How does the magnetic and electrical componets of electromagnetic waves travel in relation to each other

How do convection currents form underwater mountains?

Brian's school locker has a three-digit combination lock that can be set using the numbers 5 to 9 (including 5 and 9), without repeating a number. the probability that the locker code begins with a prime number is %. the probability that the last digit of the locker code is an odd number is %.

The layers of earth are based on what two sets of characteristics?