An ant walks down the surface of a ball. If the ant begins to slip when the normal force is less than one-third of the tangential component of the ant's weight, at what angle, measured from the top of the ball, does the ant begin to slip?
A) 70.5°
B) 19.5°
C) 55.0°
D) 18.4°
E) 35.2°
D
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The uncertainty principle was formulated by
A. Einstein. B. Bohr. C. Heisenberg. D. Planck. E. Dirac.
For a forced vibration, the amplitude of vibration is found to depend on the
A) sum of the external frequency and the natural frequency. B) difference of the external frequency and the natural frequency. C) product of the external frequency and the natural frequency. D) ratio of the external frequency and the natural frequency. E) ratio of the natural frequency and the external frequency.
Hydrogen compounds in the solar nebula could condense into ice at temperatures of about 150 K. Suppose they instead could have condensed only at temperatures below 50 K? What would have been different in the solar nebula?
A) The frost line would have been farther from the Sun. B) The frost line would have been closer to the Sun. C) Terrestrial planets would have formed outside the frost line. D) Jovian planets would have formed inside the frost line.
Besides Mars, exobiologists find Europa also a good candidate for life
Indicate whether the statement is true or false