Describe the three sources of internal heat of the terrestrial planets
What will be an ideal response?
Accretion is heat generated by the agglomeration of planetesimals when the planet was formed. Differentiation is heat generated by the energy released as dense objects fall toward the center of a planet during the formation of the core of a planet. Radioactive decay generates heat by releasing nuclear energy when an unstable (radioactive) isotope decays into a more stable element.
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___________ are produced when two galaxies pass near each other and pull large streamers of stars, gas, and dust away from the galaxies
a. Ring galaxies b. Spiral galaxies c. Rotation curves d. Tidal tails e. Irregular galaxies
Motion necessarily involves
a. a change in velocity. b. a change in speed. c. a change in direction. d. a change in position. e. all of these
Assume we can determine the position of a particle within an uncertainty of 0.5 nm. What will be the resulting uncertainty in the particle's momentum (in kg ? m/s)?
a. 1.9 × 10^?25 b. 4.2 × 10^?25 c. 1.1 × 10^?25 d. 1.3 × 10^?24 e. 6.6 × 10^?25
Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.You drop the box. As it falls to its original level, its kinetic energy is __________
Fill in the blank(s) with correct word