The diagram shows a circular wire loop of radius R carrying current I. What is the magnitude of the magnetic field, B, at the center of the loop?
5
Physics & Space Science
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To totally convert a given amount of mechanical energy into heat is
A) possible. B) impossible. C) need more information D) none of the above
Physics & Space Science
The absorption or accretion of smaller galaxies into larger ones is called ________
Fill in the blank(s) with correct word
Physics & Space Science
Which of the following forces is the strongest at near distances?
a. gravitational b. weak nuclear c. strong nuclear d. electromagnetic
Physics & Space Science
One light-year (ly) is about _____
A) 23,000 AU B) 34,000 AU C) 56,000 AU D) 63,000 AU
Physics & Space Science