I would say B because we used telescopes for space, right? And we can see the light.

If a negative object is used to charge a neutral object, then both objects become charged negatively if this answer is wrong I'm sorry.

Radio, ultraviolet, visible light, x - ray

Good morning.

**Yes, it is possible.**Energy is a scalar quantity. The value of the potential energy is calculated the following way:

Where

**m** is mass,

**g** is the acceleration of gravity and

**h** is the height.

Note that the height depends on the adopted referential, therefore, if we adopt, for example, a referential on the floor, if we dig a hole that has a depth of 1 meter, a ball that is put inside the hole will have negative potential energy due to the adopted referential, since

**h** is negativa in this case.

**Answer:**

70 kg

**Explanation:**

On earth, g = 9.8 m/s².

W = mg

700 N = m (9.8 m/s²)

m ≈ 71 kg

Rounded to 1 significant figure, the astronaut's mass is 70 kg.