Your textbook is transported from Earth to the Moon. Which of the following statements is true?

1. The mass of your textbook will change but the weight of your textbook will remain the same.
2. Both the mass & the weight of your textbook will remain the same.
3. Both the mass & the weight of your textbook will change.
4. The mass of your textbook will remain the same but the weight of your textbook will change.

My answer is no. 4.

The change in weight is due to the change in gravity.

To answer this question, let's review some basic physics concepts.

1. Mass: Mass describes the amount of matter in an object and remains constant regardless of the object's location.
2. Weight: Weight measures the force of gravity acting on an object and depends on both the mass of the object and the gravitational field it is in.

Now, let's consider the scenario of transporting your textbook from Earth to the Moon:

1. The mass of your textbook will remain the same: Since mass is an intrinsic property of an object, it does not change regardless of its location. So, option 1 is correct.

2. The weight of your textbook will change: Since weight depends on the gravitational field, which varies between the Earth and the Moon, the weight of your textbook will be different. On the Moon, where the gravitational field is weaker than on Earth, the weight of the textbook will be less. Therefore, option 4 is correct.

So, the correct answer is: 4. The mass of your textbook will remain the same, but the weight of your textbook will change when transported from Earth to the Moon.