Last question on the page is the one I need help answering Metal mass (g)
45g
Metal temp before mix (°C)
45.92°C
Col water mass (g)
46 g
Cold water temp before mix (°C)
11.45°C
Mixture temp (°C)
17.59°C

it is the second option.

probably not the "magnets"in the magnet, so to speak, are thought to be electrons orbiting in shells. vurrent loops two sides to the loop

d eras and periods

the answer is b, have negligible mass