How much energy is required to melt 2 kg of gold? Use the table below and this equation: Q = mLfusion A) 3440 kj
B) 1720 kj
C) 10.4 kj
D) 125.6 kj

(Table is in the picture)

Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.

Which type of orbits are found in the principal energy level n = 2 a - s b - s, f c - s, d d - s, p e - s, p, d

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland