A very long conducting tube (hollow cylinder) has inner radius
a
a
and outer radius
b
b
. It carries charge per unit length
−α
−α
where
α
α
is a positive constant with units of
C/m
C/m
. A line of charge lies along the axis of the tube. The line of charge has charge per unit length
+α
+α

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

As the distance from a magnet increases, what happens to the magnet force?

Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?