Recent content by Strawberry

Homework Statement A closed, rigid tank contains 2kg of water initially at 80 degrees C and a quality of .6. Heat transfer occurs until the tank contains only saturated vapor at a higher pressure. Kinetic and potential energy effects are negligible. For the water as the system, determine...

Homework Statement A bullet of mass 1 oz moving at a velocity 1000 ft/sec strikes and becomes embedded in a vertical pendulum rod of negligible mass 10 inches from the top of the rod where the rod is fixed, but allowed to move in the direction of the bullet. The rod is 20 inches in total...

I'm having trouble figuring out where to start with the attached problem. I don't know how to approach a circuit with a gap, and I don't know where or if it loops. Any general help would be appreciated, like "use the mesh current method" or explaining where the starting point is.

These two methods seem like they can be applied to the same situations, and I don't really know when I should apply one over the other. I've only just learned the methods so I'm not very familiar with either though. I'd appreciate any help from general guidelines to specific examples.

I guess the symbol just didn't show up in the .pdf. Thanks again alphysicist, you've cleared up a ton of things for me in the past few weeks.

Homework Statement Q18. A 20 F capacitor is charged to 200 V. Its stored energy is: C. 0.4 J Homework Equations q = CV u = .5CV^2 The Attempt at a Solution I tried plugging in the numbers and got 1.6E6, which isn't even close to the answer. I really don't know where to go with...

Homework Statement Q17. Capacitors C1 and C2 are connected in series and a potential difference is applied to the combination. If the capacitor that is equivalent to the combination has the same potential difference, then the charge on the equivalent capacitor is the same as: A. the charge...

V = 4/3 pi r^3, so it would take 8 spheres coming together to make the radius twice as large? I thought r referred to some reference point and not the radius of a sphere. I can't even find a formula in my book for electric potential of a sphere. I'm sorry, but could you explain the concept...

Homework Statement Q15. Eight identical spherical raindrops are each at a potential V, relative to the potential far away. They coalesce to make one spherical raindrop whose potential is: A. V/8 B. V/2 C. 2V D. 4V E. 8V Homework Equations V = sum( Vi ) The Attempt at a...

Oh, I think I figured it out. V' is 0 at x = 1.1, from there I can find the rest of the coefficients

Homework Statement There is a uniform, horizontal beam 4.8m in length supported by a pin at x = 0 and a roller at x= 3.2m. There is a distributed weight of 12kN/m from x = 0 to x = 1.6m. There is a concentrated, vertical force of 2.4kN in the downward direction at x = 4.8. Find the...

err nvm, I figured it out. I was seriously staring at this thing for two hours and then finally figure it out after I post it ><

Homework Statement Q5. A solenoid is 3.0 cm long and has a radius of 0.50 cm. It is wrapped with 500 turns of wire carrying a current of 2.0 A. T Homework Equations Magnetic field of an ideal solenoid = permeability constant (1.257E-6) * current * number of turns The Attempt at a...

Well I have everything divided by 4, should it be divided by 16? Is this more clear? F = k* (q^2 / a^2)/4 * [ sqrt(2) - 4 ] * i + [ sqrt(2)-4) ] * j ]

Thank you very much for your response alphysicist. I took your advice and I think I have the right answer. The equivalent charge system is like a square with opposite corners having the same charge, I think. (-q) - - - q | | | q - - - -(-q) Taking V to be the sum of V...