2.5 A, 11 V, 2.2 V, 6W, 5.5W, 5.5W
thats wrong, it was 5w 5w... only 10v got past the power lines because their total resistance was 4 ohms.
I found that one tricky, but ended up putting B.
I do too... you increase gap width, you decrease the fringe spacing.
For hydrogen question:
* Hydrogen is in space between Sun and Earth.
* As light passes through them some wavelengths corresponding to difference in energy levels are absorbed.
* Hence the other wavelengths are passed through.
* Note resemblance between emission spectrum of hydrogen and absorption.
Something on the lines of that, I wrote more.. but can't remember.
I said... "We can see from hte hydrogen emission spectra that hydrogen atoms have energy elvels at (the given wavelengths) ... the suns absorption spectra shows gaps in the same wavelength, so we cna safely assume that the photons of that energy are absorbed by the hydrogen on/around the sun.
im pretty sure anywhere between 0.9 - 1.1 will be accepted..
i personally put 1.0
I doubt theyll take .9 or 1.1
you got 1.1 if you used plancks constant, and the question specifically said FROM THE GRAPH... and the graph was pretty bovious that 7.5 lined up with 1.
5. Yes diffraction the gap is in the same order as the debogle wavelength
2. 3.4 m (did you just have to assume sound traveled at 340ms
The diffraction ratios was 2/3, You had to say that there would be some diffraction but not as significant.
It told you at the top that sound was 340.