Celestial longitude is called
a. declination.
b. the parsec value.
c. the zenith angle.
d. right ascension.
d
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Which of the effects listed below is not a major effect influencing the binding energy of the nucleus in the liquid-drop model?
a. The volume effect: the binding energy per nucleon is approximately constant when A > 50. b. The surface effect: nucleons in the surface have fewer neighbors. c. The quantum number effect: all nucleons in the nucleus have the same set of quantum numbers. d. The Coulomb repulsion effect: protons repel protons. e. The symmetry effect: stable nuclei tend to have N ? Z.
Which of the following observations is consistent with the hypothesis that all life on Earth has a common ancestor?
A) different organisms use the same set of amino acids B) different organisms use different sets of amino acids C) all proteins are made of amino acids D) some organisms don't use amino acids at all
Find the final equilibrium temperature when 20.0 g of milk at 10.0°C is added to 160 g of coffee at 90.0°C. (Assume the specific heats of coffee and milk are the same as water and neglect the heat capacity of the container, and cwater = 1.00 cal/g•°C = 4186 J/kg•°C)
a. 85.3°C c. 71.4°C b. 81.1°C d. 66.7°C
Rotational Kinetic Energy: A solid uniform disk is rolling without slipping along a horizontal surface with a speed of 4.5 m/s when it starts up a ramp that makes an angle of 25° with the horizontal. What is the speed of the disk after it has rolled 3.0 m up as measured along the surface of the ramp?
A. 4.0 m/s B. 1.9 m/s C. 2.1 m/s D. 6.8 m/s E. 8.0 m/s