12. This is a Velocity vs. Time graph. Which time interval shows a constant velocity and no acceleration?
Velocity vs. Time
Velocity, v (m/s)
5
25
10 15 20
Time, 1 (s)

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm

Two 2.0-cm-diameter disks face each other, 1.0 mm apart. they are charged to ±10 nc. what is the electric field strength between the disks? a proton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?