7.0 kg is hung from a steel wire of diameter 0.75 mm and length 2.5 meters. (S = 8.2 × 1010 N/m2; Y = 20 × 1010 N/m2)
(a) By how much does the wire stretch?
(b) If the wire diameter were doubled, what would be the stretch?
(a) 1.9 mm
(b) 0.49 mm
You might also like to view...
If a star has a parallax of 0.02 seconds of arc, then its distance is
a. 20 pc. b. 50 pc. c. 2 pc. d. 5 pc. e. 500 pc.
Which of the following bodies is comprised mostly of plasma?
A) Earth B) Moon C) Sun D) all of the above E) none of the above
When the nucleus of an atom emits an alpha particle, the atom's atomic number
A) decreases. B) remains unchanged. C) increases.
You have a machine which can accelerate pucks on frictionless ice. Starting from rest, the puck travels a distance x in time t when force F is applied. If force 3F is applied, the distance the puck travels in time t is
a. x. b. (3/2)x. c. 3x. d. (9/2)x. e. 9x.