Suppose that you and two classmates are discussing the design of a roller coaster. one classmate says that each summit must be lower than the previous one. your other classmate says this is nonsense, for as long as the first one is the highest, it doesn't matter what height the others are. what do you say

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25º, b) el tiempo que el balón permanece en el aire.

Of is j/kg·k. if a 2.6 kg of isk to k, is ?