Find the minimum diameter of a steel wire 18 m long that will stretch no more than 9 mm when a load of 380 kg is hung on the lower end. (Y steel = 2.0 × 1011 N/m2)
What will be an ideal response?
6.89 mm
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Condensation in the solar nebula probably led to the formation of
a. icy grains beyond the present orbit of Jupiter. b. metallic grains near the present orbit of Mercury. c. silicate grains near the present orbit of Earth. d. all of the above e. none of the above
A term for electric pressure is
A) current. B) voltage. C) electric resistance.
When you look into a pool of water, the depth looks less than it actually is because the light is dispersed
a. True b. False Indicate whether the statement is true or false
A charge of 40 pC is distributed on an isolated spherical conductor that has a 4.0-cm radius. Point A is 1.0 cm from the center of the conductor and point B is 5.0 cm from the center of the conductor. Determine the electric potential difference VA ? VB
a. +1.8 V b. +29 V c. +27 V d. +7.2 V e. +9.0 V