Search: If the linear speed of the disk is 1.35 m/s, find the translational kinetic energy, rotational kinetic energy, and the total kinetic energy of the rolling hoop.

Number of results: 25,691

algebra
I need help. Can someone help me please. Explain how you can determine from the graph of a system of two linear equations in two variables whether it is an inconsistent system of equations. Thank you
Sunday, March 18, 2012 at 11:23pm by don

calculus
4. When the area in square units of an expanding circle is increasing twice as fast as its radius in linear units, the radius is A. 1/4pi B.1/4 C.1/pi D. 1 E.pi
Sunday, February 26, 2012 at 4:13pm by Taeyeon

physics
According to the Law of conservation of linear momentum for the inelastic collision m1v=(m1+m2)u. Then u=m1v/m1+m2=(0.13x40)/0.4=13 m/s
Monday, January 9, 2012 at 12:28pm by Elena

calculus
When the area in square units of an expanding circle is increasing twice as fast as its radius in linear units, the radius is (a) 1/4pi (b) 1/4 (c) 1/pi (d) 1 (e) pi
Monday, December 26, 2011 at 4:03pm by Hank

Stats
The linear correlation coefficient is a numerical value that ranges from -1.00 to +1.00. Describe in a sentence or two the meaning of each of these correlation coefficients: a) -1.00 b) +1.00
Thursday, October 20, 2011 at 11:57am by Jennifer

math(algebra 1)
i dont get these please help me: use the subtitution method to solve the linear system 1)3x+y=0 x-y=4 2)y=-3x-1 x-3y=3 3)3x-y=9 2x+y=6 4)x-2y=0 3x+y=0 Thank you!!:)
Tuesday, January 18, 2011 at 10:53pm by please help!!!

math(algebra 1)
how do u answer this? please step by step *graph and check to solve the linear system y=-x+3 y=x+1 Thank you very very much!!! :)
Monday, January 17, 2011 at 6:52pm by please i need help!!! i dont get it

linear algebra
what is the basis of a subspace or R3 defined by the equation 2x1+3x2+x3=0 I know the basis is vectors <-3,2,0> and <-1,0,2> but how do you get that?
Sunday, May 16, 2010 at 6:02pm by jen

linear algebra
The inverse of a 2x2 can be done as follows: For matrix, A= |a b| |c d| The inverse A-1= |d -b| |-c a| / (ad-bc) For example: If A= |4 5| |6 7| A-1 = |7 -5| |-6 4| / (28-30) = |-3.5 2.5| |3 -2| Check: |4 5| |-3.5 2.5| |6 7| |3 -2| = |1 0| |0 1|
Wednesday, October 7, 2009 at 10:31pm by MathMate

algebra
If it is linear then the general equation for a straight line y=mx+c must apply Take two sets of coordinates and plug these in -5=-2m+c -2=-1m+c solve for m and c m=3 c=1 check using another set of points 7=2x3+1 which is fine so equation is y=3x+1
Monday, June 6, 2011 at 9:48am by Dr Russ

Linear
The equation y= 12x + 5 shows the total cost for ordering tickets on the phone for a certain outdoor concert. Tickets are $12 each, and there is a one-time service fee of $5. Can the slope of this line be thought of as a rate? Can someone "Explain" this problem to me...
Wednesday, June 23, 2010 at 6:20pm by Felicia J

algebra
Assuming that the learning of vocabulary words increases in a linear pattern, (it does not), you have two ordered pairs. (5,20) and (10,40) Just like you would in grade 9 geometry, find the slope, then use y = mx + b to find the equation.
Wednesday, November 18, 2009 at 10:01pm by Reiny

algebra 1 help
I am having a hard time understanding these problems would some one please explain what i need to do the teacher is asking me for points on the graph i am totally confused 1)Graph the inequality. y > –5 2)Solve the following system of linear inequalities by graphing.
Thursday, May 3, 2007 at 9:45am by allen

physics
A 5.30 kg package slides 1.57 m down a long ramp that is inclined at 11.8^\circ below the horizontal. The coefficient of kinetic friction between the package and the ramp is mu_k = 0.320 Calculate the work done on the package by the normal force. If the package has a speed of ...
Sunday, November 27, 2011 at 11:34am by alaa

physics
I already took this course. It is your turn to try the problems. When we see exactly what you are having trouble with perhaps we can help. Remember Torque = rate of change of angular momentum = I alpha omega = w = angular speed angular momentum = I w alpha = dw/dt = rate of ...
Wednesday, January 5, 2011 at 9:35am by Damon

Physics
(1) Pick the times you want to average over. Call them t2 and t1. (2) Measure the distance change, x2 - x1. The average velocity is ((x2 - x1)/(t2 - t1) (3) The average speed is harder. You need to plot the instantaneous speed |x'(t)| and average that I am assuming motion ...
Sunday, February 21, 2010 at 1:45pm by drwls

physics
i need the full solutions of the integrals that lead to these equations: mean speed of molecules in a gas: vavg= sqrt(8RT/PiM) average of the square of speeds: (v^2)avg= 3RT/M fraction of molecules with speed: 4PI*(M/2PiRT)^(3/2)*e^(-Mv^2/RT)(deltav) the general integral given...
Friday, October 30, 2009 at 5:28pm by sz

Physical Science
DISTANCE-TIME for RUNNERS Time(s) 1 2 3 4 Sally's Distance(m) 2 4 6 8 Alonzo's Distance(m) 1 2 2 4 Make a distance-time graph that shows the motion of both runners. What is the average speed of each runner? Which runner stops briefly? Over what time interval do they ...
Thursday, November 3, 2011 at 5:24pm by Ashley

physics
Responding to an alarm, a 100 kg, a fireman slides down a pole to the ground floor, 3.1 m below. The fireman starts at rest and lands with a speed of 3.8 m/s. Find the average force exerted on the fireman by the pole. Find the average force exerted on the fireman when the ...
Wednesday, September 22, 2010 at 10:22pm by anonymous

physics
sorry !! A driver runs to the south at 20 m / s for 3 min, then turns west and runs to 25 m / s for 2 min, and finally turns to the northwest at 30 ni / s for I min. Find in this movement, 6 min, (a) the displacement vector the driver, (b) the speed climb and the average ...
Sunday, August 22, 2010 at 11:23pm by EXCEL

physics
A driver runs to the south at 20 m / s for 3 min, then turns west and runs to 25 m / s for 2 min, and finally turns to the northwest at 30 ni / s for I min. Find in this movement, 6 min, (a) the displacement vector the driver, (b) the speed climb and the average driver (C) the...
Sunday, August 22, 2010 at 11:23pm by EXCEL

Physics
A 855 N crate rests on the floor. a) How much work is required to move it at constant speed 7.7 m along the floor against a friction force of 180 N? b) How much work is required to move it at constant speed 7.7 m vertically? I really NEED help I am very lost with physics!!!!
Thursday, October 15, 2009 at 12:50pm by Jen

Physics help!!
An archer shoots an arrow with a velocity of 45 m/s at an angle of 50 degrees with the horizontal.An assistant standing on the level ground 150m downrange from the launch point throws an apple straight up with the minimum intial speed necessary to meet the path of the arrow. (...
Monday, February 18, 2013 at 12:49am by Sammie

physics
A former amusement park attraction consisted of a huge vertical cylinder rotating rapidly around its axis. The rotation speed should be sufficient for the people found inside to be stuck to the wall when the floor was removed. what should be the minimum speed of rotation for ...
Friday, December 9, 2011 at 12:44pm by Greg

Physics: Help
A coin is placed 12.5 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 36 rpm is reached, at which point the coin slides off. What is the coefficient of ...
Monday, October 9, 2006 at 8:31pm by Haley

Phisic
A driver runs to the south at 20 m / s for 3 min, then turns west and runs to 25 m / s for 2 min, and finally turns to the northwest at 30 ni / s for I min. Find in this movement, 6 min, (a) the displacement vector the driver, (b) the speed climb and the average driver (C) the...
Monday, August 23, 2010 at 12:21pm by EXCEL

algebra
a long distance runer started running a course, running at an average speed of 2 mph. 1.33 hrs later, a cyclist travelde the same course at an average speed of 4 mph. how many hrs after the runner started did the cyclist overtake the runner? round answer to the nearest tenth.
Saturday, February 2, 2008 at 2:49am by tina

physics
A person standing at the top of a hemispherical rock of radius R = 5.00 m kicks a ball (initially at rest on the top of the rock) to give it horizontal velocity vi. (a) What must be its minimum initial speed if the ball is never to hit the rock after it is kicked? (b) With ...
Wednesday, February 16, 2011 at 1:46pm by Anonymous

1
High-speed stroboscopic photographs show that the head of a golf club of mass 200 g is traveling at 55.0 m/s just before it strikes a 46.0-g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 40.0 m/s. Find the speed of the golf ...
Saturday, November 13, 2010 at 6:17pm by moh

Physics
You swing a 5.9 kg bucket of water in a vertical circle of radius 0.3 m. (a) What speed must the bucket have if it is to complete the circle without spilling any water? (b) How does your answer depend on the mass of the bucket? a) I don't understand how the velocity can be...
Sunday, February 14, 2010 at 10:06pm by Bob C

speed-distance-time
Please help me with this problem. Two cars started from the same point and traveled on a straight course in opposite directions for exactly 2 hours, at which time they were 208 miles apart. If one car traveled, on average, 8 miles per hour faster than the other car, what was ...
Monday, January 14, 2008 at 6:14pm by jen

science
An attack helicopter is equipped with a 20- mm cannon that fires 61.6 g shells in the forward direction with a muzzle speed of 585 m/s. The fully loaded helicopter has a mass of 4890 kg. A burst of 208 shells is fired in a 2.32 s interval. What is the resulting average force ...
Tuesday, May 14, 2013 at 1:21pm by Anonymous

Physics
A car is being driven along a country road on a dark and rainy night at a speed of 20 m/s. The section of road is horizontal and straight. The driver sees that a tree has fallen and covered the road ahead. Panicking, the driver locks the breaks at a distance of 20m from the ...
Sunday, November 6, 2011 at 5:24pm by Anne

physics
a ball is projected horizontally from the edge of a table that is 0.433m high, and it strikes the floor at a point 1.84m from the base of the table. the acceleration of gravity is 9.8m/s^2.what is the initial speed of the ball? how high is the ball above the floor when its ...
Friday, May 20, 2011 at 11:10pm by rista

Physics
Can someone explain to me how I'd draw this problem and what the resultant vector should be as well as the placements of the angles if possible? A pilot must fly his plane to a town which is 200km from his starting point in a direction 30degrees N of E. He must make the ...
Sunday, March 2, 2008 at 12:14pm by Anonymous

algebra 1
y=5^x is exponential (the power is a variable) y=x^2 is a polynomial (variable raised to integer power) y=2x-3 is a linear function y=1/x is a rational function (quotient of two polynomials)
Thursday, March 21, 2013 at 8:22pm by Steve

geometry
volume ratio = 216/27, and is the cube of the linear scale factor. So, each side of the larger is 6/3 = 2 times the smaller. So, the area of the larger is 2^2 = 4 times the smaller.
Monday, October 22, 2012 at 11:08am by Steve

Maths (Linear Equation)
Buy n books at $6. The total cost is 6n + 6.5(9-n) = 56 6n + 58.5 - 6.5n .5n = 2.5 n = 5 5 at $6 + 4 at $6.50 = 30 + 26 = $56
Monday, October 17, 2011 at 2:17pm by Steve

Algebra
If there's a linear relationship, F = mC + n 50 = 10m + n 86 = 30m + n 36 = 20m m = 9/5 n = 32 F = 9/5 C + 32 or C = 5/9(F-32) C(24) = 5/9(24-32) = -40/9 = -4.44
Sunday, October 9, 2011 at 9:39pm by Steve

calculus
find linear approximations for each of the following and put a bound on the error of the estimate. 1. (7.985)^1/3 using f(x)=x^1/3 and a=8 2. (.9997)^100 using f(x)=x^100 and a=1 please help explain please too
Thursday, December 9, 2010 at 4:43pm by C

LINEAR ALGEBRA
How to prove or disprove (a)if A has a zeronentryonthe diagonal then A is not invertible (b)if Ais not invertible then for every matrix B, AB is not invertible (c)if A is a nonzero 2X2 matrix such that A^2+A=0, then A is invertible
Sunday, October 24, 2010 at 10:11pm by LEON

statistics
True or False: A zero population correlation coefficient between a pair of random variable means that there is no linear relationship between the random variable.
Monday, February 8, 2010 at 8:07pm by iyra

Math help please
Do the data in the table represent a linear function? If so, write a rule for the function. x: –3 –2 –1 0 1 y: 1 –2 –5 –8 –11 yes; y = –3x – 8 yes; y = 1/3x – 8 yes; y = 1/3x + 8 yes; y = 3x + 8
Friday, May 3, 2013 at 6:45pm by Delilah

algebra
The equation of any straight line, called a linear equation, can be written as: y = m x + b where : m is the slope of the line and b is the y-intercept In this case: m = - 8 / 11 y-intercept = - 5
Monday, November 7, 2011 at 2:15am by Bosnian

math
Since area is 2-dimensional, doubling each linear dimension scales the area by 22 = 4 It changes the volume by 23 = 8
Friday, October 28, 2011 at 10:50am by Steve

math
the measure of angle 1 is five less than four times the measure of angle 2. if angle 1 and angle 2 form a linear pair, what are their measures?
Sunday, August 28, 2011 at 9:51pm by Sarah

Math
Sometimes when you're graphing a linear equation, you get that u-shaped line called a parabola. And sometimes you get a v-shaped line,and I forgot what you call that..
Thursday, March 26, 2009 at 6:40pm by Angie

physics
A car of mass 1500 kg traveling at 15.6 m/s loses its brakes and collides with the rear end of the car in front of it, which has a mass of 1020 kg and is traveling in the same direction at 12.5 m/s. If the smaller car is given a speed of 15.3 m/s by the collision, what is the...
Thursday, April 18, 2013 at 10:00pm by YOLO

Physics
Rapids in rivers occur when the river narrows. Consider a simple river where the cross-section can be modeled as a rectangle 60 m wide and 2 m deep. If the speed of the river water at this point is 1 m/s, what would be the speed of the water in m/s at a point further down ...
Wednesday, February 20, 2013 at 1:53am by John

Physics
A long jumper takes of at an angle of 20 degrees and a speed of 11.0 m/sec. The max height achieved is 0.722 meters an the max length is 7.94 meters. At what angle and speed would the jumper have to take off to get the same max length, but twice the max height?
Friday, August 31, 2012 at 11:24pm by Kim

Physics
A bucket of mass M = 5.47 kg is attached to a second bucket of mass m = 3:52 kg by an ideal string. The string is hung over an ideal pulley as shown in the gure. Mass M is started with an initial downward speed of 2.13 m/s. What then is the speed (m/s) of mass M after it has ...
Tuesday, December 13, 2011 at 7:33pm by Sarah

physics
I disagree. The speed of a point on the outer edge of the lorry wheel is 47.52 km/hr angular velocity = 400 * 2 pi radians/60 seconds speed = angular velocity * R so (400* 2/60) pi R = (47.52*10^3/3600)meters/second
Sunday, November 27, 2011 at 3:05am by Damon

science
a car manufacture advertise that a car goes "from zero to sixty in 8 seconds" is a description of: a) average speed b) instantaneous speed c) average velocity d) instantaneous acceleration a) and b) are incorrect since it's a change in velocity, whcih means it&#...
Thursday, September 6, 2007 at 5:19pm by Tammy

physics
horizontal speed of fighter and parcel = 200 cos 30 forever = 173 m/s initial vertical speed of parcel = 200 sin 30 up = 100 m/s v = 100 - g t h = 2400 + 100 t - 4.9 t^2 h = 0 at ground so 4.9 t^2 - 100 t - 2400 = 0 solve quadratic for t then x = 173 t
Saturday, September 29, 2012 at 6:36pm by Damon

college algebra
Doreen's speed = X mi/h Doreen's time = Y hrs(d = 56mi). Eq1: X*Y = 56. Y = 56/X Sue's speed = (X+15) mi/h. Sue's time = (Y-4) hrs(d = 132mi). Eq2: (X+15)(Y-4) = 132. In Eq2, substitute 56/X for Y: (X+15)(56/X-4) = 132 56-4x+840/x-60 = 132 -4x+840/x-4 = 132 ...
Sunday, September 16, 2012 at 4:11pm by Henry

physics
An elevator without a ceiling is ascending with a constant speed of 10m/s. A boy on the elevator shoots a ball directly upward, from a height of 2.0m above the elevator floor, just as the elevator floor is 28m above the ground. The initial speed of the ball with respect to the...
Sunday, August 24, 2008 at 6:51pm by alk

physics
In the sport of skeleton a participant jumps onto a sled (known as a skeleton) and proceeds to slide down an icy track, belly down and head first. In the 2010 Winter Olympics, the track had sixteen turns and dropped 126 m in elevation from top to bottom. (a) In the absence of ...
Monday, April 15, 2013 at 3:05pm by Anonymous

Physics
A bullet of mass 0.02kg is fired at a speed of 500m/s towards a fixed wooden block of thickness 10cm. The bullet penetrates the block and emerges with a speed of 200m/s. a) Find the average retarding force on the bullet when it is passing through the block. b) Estimate the ...
Sunday, December 5, 2010 at 7:01am by laura

Physics
It is well known that bullets and other missiles fired at Superman simply bounce off his chest. Suppose that a gangster sprays Superman's chest with 8 g bullets at the rate of 110 bullets/min, the speed of each bullet being 550 m/s. Suppose too that the bullets rebound ...
Wednesday, December 5, 2012 at 2:12pm by Evan

physics
It is well known that bullets and other missiles fired at Superman simply bounce off his chest. Suppose that a gangster sprays Superman's chest with 8 g bullets at the rate of 105 bullets/min, the speed of each bullet being 450 m/s. Suppose too that the bullets rebound ...
Monday, May 16, 2011 at 4:46pm by sam

physics
A digital audio compact disc carries data along a continuous spiral track from the inner circumference of the disc to the outside edge. Each bit occupies 0.60 mm of the track. A CD player turns the disc to carry the track counter-clockwise above a lens at a constant speed of 1...
Monday, November 5, 2012 at 4:38pm by Anonymous

physics
a tennis player swings her 1000g racket with a speed of 6.00 m/s. she hits a 60g tennis ball that was approaching her at a speed of 18.0 m/s . the ball rebounds at 43.0 m/s. a)how fast is her racket moving immediately after the impact? you can ignor the interaction of the ...
Monday, November 29, 2010 at 6:09pm by Anonymous

physics
change in momentum = force* time final speed = 800 final momentum = 26.2 * 800 = 20960 average speed = 400 time in barrel = 6/400 so 20960 = F (6/400) F = 1.4*10^6 Newtons
Sunday, January 6, 2013 at 7:14pm by Damon

physics
Speed of light in the medium is v =c/n, where c is the speed of light in free space, n is the index of refraction. n (glass) ≈ 1.5, n(water) ≈ 1.33, n(air) ≈ 1. v(air) > v(water) >v(glass). Answer: C
Sunday, April 29, 2012 at 9:37am by Elena

physics
what is speed? it's m/s wavelength is in m. frequency is in 1/s so, speed = wavelength * frequency = 160*2.2 m/s Think about it. If each wave extends 2.2m, and there are 160 of them every second, than that means the wave travels at 2.2*160 meters every second.
Friday, January 6, 2012 at 1:47pm by Steve

Math
Light travels at a speed of about 186,000 miles per second. Sound travels at a speed of about 1,087 feet per second. How many times faster light travels than sound.
Wednesday, November 3, 2010 at 3:19pm by Rose

tangential speed and accelerations
A helicoptor bladehas an angular speed of 6.50 rev/s and has an angular acceleration of 1.30 rev/s. point 1 on the blade is 3.00m and point 2 is 6.7m. Can you find the speeds of A) the tangential speeds and B) the tangential accelerations?
Tuesday, October 12, 2010 at 2:39pm by J

physics....properties of matter....ASAP.pls
Helium gas occupies a volume of 0.04m^3 at a pressure of 2*10^5 N/m^2 and a temperature of 300K,calculate: 1.) the mass of helium 2.)the root mean square speed of its molecule 3.)the root mean square speed at 432K when the gas is heated at constant pressure to this temperature
Friday, November 16, 2012 at 4:29am by adewuyi

Algebra 1
A boat towing a water skier leaves a dock and travels east at a speed of 20mph. Two minutes later, a second boat towing another skier leaves the dock in the same direction at a speed of 25mph. How long will it take the second boat to overtake the first boat? PLEASE help!? /:
Thursday, January 12, 2012 at 3:32pm by Kiersten Hailey

Physics
An 18-year-old runner can complete a 10.0-km course with an average speed of 4.48 m/s. A 50-year-old runner can cover the same distance with an average speed of 4.18 m/s. How much later should the younger runner start in order to finish the course at the same time as the older...
Tuesday, October 5, 2010 at 9:16pm by Bala

Algebra--Help needed!
A molecule is traveling at a speed of 400 meters per second. What is its speed in miles per hour? Given: 30 centimeters = 1 foot, 3600 seconds = 1 hour. 400 m/s * (100 cm/1m)(1 ft/30 cm)(1 mi/5280 ft)(3600 s/1h)
Tuesday, November 4, 2008 at 5:17pm by Damon

science
what is the kinetic energy, in J, of a)an Ar atom moving w/ a speed of 650m/s b)a mole of Ar atoms moving w/ a speed of 650m/s? a) K.E. = (1/2) M V^2 For M, use the mass of an Argon atom. It equals 0.040 kg (40 g) divided by Avogadro's number. M must be in kg to get the K....
Monday, January 8, 2007 at 1:18am by michelle

Physics
n=c/v where n =the index of refraction c =the speed of light in vacuum v =the speed of light in a medium find n http://physics.info/refraction/
Thursday, February 24, 2011 at 12:57am by TutorCat

physic
A 0.34 kg particle has a speed of 2.0 m/s at point A and kinetic energy of 7.5 J at point B. (a) What is its kinetic energy at A? _____ J (b) What is its speed at point B? _____ m/s (c) What is the total work done on the particle as it moves from A to B? _____ J thank you so much
Tuesday, October 20, 2009 at 4:16am by Chan

Calculus-Solved-Please Check?
estimate cube root of 25 by linear approximation f(x+delta(x))= f(x) + (df(x)/x) * deltax 3 + 1/3x^(-2/3) * -2 3 - 2/3x^(-2/3) 3 - (2/3* ((cube root(9))) is this right? thanks
Tuesday, April 23, 2013 at 3:55pm by Liliana

physics
A +5.7 C and a -3.5 C charge are placed 25 cm apart. Where can a third charge be placed so that it experiences no net force? (Restrict your analysis to a linear one.)
Sunday, May 27, 2012 at 5:58pm by myra

algebra
2/13 is the linear scaling needed for m to correspond to s. The other side is also scaled by 2/13, so the area is scaled by 4/169. 4/169 * 166 = 3.93 ft^2
Sunday, October 9, 2011 at 10:20pm by Steve

PHysics
a = (Vf - Vo) / t, a = (130 - 0) / 30 = 4.33m/s^2, Linear. C = 3.14*D = 3.14 * 2*6 = 37.68m/rev. a = 4.33m/s^2 * (6.28/37.68)rad/m, a = 0.722rad/s^2.
Wednesday, April 6, 2011 at 4:23pm by Henry

physics
What is the cube root of 64? You won't need decimals. It is an integer. The ratio of corresponding linear dimensions of similarly shaped volumes is the cube root of the volume ratio.
Saturday, December 11, 2010 at 4:03pm by drwls

rotations
a = angular acceleration I = rotational inertia w = angular velocity v = linear velocity Torque = RxFT = Ia so, a = RxFT/I = (R/I)(4t-0.10t^2) w = integral(a) with respect to t v= wR
Wednesday, March 10, 2010 at 8:34pm by FredR

Math
Use linear approximation, i.e. the tangent line, to approximate 1.6^3 as follows: Let f(x) = x ^3. The equation of the tangent line to f(x) at x = 2 can be written as y=12x-16 Using this, we find our approximation for 1.6 ^3 is ???????
Saturday, November 7, 2009 at 4:37pm by Salman

algebra
We need to know if the question is 3+(1/7)x +5x=453/7 which is a linear equation, or 3+1/(7x) +5x=453/7 which is a quadratic equation. Parentheses are necessary when you transcribe fractions to a single line.
Monday, September 28, 2009 at 10:12pm by MathMate

precalc
equations one is a point. Equation 3 has no solution. Equation 2 is not in x at all. So what does Linear equation mean? Most agree it is a polynomial equation of degree one. Are any of the above polynomials?
Monday, September 14, 2009 at 5:17pm by bobpursley

math (patterns)
One pattern that I see is the number of letters in the toy name. The pattern is not absolutely linear. But regardless, the more expensive the toy the longer the name.
Wednesday, December 10, 2008 at 3:45pm by economyst

Physics(Please help)
Some bacteria are propelled by motors that spin hair-like flagella. A typical bacterial motor turning at a constant angular velocity has a radius of 1.9x10-8m, and a tangential speed at the rim of 2.7x10-5 m/s. (a) What is the angular speed (the magnitude of the angular ...
Saturday, June 9, 2012 at 4:24pm by Hannah

Physics/Math
After flying for 15 min in a wind blowing 42 km/h at an angle of 30° south of east, an airplane pilot is over a town that is 50 km due north of the starting point. What is the speed of the airplane relative to the air? This is a vector equation. I would do it graphically. ...
Saturday, February 3, 2007 at 7:57pm by winterWX

Physics
A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 20 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 165 m), the block swings toward the outside of the ...
Saturday, October 6, 2012 at 11:22pm by Moises

Physics
A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 20.0 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 83.9 m), the block swings toward the outside of ...
Saturday, October 6, 2012 at 11:07pm by Thien

physics
A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 27 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 180 m), the block swings toward the outside of the ...
Saturday, March 5, 2011 at 5:55pm by Julius

Physics
A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 27 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 180 m), the block swings toward the outside of the ...
Saturday, March 5, 2011 at 11:54am by Julius

physics
An antelope is at a distance of 20.0 m from a converging lens of focal length 32.0 cm. The lens forms an image of the animal. If the antelope runs towards the lens at a speed of 5.50 m/s, what is the speed with which the image moves? 1/q= 1/32cm-1/2000cm q=32.5203252 dq/dt=-(...
Tuesday, November 16, 2010 at 9:47pm by flame

Physics
A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 32 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 140 m), the block swings toward the outside of the ...
Saturday, October 23, 2010 at 10:55pm by madeline

physics
A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 32 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 140 m), the block swings toward the outside of the ...
Saturday, October 23, 2010 at 5:15pm by Fred

physics
A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 26 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 135 m), the block swings toward the outside of the ...
Wednesday, October 6, 2010 at 1:01am by ZAC

math- precalculus
I've attempted this problem a few times but I can't get the right answer. Can someone show me how I can do it? A ship leaves the port of Miami with a bearing of 100 degrees and a speed of 15 knots. After 1 hour, the ship turns 90 degrees toward the south. a) what is ...
Saturday, March 21, 2009 at 5:19pm by jared

physics
Topic: Relative Velocity Question: The escalator that leads down into a subway station has a length of 30.0 m and a speed of 1.8 m/s relative to the ground. A student is coming out of the station by running in the wrong direction on this escalator. The local record time for ...
Sunday, February 1, 2009 at 12:42pm by John

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