What TWO things make it impossible to travel to Earth's core or live there? (hint: one starts with the letter "h" and the other starts with the letter "p")

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here