Which of the following is the best explanation for velocity? *
The distance an object travels in a set amount of time.
How fast or slow an object is moving.
The amount of time it takes an object to move.
O
The speed and direction an object travels.

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

Which is not true about oxygen-17 and oxygen-18?

If the new moon happens on january 15th, what shape will it be on february 6th?