A long straight wire (diameter = 2.0 mm) carries a current of 30 A. What is the magnitude of the magnetic field 2.5 mm from the axis of the wire?

a. 3.2 mT
b. 2.8 mT
c. 2.4 mT
d. 3.6 mT
e. 3.0 mT


c

Physics & Space Science

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The highest mountain of our Solar System exists on Earth.

Answer the following statement true (T) or false (F)

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The nucleus makes up about what percentage of the mass of an atom?

a. 99.9% b. 50% c. 90% d. 5%

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A 5.0-kg object is suspended by a string from the ceiling of an elevator that is accelerating downward at a rate of 2.6 m/s2 . What is the tension in the string?

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