Alirow my pfp got deleted please add me back

Which position represents spring in the southern hemisphere? a) b) c) d)

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

If you add 5.00 ml of 0.100 m sodium hydroxide to 50.0 ml of acetate buffer that is 0.100 m in both acetic acid and sodium acetate, what is the ph of the resulting solution? acetic acid: ka = 1.8. x 10-5