A simple beam (L 5 9 m) with attached bracket BDE has force P 5 5 kN applied downward at E. The bending moment just right of B is approximately:
(A) 6 kN?m
(B) 10 kN?m
(C) 19 kN?m
(D) 22 kN?m
(C) 19 kN?m
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When a 45-kg person steps on a scale in an elevator, the scale reads a steady 410 N. Which of the following statements must be true? (There could be more than one correct choice.)
A) The elevator is accelerating upward at a constant rate. B) The elevator is accelerating downward at a constant rate. C) The elevator is moving upward at a constant rate. D) From the given information, we cannot tell if the elevator is moving up or down.
How do earthquake-generated waves help scientists deduce the internal structure of Earth?
A. Secondary waves are detected at a seismometer when they pass through solid materials. B. The path of waves bends as they travel through material of different density. C. Primary waves are detected at a seismometer when they pass through solid or liquid materials. D. Earthquake-generated waves can be detected and studied anywhere in the world. E. All of these choices are correct.
What can you conclude about a Type I supernova?
A) It was originally a high-mass star. B) Its spectrum will show large amounts of hydrogen. C) It was originally a low-mass star. D) Its core was mostly iron. E) The star never reached the Chandrasekhar limit.
Which one of the following cannot be a definition of an elastic modulus?
A.
B.
C.
D.
E.
