A rock is suspended from a scale reads 20.0 N. A beaker of water (having a density of 1000 kg/m3 ) is raised up so the rock is totally submerged in the water. The scale now reads 12.5 N. What is the density of the rock?
A) 2.50 × 103 kg/m3
B) 3.00 × 103 kg/m3
C) 1.60 × 103 kg/m3
D) 2.67 × 103 kg/m3
E) 2.33 × 103 kg/m3
D
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The ________-type seismic waves can travel through liquids and solids. The ________-type seismic waves can travel through solids only.
A. P; S B. S; S C. S; P D. P; P
A particle that interacts via the strong force is a(n)
a. lepton. b. baryon. c. meson. d. intermediate (or gauge) boson. e. hadron.
The rms speed of a certain sample of carbon dioxide molecules, with a molecular weight of 44 g/mole, is 396 m/s. What is the rms speed of water molecules, with a molecular weight of 18 g/mol, at the same temperature?
A) 253 m/s B) 387 m/s C) 421 m/s D) 506 m/s E) 619 m/s
Hadrons are divided into two subgroups called
A) baryons and leptons. B) leptons and mesons. C) mesons and baryons. D) nucleons and gauge bosons. E) mesons and gauge bosons.