Biomagnetism has been detected in
A) bacteria.
B) pigeons.
C) wasps.
D) humans.
E) all of the above
Answer: C
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Astronauts inside Earth satellites such as the space shuttle are usually said to be "in orbit" around Earth. Are you "in orbit" around anything?
A) Yes, around both Earth and the sun. B) Yes, around the sun due to Earth's motion through space [but not around Earth]. C) Yes, around Earth due to Earth's spinning motion [but not around the sun]. D) No. E) Only on Saturdays.
In order for a force to do no work on an object
A. All forces must do work. B. The object is stationary, or the force is perpendicular to the motion C. The force is perpendicular to the direction of motion D. The object is stationary
Most meteorites are
A) carbon-rich and primitive. B) rocky and primitive. C) carbon-rich and processed. D) rocky and processed. E) iron-rich and processed.
An optic fiber is made of clear plastic with an index of refraction of 1.50. For what range of angles of incidence ? with the lateral surface of the fiber will light remain inside the plastic "guide" if it is surrounded by air?
A) 21.1° < ? < 90° B) 23.4° < ? < 90° C) 38.3° < ? < 90° D) 40.3° < ? < 90° E) 41.8° < ? < 90°