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?
What will be an ideal response?
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 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?
What will be an ideal response?
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