Recent content by sophzilla

I would appreciate any help. Thanks.

Hello - I worked out this problem but I got a wrong answer. First, I used the Pythagorean theorem to find the radial distance between A and each charges. So 1.2m divided by 2 (= 0.6), then the square root of .6 squared + .6 squared = .849, which is the radius. Then I used Coulomb's...

Hello - I'm sorry if this question doesn't really apply here, but the Math & Science Tutorial wasn't very active so I decided to come here instead... What should my calculator mode be in when graphing a hyperbolic WITH trigonometric function? (My function is sinx*coshx - sinhx*cosx). I'm...

Well...the thing is, I did use Kelvin. That was my first choice, but it was wrong. Any other sound possibilities?

I solved the problem, but I can't get the right unit for the answer. A Carnot engine whose low-temperature reservoir is at 16°C has an efficiency of 31%. By how much should the temperature of the high-temperature reservoir be increased to increase the efficiency to 70%? My numerical answer...

"A physical pendulum consists of a meter stick that is pivoted at a small hole drilled through the stick a distance d from the 50 cm mark. The period of oscillation is 5.27 s. Find d." I know that the period for a physical pendulum is T = 2pi * sqrt (I/mgL). I'm really stuck on how to...

All righty... if it's A1V1 = A2V2...do we take into consideration the final height?

A water pipe having a 2.6 cm inside diameter carries water into the basement of a house at a speed of 0.90 m/s and a pressure of 240 kPa. If the pipe tapers to 1.6 cm and rises to the second floor 7.5 m above the input point, what are the (a) speed and (b) water pressure at the second floor...

Never mind! I got it: you just add all the flow rates of three pipes together. This makes sense, although I hate it when they put problems like this...it seems too easy. Thanks for your help.

Okay, I understand what both of you guys said, and you're thinking, "well...if she understands it then why can't she do the problem?" It is because I'm a dumbass. Anyhow, I understand the concept (at least, I think). I'm not asking for a completely solved problem, but can you help me a bit...

Any help would be appreciated - The water flowing through a 1.9 cm (inside diameter) pipe flows out through three 1.3 cm pipes. (a) If the flow rates in the three smaller pipes are 28, 15, and 10 L/min, what is the flow rate in the 1.9 cm pipe? The basic continuity idea is A1v1 = A2v2...

I would appreciate any help on this problem: In Fig. 14-18a, a square of edge length .232m is formed by four spheres of masses m1 = .00372 kg, m2 = .00958 kg, m3 = .00408 kg, and m4 = .00835 kg. In unit-vector notation, what is the net gravitational force from them on a central sphere with...

got it, thanks

For some reason I'm not getting the right answer (I got part B though, for some unknown freaky psychotic reason). I did: E = KE - GMm/R which became: 7.4 × 10E7J = KE - (6.67E-11)(4.4 × 10E23kg)(2.4kg)/4.8 × 10E6m Then got the KE, which was the wrong answer. I'm still thinking I have...

Thanks for the gravitational potential energy equation. Yet I'm still confused about what to use for r: I don't know what the new radius would be. Does the height of the rocket matter? :frown: