17 copper wires of length l and diameter d are connected in parallel to form a single composite conductor of resistance r. what is the ratio of the diameter of a single copper wire to d, if its length is also l and it has the same resistance?

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.

Acar starts from rest at a stop sign and reaches a velocity of 25 m/s w in 4 seconds. determine the acceleration of the car. question 3 options: a) 6,25 m/s2 b)6.25 m/s c)100 m/s2 d)100 m/s