Félix saltó desde un altura de 36402.6 m, haciendo caída libre hasta los 2567m de altura, punto en el que abrió su paracaídas. Si Félix hubiera hecho este salto en un vacío absoluto (es decir sin resistencia del aire) ¿cuánto tiempo hubiera tardado en caer y cuál hubiera sido su velocidad final al momento de abrir el paracaídas?

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass

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.

The particle p starts from rest at point a at time t = 0 and changes its speed thereafter at a constant rate of 2.8g as it follows the horizontal path shown. determine the magnitude and direction of its total acceleration (a) just before point b, (b) just after point b, and (c) as it passes point c. state your directions relative to the x-axis shown (ccw positive) and choose the angle with the smallest magnitude.