A light beam has speed c in vacuum. A transparent material has an index of refraction n. Which of the following expressions gives the speed of light in the transparent material? a. nc
b. (n/c)2
c. n/c
d. c/n
e. (c/n)2

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

Atruck driver is attempting to deliver some furniture. first, he travels 8 km east, and then he turns around and travels 3 km west. finally, he turns again and travels 13 km to his destination. what is the drivers distance

Aman is trying to drag a small tree that he cut down. if the static coefficient of friction of the tree on the ground is 0.5 and the tree weighs 670 n, what is the minimum amount of horizontal force that the man will need to apply so that the tree will start moving? o a. 465 n o b. 230 n o c. 670 n o d. 335 n