Maxwell’s equations do not specify a reference frame. What was the significance of this for Einstein?

Which best represents the law of conservation of mass ?

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?

Which governments provide garbage collection services to homes and businesses