The estimated age of the Milky Way Galaxy is about ________.
A. 4.6 billion years
B. 13 billion years
C. 100,000 years
D. 20 billion years
Answer: B
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A simple beam AB with an overhang BC is loaded as shown in the figure. The bending moment at the midspan of AB is approximately:
(A) 8 kN?m
(B) 12 kN?m
(C) 17 kN?m
(D) 21 kN?m
All of the ________ now observed must be primordial
Fill in the blank(s) with correct word
The coefficient of linear expansion of copper is 17 × 10-6 K-1
A block of copper 30 cm wide, 45 cm long, and 10 cm thick is heated from 0°C to 100°C What is the change in the volume of the block? A) 2.3 × 10-5 m3 B) 4.6 × 10-5 m3 C) 5.2 × 10-5 m3 D) 6.9 × 10-5 m3 E) 13.8 × 10-5 m3
A 60-kg swimmer suddenly dives horizontally from a 150-kg raft with a speed of 1.5 m/s. The raft is initially at rest
What is the speed of the raft immediately after the diver jumps, assuming that the water has negligible effect on the raft during the jump?