What metric units are used to report the mass of an object

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Why do astronauts in the space shuttle weigh less?

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.