Why does a biker have to peddle harder to travel at a constant speed into the
wind on a windy day, compared to travelling on the same road at the same speed
on a calm day.
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If two objects at different te,peraure are in contact with each other what happens to their temperature

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.

If c + di is a point on the circle, then | c + di |=