Recent content by sp3sp2sp

I got this phone and it came with this film mask thing that i think your supposed to apply to the screen, then peel it off, which is supposed to removed some film (?) But the phone already has a little tab on top of the covering that's already attached (it says A5L so you know what I am...

Homework Statement I am just a little confused about how the question is worded. It asks: Which of the following solutions would have the highest pH? Assume that they are all 0.10 M in acid at 25 C. The acid is followed by its Ka value. the bolded is what I don't understand. I don't know what...

Sorry I don't know what you mean about what the axis would be. All I know is that pointer moved about 3mm when the rod expanded. The pointer is about 30cm and the arm is about 4cm. I also get that the arm moves through some angle as the pointer rises. Thanks for any more help. I have some mental...

thanks, the 4cm is the length of arm from point of contact with expanding rod to the bottom part of right side of pointer arm. I unfortunately don't have access to the apparatus anymore so I can't remeasure.

OK so to know arc length I have to have the radius and do I know that because I know the length of the arm that moves through the angle?

I don't know what a rigid piece which pivots around a point is called but are you saying that the arc length is = to the amount that pointer moves? thanks

Homework Statement Its a general question asking which method of measuring resistance (a 5 ohm resistor in a simple circuit) has greatest precision. The first method I varied voltage from about 5V to 10V, then measured the current each time, then averaged that current and calculated resistance...

the same amount approx?

haruspex are you still available for this? I still don't see what angle it will rotate through. I am still confused please help

Sorry I am not seeing which angle I should be considering. Am I right in saying that as Δx increases the angle decreases right? So hypotenuse is the 30cm pointer? thanks

If the rod expands by Δx then the whole unit rotates by Δx? I know that height of pointer tip increases but would it be by Δx?

Thanks for answering haruspex , I appreciate it. Where exactly is the pivot? It is the arm that pivots, The arm is touching the end of the right end of steel so that that when the rod expands it pushes the arm to the right which then raises the pointer arm vertically alongside the ruler. What...

Homework Statement Im hoping that this experimental setup is common enough in 1st year physics that someone could at least point me in right direction because I may be misunderstanding how the arm and pointer connect together. I need to come up with an equation that relates how far the metal...

Yup that's exactly what it was .. its not a formula, just way I was remembering it because it was confusing me. thanks for the help

i got 7.28*10^11m after using mass of just the one astronaut. thanks for any more help.