Figure Definition and 590 Threads

i am having trouble with this question" if you clap your hands the echo from a distant wall 0.20s later, how far away is the wall?" how do you do this without the speed given to substitute into the speed= distance/time equation?

well i had a test today and one of the questions was this. :A particle particle mass of 25g rolls up and inclined palne of 20 degree with a Velocity intial of 3.0m/s, there is a frictional force of .4 and at point x2 the velocity is 1.0m/s What is the acceleration due to friction? I...

Here is the problem: "A passenger in a convertible throws a ball up into the air. The car is going 35.0 m/s. The upward velocity of the ball is 8.00 m/s. Give the equations which specify the ball position at any given time with respect to the passenger (prime values) and respect to an observer...

Can't figure out this seperable diffEQ! :( Hello everyone 'ive been trying to figure out this easy looking Differential Equation and yet its wrong! weee! Here is the problem: http://cwcsrv11.cwc.psu.edu/webwork2_files/tmp/equations/58/6217226076d5fd259f53ad1e3ed4071.png has an implicit...

I have this trig identity problem i need to solve cos2x=cosx I have to find all the values of x, and i know the answer is x=0°+120°, but i can figure ou how. I've tried it over and over and my answer turns out to x=0°=180°. Please help, thank you.:rolleyes:

I maintain a blog where I write about physics for a general audience, and I wanted to let everyone know about my latest entry, which is on the physics of figure skating. With the Opening Ceremonies of the Winter Olympics only a week away, I thought it might be fun to collect links related to...

An object is thrown vertically upward such that it has a speed of 21 m/s when it reaches two thirds of its maximum height above the launch point. Determine this maximum height. I can't figure what to do since initial velocity isn't given and I don't see a way to solve for it.

for r = 2:.1:10 h=(500/(pi*r^2))-(2*r); %Height for given r assuming max volume of 500m^3 a=2*pi*r*h; %Surface area for cylindrical part b=2*pi*r^2; %Surface area for hemispherical top t=a*300+b*400; %Total cost using values of surface area...

Hi, I have a question regarding significant figure. One rule when multiplying measured quantity is that the final answer needs to use the least number of significant digits provided in the question. Now.. if v = 17 m /s and t= 0.8 s. What is d? d = v * t d = 17 m / s * 0.8 s d = 13.6...

Hello everyone I'm stuck, i got right to the end of this intial value problem and it doens't seem to want to work. Solve the separable differential equation for u {du}/{dt} = e^{3 u + 10 t}. Use the following initial condition: u(0) = 6. u = ? I might have screwed up here: du =...

Hey, I was trying doing some calculations and ran across a question I just can’t figure out. Hopefully I explain this well. I am trying to find the Z component of velocity of an object on earth’s surface after a given time. For example a rock lies on the ground with a tangential velocity of...

let's say a 180 lbs person needs to move a 2000 lbs object 50 feet. that would take 100,000 ft/lbs. how do you apply that in terms of how much effort it would take from a 180lbs man? divide by 180 and get 555.5? how do you determine the amount of force required to get this object rolling? this...

mszwt~HsjFs0xysysoFo4MCF4GInp~oE4sBnwMDEnCB0fBr0DCI0hoBytH~Duszw4wH0jwHsjF Can anyone figure out this encryption?

Please help. I am desperateA string with both ends held fixed in vibrating in its third harmonic. The waves have a speed of 186m/s and a frequency of 250Hz. the amplitude of the standing wave at an antinode is 0.450cm. A. Calculate the amplitude at point on the string a distance of 15.0 cm...

Ok I need me some super help. I have a term paper due next monday and things have just been piling on me like there's no tomorrow so I am barely getting a topic as we speak :cry: :cry: :cry: . So I need some suggestions here. I need an important figure to do a report on that was famous or...

I'm a HS senior, and have never covered differential equations outside a CalculusII curriculum. :frown: This is not homework, rather only a part (just one part!) of an interesting problem I posed myself (for myself) one day: How would I solve for y(x) from :shy:: \frac{{dy}}{{dy}} =...

Im doing a practice test for a asmaytic(not sure how its spelled) and i have the answer but am just unsure of how i was supposed to figure it out. Alright, here's the problem. if "f" is a quadriatic function with f(0)=0, f(1)=2, and f(2)=3, then f(3)=? a.4 b.3 c.13/4 E.4 the answer is...

A friend of mine asked me this short teaser and I can't seem to figure it out: At opposite ends are my mouth and my head I run for miles without leaving my bed My friend says to think outside the box on this one.

Hello everyone, i have no idea why i can't grasp this simple concept... i have: A = 1 4 9 0 1 9 0 0 1 I have to find A^-1, A inverse. So I found the determinant along row 3, 1*det(B) = 1; B = 1 4 0 1 det(B) = (1)(1) - (4)(0) = 1; so i take 1/det * A now wouldn't that just...

figure this one out? why does saturns moon iaeptus have a big wall that bisects it(while it looks like a big ying/yang)? just curious how that is even geologically possible at all?

how do you figure out horizontal force necessary to move an object if the coefficient of kinetic friction is zero?

An angle is given to one significant figure as 7 degrees, meaning that's its value is between 6.5 degrees and 7.5 degrees. Find the corresponding range of possible values of the cosine of the angle. Is this a case in which there are more significant figures in the result than in the input data...

Can someone show me how to figure out the mass of 1ml. of protons? I have been out of school for 20yrs. and have no clue as to how to do this.[

Measurements show that a honeybee in active flight can acquire an electrostatic charge as great as 93.0 pC. Q1 is How many electrons must be transferred to produce this charge? my proposed ans using the formula f=k e after rearranging equation e= 93pC * ./8.99 *10^9 = ?(the ans) but i do...

as shown: in the picture, look at figure d) (attachment) don't worry about figure a) --- given: 720 gm rock each string has a tension of 29 N the rock is held by two of the 45 cm strings with ends 56 cm apart and whirled in a circle between them. Neglect gravity. What is the...

WASHINGTON (Reuters) - Robert Earl, who destroyed national security documents during the 1980s Iran-Contra scandal, is working as chief of staff to acting Deputy Defense Secretary Gordon England, the Pentagon said on Monday. Earl destroyed and stole national security documents while working...

Hello All I have this question that I have to find the exact value of sin 5Pi/12. How do I figure out what this is in degrees? Or how do I break this down so I can use addition or subtraction foumulas? Thanks

I've been working on this problem for near three days now, with two other people. We cannot completely figure it out :devil: (a) In an office, at various times during the day, the boss gives the secretary a letter to type, each time putting the letter on top of the pile in the...

That L shaped thing reminded me of a puzzle. How do you draw a line that bisects an L-shaped plane figure? In this case, bisect means cut into two pieces of the same area.

I am "scared" (to put it mildly) of these problems, which I need to review before my final tomorrow. Just to let all of you know, this is not homework. There are 25 or so problems, and I only understand around 10 of them. :frown: Help me! I need an A on the final to get a B in the class. :cry...

2,5,8,11,13,15,30,34,40,46,52,56,60,63 This was a popular one when I was younger, but I haven't heard it lately. What comes next in the sequence? This is way a trick question. Only a small percentage of people have even a chance of figuring it out.

My art teacher gave an assignment to us to find 2 examples of some of Jackson Pollock's Figure Drawing, ie art with reconizable human forms in it be it painting, drawing, what have you. Most Jackson Pollock is Know for his abstract stuff, making it very hard for me to find anything that even...

I've been trying to figure out this number pattern in the image below...Can anyone help please? My head is spinning :smile: Thanks :)

a 1 L container with 5 mL of water held at 20degcel I have to figure out the vapour pressure. I was told to use PV=nRT..but how do I find n? thanks

Who do you believe to be the most unappreciated person in recorded history, or history overall?

I feel silly for ask you for help on this simple center of mass problem but i got wrong answers... Where is the center of mass of a uniform, L-shaped iron rod of sides X = 0.8 m and Y = 0.5 m, respectively? Take the corner to be at (x,y) = (0,0), with the X and Y sides along those axes...

1) A ball is thrown from a tall building at some angle with respect to the horizontal. By measuring the height of the building and the distance that the ball lands from the base of the buiding, one can uniquely determine the speed of the ball when it hits the ground. I put this down as false...

Hi everyone- I'm trying to figure out this puzzle that has to with numbers inside a 20x20 square. After 1000 cycles, the square will always contain a 10x10 square in the upper left hand corner of all 0's, which will not change. My job is to find out what is happening to all the numbers...

i'm learning about oscilloscopes, and i don't understand why this Lissajous figure can be go from a straight line to a circle. Also, this sweep time/div control setting, i dont understand why the wave cycles vary with this control setting.

Need Help -- Ampere's Law http://www.webassign.net/pse/p30-21alt.gif Figure P30.23 is a cross-sectional view of a coaxial cable. The center conductor is surrounded by a rubber layer, which is surrounded by an outer conductor, which is surrounded by another rubber layer. In a particular...

My teacher takes off points for significant figure mistakes, but advises us to keep a few extra significant figures until the end. How would I do this problem: Compute the velocity of the Sun around the Milky Way. Assume a circular orbit. Use the values given by Croswell for distance from...

Explain why a point on the rim of a tire has an acceleration when the tire is on a car that is moving at a constant linear velocity :cry: :smile: :mad: :rolleyes: :approve:

1) the given function is defined for x>0 except for x=2. Find the value to be assigned to f(2), if any, to guarantee that f is continuous at 2. f( x ) = sin(pi x) / (x-2) cant figure out how to change the equation so i can plug 2 in, i think I am loking right past it, tried multiplying...

i'm stuck trying to figure out this probabilities problem for my thermodynamics class. the question is: consider an idealized drunk, restricted to walk in one dimension (eg. back and forward only). the drunk takes a step every second, and each pace is the same length. let us observe the drunk...

An 1800 kg car passes over a hump in a road that follows the arc of a circle of radius 42 m. a. What force does the road exert on the car as the car passes the highest point of the hump if the car travels at 16 m/s? b. What is the maximum speed the car can have as it passes this highest...

I am trying to figure out some properties of density of a set, but I keep confusing myself. I know the definition of dense is: A set E of real numbers is said to be dense if every interval (a, b) contains a point of E. Could I rephrase the definition so that every interval (a, b) contains...

Help me figure this out please! To make a long story short... I have a court case where I'm being sued for loaning a 4 wheeler to a friend which struck someone standing in the road. The plaintiff's lawyer said that the plaintiff was thrown 30 feet (which I know isn't right). I'm not the best...

Can you figure this out!? Suppose that a cart is being moved by a certain net force. If the net force is doubled, by how much does the acceleration change? Why does this happen? For what reason?

If f(x)=x^(2)-2x-8 then what is the y-intercept of y=-f(x)+2? I don't know how to figure this out. I have the answer but don't know how to get it.

Gyro Rotor Question. Can't figure it out! Need help tonight if possible! I am taking a dynamics class which is reallly difficult. I've been able to solve all of the problems but this one. Can anyone help me by tonight? A rotor mounted in bearings spins about a horizontal axis as shown...