In cathodic protection of a metal structure, the structure is connected to the _________terminal of a battery.
Fill in the blank(s) with the appropriate word(s).
negative
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Explain why galaxy collisions are far more common than star-star collisions.
What will be an ideal response?
A vertical 30-cm steel rod, 1.0 cm in diameter, supports a 300-kg mass. What is the change in length of the rod caused by this mass? Young's modulus for steel is 2.0 × 1011 N/m2
A) 6.5 × 10-4 m B) 5.6 × 10-6 m C) 6.5 × 10-6 m D) 6.5 × 10-5 m E) 5.6 × 10-5 m
A particle (charge = Q) is kept in a fixed position at point P, and a second particle (charge = q) is released from rest when it is a distance R from P. If Q = +2.0 mC, q = -1.5 mC, and R = 30 cm, what is the kinetic energy of the moving particle after it has moved a distance of 10 cm?
a. 60 kJ b. 45 kJ c. 75 kJ d. 90 kJ e. 230 kJ
_____ is the principal means of energy transport in the interiors of most stars
A) Conduction B) Radiation C) Evaporation D) Advection