What is the distinguishing characteristic of what we call ordinary (or baryonic) matter?
A) It consists of atoms or ions with nuclei made from protons and neutrons.
B) It emits a great deal of light.
C) It can attract other matter through the force of gravity.
D) It is made of subatomic particles that scientists call WIMPs.
A) It consists of atoms or ions with nuclei made from protons and neutrons.
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The mass density of normal air is, at a particular temperature,
If the average molecular mass of air is 29.0 u, how many air molecules are in spherical balloon of radius 15.0 cm?
A. 
B. 
C. 
D. 
E. 
F. 
Saturn's rings
a. have looked basically the same since they formed along with Saturn. b. were created long ago when tidal forces tore apart a large moon. c. are continually supplied with new particles by impacts with small moons.
Exhibit 14-1
A square of side 
is removed from one corner of a square sandwich that has sides of length L. The center of mass of the remainder of the sandwich moves from C to C'.
?
?
Use this exhibit to answer the following question(s).
Refer to . The displacement of the y coordinate of the center of mass (from C to C') is
A.
.B.
.C.
.D.
.E.
.Specific heat capacity of ice = 2,000 J/kg-°C latent heat of fusion of water = 334,000 J/kg specific heat capacity of water = 4,000 J/kg-°C As the ice is melting, the temperature of the ice-water mixture rises by 10°C
a. True b. False Indicate whether the statement is true or false