1. Electrons are accelerated in the picture tube of a television through a potential difference of 8.00 x 10ºV. (Use the values qe=1.60 x 10-19 C and
me=9.109 x 10-31 kg.)

a. What is the change in the potential energy of each electron traveling in
this tube?

b. What is the change in the kinetic energy of the electrons?

c. At what speed do the electrons hit the screen?

Arod of some material 0.20 m long elongates 0.20 mm on heating from 21 to 120°c. determine the value of the linear coefficient of thermal expansion [in (degrees c)^-1] for this material.

Road users moving into your lane, brake lights, and abrupt changes in road surface are a. rare at night b. indicators of potential hazards c. not worth worrying about before you reach them d. no problem for experienced drivers

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.