A positive ion has a deficiency of
A) electrons.
B) neutrons.
C) negative ions.
Answer: A
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Young's Modulus: A wire that is 1.0 mm in diameter and 3.5 m long stretches 3.5 mm when an 8.0-kg tool is hung from it.(a) What is Young's modulus for the material from this wire is made?(b) What is the effective spring constant for the stretching wire?
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Constant Acceleration Kinematics: Acceleration is sometimes expressed in multiples of g, where g = 9.8 m/s2 is the acceleration of an object due to the earth's gravity. In a car crash, the car's forward velocity may go from 29 m/s to 0 m/s in 0.15 s. How many g's are experienced, on average, by the driver?
A. 20 g B. 14 g C. 24 g D. 26 g
The rms speed of a certain sample of carbon dioxide molecules, with a molecular weight of 44.0 g/mole, is 396 m/s
What is the rms speed of water vapor molecules, with a molecular weight of 18.0 g/mol, at the same temperature as the carbon dioxide? A) 253 m/s B) 387 m/s C) 421 m/s D) 506 m/s E) 619 m/s
The curved surface of a 50-cm focal length plano-convex lens has a radius of curvature of 30 cm. What is the refractive index of the glass?
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