A plane flies from base camp to Lake A, 280 km away in the direction 20.0∘north of east. After dropping off supplies, it flies to Lake B, which is 190 km at 30.0∘west of north from Lake A. Graphically determine the distance and direction from Lake B to the base camp.

Write the function getkthdigit(n, k) that takes a possibly-negative int n and a non-negative int k, and returns the kth digit of n, starting from 0, counting from the right

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.