Where did the astronaut leave their cellphone?
The phone reports it has a weight of 1.83N on the planet or moon it’s been lost. It’s mass is 165g=kg (convert).
Calculate gravity. To identify where it is:

Moon:g=1.6 n/kg
Mars: __=3.7
Jupiter:__=23.1
Neptune:__=11.1

The answer to your question is The cellphone is in Neptune

Explanation:

Data

Weight = 1.83 N

mass = 165 g

Process

1.- Convert the mass in grams to kilograms

                 1000 g 1 kg

                   165 g    x

                   x = (165 x 1) / 1000

                   x = 0.165 kg

2.- Calculate the weight of the cell phone in the moon and planets.

Moon = 1.6 x 0.165 = 0.264N

Mars = 3.7 x 0.165 = 0.611 N

Jupiter = 23.1 x 0.165 = 3.8 B

Neptune = 11.1 x 0.165 = 1.83N

3.- The Astronaut forgot the cellphone in Neptune. Because the phone report a weight of the cell phone equal to the weight calculated in Neptune.

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