A steel bracket ABC (EI 5 4.2 3 106 N?m2) with span length L 5 4.5 m and height H 5 2 m is subjected to load P 5 15 kN at C. The maximum rotation of joint B is approximately:
(A) 0.18
(B) 0.38
(C) 0.68
(D) 0.98
(C) 0.68
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Standing Waves on a String: A string fixed at both ends is vibrating in one of its harmonics. If we now increase only the frequency at which the string is vibrating, which of the following characteristics do we also increase? (There could be more than one correct choice.)
A. the speed of the traveling waves on the string B. the period of the traveling waves on the string C. the wavelength of the traveling waves on the string D. the amplitude of the traveling waves on the string E. None of these
In the figure, the radius of curvature of the curved part of the lens is 24.0 cm, and the refractive index of the lens material is 1.750. What is the focal length of the lens?
A) +32.0 cm B) -32.0 cm C) -16.0 cm D) +13.8 cm E) -13.8 cm
Jupiter's Great Red Spot is similar to a hurricane on Earth except for its size
Indicate whether the statement is true or false
You are in distant space, where there is no gravity. You hold two blocks of metal. They look and feel identical when touched, but you been informed that one is made of lightweight aluminum and the other of lead
Can you determine which one is lead without doing any kind of chemical analysis? A) You can determine this by dropping them; the lead ball will fall fastest. B) You can determine this by dropping them; the aluminum ball will fall fastest. C) You can determine this, by tapping each block with your finger; the one that accelerates the most is aluminum. D) You can determine this by giving each block a tap with your finger; the one that accelerates the most is the lead. E) The above methods will not work.