The emf in a conducting rod of length L moving perpendicular to a magnetic field is directly proportional to the speed of the rod
Indicate whether the statement is true or false
TRUE
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The lowest mass object that can initiate thermonuclear fusion of hydrogen has a mass of about
a. 1 solar masses b. 80 solar masses c. 8 solar masses d. 0.08 solar masses e. 0.001 solar masses
One type of medical imaging process is called positron emission tomography. Radioactive material is injected into a patient; during the radioactive decay the material emits a positron, which then interacts with an atomic electron, emitting gamma rays, which are detected by the imager. This gamma ray emission process is called:
A) pair production B) annihilation C) absorption D) alpha decay E) fission
Two taut strings of identical mass per unit length are stretched with the same tension with their ends fixed, but one string is 0.330 cm longer than the other
Waves on these strings propagate at 34.0 m/s.The fundamental frequency of the shorter string is 258 Hz. What is the beat frequency when each string is vibrating at its fundamental frequency? A) 12.3 Hz B) 9.00 Hz C) 12.0 Hz D) 12.7 Hz E) 11.3 Hz
The source of the sun's energy is
A) chemical reactions. B) gravitational energy. C) granola bars. D) nuclear fusion. E) nuclear fission.