A small ball of mass m,-0.84kg and initial speed v,-18.2m/s makes a collision with another ball of mass m, -1.4kg which is initially at rest on a frictionless horizontal table. After the collision the balls move as shown in the figure. Given 8-24°, determine the speed of m; just after the collision, that is, v;-? Express you answer using one decimal place.

Argon, neon, and xenon are examples of

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9