You throw a baseball horizontally, and Jill catches it. Neglect air resistance. The energy transformation that occurs during the catch is
A) kinetic E ? thermal E.
B) thermal E ? kinetic E.
C) kinetic E ? chemical E.
D) chemical E ? kinetic E.
E) chemical E ? gravitational E.
A
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A 33 mH inductor has a current going through it that is increasing at a rate of 2.3 A/s. What is the magnitude of the induced emf in this coil?
A. 33 mV B. 76 mV C. 13 mV D. 95 mV E. 2.5 V
Capacitors of values 6.0 mF and 9.0 mF are connected in series. What is the capacitance of the combination?
A. 15 mF B. 7.5 mF C. 3.0 mF D. 3.6 mF E. 54 mF
If we can solve the orbital motion of an eclipsing binary, we can find
a. the mass of each star. b. the diameter of each star. c. the distance to the binary. d. all of the other choices. e. the mass of each star and the diameter of each star.
What is the relationship between a star's mass and its lifetime?
What will be an ideal response?