An ideal gas is at a temperature of 30
and a pressure of 2.00 atmospheres. What is the number of particles per unit volume of the gas?
a. 
b. 
c. 
d. 
e. 
e.
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Special relativity predicts that the observed mass of a moving particle depends on its ____
a. inertia b. curvature c. velocity d. force e. true position
Carbon-14 has a half-life of 5730 y. A sample of wood has been recovered by an archaeologist. The sample is sent to a laboratory,
where it is determined that the activity of the sample is 0.144 Bq/g. By comparing this activity with the activity of living organic matter, 0.230 Bq/g, the scientist determines how old the wood sample is, or more precisely, when the tree that the sample came from died. How old is the sample of wood? A) 2940 y B) 3870 y C) 2630 y D) 4250 y E) 4590 y
A depth change of 10 metres/33 feet causes a pressure change of.
a. 1 bar/ata b. 2 bar/ata c. 3 bar/ata d. 4 bar/ata
How could the distance measurements based on white dwarf supernovae be independently validated (or invalidated)?
What will be an ideal response?