What determines a fluid's resistance to objects moving through it (such as water's resistance to fish moving through water, or air resistance to hailstones)?
a. The fluid's weight.
b. The fluid's volume.
c. The fluid's viscosity.
d. The fluid's mass.
e. The fluid's temperature.
c
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An ice skater performs a pirouette (a fast spin) by pulling in his outstretched arms close to his body. What happens to his moment of inertia about the axis of rotation?
A) It does not change. B) It decreases. C) It increases. D) It changes, but it is impossible to tell which way.
Although Uranus and Neptune have no liquid metallic hydrogen in their interiors, they do have magnetic fields
Indicate whether the statement is true or false
The velocity of an airplane with respect to the ground is m/s at an angle of 30.0 degrees NORTH of EAST. The velocity of the airplane with respect to the air is
m/s at an angle of 60.0 degrees NORTH of EAST. What is the velocity of the air with respect to the ground?
A. 112 m/s at 50.0 degrees NORTH of EAST B. 102 m/s at 17 degrees SOUTH of EAST C. 134 m/s at 49 degrees SOUTH of EAST D. 134 m/s at 17 degrees NORTH of EAST E. 102 m/s at 65 degrees NORTH of EAST
Answer the following statement(s) true (T) or false (F)
1. In a specific non-dispersive medium, a sinusoidal wave’s angular frequency is proportional to its wavenumber 2. In a specific non-dispersive medium, a sinusoidal wave’s period is proportional to its wavelength