A 1700kg Boulder sits on 450m high cliff how much gravitational energy does the Boulder have?

Which of the following represents an upside-down image?

Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? check all that apply. radio waves infrared light microwaves gamma rays visible light x-rays

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?