29, 2012 by Anonymous*

**Math**

At a distance of 56 feet from the base of a flag pole, the angle of elevationi to the top of a flag that is 3.1 feet tall is 25.6 degrees. the angle of elevation to the bottom of the flag is 22.9 degrees. the pole extends 1 foot above the flag. find the height of the pole.
*April 7, 2012 by Tina*

**math**

Charlotte divided a whole pizza into 4 pieces. one piece formed a straight angle. one piece formed a right angle. 2 pieces formed acute angles with the same degree. Draw the angles
*February 18, 2014 by tommi*

**PSYCHOLOGY**

How do classical conditioning procedures differ from operant conditioning procedures? How are they similar? In your opinion, which learning process is more effective? Why? How do we see observational learning being used in the work place? How do we see observational learning ...
*April 7, 2010 by MISSY*

**geometry**

place each given figure in a coordinate plane. what are the coordinates of each vertex? a) a right triangle b) an isosceles triangle
*February 2, 2008 by anne*

**Physics**

a plane flying at 90 degrees and 100 ms is blown toward 180 degrees at 50 ms. What is the resultant velocity and direction?
*October 25, 2010 by Jennifer *

**vectors**

find the vector form of the equation of the line in lR^3 that passes through P=(-1,0,3) and is perpendicular to the plane with a general equation x-3y+2z = 5
*January 12, 2011 by Meso*

**magee **

Whenever you use a inclined plane a. deis ezual to dr b. dris zero, c. deis less than dr, d. de is greater than dr
*January 17, 2011 by Bet*

**geometry**

when two angles in a plane share a vertex and a side but no common interior points, they are called_________ angles ?
*August 10, 2011 by christina*

**algebra**

the plane flies 725 miles per hour. how many minutes will it take to fly 150 miles
*September 15, 2011 by anthony*

**physics**

suppose a plane drops water from 1024 feet. how many seconds will it take for the water to hit the ground?
*October 19, 2011 by grant*

**trigonometry**

A pilot is flying with an air speed of 185mph. Find the ground speed of plane and the direction of flight.
*November 15, 2011 by Anonymous*

**geometry**

An airplane descends 3.5 miles over a horizontal distance of 25 miles. How far did the plane actually travel?
*January 18, 2012 by Todd*

**Physics**

If the block slides down the incline at a constant speed, what is the force of friction between the block and the plane?
*January 22, 2012 by Katherinee*

**math**

when a cross tile is placed on a number plane the centre number is the average of al the numbers covered. Explain why
*April 16, 2012 by julia*

**physics**

an object is moving up and inclined plane its velocity changes from 15 cm\sec to 10 cm\sec in 2 seconds .what is its acceleration solve
*July 6, 2012 by Anonymous*

**physics 11**

A girl stands 2.5 m infront of a plane mirror. If she steps 0.5 m farther away from the mirror, how far will she be from her image?
*February 10, 2013 by Abe*

**maths**

Two points X and Y in the xy plane have coordinates (10,5) and (a,b), respectively. The midpoint of the line segment XY has coordinates (13,13). What is the value of a+b?
*June 8, 2013 by vranda*

**physics**

A bomb is dropped out of a plane 100 m above the ground, how fast will it be moving when it hits the ground?
*January 23, 2014 by Marina*

**math**

15. which of the following figures will not tessellate the plane? a. rhombus b. equilateral triangle c. regular hexagon d. regular pentagon
*April 18, 2014 by Anonymous*

**math **

A rectangle is plotted in the coordinate plane. The vertices (corners) of the rectangle are given as A(–2,3), B(4,3); C(–2, –2) and D(x,y). What is the ordered pair for point D?
*May 13, 2014 by Anonymous*

**mathematics **

The plane curve is given by the equation R(t)= ( ln sin t)i + ( ln cos t)j. find the unit normal vector to the curve t= ¤Ð/6.
*June 27, 2014 by sibongile*

**Linear Algebra**

Find a scalar equation of the plane that contains the given point P=(-3,-3,1)and the given normal vector n = (-1,4,7)
*September 24, 2014 by Aegon*

**Reading**

The Great Depression http://encarta.msn.com/encyclopedia_761584403/Great_Depression_in_the_United_States.html
*March 26, 2007 by Catie*

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