The maximum acceleration a pilot can stand without blacking out is about 7.0 g. In an endurance test for a jet plane's pilot, what is the maximum speed he can tolerate if he is spun in a horizontal circle of diameter 85 m?
What will be an ideal response?
54 m/s
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Intermediate between E7 and Sa galaxies, ________ have a disk but no gas or dust
Fill in the blank(s) with correct word
Which of the following makes a meson?
a) a photon and a graviton b) an up quark and an anti-down quark c) three up quarks d) a charm quark and a strange quark e) two down quarks and an anti-up quark
If the velocity of an object is zero at one instant, what is true about the acceleration of that object? (There could be more than one correct choice.)
A) The acceleration could be positive. B) The acceleration could be negative. C) The acceleration could be zero. D) The acceleration must be zero.
According to Planck's hypothesis, the energy of an oscillator is directly proportional to its
a. amplitude. b. wavelength. c. momentum. d. frequency.