A block is on a ship. Its weight is 45 N. The gravity acceleration g = 10 N/kg. When the block is brought to a space station surrounding the Earth, how much is its mass?

4.5 kg

Explanation:

Since weight, W = mg where m = mass and g = gravity acceleration = 10 N/kg and W = 45 N

m = W/g

= 45 N/10 N/kg

= 4.5 kg

The mass of the block on the ship is thus 4.5 kg. Since mass is an intrinsic property of a substance and does not change with location, the mass of the block when it is brought to as space station surrounding the earth is also 4.5 kg.

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.