The statement by Newton that "for every action there is an opposite but equal reaction" is regarded as which of his laws of motion?
a. first
c. third
b. second
d. fourth
C
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Consider a flat steel plate with a hole through its center. When the plate's temperature is decreased, the hole will
A) contract only if it takes up more than half the plate's surface area. B) expand if it takes up less than half the plate's surface area. C) contract. D) expand.
The kinetic energy of a pendulum is ______________ at the bottom of its swing
Fill in the blank(s) with correct word
A simply supported beam with proportional loading (P 5 4.1 kN) has span length L 5 5 m. Load P is 1.2 m from support A and load 2P is 1.5 m from support B. The bending moment just left of load 2P is approx-imately:
(A) 5.7 kN?m
(B) 6.2 kN?m
(C) 9.1 kN?m
(D) 10.1 kN?m
Stars with surface temperatures near 10,000 K have the strongest hydrogen absorption lines in their spectra.
Answer the following statement true (T) or false (F)