1. Se observa que la mayor parte de las galaxias del universo se alejan de nuestro sistema de referencia. La galaxia del Sombrero está emitiendo luz con una longitud de onda
de 700nm. a) Si la galaxia se aleja con una velocidad de 90000 km/s ¿Cuál es la
frecuencia percibida en la Tierra? b) Si la galaxia se acerca con una velocidad de
90000 ¿Cuál es la frecuencia percibida en la Tierra?

What is the temperature in degrees celsius of a substance with a tempature of 49k

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 (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to

If a hiker that weighs 600 newtons climbs a 50 meter hill, how much gravitational potential energy has the hiker gained?