An airplane in a wide sweeping "outside" loop can create 0-g inside the aircraft cabin. What must be the radius of curvature of the flight path for an aircraft moving at 180 m/s to create a condition of "weightlessness" inside the aircraft?
a. 1150 m
c. 2300 m
b. 1800 m
d. 3300 m
D
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Two speakers in a stereo emit identical pure tones. As you move around in front of the speakers, you hear the sound alternating between loud and zero. This occurs because of
a. interference b. changing sound level c. diffraction d. the Doppler effect e. shock waves
The maximum mass of a white dwarf is
A) about the mass of our Sun. B) about 1.4 times the mass of our Sun. C) limitless; there is no theoretical limit to the maximum mass of a white dwarf. D) about 3 times the mass of our Sun.
If you are asked to make a very sensitive glass thermometer, which of the following working fluids would you choose?
1.mercury 2.alcohol 3.gasoline 4.glycerin
A car moves from the point (3.0 m)x + (5.0 m)y to the point (8.0 m)x - (7.0 m)y in 2.0 s. What is the direction of the average velocity of the car?
A) 67° from the x-axis B) -67° from the x-axis C) 33° from the x-axis D) -33° from the x-axis E) 52° from the x-axis