You climb to the top of a ladder. You drop a a ball from height H, it reaches the ground with speed V if there is no air resistance. From what height should you drop it so it will reach the ground with three times the original speed? √3H
H
6H
9H

(pls help its due today)

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.

The mass of a bowling ball is 10 kg and the mass of a ping pong ball is 0.015 kg. if the two objects are 5 meters apart, what is the gravitational force ?