Friday

May 6, 2016
Number of results: 20,163

**Calculus**

An observer is 36m above the ground floor of a large hotel atrium looking at a glass-enclosed elevator shaft that is 26m horizontally from the observer. The angle of elevation of the elevator is the angle of the observer's line of sight makes with the horizontal (it may be ...
*March 10, 2015 by Zee*

**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 0.63 V and a current of 2.7 A are induced in the coil. The wire is then re-formed into a single-turn square coil, which is used in the same ...
*May 14, 2012 by M*

**The Ohio State University**

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 0.74 V and a current of 3.8 A are induced in the coil. The wire is then re-formed into a single-turn square coil, which is used in the same ...
*May 14, 2012 by Ryan*

**Math**

Use the figure to answer the following questions. figure for questions 1–3 1. Name a pair of complementary angles. (1 point) angle sign1 and angle sign4 angle sign1 and angle sign2 angle sign3 and angle sign4 angle sign1 and angle sign6 2. If mangle sign1 = 37°, what is the ...
*March 8, 2015 by Joe*

**Math**

Use the figure to answer the following questions. figure for questions 1–3 1. Name a pair of complementary angles. (1 point) angle sign1 and angle sign4 angle sign1 and angle sign2 angle sign3 and angle sign4 angle sign1 and angle sign6 2. If mangle sign1 = 37°, what is the ...
*March 10, 2015 by CONNEXUS ACADEMY*

**ONE world history question?**

1. All of the following events following WWI contribute to the beginning of WWII EXCEPT: Harsh peace terms angered Germany. Economic prosperity and increase in the European standard of living. The Great Depression allowed dictators to take control of European countries.*** if ...
*March 30, 2016 by Anonymous*

**Math**

1) Matt traveled the first leg of his trip for 1350 miles on a large jet. He then traveled an additional 600 miles on a private plane to reach his destination. If the speed of the jet was three times the speed of the plane and the total time in the air was 6 hours determine ...
*May 17, 2012 by Sara*

**Math**

The supplement of an angle measures 11 times its complement. Then the measure of the angle is... A. 9 degrees B. 81 degrees C. 90 degrees D. 99 degrees E. 100 degrees
*August 3, 2015 by Michelle *

**Math**

The given angle is in standard position. Determine the quadrant in which the angle lies. -25° A. Quadrant III B. Quadrant II C. Quadrant IV D. Quadrant I
*January 19, 2016 by Maddie*

**us history**

1. How did racism impact African American lives during the Great Depression and their access to New Deal programs? 2. How were African Americans able to create cultural power and how this impacted stereotypes and assumptions about the black community? 3. Who were some of the ...
*September 26, 2014 by Lavanessa Young *

**physics**

a roller coaster car moves 200 ft horizontally and then rises 135 ft at an angle of 30 degrees above the horizontal. It then travels 135 ft at an angle of 40 degrees downward. what is its displacement from its starting point? im not really sure what to do, I've drawn a graph ...
*September 2, 2008 by laura*

**physics**

school question? A long jumper travels 8.95 meters during a jump. He moves at 10.8 m/s when starts his leap. At what angle from the horizontal must he have been moving when he started his jump? You may need the double-angle formula: 2 sin u cos u = sin (2u)
*December 15, 2010 by kevin giordano*

**physics**

Consider the 692 N weight held by two cables shown below. The left-hand cable had tension T and makes an angle of θ with the wall. The right-hand cable had tension 760 N and makes an angle of 40◦ with the ceiling. a) What is the tension T in the left-hand cable ...
*September 19, 2010 by Cole*

**inverse trig function**

How do I do this by sketching a triangle. sin( arcsin(1/2) + arccos(1/2) ) Thanks. let's start with arcsin(1/2) draw a right angled triangle where theta and alpha are the two angles other than the 90º angle. suppose you make the opposite side 1, and the hypotenuse 2. Now look ...
*April 9, 2007 by Jen*

**Physics**

The 636 N weight held by two cables. The left-hand cable had tension 840 N and makes an angle of θ with the wall. The right-hand cable had tension 890 N and makes an angle of θ1 with the ceiling. a) What is the angle θ1 which the right-hand cable makes with ...
*January 9, 2011 by Mike*

**Physics**

The 636 N weight held by two cables. The left-hand cable had tension 840 N and makes an angle of θ with the wall. The right-hand cable had tension 890 N and makes an angle of θ1 with the ceiling. a) What is the angle θ1 which the right-hand cable makes with ...
*January 9, 2011 by Mike*

**psychology 220**

1.72 (1 pts.) Which of the following types of disorders would not meet the criteria for insanity according to the Insanity Defense Reform Act of 1984? A) schizophrenia B) major depression C) bipolar disorder D) antisocial personality disorder (my answer is "D antisocial ...
*December 9, 2012 by G. KAY*

**Geometry**

I have four questions: 1. The area of trapezoid ABCD is 60. One base is 4 units longer than the other, and the height of the trapezoid is 5. Find the length of the median of the trapezoid. 2. In trapezoid ABCD, line BC is parallel to line AD, angle ABD = 105 degrees, angle A...
*December 6, 2014 by jared*

**trig**

A coil of wire rotating in a magnetic field induces a coltage E=20sin((PIa/4) - (PI/2)). Use an identity to express this in terms of cos(PIa/4). Types of Identities: Double Angle, Half Angle, Sum and Difference of Sine, Cosine, and Tangent, Pythagorean, Reciprocal, Quotient. ...
*April 27, 2011 by Blake*

**Physics**

All answers should be in degrees. (a) Using the result of Lecture 31 Question 3, and Snell's law, derive and evaluate for the secondary rainbow for the following values of the incidence angle and index of refraction . 1 , 1.4 incorrect 45 , 1.3 incorrect 87 , 1.55 incorrect (...
*June 5, 2013 by P*

**pre-algebra **

Use the figure to answer the following questions. figure for questions 1–3 1. Name a pair of complementary angles. (1 point) angle sign1 and angle sign4 angle sign1 and angle sign2 angle sign3 and angle sign4 angle sign1 and angle sign6 2. If mangle sign1 = 37°, what is the ...
*February 26, 2016 by cupcakesss *

**geometry**

draw a triangle abc with abc ab =4.5 ,angle abc=35,angle acb=65
*November 26, 2012 by mudit*

**Math**

The measure of an angle is 4 times the measure of its complement. What is the measure of the angle's supplement?
*April 9, 2014 by Anonymous*

**geometry**

A loading dock ramp that is 14 feet long rises at an angle of 14.1° from the horizontal. Due to new design specifications, a longer ramp is to be used, so that the angle is reduced to 9.2°. How much farther out from the dock will that put the foot of the ramp?
*April 27, 2015 by houlh*

**science/math**

1. A light ray strikes a mirror at an angle of 42° from the surface of the mirror. What angle does the reflected ray make with the normal Ans. 42° 2. A ray of light hits a mirror at 27° from the normal. What is the angle between the reflected ray and the normal. Ans. 27°
*April 7, 2014 by need help*

**geometry**

An engineer determines that the angle of elevation from his position to the top of a tower is 55 degrees. The angle of elevation from 75 ft further away is 40 degrees. Determine the height of the tower to the nearest whole number.
*January 9, 2011 by Sebrenia*

**science**

The sun shines down on a mirror. The angle between the incident rays of sunlight and the vertical is 60o. What is the angle between the reflected rays and the vertical? I think the answer is 60 am i correct
*October 4, 2011 by Allison*

**vectors**

A box weighing 20 N, resting on a ramp, is kept at equilibrium by a 4N force at an angle of 20 degrees to the ramp, together with a friction force of 5N, parallel to the surface of the ramp. Determine the angle of elevation of the ramp.
*October 21, 2011 by Anonymous*

**math**

A tire swing is suspended from a tree. The swings height (in feet) above the ground is modeled by the equation, h = -12cos(x) + 15. (x is the angle measured in degrees). What is the height of the swing, when the angle is 60 degrees?
*November 13, 2011 by Anonymous*

**9th grade physics**

If a transparent material has a refractive of 2.0; a) calculate the critical angle b) if the refractive index were less than 2,0, would the critical angle be greater or less than before? Im super confused at this :(
*March 3, 2012 by Cathy*

**Maths**

A and B are two balloons at the same height and 1000 metre apart. O is a ground observation position. Angle AOX is 45 degree 15' and angle BOX is 10 degree and 30'. Find the height of the balloons.
*April 29, 2013 by Shane*

**Geometry**

at 10 feet away from the base of a tree, angle the top of a tree males with the ground is 61 degrees. of the tree grows at an angle of 78 degress with the respect to the ground, how tall is the tree to the nearest foot?
*June 1, 2014 by Walter*

**Trigo**

A vertical pole is standing on a slope that is inclined at an angle 8 degrees to the horizontal and casts a shadow that is 82 ft. long down the slope. How tall is the pole if the angle of elevation of the sun is 28 degrees?
*September 16, 2014 by Nik*

**Math**

Two ladders are the same distance from the base of a wall. The longer ladder is 15m long and makes an angle of 58 with the ground. if the shorter ladder is 12.6m long, what angle does it make with the ground?
*May 13, 2015 by Emily*

**Trigonometry**

Suppose *u* is a quadrant IV angle with cos(u) = 3/5. Suppose *v* is a quadrant IV angle with cos(v) = 12/13. Find the exact value of sin(u-v) I have gotten to sin120cos150 - sin150cos120 but I am not sure I am correct up to that point and I don't know where to go from there.
*April 17, 2016 by Lydia*

**Physics**

Consider a version of the atwood machine in which the masses are frictionless incline. The mass sliding on incline 1, m1, is 1.5 kg, and the angle of this incline is 62 deg. If the mass on the second incline, m2, is 2.5 kg, what is the angle 2 so that the system does not ...
*December 28, 2010 by rachel*

**Trigonometry**

Two sides of a triangle are 5 and 8 units respectively. If the included angle is changing at rate of one radian, at what rate is the third side changing when the included angle is 60 degrees?
*January 9, 2011 by may*

**physics**

Calculate the maximum height using the initial speed, half-time, and angle. The initial speeed is 18m/s, half time is 1.8, and the angle is 75. And how is this written out to solve.
*January 23, 2011 by Anonymous*

**Physics**

In an (x,y) co-ordinates system with x east and y north, an aircraft has the velocity components Vx = -170 ms-1 and Vy = 110 ms-1, and an acceleration of 6.4 ms-2 at an angle od 42 degree from the x axis. What is the angle of the velocity from the x=axis. And what is the y-...
*July 4, 2012 by Stupid Alex*

**Physics**

a shell is fired at a velocity of 300 m/s at an angle of 30. a. how far does it go? b. what are it's time of flight and maximum altitude? c. At what other angle could the shell have been fired to have the range?
*January 5, 2014 by Joyed*

**Angle of elevation**

A rocket fired straight up is tracked by an observer on the ground a mile away. a)Show that when the angle of elevation is theta, the height of the rocket in feet is h=5280tan(theta).
*February 6, 2014 by Kris*

**Circle geometry**

The endpoints of the arms of an inscribed angle are the endpoints of a diameter. What is the measure of the inscribed angle? How do you know? Please help and please explain how I would draw a diagram of thus. Think you for your help!
*April 23, 2014 by Cherie*

**Law of Sines**

In Triangle ABC, a=15cm, c=9cm, and angle C= 35 degrees. Find b and angle b. (Recall sin theta= sin (180 degrees-theta). I'm not sure how to approach this.
*September 6, 2014 by Richard*

**Math **

Two complementary angles, A and B, have measures in the ratio of 7 to 23, respectively. What is the ratio of the measure of the complement of angle A to the measure of the complement of angle B? Express your answer as a common fraction.
*March 4, 2015 by G*

**Physics**

A light Ray is incident at an angle of 45 degrees on one side of a glass plate of index of refraction 1.6. Find the angle at which the ray emerges from the other side of the plate
*August 4, 2015 by Gela *

**Calc.**

Determine the value of k so that the line with parametric equations x = 2 + 3t, y = -2 + 5t, z = k is parallel to the plane with equation 4x + 3y – 3z -12 = 0
*July 7, 2008 by Derek*

**english**

a special plane stood waiting for the president find the italicized word
*January 5, 2009 by yeshua*

**Math**

Which 3 x 3 matrix represents a reflection in the yz plane followed by inversion through the origin?
*February 24, 2009 by Alice*

**repost Calculus**

the length of the curve of intersection of the cylinder (4x^2) + y^2 = 4 and the plane x + y + z = 2 I'm so lost. Any help is appreciated!
*April 24, 2009 by Anonymous*

**Geometry**

draw a plane containing 4 coplanar points A, B, C, and D, with exactly 3 collinear poinys A, B, and D
*September 10, 2009 by Jameisha*

**Geometry**

Why is it impossible for a regular polygon with more than six sides to tessellate the plane?
*December 11, 2009 by Jackie*

**Math**

Why is it possible for a regular polygon with more than six sides to tessellate the plane?
*January 7, 2010 by Michelle*

**Math**

Find an equation of a plane through the point (1, 5, 1) which is orthogonal to the line x=3+5t y=5-1t z=-1+4t in which the coefficient of x is 5.
*February 1, 2010 by Derek*

**Calculus**

Find an equation of the tangent plane (in the variables x, y and z) to the parametric surface r(u,v) =(2u, 3u^2+5v, -4v^2) at the point (0,-10,-16)
*March 4, 2010 by Salman*

**Calculus**

Find an equation of the tangent plane (in the variables x, y and z) to the parametric surface r(u,v) =(2u, 3u^2+5v, -4v^2) at the point (0,-10,-16)
*March 4, 2010 by Salman*

**physics**

if a plane is flying 235 km/h and encounters west wind at 80 km/hr. What's its new velocity?
*September 1, 2010 by tatychass*

**geometry**

How do you use the distance formula to see if the segments on a cordinte plane are congruent?
*October 6, 2010 by Roberto*

**Linear algebra **

find an equation of a plane containing a point (0,6,-2) and parallel to vector v1= (0,-3,0), v2=(0,9,-1) Help!
*November 25, 2010 by J Velji*

**Math**

Let R be the plane region bounded by x=1, x=5, the x-axis and y=1/x. Approximate the are of R using 8 right rectangles.
*April 5, 2011 by Kelly*

**physcis**

use the principle of an incline plane and derive the coeffecient of stationary friction
*June 28, 2011 by merry light*

**physics**

a plane stops from 250 mph in 25 seconds. Calculate the planes acceleration
*September 24, 2011 by cj*

**calculus**

find the centroid of the plane region bounded by the curves y = cos x, y=sinx, x=0,
*October 31, 2011 by zoe*

**Calculus grade 12**

Explain why three directional vectors of the plane cannot me mutually perpendicular .
*May 3, 2012 by J*

**Calculus grade 12**

Explain why three directional vectors of the plane cannot me mutually perpendicular .
*May 4, 2012 by J*

**Calculus**

Find the vector and scalar equations of the plane containing the line r=(3,5,1)+t(-2,3,1) and the point (1,2,3)
*June 16, 2012 by Tom*

**physics**

two masses one on an inclined plane at 30 degrees the other suspended
*September 26, 2012 by k*

**maths**

the coordinates of a particle(m/s) in a plane at a given time(t),is 2t,t squared,determine of motion
*November 17, 2012 by oeme*

**maths**

find the equation of plane passing through point(0,7,-7) and containing line x+1/-3=y-3/2=z+2/1
*January 29, 2013 by Anonymous*

**algebra **

Write an inequality that describes the region of the coordinate plane not included in the graph of y<5x+1
*February 7, 2013 by Casey*

**Phyics**

How far does a 5-kg block with an initial speed of 3 m/s slide up a frictionless 28° incline plane?
*February 17, 2013 by Amy*

**Physical science**

How to draw 5 kg block on an inclined plane that isat 40 degrees to the horizontal?
*March 15, 2013 by Simphiwe*

**math**

A(4,7) and B(-3,2) are points on a coordinate plane.Find the coordinates of a point C on the x-axis such that AC=BC .
*March 30, 2013 by Coordinate Geometry*

**math**

n the xy -plane, the graph of y = x^2 and the circle with center (0,1) and radius 3 have how many points of intersection?
*April 1, 2013 by naomie*

**geometry**

n the xy -plane, the graph of y = x^2 and the circle with center (0,1) and radius 3 have how many points of intersection?
*April 2, 2013 by naomie*

**science**

suppose you are standing on a sidewalk . describe your motion relative to the car and the plane
*April 19, 2013 by jorge*

**chemistry**

the surface energy of plane of niobium.the heat of atomization is 745 kj/mol
*June 2, 2013 by himani.*

**Calculus Grade 12**

Determine the value of k such that the points (4,-2,6), B(0,1,0) and C(1,0,-5) and D (1,k,-2) lie on the same plane.
*June 10, 2013 by hanaya*

**Calculus grade 12 lines and planes**

Find the value of k so that the line [x,y,z] = [2,-2,0]+ t[2,k,-3] is parallel to the plane kx +2y - 4z= 12
*June 10, 2013 by Baljinder*

**Calculus**

Express the area of the region in the xy-plane enclosed by the curve ((x^(2))/(9))+((y^(2))/(4))=1 in terms of an integral.
*August 6, 2013 by Anonymous*

**HELP! Geometry**

How would you solve this? Graph each fi gure in the c oordinate plane. Find each perimeter. 14. X (0, 2), Y (4, 2 1), Z ( 2 2, 2 1)
*September 5, 2013 by Unknown*

**Math**

How do you find the distance and midpoint between two points in the coordinate plane?
*September 7, 2013 by Anonymous *

**phisecs**

A jet plane accelerates on a runway from rest at 4.03 m/s2. After 5 s, find its velocity in m/s?
*February 19, 2014 by sona*

**Physics**

Determine the displacement of a plane that experiences uniform acceleration from 77 m/s to 110 m/s in 16 seconds.
*February 22, 2014 by danielle*

**physics**

A plane cruising at 247 m/s accelerates at 28 m/s 2 for 8.7 s.How far will it have traveled in that time?
*October 22, 2014 by bill*

**eng**

if i write a story about experiencing a plane crash, what would the conflict be?
*October 26, 2014 by idk*

**Physics**

A 700 kg plane is traveling at 90 m/s at an altitude of 1500 m. What is the total mechanical energy?
*October 31, 2014 by Anonymous*

**Math**

If an airplane is traveling at 900 km/hr and slows to 450km/hr in 2.5 minutes. What is the plane's acceleration?
*January 22, 2015 by Anonymous*

**physics**

What percentage of the takeoff velocity did the plane gain when it reached the midpoint of the runway?
*January 26, 2015 by Anonymous*

**algebra 2a help**

True or False Complex numbers can be graphed on the real xy coordinate plane?
*November 19, 2015 by no of your business*

**math**

A plane claimed 10.000m in 19.4 minutes. What was the average rate per minute
*February 23, 2016 by Anonymous*

**Calculus**

Find the volume of the solid bounded below by the parabloid z = x^2 + y^2 and above by the plane 2x + z = 3
*April 10, 2016 by Macy*

**physics**

A light ray strikes a flat, L = 1.6 cm thick block (depth) of glass of refractive index 1.49 at an angle of 30 with the normal. Calculate the lateral shift of the light ray, d. there is a digram showing the light ray continuing at the same angle (30* to normal) until it exits ...
*April 27, 2010 by lauren*

**Algebra 1**

"The sum of two measures of two angles is 180 degrees. What is the measure of each angle if one angle is 30 degrees more than twice the other?" would the equation be: x+(2x+30)=180 ???? if it isn't, please explain! thanks!
*February 16, 2009 by Mel*

**Trig**

If I have a triangle with the hypotenuse side as 7, and the opposite side as 3, how would I find the angle? (This is a right triangle.) ......III .....IIII .7..IIIII ...IIIIII..3 ..IIIIIII _IIIIIIII<--90 degrees Find this angle
*March 23, 2010 by Jill*

**Calculus**

A ship sailing parallel to shore sights a lighthouse at an angle of 12 degrees from its direction of travel. After traveling 5 miles farther, the angle is 22 degrees. At that time, how far is the ship from the lighthouse?
*October 23, 2011 by Tim*

**Physics**

A rocket of mass 4.5 e5 kg is in flight. Its thrust is directed at an angle of 58.5° above the horizontal and has a magnitude of 7.50e6 N. Find the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizonal.
*February 10, 2012 by Joe*

**Calculus**

Vector C=5 and Vector D=8. The angle formed by C and D is 35 degrees, and the angle formed by A and C is 40 degrees. Determine |B|. Here is the image for triangle: imgur dot com/OZAwV please help, I have a test tomorrow~
*March 26, 2012 by Melinda*

**Physics**

A light ray traveling through air strikes a smooth, flat slab of crown glass at an angle of 30 degrees to normal. Index of refraction for crown glass is 1.66. What is the angle of refraction?
*April 22, 2013 by Brandon*

**MATH**

Use the figure to answer the following questions. figure for questions 1–3 1. Name a pair of complementary angles. (1 point) angle sign1 and angle sign4 angle sign1 and angle sign2 angle sign3 and angle sign4 angle sign1 and angle sign6 2. If mangle sign1 = 37°, what is the ...
*February 15, 2013 by Anonymous*

**physics**

An object is thrown up at an angle of 40.0 degree above the horizontal and reaches a maximum height H. If the angle is now doubled to 80.0^degree, but nothing else is changed, its maximum height will be a. 1.67 H. b. 2.00 H. c. 2.35 H. d. 4.00 H.
*January 25, 2011 by andrea*