Answer:
t = 25.5 min
Explanation:
To know how many minutes does Richard save, you first calculate the time that Richard takes with both velocities v1 = 65mph and v2 = 80mph.

Next, you calculate the difference between both times t1 and t2:

This is the time that Richard saves when he drives with a speed of 80mph. Finally, you convert the result to minutes:

hence, Richard saves 25.5 min (25 min and 30 s) when he drives with a speed of 80mph
It accelerates in the y component (bc of gravity) AND the x-component (b/c of the friction force).
Answer:
83816746.4254 m/s
Explanation:
m = Mass of electron = 
q = Charge of electron = 
V = Voltage = 
The kinetic energy of the electron is

Energy is given by

Balancing the energy

The velocity of the electrons is 83816746.4254 m/s
Answer:
4 electric pole is the answer.