A rectangular loop (area = 0.15 m2) turns in a uniform magnetic field with B = 0.20 T. At an instant when the angle between the magnetic field and the normal to the plane of the loop is (p/2) rad and increasing at the rate of 0.60 rad/s, what is the magnitude of the emf induced in the loop?
a. 24 mV
b. zero
c. 18 mV
d. 20 mV
e. 6.0 mV
C
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Spiral galaxies usually contain:
A) M stars. B) white dwarf stars. C) young stars. D) red giant stars.
Structure 1 with member BC of length L/2 has force P1 applied at joint C. Structure 2 with member BC of length L has force P2 applied at C. Both structures have constant flexural rigidity EI. The required ratio of the applied forces P1/P2 so that joint B reactions RB1 and RB2 are equal is approximately:
(A) 1
(B) 5/4
(C) 3/2
(D) 2
Which star spends the longest time in the protostellar phase of life?
A) a 1-solar-mass star B) a 2-solar-mass star C) a 3-solar-mass star D) a 4-solar-mass star E) a 5-solar-mass star
A 4.00-kg block slides down a frictionless inclined plane with an acceleration 3.00 m/s2. What is the angle of the incline above horizontal?
A) 35.3° B) 45.2° C) 17.8° D) 23.6° E) 53.7°