What methods does "wobbling stars" refer to?
A: Astrometry & radial velocity
B: Astrometry & microlensing
C: Transit & direct imaging
D: Transit & microlensing
E: None of the above
Answer: A: Astrometry & radial velocity
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Indicate whether the statement is true or false
RMS and Peak Quantities: A 100-W light bulb is powered by 120 V ac 60.0-Hz household connection. Determine the rms current and the current amplitude.
What will be an ideal response?
A car is making a 12-mile trip. It travels the first 6.0 miles at 30 miles per hour and the last 6.0 miles at 60 miles per hour. What is the car's average speed for the entire trip?
A) 20 mph B) 35 mph C) 40 mph D) 45 mph E) 50 mph
The figure shows a ‘snapshot’ of four different waves in identical ropes stretched with the same force
The wave with the greatest speed is __________.