Answer this Average Speed problem: Katie drove for 3 hours and traveled 180
miles and then drove for 2 more hours and
traveled 70 miles. What was her average
speed for the whole journey?

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot

What is the major limitation to the light microscope?

The field between two charged parallel plates is kept constant. if the two plates are brought closer together, the potential difference between the two plates either a) decrease b) does not change c) increase?