When a nucleus in an excited state decays to the ground state, a beta particle is emitted
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F
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In a system with two moving objects, when a collision occurs between the objects:
a. the total kinetic energy is always conserved. b. the total momentum is always conserved. c. the total kinetic energy and total momentum are always conserved. d. neither the kinetic energy nor the momentum is conserved.
A spaceship, moving away from the Earth at a speed of 0.9c, shines a green laser backwards at Earth. An observer on Earth would see the light arriving at a speed of
A. c but at a smaller frequency. B. more than c but less than 1.9c. C. 1.9c and with a shorter wavelength. D. c but at a shorter wavelength. E. 0.1c and with an inverted frequency.
A circular loop of radius 0.10 m is rotating in a uniform magnetic field of 0.20 T. Find the magnetic flux through the loop when the plane of the loop and the magnetic field vector are at an angle of 30°
A) zero B) 3.1 × 10-3 T?m2 C) 5.5 × 10-3 T?m2 D) 6.3 × 10-3 T?m2 E) 9.2 × 10-3 T?m2
Solar prominences have twisted and looped shapes because of the solar magnetic field
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