An atomic nucleus has a charge of +40e. What is the magnitude of the electric field at a distance of 1.0 m from the nucleus?

A) 5.4 × 10-8 N/C
B) 5.6 × 10-8 N/C
C) 5.8 × 10-8 N/C
D) 6.0 × 10-8 N/C
E) 6.2 × 10-8 N/C


C

Physics & Space Science

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A 4.00 kg hollow sphere of radius 5.00 cm starts from rest and rolls without slipping down a 30.0 degree incline. If the length of the incline is 50.0 cm, then the velocity of the center of mass of the hollow sphere at the bottom of the incline is

A. 1.28
B. 1.44
C. 1.65
D. 1.72
E. 1.98

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The observed spectral lines of a star are all shifted towards the red end of the spectrum. Which statement is true?

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Physics & Space Science