Saturday

April 19, 2014

April 19, 2014

Number of results: 102,223

**Algebra Grade 7 (Rotation)**

have you looked at an analog clock? do you know that 90° is 1/4 the way around? do you know which direction is clockwise?
*Thursday, November 29, 2012 at 2:00pm by Steve*

**Algebra Grade 7 (Rotation)**

If you rotate a clock clockwise 90° from 3:00, what will it be?
*Thursday, November 29, 2012 at 2:00pm by rawr... im a dinosaur.... rawr*

**physics**

(a) rotation around sticky hinge (b) rotation of screw (c) rotation around fulcrum of lever
*Monday, February 24, 2014 at 10:09pm by Damon*

**math**

No, if your trapezoid is in quadrant 4, then a rotation of 90ºwould put you in quadrant 1, (counterclockwise is the positive rotation in math). Consider a possible point on the original trapezoid, lets say (5,-2) Its image point would be (2,5) So under a rotation of 90º any ...
*Tuesday, December 11, 2007 at 7:32pm by Reiny*

**math**

Which transformation moves the figure from position A to position B? then it shows a picture of a heart like one thats facing u and the other one is sideways. is the answer a-rotation, b-reflection, c translation d-rotation and translation, i think its d also what does ...
*Sunday, April 15, 2012 at 1:54pm by Gabby ( 5 grade)*

**Geometry/Algebra/Calculus**

the problem is, that to rotate a curve, there has to be a variable radius of rotation. You have the 2pi, but don't specify what the radius of rotation is. area needs to be in square units, but you only have r once, a linear unit.
*Sunday, January 26, 2014 at 1:46am by Steve*

**Chemistry**

If the specific rotation of Compound X is (-) 123.8º, what would be the observed rotation of its enantiomer, Compound Y, assuming the concentration and cell path length is the same? b. If a racemic mixture of Compound X and Compound Y were analyzed, what would be the observed ...
*Thursday, March 31, 2011 at 9:09pm by Nicole*

**algebra**

1. Are the rotations of figures always congruent? Why are or why not? 2. A car tire rotates when you drive. How is this type of rotation different from a rotation in Geometry? What other type of transformation is happening to the car tire? Explain.
*Friday, September 6, 2013 at 1:46pm by Unknown*

**Math**

Can anyone please rephrase this. I really can't understand this term. Rotation symmetry: When a shape or design can be turned about its center of rotation, so it fits onto its outline MORE than once in a complete turn(360 degrees) I don't understand this. I don't get what ...
*Thursday, February 4, 2010 at 8:37pm by Sara*

**Another astronomy (algebra-based physics) question**

I’d prefer thorough solutions, but if you can only provide formulas that would solve each part of the problem, that’d be helpful too :-) Thanks! Spinning too fast The rate of rotation of astrophysical objects that are held together by gravity (e.g., stars or planets) cannot be...
*Wednesday, March 4, 2009 at 4:23am by Mark*

**Chemistry(Please help)**

I know that to calculate the specific rotation for a compound you do observed rotation / path length(dm) * conc. (g/ml). I am confused about how to calculate the specific optical rotation for a compound. Thank you for your help!
*Sunday, October 28, 2012 at 3:02pm by Hannah*

**math**

what is the difference between translation , rotation, relections, and dilation in 8 grade work In 8th grade talk, I recommend you check the examples in your book. OR, if you put your definitions here, I can critique them.
*Sunday, January 28, 2007 at 10:59am by jose*

**PreCalculus**

Problem: Identify the conic from the equation 13x^2-6(sq.rt.6)xy+7y^2-16=0 I have to choose from the following four answers: hyperbola (angle of rotation 45) hyperbla (angle of rotation 60) ellipse (angle of rotation 90) ellipse (angle of rotation 30) I used the discriminant...
*Monday, March 30, 2009 at 7:08pm by Joanie*

**4th grade**

It is due to the rotation of the Earth.
*Monday, March 30, 2009 at 5:14pm by E.G.*

**math**

What is the rule for finding coordinates after a 90 degree rotation? after a 180 degree rotation? after a 270 degree rotation?
*Wednesday, November 16, 2011 at 5:33pm by Kory*

**math**

360º = a complete rotation; the person only turned a half rotation
*Saturday, June 9, 2012 at 3:27am by PsyDAG*

**7th grade math**

what is angle of rotation?
*Wednesday, January 6, 2010 at 5:57pm by Jacqulynn *

**physics**

That force East is opposed by Earth. Actually, the motorcycle is starting to increase the speed of rotation of Earth,but is is very massive, and the change in rotation is very, very small. Since the Earth is opposing this motion, it is pushing back on the motorcycle westward, ...
*Tuesday, January 28, 2014 at 10:30am by bobpursley*

**physics**

This question begs for correction, as it is based on faulty reasoning. The centripetal force is about the center of rotation, not the center of the earth. When a mass is placed in orbit, take the moon for instance, both the moon and the Earth rotate about the center of ...
*Tuesday, May 14, 2013 at 8:05pm by bobpursley*

**Algebra Grade 7 (Rotation)**

actually, upon reading the question carefully, it occurs to me that it's still 3:00, no matter what you do with the clock! In fact, reading even more carefully, "it" will still be a clock! Doesn't mater what time it is.
*Thursday, November 29, 2012 at 2:00pm by Steve*

**6th grade science**

so I believe the answer to this question would be crop rotation?
*Friday, November 11, 2011 at 6:03pm by Kate*

**MATH**

Figures that correspond under a translation, rotation, or reflection are said to be translation congruent, rotation congruent, or reflection congruent. Position two congruent figures on a piece of paper to satisfy each combination of congruences listed. Use tracing paper, ...
*Friday, August 28, 2009 at 8:01am by Anonymous*

**geometry**

Figures that correspond under a translation, rotation, or reflection are said to be translation congruent, rotation congruent, or reflection congruent. Position two congruent figures on a piece of paper to satisfy each combination of congruences listed. Use tracing paper, ...
*Saturday, October 24, 2009 at 12:50am by jeng*

**Fourth Grade Geometry**

Could someone tell me what the definitions of translation, reflection and rotation mean?
*Wednesday, January 9, 2008 at 5:02pm by Tremaine*

**physics**

They are not asking for the force. They want the speed due to the rotation of the earth. That equals R*w. R is the earth radius and w is its rotation rate in radians per second.
*Thursday, December 15, 2011 at 4:35pm by drwls*

**analytic geometry**

how to convert the small rotation of axes into capital rotation of axes?
*Wednesday, October 3, 2012 at 11:41am by shah*

**Physics**

Which produces the largest torque? 30.0 N perpendicular to the center of rotation at a radius of 1.5 m 30.0 N perpendicular to the center of rotation at a radius of 0.25 m 60.0 N perpendicular to the center of rotation at a radius of 1.0 m 60.0 N perpendicular to the center of...
*Wednesday, January 15, 2014 at 12:46pm by Gabe*

**Computer Science**

How do you create a rotation matrix that will represent a rotation of angle theta about a vector (x,y,z)? This is instead of rotating about an axis.
*Saturday, February 16, 2008 at 9:58pm by Mike*

**physics**

the rotation of earth is a period of 86164 seconds. the earth has a radius of 6380 km. how fast would you be moving due to earths rotation at the equator? also how fast would you be moving at a latitude of 27 degrees north of the equator? also calculate the centripetal ...
*Monday, February 24, 2014 at 10:19pm by jake*

**physics**

pulsar is a rapidly rotating neutron star that emits radio pulses with precise synchronization, there being one such pulse for each rotation of the star. The period of rotation is found by measuring the time between pulses. At present, the pulsar in the central region of the ...
*Monday, March 17, 2008 at 3:13pm by shelby*

**grade nine space**

What is the difference between the terms rotation and revolution? I need to use the Earth to support my answer.
*Monday, January 17, 2011 at 4:07pm by peyton*

**Algebra**

This is Algebra. Haha.. You can take algebra between 8th and 11th grade. Something like that.. Not really a grade thing.. Just a subject. Why do you ask?
*Tuesday, March 11, 2014 at 5:41pm by Student*

**Physics**

Angular momentum, which is proportional to the product of the Moment of Inertia and speed of rotation, remains constant. Her rotation rate will decrease by a factor of 3.5 in the straight position. The rate will be (2/1.5)(1/3.5) rot/s
*Tuesday, April 20, 2010 at 10:44pm by drwls*

**cCongruence and transformations?**

m (x,y) --> (-x,y) is what transformation reflection rotation or translation m (x,y) --> (y, -x) is what transformation reflection rotation or translation m (x,y) --> (2x,2y) is what transformation reflection rotation or translation how do you do this what are some ...
*Tuesday, August 27, 2013 at 6:57pm by loli*

**pre-algebra**

the same -- rotation does not change area.
*Thursday, February 23, 2012 at 6:46pm by Steve*

**grade nine space**

Please try some of the following links: http://search.yahoo.com/search?fr=mcafee&p=difference+between+rotation+and+revolution+for+the+Earth Sra
*Monday, January 17, 2011 at 4:07pm by SraJMcGin*

**Chemistry**

Organic chemistry: an attempt at synthesizing a certain optically active compound resulted in a mixture of its enantiomers. The mixture had an observed specific rotation of 11.0 degrees. If it is known that the specific rotation of the R enantiomer is -33.6 degrees, determine ...
*Thursday, November 4, 2010 at 12:40am by Tokey*

**Chemistry**

Suppose a student is measuring the optical rotation of a 1 M sample of (S)-(-)- Limonene. The path length is 13cm. What optical rotation should the student expect to measure?
*Sunday, November 14, 2010 at 2:52am by Sunny*

**Physics**

3 of them commute I and X CNOT and X applied to the target qubit Real rotation by 30∘ and real rotation by 45∘
*Sunday, February 24, 2013 at 8:48pm by Russel*

**Physics**

Your question does not make sense, especially "I think it is true..". Torque is specific to axis of rotation, and perpendicular distance to the axis of rotation. if axis of rotation is a vector, then distance is a vector perpendicular to that axis vector. Torque= force (a ...
*Friday, December 16, 2011 at 11:42am by bobpursley*

**Fourth Grade Geometry**

Rotation a ---- b becomes for example b | | a reflection a -- b becomes b - - a translation a -- b ----> a -- b (moved right)
*Wednesday, January 9, 2008 at 5:02pm by Damon*

**4th grade Science**

translation is moving in a straight line. rotation is moving in a circle about an axis.
*Monday, November 3, 2008 at 9:34pm by bobpursley*

**grade nine space**

revolution is when earth goes around the sun and rotation is when earth rotates on it's axis
*Monday, January 17, 2011 at 4:07pm by saleh*

**7th grade science help the solar system Ms. Sue**

1. Most likely, ____ were formed when lava from the moon's interior flooded bowl-like regions on the moon's surface. (1 point) maria highlands craters basins 2. Depressions on the moon formed by large meteorites are called ____. (1 point) maria mountains craters highlands 3. ...
*Wednesday, October 17, 2012 at 10:49pm by Delilah*

**10th grade**

One rotation would take you 2π(12) inches or 2π(1) feet multiply that by 920
*Tuesday, November 30, 2010 at 2:26am by Reiny*

**math**

After a triangle is rotated 180 degrees, its vertices are at (-4,1),(-1,4), and (-5,-8). What were the coordinates of the vertices before the rotation? I think the answer is (1,-4), (4,-1),(8,-5). In rotation, the coordinates get switched. All I just did was switch the numbers...
*Saturday, December 1, 2007 at 10:49pm by robert*

**Cosmology**

Which of the following statements is not true of spiral arms: they tend to trail the rotation of the galaxy they are sites of star formation they are amplified by resonances between the epicyclic frequencies of stars and the angular frequency of the spiral pattern they arise ...
*Friday, March 1, 2013 at 7:54am by C*

**Linear Momentum in Rotational motion**

It is known that for a mass (m) that moves with velocity (v) the linear momentum is (m)x(v). Now, assume we have a rod of mass (m) and radius (R) that rotates with constant angular velocity (w). Also, isolate only half of the cycle (rotation for 180 degrees). What is the ...
*Sunday, February 11, 2007 at 2:34am by Nikos*

**Geometry - Angle of rotation**

What is the measure of the angle of rotation with respect to two lines that intersect to form a 25° angle? 25 degrees is how much one line is rotated from the other
*Thursday, August 2, 2007 at 7:28pm by John*

**Math (Trig)**

1 rotation = 2pi 1/8 rotation = 1/8 x 2pi = pi/4 State y as the height difference created from the rotation of the wheel and the bottom of the ferris wheel (not the ground) height = y + 1 = r - r cos {(2pi/20)t - (pi/4)} +1 = r(1 - cos pi{(t/10) - (1/4)}) +1 = 10(1 - cos pi{(t...
*Sunday, February 27, 2011 at 9:51am by agrin04*

**ochem lab**

What is the expected observed rotation of a 9.1 x 10-5 M solution of compound X? Note: compound X has a specific rotation of [α]D20 = -49o and a molecular weight of 235.2 g/mol. In addition, the path length of the cell used to take the polarimetry measurement was 5.0 cm.
*Monday, April 2, 2012 at 11:28pm by cn*

**Physics**

A rotating space station has radius 1270 m, measured from the center of rotation to the outer deck where the crew lives. What should the period of rotation be if the crew is to feel that they weigh one-half their Earth weight? I got 101.1 seconds... is this correct? Please help!
*Sunday, June 3, 2012 at 11:06am by Brandi*

**Chemistry**

A pure sample of (R)-limonene has a specific rotation of +125.6. If a sample had a specific rotation of +35.6, how much of each enantiomer is present in the sample? Show your work. I dont even know where to begin....please help :(
*Tuesday, November 8, 2011 at 12:53pm by Adrianna*

**6th grade science**

which soil conservation technique did George Washington Carver urge farmers to use??? 1) crop rotation 2) cover crops 3) contour plowing 4) no-till farming
*Friday, November 11, 2011 at 6:03pm by Kate*

**geometry**

What is the measure of the angle of rotation with respect to two lines that intersect to form a 45° angle? What is the measure of angle of rotation and how do you go about finding it when given an angle? Thanks for explaining
*Sunday, January 17, 2010 at 12:09pm by Sara*

**Physics**

Is the maximum torque that a given force can exert on an object occurs when the force is applied to the axis of rotation. I think it is true because torque is always specific when it comes to the axis of rotation. Am I correct?
*Friday, December 16, 2011 at 11:42am by David*

**Physics**

In an amusement park rocket ride, cars are suspended from L = 4.28-m cables attached to rotating arms at a distance of d = 6.10 m from the axis of rotation. The cables swing out at an angle of θ = 52.0° when the ride is operating. What is the angular speed of rotation?
*Tuesday, December 9, 2008 at 2:08am by Sandhya*

**physics**

In an amusement park ride, cars are suspended from L = 4.22 m cables attached to rotating arms at a distance of D = 6.25 m from the axis of rotation. The cables swing out at an angle of θ = 49° when the ride is operating. What is the angular speed of rotation?
*Saturday, February 18, 2012 at 3:43pm by Jon Tuck*

**physics**

Consider the rotational motion of two compact discs (CD). Disc A undergoes a rotation of 540 degrees in 1.50 secs, and disc B undergoes a rotation of π radians in 3.00 secs.
*Monday, April 7, 2014 at 11:30pm by Anonymous*

**Fourth Grade Geometry**

i learned this in 4th grade too, 2 years ago... i sort of forget it, but ill give it a shot. Rotation is when you rotate something, so its at a different angle, reflection is when the shape or dimension is the reflection of itself,( basically backwards), and translation is the...
*Wednesday, January 9, 2008 at 5:02pm by Ashley*

**Grade 11 math**

I don'tquite understand we never learned y and r stuff. We just started this..the chapter is called Angles of rotation. Andwhere did u get the 10 from... and um sorry for bothering you but can u help me do one because there are many..:( Thanks I greatly appreciate you help!
*Tuesday, December 18, 2012 at 8:28pm by Priya*

**Math--Fast Pleasee!**

Find the coordinate of the image of the point (3,6) rotated with respect to the x-axis and the y-axis. I plotted the points and came up with (3,-6) and (-3,6) The choices for the answer is a)(6,-3) b) (-6,3) c) (-3,-6) d) (0,-6) Was I wrong or what did i do wrong? The point (3...
*Monday, May 7, 2007 at 9:03am by Emily*

**8th grade Science**

An unbalanced force can make an object speed up, slow down, change direction and also change its rate of rotation about its center of mass.
*Thursday, February 19, 2009 at 7:26pm by drwls*

**Algebra(2 of 3)**

The vertices of ABC are A(-3,-4),B(-1,3),C(3,-2). The triangle is rotated 90 degrees counterclockwise. Use the rotation matrix [0 -1][1 0] to find the coordinates of C' A)(-3,2) B)(4,-3) C)(-3,-1) D)(2,3) I chose A [0 -1] x [-3 -1 3][-4 3 -2] =
*Monday, February 18, 2008 at 11:50am by Jon*

**Pre algebra**

Kayla has a 41% grade average. On an exam that is worth 20% of her grade she gets a 100%. What is her grade now?
*Wednesday, May 25, 2011 at 8:07am by Ashley*

**transformation**

your best bet might be to make a sketch on graph paper, and use your intuition. Notice that the x and y values contain the same numbers, except their signs might have switched as well as their positions, (-1,6) became (-6,-1) in general (a,b) becomes (-b,a) after a 90º counter...
*Monday, February 23, 2009 at 5:15pm by Reiny*

**Physics**

(a) (earth's velocity in orbit)x(distance from sun) (b) This requires the moment of inertia about its axis, I. Assume mass is uniformly distributed and use I = (2/5)M*R^2 which applied to solid spheres. The moment of inertia of rotation is I*w where w is the angular velocity ...
*Friday, March 18, 2011 at 6:46pm by drwls*

**organic chemistry**

A sample of 2-butanol has a specific rotation of -9.75 degrees. Determine the % ee (enantiomeric excess) and the molecular composition of this sample. The specific rotation of pure (+)-2-butanol is +13.0 degrees.
*Saturday, November 15, 2008 at 1:04am by Jenn*

**physics**

A boy of mass 23 kg sits on a seesaw 1.5 m from the axis of rotation. At what distance from the axis of rotation must his friend, whose mass is 21 kg, be positioned to balance the seesaw? [6 marks]
*Tuesday, February 28, 2012 at 10:26am by alex*

**Trigonometry**

Find the angular speed in radians per sec. of the second hand on a clock. How long does it take for the second hand to make one rotation? And isn't one rotation 2pi radians? Let me know what you got as an answer.
*Tuesday, July 3, 2007 at 8:05am by James*

**Calculus**

Verify this equation, y = 4^x-1 You need parentheses. Is it, y = 4^(x - 1)? Or, y = 4^(x) - 1? Or ? Are you Jamal? Please don't change screen names. And, which is it? In this problem, rotation is about the x-axis. In the 'Jamal' problem, rotation is about the y-axis.
*Sunday, January 30, 2011 at 1:42pm by helper*

**Math**

Find equations for a pair of lines M and N so R(sub n)compose R(sub m) is the given transformation. A. The translation that maps the origin onto (5,0) B. The rotation of 180o about a point (Xo, Yo) C. The rotation of 40o about the origin D. The translation T with T(x,y) = (x+3...
*Wednesday, June 19, 2013 at 9:59pm by Stace*

**Chemistry**

A sample of 2-methyl-1-butanol has a specific rotation of -3.25°. Pure (R)-2-methyl-1-butanol has a specific rotation of +5.75°. Determine the %ee and molecular composition of the sample.
*Tuesday, March 2, 2010 at 4:45pm by Chad*

**Science 6th grade Earth's day and night ANSWERS**

1. how does earth's rotation cause day and night? (1pt) As the earth rotates toward the east the sun appears to rise in the east and set in the west. 2.Roughly how many times does the earth rotate during each complete revolution? (1pt) 365. 3. Saturn's day is roughly 10 hours ...
*Wednesday, March 12, 2014 at 4:30pm by Queen elsa*

**Math**

A ferris wheel makes one rotation in 15 minutes. Find your car's location and the angle of rotation after: 3 mins., 5 mins., 9 mins., 12 mins. The diameter of the wheel is 328 ft. and the height, with the base, is 369 ft.
*Monday, May 14, 2012 at 9:42pm by Ann*

**physics**

A ferris wheel makes one rotation in 15 minutes. Find your car's location and the angle of rotation after: 3 mins., 5 mins., 9 mins., 12 mins. The diameter of the wheel is 328 ft. and the height, with the base, is 369 ft.
*Tuesday, May 15, 2012 at 3:31pm by Ann*

**Math**

Determine whether a regular decagon has reflection symmetry and/or rotational symmetry. If it has reflection symmetry, state the number of axes of symmetry. If it has rotation symmetry, state the angle of rotation. Explain how you determined your answers
*Thursday, October 25, 2012 at 1:17pm by Mae*

**Physics**

A bike wheel rotates uniformly through 2 revolutions in 3 seconds. a) what is the period of the wheel's rotation? T=3rev/2s=1.5s b) what is the frequency of the wheel's rotation? (in Hertz) f=1/T =1/1.5 =.666Hz c) what is the angular speed of the wheel(provide answer in ...
*Wednesday, October 31, 2007 at 8:23pm by Tammy*

**ece**

Studies of children throwing have revealed that two- and three-year-olds A. throw while stepping forward with the opposite foot. B. throw with body rotation and full arm range. C. are unable to throw a ball of any size. D. throw mainly with their forearms, and little or no ...
*Friday, April 12, 2013 at 12:41am by Anonymous*

**8th grade math**

please help one blade of a fan is parallel to the floor. what degree of rotation of the fan puts the blade at the top of the fan
*Monday, May 21, 2012 at 6:12pm by codey*

**Algebra 1: 8th Grade**

Thats funny...im in 7th grade and im in algebra 1...anyway...why do u need help with this??? its simple exponents and division...
*Tuesday, April 28, 2009 at 12:35am by CC*

**4th grade Science**

My daughter is learning translation and rotation in science right now...what is translation in regards to science?
*Monday, November 3, 2008 at 9:34pm by Katie*

**Math**

Well, it did ask you to draw the graph, and for that you can follow the path shown in the links I gave you. For the period we simply have to know how long it takes for the wheel to make one rotation, that is, how long it takes for the stone to go from ground-level to ground-...
*Saturday, December 11, 2010 at 10:16am by Reiny*

**Honor Physics**

Please provide the units of your physical quantities. Is the radius in meters or feet? Is the revolution time in seconds or minutes? Use the radius and rotation rate to get the horizontal velocity at the top of the rotation. Use the radius and height of the wheel to get time ...
*Tuesday, September 15, 2009 at 1:26am by drwls*

**Math**

That would depend upon the location of the center of rotation, in general. In your case, the polygon happens to be a rectangle. Because of that, if you switch the coordinates of V and T, and separately switch the coordinates of U and W, you will have accomplished a 180 degree ...
*Saturday, March 7, 2009 at 9:46pm by drwls*

**trigonometry**

what direction of rotation generates and angle with a measure of -90 degrees? of 120 degrees? what portion of a complete rotation is -90 degrees? 120 degrees?
*Tuesday, June 23, 2009 at 10:44pm by nika*

**Geometry**

A car tire rotates when you drive. How is this type of rotation different from a rotation in Geometry? What other type of transformation is happening to the car tire? Thanks!
*Tuesday, March 11, 2014 at 4:45pm by Ismary*

**Physics (please help!!)**

The Crab pulsar (m=2.00x10^30 kg) is a neutron star located in the Crab Nebula. The rotation rate of the Crab pulsar is currently about 30.0 rotations per second, or 60.0pi rad/s. The rotation rate of the pulsar, however, is decreasing; each year, the rotation period increases...
*Friday, April 15, 2011 at 3:57pm by Abigail*

**Physics Classical Mechanics**

[h][t][t][p]://[ocw].[mit].[edu]/courses/physics/8-01sc-physics-i-classical-mechanics-fall-2010/rotation-and-translation/two-dimensional-rotation-and-translation-dynamics/MIT8_01SC_coursenotes27.pdf PGS 13-17
*Thursday, November 14, 2013 at 7:05am by Anonymous*

**9th grade algebra **

My goodness, Jean or Natalie -- is it 9th or 10th grade algebra? How are you going to learn if you dump all of your math homework questions on us?
*Thursday, November 12, 2009 at 1:31pm by Ms. Sue*

**Calculus (trig stuff)**

2&pi is one full rotation around the circle, so you can think of 2&pi as being the same as 0. so 7 pi is the same as going around the circle 3 full times with 1&pi left over, to figure this out exactly you can do the following: (7/2) = 3 +1/2 the 3 is how many times we went 2&...
*Sunday, October 25, 2009 at 9:33pm by michael*

**Physics**

a chain pulls tangentially on a 33.4kg uniform cylindrical gear with tension of 70.1 N. the chain is attached along outside radius at 0.794m from the axis of rotation. starting from rest gear takes 1.59 s to reach rotational speed of 1.08 rev/s. what is total frictional torque...
*Tuesday, May 10, 2011 at 10:27am by Jenna*

**calculus**

you must have come across the following: for ax^2 + 2hxy + b^2 + 2gx + 2fy + c = 0 then the xy term can be eliminated by a rotation through an angle of Ø, where tan 2Ø = 2h/(b-a), a ≠ b if a = b, then Ø = 45° since 45 = cos 45 = 1/√2 the rotation matrix would be 1...
*Monday, January 17, 2011 at 1:36pm by Reiny*

**College Algebra**

solve the polynomial inequality and graph on number line. express in set interval rotation. Show work x^3 - 3x^2 - 9x + 27 < 0
*Sunday, November 24, 2013 at 6:55pm by Jenn*

**science**

does jupiter have a clockwise or counterr-clockwise rotation? Both. It depends on the direction you are looking. For instance, looking at the Earth, from the South of Earth, Earth has clockwise rotation. But looking at it from the North, is is counterclockwise.
*Sunday, May 27, 2007 at 2:41pm by carol*

**math**

well it takes the moon to rotate earth 27.3 days.1 rotation = 360 degrees therefore 360/27.3 = 13.19 degrees/day to convert to radians, 1 rotation = 360 degrees= 2 X Pi 2Pi/27.3days = 0.23 rad
*Sunday, November 8, 2009 at 12:56pm by IWantAnIceCreamTruck*

**physics**

A solid cylinder of mass 20 kg rotate about its axis of rotation with angular speed 100m/s. The radius of the cylinder is 0.25m. What is the K.E. associated with the rotation of the cylinder what is the magnitude of the angular momentum of the cylinder about its axis
*Saturday, March 16, 2013 at 10:59pm by shubham mahur*

**6 grade math**

Find 3 uppercase letters that look the same when rotated 180 degrees.Then,what letter's 90,180,270 degree rotations has this outline?This is also the inside lines formed by the rotation of what letter?
*Wednesday, January 6, 2010 at 5:23pm by Victoria*

**Chemistry(Please help)**

Oh ok, the question asks me to find the specific rotation for D-erythrose 4-phosphate which I determined was 50 and then it asks me to find the specific optical rotation for L-erythrose 4-phosphate so I thought that it would be a different formula.
*Sunday, October 28, 2012 at 3:02pm by Hannah*

**Science**

The earth would go in a straight line tangent to it's current rotation of the sun as the sun is no longer pulling it in causing the elliptical in the earths rotation. Without the gravity pulling it in, the earth would simply go flying off into space.
*Sunday, February 26, 2012 at 12:45pm by Carter*

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