A series LR circuit includes a 9.0 V battery, a resistance of 0.20 
and an inductor. When the switch is closed, the circuit exhibits a time constant of 200 ms. What is the inductance of the circuit?
A. 42 mH
B. 15 mH
C. 32 mH
D. 40 mH
E. 22 mH
D. 40 mH
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The average size of a white dwarf is about the same size as the Earth
Indicate whether the statement is true or false
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. If the ratio of the applied forces P1/P2 5 5/2, the ratio of the joint B reactions RB1/RB2 is approximately:
(A) 1
(B) 5/4
(C) 3/2
(D) 2
Using an orbit size of 8 kpc, and a period of 225 million years, the mass of our Galaxy is found to be closest to:
A) 106 solar masses. B) 108 solar masses. C) 1010 solar masses. D) 1011 solar masses. E) 1012 solar masses.
A force F is exerted on an object of mass m through a distance d. A force twice as large (2F) is exerted on a mass 2m also through the distance d. Explain the relation between the amount of work done in the two cases
What will be an ideal response?