The radio source ________ is located in a place consistent with the center of our Galaxy
A) Cygnus X-1
B) 3C 273
C) 47 Tucanae
D) M-8, the Lagoon Nebula
E) Sgr A?
E
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Velocity Addition: A spaceship approaching an asteroid at a speed of 0.60c launches a scout rocket with speed 0.40c relative to the spaceship. At what speed is the scout rocket approaching the asteroid?
A. 0.81c B. 1.0c C. 0.76c D. 0.64c E. 0.96c
The amount of diffraction a telescope creates depends upon:
A) whether the telescope is a refractor or a reflector. B) the wavelength and the diameter of the telescope objective. C) the magnification of the eyepiece. D) the types of glass used in the achromat. E) the transparency of the atmosphere.
An object moving at 30 m/s has an acceleration of -2.0 m/s/hr. Its speed
A. decreases very quickly. B. decreases very slowly. C. increases very slowly. D. increases very quickly.
A car is moving with a velocity (3.0 m/s)x + (1.0 m/s)y and 3.0 seconds later its velocity is (6.0 m/s)x - (3.0 m/s)y. What is the direction of the average acceleration of the car?
A) 67° from the x-axis B) -67° from the x-axis C) 53° from the x-axis D) -53° from the x-axis E) 60° from the x-axis