The sun will eventually become a supernova
Indicate whether the statement is true or false
F
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The primary of a transformer
A) has an iron core. B) may or may not have an iron core. C) has more turns of wire than the secondary. D) none of the above
A series LC circuit contains a 100-mH inductor, a 36.0-mF capacitor and a 12-V battery. The angular frequency of the electromagnetic oscillations in the circuit is
A. 36.0 × 10?4 rad/s. B. 6.00 × 10?2 rad/s. C. 2.78 rad/s. D. 16.7 rad/s. E. 277 rad/s.
A 10-kg object is dropped from rest. After falling a distance of 50 m, it has a speed of 26 m/s. What is the change in mechanical energy caused by the dissipative (air) resistive force on the object during this descent?
a. ?1.3 kJ b. ?1.5 kJ c. ?1.8 kJ d. ?2.0 kJ e. ?2.3 kJ
A cubical gaussian surface is bisected by a large sheet of charge, parallel to its top and bottom faces. No other charges are nearby. Over how many of the cube’s faces is the electric field zero?
1.0 2.2 3.4 4.6