ACTIVIDAD No. 1: a. Realiza las siguientes conversiones entre unidades de longitud
- Expresar 420 m en Km
- Expresar 2,14 mi en in
- Expresar 354 yd en ft
- Expresar 90 cm en in
b. Realiza las siguientes conversiones entre unidades de tiempo
- Expresar 2500 s en horas
- Expresar 3.5 h en min
- Expresar 0,43 siglos en meses
- Expresar 2 h en s

An object of dimensions 50 cm x 40 cm x 0.20 cm has a mass 60g. find its density in g/cm3 and kg/ m3

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.

On a mild saturday morning while people are working inside, the furnace keeps the temperature inside the building at 23degreesc. at noon the furnace is turned off, and the people go home. the temperature outside is a constant 16degreesc for the rest of the afternoon. if the time constant for the building is 3 hr, when will the temperature inside the building reach 18degreesc? if some windows are left open and the time constant drops to 2 hr, when will the temperature inside reach 18degreesc?