A proton with mass 1.67 × 10^?27 kg moves in an accelerator with a speed of 0.780c. What is its total energy? (c = 3.00 × 10^8 m/s)
a. 1.50E–10 J
b. 3.90E–10 J
c. 2.40E–10 J
d. 7.51E–19 J
e. 1.28E–18 J
c
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Claudius Ptolemy created an elaborate geometrical and mathematical model to explain details of the observed motions of the planets while assuming:
A) Earth was motionless at the center of the Universe. B) the Sun was at the center of the Universe. C) Earth was part of a galaxy. D) there were many galaxies in the Universe.
The core of the reactor at Three Mile Island
A) never had a significant chance of a meltdown. B) came within a day of a melt-down. C) came within seconds of a melt-down. D) came within an hour of a melt-down. E) melted down.
Sorted spectral data and designed the stellar spectral types
A. Prism or A Diffraction Grating |
B. Annie Jump Cannon |
C. Temperature |
D. Spectroheliometer |
E. Continuous Spectrum |
F. Joseph Van Fraunhofer |
Newton concluded that some force must act on the Moon because ____
a. a force is needed to pull the Moon away from straight-line motion b. a force is needed to pull the Moon outward c. a force is needed to keep the Moon in motion d. the Moon has at a constant velocity e. the Moon has a constant acceleration