Two ice skaters suddenly push off against one another starting from a stationary position. The 45-kg skater acquires a speed of 0.375 m/s relative to the ice. What speed does the 60-kg skater acquire relative to the ice?
A) 0.50 m/s
B) 0.28 m/s
C) 0.38 m/s
D) 0.75 m/s
E) 0.00 m/s
B
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The observed distribution of matter in the Universe is best understood as being caused by ____
a. clumping of dark matter in the early Universe causing clumping of normal matter b. clumping of normal matter in the early Universe causing clumping of dark matter c. simultaneous clumping of normal and dark matter d. large variations in the intensity of the cosmic microwave background e. homogenous expansion of normal and dark matter
Photography Optics: A 35-mm single lens reflex (SLR) digital camera is using a lens of focal length 35.0 mm to photograph a person who is 1.80 m tall and located 3.60 m from the lens.(a) How far is the CCD sensor from the lens when the person is in focus?(b) How tall is the person's image on the CCD sensor?
What will be an ideal response?
Discuss the characteristics of the Universe as observed from Earth
What will be an ideal response?
The following statements are all true. Which one counts as an "exception to the rule" in being unusual for our solar system?
A) Venus does not have a moon. B) Jupiter has a very small axis tilt. C) Saturn has no solid surface. D) The diameter of Earth's Moon is about 1/4 that of Earth.