A projectile is projected from the origin with a velocity of 30.0 m/s at an angle of 45.0 degrees above the horizontal. What is the range of the projectile?
A. 91.8 m
B. 105 m
C. 134 m
D. 177 m
E. 205 m
A. 91.8 m
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Satellite Motion: Asteroid Ida was photographed by the Galileo spacecraft in 1993, and the photograph revealed that the asteroid has a small moon, which has been named Dactyl. From the dimensions of Ida and its general features, one can estimate the mass of Ida to be 4.5 × 1016 kg, and the distance between Dactyl and Ida is approximately 90 km. Assuming a circular orbit, what would be the orbital speed of Dactyl? (G = 6.67 × 10-11 N ? m2/kg2)
A. 5.8 m/s B. 11 m/s C. 2.3 m/s D. 2.9 m/s E. 30 m/s
In which of these v versus t graphs is the acceleration changing?
A. (a)
B. (b)
C. (c)
D. (d)
When water vapor changes phase to become water in a cloud, the surroundings become
A) cooler. B) warmer. C) both of these D) neither of these
The making of abundant iron nuclei is typical of:
A) planetary nebula ejection. B) the helium flash. C) all novae. D) type I supernovae. E) type II supernovae.