What do "kiloton" and "megaton" refer to?
a. explosive yields of nuclear weapons
b. kiloton means 1000 tons of TNT
c. megaton means one million tons of TNT
d. all of the above
d
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What is currently included in the study of
geology? a)only investigations involving rocks and minerals b)only data on the structure and composition of Earth c)investigation of the composition, structure, and history of all planets and moons in our solar system d)all studies of matter in any form throughout the entire universe
The metric prefix that means one thousand is
a. milli- b. centi- c. one- d. kilo- e. mega-
A 5.0-kg mass is attached to the ceiling of an elevator by a rope whose mass is negligible. What force does the mass exert on the rope when the elevator has an acceleration of 4.0 m/s2 upward?
a. 69 N downward b. 29 N downward c. 49 N downward d. 20 N downward e. 19 N downward
A long solenoid (1 000 turns/m) carries a current of 25 mA and has an inside radius of 2.0 cm. A long wire which is parallel to and 4.0 cm from the axis of the solenoid carries a current of 6.0 A. What is the magnitude of the magnetic field at a point on the axis of the solenoid?
a. 51 mT b. 61 mT c. 43 mT d. 81 mT e. 1.4 mT