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.
C
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Legend says that Archimedes, in determining whether or not the king's crown was made of pure gold, measured its volume by the water displacement method. If the density of gold is 19.3 g/cm3, and the crown's mass is 600 g, what volume would be necessary to prove that it is pure gold?
a. 3.1E+1 cm3 b. 3.2E–2 cm3 c. 3.2E+1 cm3 d. 3.0E+1 cm3 e. 1.2E+4 cm3
The masses of stars are found by measurements of
A) light intensity. B) temperature. C) Doppler shifting. D) binaries. E) relative sizes.
If you push twice as hard against a stationary brick wall, the amount of work you do
A) quadruples. B) doubles. C) is cut in half. D) remains constant but non-zero. E) remains constant at zero.
The particle that orbits the central core inside an atom is the electron
Indicate whether the statement is true or false