From your local latitude, what is the declination of a star that appears on the southern horizon (0° altitude)?
The answer depends on the latitude as perceived by the observer. The star will be 90°
south of the observer's position. Example: If the observer is at 40°N, the declination
of the star will be 90° south of 40°N. The answer is 50°S.
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Heat is added to an ideal gas at 20.°C. If the internal energy of the gas increases by a factor of three during this process, what is the final temperature?
What will be an ideal response?
Sharon cycles up a hill at 15 km/h. When she reaches the top, she immediately turns around and comes down the same road at 30 km/h, stopping where she'd started. Is her average speed greater than, less than, or equal to 22.5 km/h? Explain
What will be an ideal response?
A flat circular loop of radius 0.10 m is rotating in a uniform magnetic field of 0.20 T
Find the magnetic flux through the loop when the plane of the loop and the magnetic field vector are parallel. A) 3.1 × 10-3 T ? m2 B) 0 T ? m2 C) 5.5 × 10-3 T ? m2 D) 6.3 × 10-3 T ? m2
Suppose the room in which you are sitting was magically transported off the Earth, and sent accelerating through the universe at 9.8 m/s2. Assuming your doors and windows are sealed and closed, how could you tell that you'd left the Earth?
A) You couldn't; the equivalence principle tells us that you won't be able to tell the difference. B) You would weigh more than you do on Earth. C) Your time would run slower than it does on Earth. D) You'd hear a loud whooshing sound as you careened through space.