Author Question: The minimum amount of energy necessary to eject an electron from a metal surface is referred as ... (Read 53 times)

notis · **on:** Jul 29, 2018

The minimum amount of energy necessary to eject an electron from a metal surface is referred as Planck's constant.

Indicate whether the statement is true or false

Question 2

A curling stone slides on ice with a speed of 1.70 m/s and collides elastically with an identical, stationary curling stone.

After the collision, the first stone has a velocity of 0.800 m/s in a direction that makes a counterclockwise angle of 61.9 with its original direction of travel. At what speed and what direction is the second stone traveling after the collision?
A) 1.50 m/s at a clockwise angle of 28.1
B) 1.40 m/s at a clockwise angle of 19.1
C) 1.60 m/s at a clockwise angle of 34.2
D) 1.60 m/s at a clockwise angle of 28.1
E) 1.40 m/s at a clockwise angle of 32.3