A circular coil of diameter 20. cm, with 16. turns is in a 0.13 Tesla field
(a) Find the total flux through the coil when the field is perpendicular to the coil plane.
(b) If the coil is rotated in 10. ms so its plane is parallel to the field, find the average induced emf.
(a) 0.065 T-m2
(b) 6.5 volts
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Forces and couples are applied to ABCDE as shown in the figure. All turns of ABCDE are 90o angles. The statically equivalent moment at A (MA) for the force2couple system is (in N?m)
(A) 2160i 1 575j 1 1480k
(B) 160i 1 425j 1 1380k
(C) 2160i 1 325j 1 1380k
(D) 2160i 1 325j 2 1480k
Suppose you electrically charge a comb by running it through your hair. If you then shake this comb back and forth one time every second, you will create
A) an electromagnetic wave having a frequency of 1 Hz and a speed of 300,000 km/s. B) a sound wave having a frequency of 1 Hz and a speed of 300,000 km/s. C) an electromagnetic field that vibrates at a frequency of 1 Hz, but no electromagnetic wave is created. D) the tooth fairy. E) a sound wave having a wavelength of 300,000 km and a speed of 300,000 km/s.
A rubber ball bounces off of a wall with an initial speed v and reverses its direction so its speed is v right after the bounce
As a result of this bounce, which of the following quantities of the ball are conserved? (There could be more than one correct choice.) A) the kinetic energy of the ball B) the momentum of the ball C) both the momentum and the kinetic energy of the ball D) None of the above quantities are conserved.
If the insolation upon a flat plate collector is 800 Btu/ft2/day, how large must the collector be to provide 30,000 Btu/hr of thermal energy for an entire day? Take the efficiency of the collector to be 50%
a. 150 b. 750 c. 1800 d. 4000 e. 7200 ft2