When a mechanic uses an extension arm on his wrench to loosen a stubborn nut, he is exerting additional torque because of an increase in the ________ (two words) of the force.
Fill in the blank(s) with the appropriate word(s).
lever arm
Physics & Space Science
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The ____________________ of a radioactive substance is the amount of time for the substance to be reduced by half
Fill in the blank(s) with correct word
Physics & Space Science
Type Ia supernovas involve a ________.
A. black hole B. planetary nebula C. neutron star D. white dwarf
Physics & Space Science
A chair is placed on a rug. Then a book is placed on the chair. The floor exerts a normal force
A. on all three. B. only on the book. C. only on the rug. D. upwards on the rug and downwards on the chair. E. only on the objects you have defined to be part of the system.
Physics & Space Science
______________ is the major moon of Neptune
a. Triton b. Titan c. Ganymede d. Europa e. Callisto
Physics & Space Science