A 100-W light bulb is powered by 120 V ac 60.0-Hz household connection. Determine the rms current and the current amplitude
What will be an ideal response?
0.833 A rms, 1.18 A amplitude
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If the Sun ceased to generate nuclear fusion in its core, the Sun would immediately begin to collapse inward
a. True b. False Indicate whether the statement is true or false
Cosmic rays penetrate your body when
A) safely in your home. B) outdoors. C) in mountainous regions. D) all of the above E) none of the above
A drawback to mining sulfides is the risk of _______________.
a. underground fires c. “rock bursts” b. tunnel collapse d. acid mine runoff
You push horizontally on a 120-N box that is initially resting on a horizontal table. The coefficient of static friction between the box and the table is 0.75,
and the coefficient of kinetic friction is 0.40. Find the friction force on the box if the push is equal to (a) 84 N; (b) 94 N.