At noon on June 21, the Sun is directly overhead at a latitude of
a. 23.5°N.
b. 23.5°S.
c. 32.5°N.
d. 0°.
a
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The Sun is crossing your meridian right now. When will it cross the meridian next?
A) very close to 23 hours, 56 minutes from now B) very close to 24 hours from now C) one year from now D) It depends on the phase of the Moon.
In science, conceptual representations of observed phenomena are referred to as
A) facts B) hypotheses C) models D) beliefs
A tuning fork of frequency 200 hertz can resonate if an incident sound wave has a frequency of
A) 100 hertz. B) 200 hertz. C) both of these D) neither of these
A wheel rotating about a fixed axis with a constant angular acceleration of 2.0 rad/s2 starts from rest at t = 0 . The wheel has a diameter of 20 cm. What is the magnitude of the total linear acceleration of a point on the outer edge of the wheel at t = 0.60 s?
a. 0.25 m/s2 b. 0.50 m/s2 c. 0.14 m/s2 d. 0.34 m/s2 e. 0.20 m/s2