What causes different colors to appear in the sky? the absorption of light by air molecules
the reflection of light by bodies of water
the greenhouse effect in Earth’s atmosphere
the scattering and reflection of light by dust particles

Under normal temperature and pressure conditions, what type of rock could be formed from weathering in erosion of metamorphic rock

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

**urgent** roberto plans to use two transformers to reduce a voltage of 120 v to 4 v. he uses a transformer that has 300 coils in the primary winding and 50 coils in the secondary winding. he has four other transformers, as listed in the table. which transformer should roberto use to have an ending voltage of 4 v? a- w b-xc- yd- z