Astronaut Brian leaves Earth in a spaceship at a speed of 0.280c relative to an observer on Earth. Brian is holding a pencil at an angle of 30.0 with the direction of travel, as seen by Brian.
What angle does the pencil make with the direction of travel, as seen in the frame of reference of the observer? A) 29.0
B) 30.0
C) 31.0
D) 32.0
E) 33.0
Question 2
An irreversible engine operating between the temperatures of 550 K and 300 K extracts 1200 J of heat from the hot reservoir and produces 450 J of work. How much entropy is created in the process?
A) 0.32 J/K
B) 0.68 J/K
C) 0.44 J/K
D) 0.73 J/K
E) 0 J/K
Animation of the apparent retrograde motion of Mars in 2003 as seen from Earth
Major moons of Uranus in order of increasing distance (left to right), at their proper relative size
Tides on Earth
Earth’s Spheres
How to solve a distance, time, speed problem using linear algebra
Astronaut Rachel leaves Earth in a spaceship at a speed of 0.960c relative to an observer on ...