mass can be simply thought as the 'make-up' of an object.
Whether on earth or moon the mass of the astronaut won't change. ##the 'make-up' of the austranaut won't change.
The only thing thing that changes is the astronauts weight. WEIGHT IS NOT EQUAL TO MASS
W = mg , where m is mass and g is gravitational pull by the earth or moon.
Gravitational pull by the earth is greater than that of the moon. Thus the astronaut will be gr4eater on earth compare to his weight on the moon.
BUT his mass will not change.
Whether on earth or moon the mass of the astronaut won't change. ##the 'make-up' of the austranaut won't change.
The only thing thing that changes is the astronauts weight. WEIGHT IS NOT EQUAL TO MASS
W = mg , where m is mass and g is gravitational pull by the earth or moon.
Gravitational pull by the earth is greater than that of the moon. Thus the astronaut will be gr4eater on earth compare to his weight on the moon.
BUT his mass will not change.
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Remember how in Star Trek, the people sparkled in the transporter as they turned into energy and then back into mass. Einstein's equation says that mass is energy and the equivalence is E = m c^2. Mass is what things are made of. Mass bends space time so when two masses get close enough to each other they pull on each other with a certain force which according to Newton is F = G m1 m2 / r^2, that force is weight which we calculate by the acceleration due to gravity times by the mass, another of Newton's equations F = m a. Mass is what it is, weight is how much it's pulled by another mass.
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Mass is a measurement of the amount of material - and density - that makes up the astronaut. That won't change as he goes from world to world.
What *does* change is his weight. Weight is the effect of gravity on his mass. On Earth, he weighs 6 times more than he would on the moon.
What *does* change is his weight. Weight is the effect of gravity on his mass. On Earth, he weighs 6 times more than he would on the moon.
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Mass is the measurement of matter that everything is made of, the weight we experience on earth is based on gravity, so an astronaut will weight differently in the moon but have the same mass anywhere he/she is in the universe
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Mass is a measure of how much stuff is contained within some given volume and doesn't change no matter if you're on the Earth or the Moon. Weight is something different. Weight is a measure of how much your mass weighs in a gravitational field.
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Because it's one of the rules. The person who wrote the rules decided it to be like that.
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Because the astronaut in question is exactly the same person no matter where he/she is. Usually.
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your mass is how much space you take up, so as they don't change size then they keep the same mass where ever they go, it's just their weight that changes due to the lower gravity.
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Mass is the measurement of how much space an object takes up. unless he has changed size he wont change in mass