How many arcminutes are in 1°?
A) 60
B) 360
C) 3600
D) 100
E) 10,000
A) 60
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Tritium has a half-life of 12.3 years. How many years will elapse when the radioactivity of a tritium sample diminishes to 30% of its original value?
a. 29 years c. 86 years b. 21 years d. 57 years
When initially discovered by Voyager 2, Neptune's rings appeared as ring arcs, and are more clumpy and less regular than most other rings
Indicate whether the statement is true or false
A 4.20-g bullet embeds itself in a 20.0-kg block, which is attached to a horizontal spring with a force constant of 980 N/m
The maximum compression of the spring is 2.40 cm. What is the speed of the bullet just before it hits the block? A) 800 m/s B) 700 m/s C) 672 m/s D) 900 m/s E) 952 m/s
Length Contraction: When an object moves close to the speed of light relative to Earth, what happens to its dimensions compared to what they were before it began moving, as measured by an Earth-based observer?
A. Only lengths parallel to the direction of travel are decreased. B. Only lengths perpendicular to the direction of travel are decreased. C. All lengths are decreased. D. No lengths are affected.