Recent content by fromthepast

A sample of sulfur hexafluoride gas occupies a volume of 5.10 L at 198 C. Assuming that the pressure remains constant, what temperature (in C) is needed to reduce the volume to 2.50 L? I used PV/nRT = PV/nRT and got -42 C. Do I have to convert to Kevlin first and then back to Celsius?

1/f = 1/s + 1/s' m = h'/h = -s'/s Does it have something to do with the focal point?

Homework Statement I did an experiment with a convex lens, object, and image. As the lens moved farther and farther away from the object, the image decreased its distance (to remain in focus) from the object as well up to a certain point. After that point, as the lens increased its distance...

-48cm?

virtual

Anybody?

Homework Statement A lens forms an image of an object. The object is 16 cm from the lens. The image is 12 cm from the lens on the same side as the object. (a) What is the focal length of the lens? Is the lens converging or diverging? (b) If the object is 8.5 mm tall, how tall is the image...

What I meant to say was: "I know that for concave MIRRORS, the focal length is one half the length of the radius of the circle. Is this also true for convex MIRRORS?"

Hi tiny-tim! :) Thanks ;)

If there is total internal reflection, does the angle of incidence always equal the angle of reflection? Thanks

I know that for concave lenses, the focal length is one half the length of the radius of the circle. Is this also true for convex lenses? Thanks

Does total internal reflection occur if the refraction of light is passing from air into water? Thanks

For the equation, angular frequency =(2)(pi)(resonance frequency)= 1/square root (LC), can this also be used when a circuit is not at resonance frequency? Thanks

so the polarity of the peak is relative to the polarity of the magnet (north down vs. south down) and the way the coil wraps around the solenoid? i.e., a crest could be a trough and a trough could be a crest, in that it all depends on the experiment?

"At every instant in time they have equal and opposite values. What other value could they sum to?" That was perspicaciously helpful. Thanks