The deviation from the way a compass needle points from the true north direction is the magnetic declination
Indicate whether the statement is true or false
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The oldest rocks on our crust are radioactively dated at about:
A) 200 million years old. B) one billion years old. C) 2.7 billion years old. D) four billion years old. E) 4.6 billion years old.
Newly formed neutron stars have weak magnetic fields which strengthen over time, due to the conservation of angular momentum
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You have exactly 4 resistors: one 3 ?, one 4 ?, one 5 ?, and one 6 ?. How can you combine these to make a 2 ? resistor? (The symbol ? stands for "ohm.")
A. Connect the 3 ? resistor in series with the 5 ? resistor B. Connect the 3 ? resistor in parallel with the 6 ? resistor C. Connect all four resistors in parallel with each other D. Connect the 3 ? resistor in parallel with the 4 ? resistor E. You can't make a 2 ? resistor from the choices listed
What is meant by an entrance region?
What will be an ideal response?