An arrow is launched vertically upward at a speed of 50 m/s. What is the arrow’s speed at the highest point? Ignore air resistance

At the highest point, the arrow is changing from moving up to moving down. At that exact point, its speed AND its velocity are both ZERO.

And air resistance actually makes no difference.

before the big bang, the universe existed as an incredibly small singularity. ... a time, roughly 13.7 billion years ago, when the entire universe existed as a singularity. ... all of space itself --