Astronaut Hans leaves Earth in a spaceship traveling at a speed of 0.280c relative to the observer Brian at rest on Earth
Hans is holding a pencil at an angle of 30° with the direction of travel, as seen by Hans. What angle does the pencil make with the direction of travel, as seen by Brian on Earth?
A) 29°
B) 30°
C) 31°
D) 33°
E) 90°
C
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____ are small dark nebulae about 1 light-year in diameter that contain 10 to 1,000 solar masses
a. HI regions b. HII regions c. Emission nebulae d. Bok globules e. Reflection nebulae
A projectile is projected from the origin with a velocity of 45.0 m/s at an angle of 30.0 degrees above the horizontal. What is the location of the projectile 3.00 seconds later?
A. X = 85.0 m, Y = 37.0 m B. X = 117.0 m, Y = 23.4 m C. X = 37.0 m, Y = 117.0 m D. X = 23.4 m, Y = 37.0 m E. X = 85.0 m, Y = 23.4 m
The direction of the rotation of Venus is exceptional because it is in a(n) ________ direction
Fill in the blank(s) with correct word
In its lowest quantum state, a diatomic quantum mechanical rotator has a rotational energy of
A) zero. B) 2h/?I. C) h/2?I. D) h/?I. E) none of the given answers