In 21,200 years from now, Thuban will once again be our north celestial pole

a. True
b. False
Indicate whether the statement is true or false


True
RATIONALE: See precession.

Physics & Space Science

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Two identical cars are traveling around the same curve on a highway. One of them is moving at 60 mph, and the other is moving at 30 mph. The centripetal force acting on the car moving at 60 mph is __________ the value of the centripetal force acting on the car moving at 30 mph

a. one quarter b. one half c. the same as d. twice e. four times

Physics & Space Science

State the two fundamental postulates of Einstein's Special Relativity

What will be an ideal response?

Physics & Space Science

The magnetic field at a distance of 2 cm from a current carrying wire is 4 ?T. What is the magnetic field at a distance of 1 cm from the wire?

A) 2 ?T B) 4 ?T C) 6 ?T D) 8 ?T E) 10 ?T

Physics & Space Science

The half-life of a radioactive substance is affected by

A) pressure. B) temperature. C) age. D) all of the above E) none of the above

Physics & Space Science