Figure Definition and 590 Threads

sound wave questions my tutor couldn't even figure out allright, well, i tried these problems, really thought i knew what i was doing, cause this section has been fairly easy, but i just can't get a couple of them! maybe you guys can help? 1 A stationary motion detector sends sound waves of...

I am having trouble with these two problems, I was wondering if anyone here could help me. 1. Given a sphere of radius 10 inches. Calculate the altitude of the inscribed right circular cylinder of maximum volume. 2. A man 6 feet tall walks away from a light 30 feet high at the rate of 3...

My Professor in my calculus class (1st year) left us with this question at the end of lecture today and told us to think about it. I am baffled as to how to solve it. Anyways, here is what he gave us. \int_{x}^{xy} f(t) dt This is independent of x. If f(2) = 2, compute the value of...

I hope that I construct this problem correctly. I am trying to...um, help a friend fight a speeding ticket. Thanks in advance for any help. The posted speed limit was 25 MPH. The officer was stopped at an intersection as I passed by him on the perpendicular and "estimated" that Iwas traveling...

I don't know how to solve this rigid solid problem Let there be a rod hanging of a string fixed to a certain point. Why is not possible for both the string and the rod to be in the same direction all the time. (it is common sense that it's impossible but how can I prove it?) I've tried to...

A sledge loaded with bricks has a total mass of 18kg and is pulled at a constant speed by the rope.The rope is inclined at 20 degrees above the horizontal, and the sledge moves a distance of 20m on a horizontal surface.The coefficent of kinetic friction between the sledge and surface is .500...

What historical figure does George W. Bush remind you of, and why?

Okay, I have this very EASY question (or so it appears) but I don't know how to figure out the time in this problem: a coin with a diameter of 2.4 cm is dropped on edge onto a horizontal surface. the coin starts out with an initial angular speed of 18 rad/s and rolls in a straight line...

For a charged particle the Velocity Vector is in the i direction and the magnetic field is in the -k direction, prove using Newton's Second Law that the trajectory of this charged particle must be circular. (Hint F=q(V x B) this is the magnetic Force equation.)

Ok ignore the first 2 questions as I've already done em. its just the rest i cannot figure out. If anyone could just shed a little light on this problem it i can finally sleep. Thanks in advanced http://www.tzivonim.com/~mypics/1.gif http://www.tzivonim.com/~mypics/2.gif...

Need help on this problem please! I can't figure it out! The problem is A 54.0 kg. skateboarder starts out with a speed of 1.90 m/s. He does +80.0 J of work on himself by pushing with his feet against the ground. In addition, friction does -265 J of work on him. In both cases, the forces doing...

Simple problems that I can't figure out! HELP! Hello, first of all, thanks in advance for checking out my thread. below are a short list of some simple problems that should be easy to solve for those of you who frequent this forum. However, I can't seem to figure them out and it is really...

simple problems that I can't figure out! HELP! Hello, first of all, thanks in advance for checking out my thread. below are a short list of some simple problems that should be easy to solve for those of you who frequent this forum. However, I can't seem to figure them out and it is really...

How do I figure velocity?! What is the velocity of the mass as it breaks contact with the spring? From part 1 I got: A 1.118 kg block is on a horizontal surface with mu-k = 0.150, and is in contact with a lightweight spring with a spring constant of 715 N/m which is compressed. Upon release...

If you jump from a desk and land stiff-legged on a concrete floor, the chance is good that you will break a leg. To see how this happens, consider the average force stopping your body when you drop from rest from a height of 1.00 m and stop in a much shorter...

I need to tell wether the water level rises, falls, is unchanged, or cat tell. The father and son are in a boat wearing lifejackets. The son pops a helium filled balloon that he is holding by a string. (Id say unchanged since the balloon is floating in the air right) The fisherman fills a...

HELP! pulley problems, can't figure formula out... ok, for physics here at uf, there are 2 problems in this homework i just can't figure out, and I am sure I am just being stupid, but can anyone help me? here they are... In Figure 5-50, three ballot boxes are connected by cords, one of which...

Dr. Ray protects his computer system from those pesky university freshmen by incorporating a secret code that only he knows how to work out. Two numbers appear on his screen, and he can't log in until he types in a third number, related to the first two. However, certain freshman spies...

Tryin to figure out what the equation for this problem! An economy consists of three industries, A, B, and C, each of which produces a single product. The interrelationship between the three industries is Current...

Help me figure this one out! For a certain commodity, the demand equation is given by D= -5p + 5=. At a price of $1, twelve units of the commodity are supplied. If the supply equation is linear and the market price is $4, find the supply equation. Answer: For this one I have come up with...

So, first day of school today, and I'm in honors chemistry. I got a packet with refernce tables etc. and a homework assignment designed just to get you to use the tables and be able to connect one thing they say with another. Anyway, one question is "How much heat is required to melt 1g of ice?"...

A particle moves in the x-y plane with constant acceleration. At time t = 0 s, the position vector for the particle is d = 2.2 m x + 8.2 m y. The acceleration is given by the vector a = 4.5 m/s2 x + 2.2 m/s2 y. The velocity vector at time t = 0 s is v = 3.3 m/s x - 4.3 m/s y. Find the magnitude...

Please bear with my verbosity on this one, and with the messy symbols. The problem states that I am to fire a projectile from some distance d above the ground (ignoring air resistance) with initial velocity v0 and initial angle θ. I am to show that between R (the maximum horizontal...

I have one big headache that is connected to math. So the problem is about internet speed. Let's say it's 256_kbps. My internet provider says that the speed agrees with proportion 4:1 (my_country:abroad). Please help me to figure out my final speed in my country (in kbps) and abroad. There are...

hey I am trying to figure out all the isomers for C9H20...im getting kind of frusterated so if anyone can help me find them or just tell me how thatd be awesome! thanx! :smile:

I know that our current decimal system has a base ten. My question is, how can i figure out fractions to decimals with different bases? basically, i would like to know how to use different bases other than 10.

I'm stuck. The problem is here: http://wps.prenhall.com/esm_wilson_physics_5/0,7194,229574-,00.html Under Physlet problems, #12. Every time I think I find a way to do this, the answer isn't correct. It let's you check the answer, but I can't seem to find a way to go about it. Any help...

Hi all, I've inserted a figure into a document I'm working on, but I can't seem to get the words to wrap around the figure. I have a large white spot on the left side of the page, that's just begging for some text. I've looked in the two guides I have and neither say anything about this can...

As world history is decided by all peoples, wherein it will President George W. Bush eventually stand?

Hi everyone, I am new to these forums and thought this would be a good place to get some help. I picked up a three dollar russian made math problem book at a local book sale. I am working on the questions it has in it and I came across the first problem on motion it has and I can't quite...

hi i was just wondering what is the formula to figure out displacement

Ok, let's say you see a bright light in the night sky. How far away is it? Well, it's bright; so it could either be so bright because: 1) it's so close to Earth 2) it's simply very bright If a star is dim, how do we know if that is because it is far away or if it's simply dim by its...

I want to check my answers for this problem: Part c) below doesn't agree with the book. And even though part a) agrees, I'm not sure about my method. I've attached a figure for reference. For the attached figure, the switch is closed fo t<0, and steady-state conditions are established...

I can't figure out these questions...HELP! 1. A horizontal force of 150N is used to push a 40kg bag a distance of 6.00m on a rough horizontal surface. If the crate moves with constant velocity: a. what is the work done by the force b. what is the coefficient of kinetic friction How do i...

I've been reading some pages on the Internet talking about how to implement rotational dynamics in computer games using Angular Momentum and Linear Momentum, however there's one major thing which really doesn't seem to make sense... Let's say I have a pencil lying horizontally - if I hit it...

there is this scientist in front of a black board. and there is this picture with four e's and a 4 arrows and a squiggly line. i would really appreciate it if some 1 helped me! thank you very much. i tried to draw that picture. it is in this web page . but it is in the "science question"...

How do mathematicians figure out the numerical values of sines and cosines? I can figure out how to evaluate sin(pi/12), sin(pi/24), sin(pi/48), etc, using sin(pi/6) and half angle formulas. How would I find sin(pi/5), for example? Is there any way other than infinite sums to express the...

[SOLVED] A twist on the twin paradox, help me figure this out! Relativity question: A twist on the twin paradox (that again??) Yes, that again. First, it took me a while to accept that the acceleration breaks the symmetry of special relativity and accounts for the difference in aging of...

Hi everybody. I'm taking non-calculus physics at NCSU. There is a tricky homework question that I'm unable to solve. Here it is. My main problem is that I don't know where to start. Any advice would be greatly appreciated. Also, if anybody knows of some web links that explain RC and...

Can anyone figure this out! please help me somebody! 1. The product of the digits in the number 126 is 12:1x2x6=12 a. How many different three digit numbers have a product equal to 12? Explain b.How many three digit numbers have a product equal to 18? Explain c.Compare your answer...