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