An electron moving with initial velocity v0 = 8.6x105 m / s penetrates a region where the electric field equals e = 4.1x10^3 n / c. calculate: a) the time it takes for the electron to reach rest; b) the distance traveled by it before stopping.

How can one distinguish breccia from conglomerate? a. breccia contains angular clasts and conglomerate contains rounded clasts. b. breccia contains rounded clasts and conglomerate contains angular clasts. c. different minerals cement breccia than cement conglomerate. d. breccia contains sand and conglomerate contains silt.

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Imagine you are standing in the antarctic during the southern hemisphere summer. the sky is clear and blue. there are no clouds in the sky. your shadow is cast on the icy ground. what is the color of the shadow?