A net force exerted on an object opposite to the object's direction of motion decreases it speed and its kinetic energy

Indicate whether the statement is true or false


TRUE

Physics & Space Science

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If the frequency of the AC voltage across an inductor is doubled, the inductive reactance of that inductor

A) decreases to one-half its original value. B) increases to twice its original value. C) decreases to one-fourth its original value. D) increases to 4 times its original value.

Physics & Space Science

When a gun is fired, which has the greater kinetic energy: the bullet or the recoiling gun?

What will be an ideal response?

Physics & Space Science

A thin copper rod that is 1.0 m long and has a mass of 0.050 kg is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod?

A) 1.2 A B) 7.6 A C) 2.5 A D) 4.9 A E) 9.8 A

Physics & Space Science

Which one of the following choices is not one of Kirchoff's rules?

a) junction rule b) emf rule c) loop rule d) slide rule e) resistance rule

Physics & Space Science