According to the united states department of energy, what is the reliability rating of the u. s. electrical grid?
a. 99.3%
b. 99.5%
c. 99.7%
d. 99.9%

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

The charge on an electron is 1.60218 × 10−19 c and its mass is 9.10939 × 10−31 kg. how strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.5 cm? answer in units of t.

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.