Contrast the sidereal and solar days
What will be an ideal response?
The Earth rotates once on its axis every 23 hours, 56 minutes, and thus turns to face the same distant star in that interval. But we are also revolving around the Sun at one degree eastward per day, hence the Sun appears to have moved eastward from one day to the next, and it takes a full 24 hours to align with the Sun again.
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Fission is used in
a. atomic bombs b. power plants c. energy for stars d. hydrogen bombs e. a tokamak reactor
According to the kinetic theory of gases, the pressure of a gas is due to:
A. change of kinetic energy of molecules as they strike the wall B. change of momentum of molecules as the strike the wall C. average kinetic energy of the molecules D. force of repulsion between the molecules E. rms speed of the molecules
If a quantity you calculated had units of kg ? m/s, what type of quantity could it be?
A. momentum B. kinetic energy C. work D. impulse E. force
Fluid Flow: Fluid flows at 2.0 m/s through a pipe of diameter 3.0 cm. What is the volume flow rate of the fluid?
A. 1.4 × 10-3 m3/s B. 5.7 × 10-3 m3/s C. 14 m3/s D. 57 m3/s