What is the maximum power level of a radio station so as to avoid electrical breakdown of air at a distance of 0.70 mm from the transmitting antenna? Assume the antenna is a point source. Air breaks down in an electric field of about 3×106V/m3×106V/m .

In a system, when potential energy decreases, then entropy also decreases. true false

1which body contains the majority of the mass in the solar system earth jupiter the moon the sun 2 what keeps the objects in the solar system such as planets orbiting around the sun the force of gravity the galaxy exerts on all objects within it including the solar system the great distance between the sun and the planets the sun's nuclear fusion which acts on each object the gravitational force between the sun and each object in the solar system

A6.0-kilogram cart initially traveling at 4.0 meters per second east accelerates uniformly at 0.50 meter per second squared east for 3.0 seconds. what is the speed of the cart at the end of this 3.0 second interval? (1) 1.5 m/s (3) 3.0 m/s (2) 5.5 m/s (4) 7.0 m/s