The ________ is the spherical outgassing as a comet nucleus is heated by the Sun. The process by which small debris condenses into planetesimals is ________.
Fill in the blank(s) with the appropriate word(s).
Answer: coma, accretion
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Fluid Flow: Ideal incompressible fluid flows through a 4.0-cm-diameter pipe at 1.0 m/s. There is a 2.0 cm diameter constriction in the line. What is the speed of the fluid in this constriction?
A. 0.25 m/s B. 0.50 m/s C. 2.0 m/s D. 4.0 m/s
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Instructions: On occasion, the notation 
will be a shorthand notation for 
.
Exhibit 3-1
The three forces shown act on a particle.
Use this exhibit to answer the following question(s).
Refer to Exhibit 3-1. What is the direction of the resultant of these three forces?
A. 35°
B. 45°
C. 65°
D. 55°
E. 85°
An object's distance traveled as a function of time is shown in the graph. The graph shows
A. an object turning in a circle. B. an object with increasing speed. C. an object moving forward. D. an object experiencing an acceleration.
An electron (m = 9.11 × 10^?31 kg) has a speed of 0.50 c. Determine the difference between its relativistic kinetic energy and the kinetic energy calculated without considering relativity
a. 3.0 × 10^?15 J b. 2.0 × 10^?15 J c. 1.5 × 10^?15 J d. 2.4 × 10^?15 J e. 1.8 × 10^?15 J