Solar energy
a. is a recent invention.
b. has been used for a long time.
c. has not yet been successfully developed.
d. is indirectly the source of most of the energy we use.
b, d
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If energy is carried by the bulk motion of matter, that is called ____________________
Fill in the blank(s) with correct word
Propped cantilever beam AB has moment M1 applied at joint B. Framework ABC has moment M2 applied at C. Both structures have constant flexural rigidity EI. If the ratio of the applied moments M1/M2 5 3/2, the ratio of the joint rotations at B, ?B1/?B2, is approximately:
(A) 1
(B) 3/2
(C) 2
(D) 5/2
A 1500-kg car accelerates from 0 to 25 m/s in 7.0 s with negligible friction and air resistance. What is the average power delivered by the engine? (1 hp = 746 W)
A) 50 hp B) 60 hp C) 70 hp D) 80 hp E) 90 hp
A torque of 12 N ? m is exerted on a solid, uniform disk of radius 0.50 m. If the disk accelerates at what is the mass of the disk?
A) 60 kg B) 45 kg C) 30 kg D) 15 kg