Modern science attempts to seek explanations for phenomena that are based on
A) new subjective laws that are yet to be confirmed experimentally
B) intuitive expectations
C) the views of leading scientists
D) the known laws of nature
D
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A singly charged 9Be ion is accelerated from rest through a potential difference of 8000 V. The ion is then sent into a mass spectrometer where the radius of the path is 29 cm. What is the magnetic field in the spectrometer?
A. 0.27 T B. 0.13 T C. 0.067 T D. 0.0028 T E. 0.00019 T
In interactions taking place by the strong force, which of the following quantities are conserved?
a. electric charge b. baryon number c. mass-energy d. strangeness e. linear momentum f. angular momentum (spin)
A uniform solid disk of radius 1.60 m and mass 2.30 kg rolls without slipping to the bottom of an inclined plane. If the angular velocity of the disk is at the bottom, what is the height of the inclined plane?
A) 5.61 m B) 4.21 m C) 4.94 m D) 6.73 m
Interference colors in a soap bubble is evidence that the soap film
A) has two reflecting surfaces. B) is thin. C) both of these D) neither of these