During Solar System formation, solid particles contracted from the gas of the nebula as it cooled
a. True
b. False
Indicate whether the statement is true or false
False
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Potential Energy: Two tiny particles having charges q1 = +56.0 nC and q2 = -46.0 nC are separated by 0.500 m and held in place, as shown in the figure. A third particle, having a charge of 54.0 nC is placed at the point A, which is 0.18 m to the left of q2. How much work is needed to move the third particle from point A to point B, which is 0.40 m to the left of q1. All the points in the figure lie on the same line. (k = 1/4??0 = 9.0 × 109 N ? m2/C2) 
Fill in the blank(s) with the appropriate word(s).
The resistivity of gold is 2.44 × 10-8 ? ? m at room temperature. A gold wire that is 1.8 mm in diameter and 11 cm long carries a current of 170 mA. How much power is dissipated in the wire?
A) 0.030 mW B) 0.0076 mW C) 0.013 mW D) 0.019 mW E) 0.025 mW
A beta particle is another name for a(n) __________
Fill in the blank(s) with correct word
Lenz's Law: A circular coil lies flat on a horizontal surface. A bar magnet is held above the center of the coil with its north pole pointing down. If the magnet is dropped from this position what is the direction of the induced current in the coil, as viewed from above?
A. counterclockwise B. clockwise C. An emf but no current is induced in the coil. D. There is no current in the coil.