Recent content by new324

Im preparing for an Elastic Collision lab today and was wondering is someone would check my prelab questions. A 5 kg object traveling at 4 m/s collides head on with a 10 kg object moving toward it with a speed of 3 m/s. The 10 kg object stops dead after the collision. a) What is the...

Understandable. I'll keep that in mind for all future references. Thank you.

Well I appreciate the input, but as I stated I figured out my problem. But I figured I would go ahead and explain, I should have said SAMPLE survey rather than survey. It is known that 80% of the total population is a success. The question is what the probability is that the random sample survey...

Sorry, I figured it out. It seems I was using the wrong command in my calculator, and looking at the table wrong. Thanks again for letting me know that my assumption was correct, and that I was in fact making a mistake.

Okay, thank you. I don't guess you could help me work out the example I gave so I could see what I am doing wrong could you?

Hello, I was wondering if someone could help me with a question my homework has invoked. In statistics, if a probability is greater than 1 would it just be equal to 1? The problem arose quite a few times when working with Discrete Random Variables. For example, 80% of a 25 person survey...

Here's an alternate way, if its any easier for you. Suspend the hollow nose cone from a chosen point (by attaching a string to any point of the cone) and there will be a vertical line (90 degress relative to the Earth). Remember where this vertical line is. Then choose a different suspension...

Thanks cookiemonster. I appreciate the help.

Allright, I may sound stupid on this one. How much heat (Q) is required to change 456 g of ice at -25(degrees celsius) into water at 25(degrees C). The Specific heat of ice is 2090 J/kg K, the specific heat of water is 4186 J/kg K. The latent heat of fusion of water is 33.5*10^4 J/kg. Is...

Click! Thank You So Much! Your right I do need to learn how to use these tools a little better. And haha no, I can take care of 10Log(100) in my head, providing I would have naturally assumed the whole 10(10Log) thing (haha what a coincidence). Thanks again!

Allright. I understand what your saying but I have a couple questions. First of all isn't 10Log(100) equal to 2 (I think log is naturally set to 10Log in most calculators). When I type 10Log(100) into my ti-83 it gives me 20. But when I type Log[10,100] into Mathematica it gives me 2. I...

I appreciate the advice, but I can't seem to figure it out with that. However, I begin to think that if 10 Log(10)=1 and 10 Log(100)=2 Wouldnt the equation of (I/Io) equal 1 with 108 zeros? (thats +120 because of the given dB and -12 because youd be multipling that by 10^-12)? Then you can...

I have no idea what I'm doing wrong on this one. I'm having problems somewhere in the log conversions to W/m^2 I believe. A siren mounted on the top of towers produces a noise of 120 dB at a distance of 2 meters. Treating the siren as a point particle (and ignoreing reflection and...

Awesome. Thanks a lot Chen and Doc Al. It's a great thing when people compete over helping you first. Haha. :biggrin: Thanks again.

Buoyancy problem, please check my work :) Can you check my work here? A crown is weighed in air and submerged in water. The scale reads 7.84 N in air and 6.86 N in water. find (a) the buoyant force (b) the volume of the crown (c) the density of the crown (d) is the crown made of gold...