di quanto si ridurrebbe il peso di Roberta che ha una massa di 63.4 kg se dopo un viaggio in astronave dalla terra arrivasse su Marte (gmarte=3.73 m/s2)

Explanation:

by how much Roberta's weight would be reduced, which has a mass of 63.4 kg if, after a journey by spaceship from earth, she arrived on Mars (gmarte = 3.73 m / s2)

Mass of Roberta is 63.4 kg

Weight of an object is given by :

W = mg

On Earth. g = 9.8 m/s²

If the spaceship arrived on Mars having g equals 3.73 m/s².

Weight on Mars is :

Taking,

So,

Hence, this is the required solution.

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000

i don't know that i agree with that but what's the question ?